Area Code 331 — Chicago, Elgin, Riverdale, Illinois – TelecomRouting

Reference Data

Area Code Directory

Area Code 331 — Chicago, Elgin, Riverdale, Illinois

Active

Data last updated: June 25, 2026

State

Illinois

Country

Timezone

America/Chicago

Assigned

July 6, 2007

Exchanges (NXX)

785

Carriers

Rate Centers

Overlay

Yes — 224, 630, 847

Top Carriers

Carrier	OCN	NXX Count
T-MOBILE USA, INC.	6529	41
ONVOY, LLC	224C	38
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	6333	33
NEW CINGULAR WIRELESS PCS, LLC - IL	6534	25
FRACTEL, LLC	965H	18
BANDWIDTH.COM CLEC, LLC - IL	984E	11
TON80 COMMUNICATIONS, LLC	516J	9
PEERLESS NETWORK OF ILLINOIS, LLC - IL	063E	5
LEVEL 3 COMMUNICATIONS, LLC - IL	6115	5
ONVOY SPECTRUM, LLC	624H	5

Rate Centers

Exchange Listings (NXX)

NPA-NXX	Carrier	Rate Center	Type	LATA	Status
331-200	T-MOBILE USA, INC.	BARTLETT	Wireless	358	active
331-201	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-202	T-MOBILE USA, INC.	ELMHURST	Wireless	358	active
331-203	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-204	ONVOY, LLC	NAPERVILLE	Landline	358	active
331-205	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-206	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-207	LEVEL 3 COMMUNICATIONS, LLC - IL	YORKVILLE	Landline	358	active
331-208	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-209	LEVEL 3 COMMUNICATIONS, LLC - IL	ELMHURST	Landline	358	active
331-210	PEERLESS NETWORK OF ILLINOIS, LLC - IL	ST CHARLES	Landline	358	active
331-212	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	AURORA	Landline	358	active
331-213	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-214	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-215	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-216	NEW CINGULAR WIRELESS PCS, LLC - IL	OSWEGO	Wireless	358	active
331-217	ONVOY, LLC	LOMBARD	Landline	358	active
331-218	T-MOBILE USA, INC.	WHEATON	Wireless	358	active
331-219	TELNYX LLC	AURORA	VoIP	358	active
331-220	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-221	ILLINOIS BELL TEL CO	ELMHURST	Landline	358	active
331-222	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-223	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-224	ONVOY, LLC	ITASCA	Landline	358	active
331-225	T-MOBILE USA, INC.	ELMHURST	Wireless	358	active
331-226	T-MOBILE USA, INC.	NAPERVILLE	Wireless	358	active
331-227	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	SUGARGROVE	Wireless	358	active
331-228	PAETEC ITEL, LLC	ST CHARLES	VoIP	358	active
331-229	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-230	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-231	NEW CINGULAR WIRELESS PCS, LLC - IL	NAPERVILLE	Wireless	358	active
331-232	NEW CINGULAR WIRELESS PCS, LLC - IL	W CHICAGO	Wireless	358	active
331-233	TELNYX LLC	DOWNERSGRV	VoIP	358	active
331-234	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	SUGARGROVE	Wireless	358	active
331-235	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-236	T-MOBILE USA, INC.	WHEATON	Wireless	358	active
331-237	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	NAPERVILLE	Landline	358	active
331-238	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	DOWNERSGRV	VoIP	358	active
331-239	ONVOY, LLC	YORKVILLE	Landline	358	active
331-240	PEERLESS NETWORK OF ILLINOIS, LLC - IL	W CHICAGO	Landline	358	active
331-241	ONVOY, LLC	LOMBARD	Landline	358	active
331-242	T-MOBILE USA, INC.	LOMBARD	Wireless	358	active
331-243	T-MOBILE USA, INC.	LOMBARD	Wireless	358	active
331-244	ONVOY, LLC	NAPERVILLE	Landline	358	active
331-245	T-MOBILE USA, INC.	BARTLETT	Wireless	358	active
331-246	T-MOBILE USA, INC.	LEMONT	Wireless	358	active
331-247	VONAGE AMERICA LLC	NAPERVILLE	VoIP	358	active
331-248	COMCAST IP PHONE, LLC	GENEVA	VoIP	358	active
331-249	ONVOY, LLC	NAPERVILLE	Landline	358	active
331-250	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-251	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-252	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	WARRENVL	VoIP	358	active
331-253	T-MOBILE USA, INC.	LEMONT	Wireless	358	active
331-254	T-MOBILE USA, INC.	SUGARGROVE	Wireless	358	active
331-255	ONVOY, LLC	AURORA	Landline	358	active
331-256	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-257	NEW CINGULAR WIRELESS PCS, LLC - IL	AURORA	Wireless	358	active
331-258	ONVOY, LLC	AURORA	Landline	358	active
331-259	PEERLESS NETWORK OF ILLINOIS, LLC - IL	SUGARGROVE	Landline	358	active
331-260	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	DOWNERSGRV	VoIP	358	active
331-261	T-MOBILE USA, INC.	LEMONT	Wireless	358	active
331-262	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-263	ONVOY, LLC	ITASCA	Landline	358	active
331-264	LEVEL 3 COMMUNICATIONS, LLC - IL	HINSDALE	Landline	358	active
331-265	ONVOY, LLC	GENEVA	Landline	358	active
331-266	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-267	VONAGE AMERICA LLC	LOMBARD	VoIP	358	active
331-268	T-MOBILE USA, INC.	SUGARGROVE	Wireless	358	active
331-269	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-270	ONVOY, LLC	AURORA	Landline	358	active
331-271	ONVOY, LLC	HINSDALE	Landline	358	active
331-272	ONVOY, LLC	ST CHARLES	Landline	358	active
331-273	ONVOY, LLC	LEMONT	Landline	358	active
331-274	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-275	T-MOBILE USA, INC.	BARTLETT	Wireless	358	active
331-276	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	ST CHARLES	Wireless	358	active
331-277	NEW CINGULAR WIRELESS PCS, LLC - IL	LOMBARD	Wireless	358	active
331-278	NEW CINGULAR WIRELESS PCS, LLC - IL	AURORA	Wireless	358	active
331-279	PAETEC ITEL, LLC	ELMHURST	VoIP	358	active
331-280	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-281	ILLINOIS BELL TEL CO	NAPERVILLE	Landline	358	active
331-282	ONVOY, LLC	HINSDALE	Landline	358	active
331-283	T-MOBILE USA, INC.	GENEVA	Wireless	358	active
331-284	T-MOBILE USA, INC.	BARTLETT	Wireless	358	active
331-285	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-286	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	ST CHARLES	Wireless	358	active
331-287	BANDWIDTH.COM CLEC, LLC - IL	AURORA	VoIP	358	active
331-288	TON80 COMMUNICATIONS, LLC	ELBURN	VoIP	358	active
331-289	T-MOBILE USA, INC.	HINSDALE	Wireless	358	active
331-290	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-291	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-292	ONVOY SPECTRUM, LLC	DOWNERSGRV	Wireless	358	active
331-293	NEW CINGULAR WIRELESS PCS, LLC - IL	AURORA	Wireless	358	active
331-294	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-295	NUSO, LLC	AURORA	VoIP	358	active
331-296	BOOST SUBSCRIBERCO L.L.C.	WHEATON	Wireless	358	active
331-297	ONVOY, LLC	BATAVIA	Landline	358	active
331-298	ONVOY, LLC	NAPERVILLE	Landline	358	active
331-299	FRACTEL, LLC	HINSDALE	VoIP	358	active
331-300	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-301	METROPCS, INC.	AURORA	Wireless	358	active
331-302	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-303	BANDWIDTH.COM CLEC, LLC - IL	ELBURN	VoIP	358	active
331-304	T-MOBILE USA, INC.	BARTLETT	Wireless	358	active
331-305	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-306	ONVOY, LLC	DOWNERSGRV	Landline	358	active
331-307	T-MOBILE USA, INC.	LOMBARD	Wireless	358	active
331-308	BANDWIDTH.COM CLEC, LLC - IL	BARTLETT	VoIP	358	active
331-309	COMMIO, LLC	LEMONT	VoIP	358	active
331-310	BANDWIDTH.COM CLEC, LLC - IL	BIG ROCK	VoIP	358	active
331-312	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-313	ONVOY SPECTRUM, LLC	NAPERVILLE	Wireless	358	active
331-314	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	ST CHARLES	Wireless	358	active
331-315	NEW CINGULAR WIRELESS PCS, LLC - IL	LOMBARD	Wireless	358	active
331-316	COMMIO, LLC	NAPERVILLE	VoIP	358	active
331-317	COMMIO, LLC	HINSDALE	VoIP	358	active
331-318	BANDWIDTH.COM CLEC, LLC - IL	LEMONT	VoIP	358	active
331-319	ONVOY, LLC	AURORA	Landline	358	active
331-320	ONVOY, LLC	BARTLETT	Landline	358	active
331-321	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-322	ONVOY, LLC	LOMBARD	Landline	358	active
331-323	ONVOY, LLC	GLEN ELLYN	Landline	358	active
331-324	ONVOY, LLC	YORKVILLE	Landline	358	active
331-325	ONVOY SPECTRUM, LLC	LEMONT	Wireless	358	active
331-326	ONVOY, LLC	DOWNERSGRV	Landline	358	active
331-327	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	ST CHARLES	Wireless	358	active
331-328	NEW CINGULAR WIRELESS PCS, LLC - IL	NAPERVILLE	Wireless	358	active
331-329	ONVOY, LLC	AURORA	Landline	358	active
331-330	NEW CINGULAR WIRELESS PCS, LLC - IL	NAPERVILLE	Wireless	358	active
331-331	ONVOY, LLC	AURORA	Landline	358	active
331-332	NEW CINGULAR WIRELESS PCS, LLC - IL	NAPERVILLE	Wireless	358	active
331-333	NEW CINGULAR WIRELESS PCS, LLC - IL	NAPERVILLE	Wireless	358	active
331-334	ONVOY, LLC	BATAVIA	Landline	358	active
331-335	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-336	FRACTEL, LLC	AURORA	VoIP	358	active
331-337	NEW CINGULAR WIRELESS PCS, LLC - IL	OSWEGO	Wireless	358	active
331-338	ONVOY SPECTRUM, LLC	AURORA	Wireless	358	active
331-339	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-340	ONVOY, LLC	ITASCA	Landline		active
331-341	ONVOY, LLC	PLANO	Landline	358	active
331-342	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Landline		active
331-343	ONVOY, LLC	DOWNERSGRV	Landline	358	active
331-344	ONVOY, LLC	W CHICAGO	Landline		active
331-345	FRACTEL, LLC	NAPERVILLE	VoIP	358	active
331-346	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Landline		active
331-347			Landline		active
331-348	FRACTEL, LLC	ELBURN	VoIP	358	active
331-349			Landline		active
331-350			Landline		active
331-351			Landline		active
331-352			Landline		active
331-353			Landline		active
331-354			Landline		active
331-355			Landline		active
331-356	FRACTEL, LLC	BARTLETT	VoIP	358	active
331-357			Landline		active
331-358			Landline		active
331-359			Landline		active
331-360			Landline		active
331-361			Landline		active
331-362			Landline		active
331-363			Landline		active
331-364			Landline		active
331-365			Landline		active
331-366			Landline		active
331-367			Landline		active
331-368			Landline		active
331-369			Landline		active
331-370			Landline		active
331-371			Landline		active
331-372			Landline		active
331-373	TON80 COMMUNICATIONS, LLC	OSWEGO	VoIP	358	active
331-374			Landline		active
331-375			Landline		active
331-376			Landline		active
331-377			Landline		active
331-378			Landline		active
331-379			Landline		active
331-380			Landline		active
331-381			Landline		active
331-382			Landline		active
331-383			Landline		active
331-384			Landline		active
331-385	NEW CINGULAR WIRELESS PCS, LLC - IL	AURORA	Wireless	358	active
331-386			Landline		active
331-387			Landline		active
331-388	FRACTEL, LLC	SUGARGROVE	VoIP	358	active
331-389			Landline		active
331-390			Landline		active
331-391			Landline		active
331-392			Landline		active
331-393			Landline		active
331-394			Landline		active
331-395			Landline		active
331-396			Landline		active
331-397			Landline		active
331-398			Landline		active
331-399	FRACTEL, LLC	DOWNERSGRV	VoIP	358	active
331-400	FRACTEL, LLC	OSWEGO	VoIP	358	active
331-401	LEVEL 3 COMMUNICATIONS, LLC - IL	NAPERVILLE	Landline	358	active
331-402			Landline		active
331-403			Landline		active
331-404			Landline		active
331-405			Landline		active
331-406			Landline		active
331-407			Landline		active
331-408			Landline		active
331-409			Landline		active
331-410			Landline		active
331-412			Landline		active
331-413			Landline		active
331-414			Landline		active
331-415			Landline		active
331-416			Landline		active
331-417			Landline		active
331-418			Landline		active
331-419			Landline		active
331-420			Landline		active
331-421			Landline		active
331-422	LEVEL 3 COMMUNICATIONS, LLC - IL	ST CHARLES	Landline	358	active
331-423			Landline		active
331-424			Landline		active
331-425	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-426	TON80 COMMUNICATIONS, LLC	LEMONT	VoIP	358	active
331-427			Landline		active
331-428			Landline		active
331-429			Landline		active
331-430			Landline		active
331-431	BANDWIDTH.COM CLEC, LLC - IL	AURORA	VoIP	358	active
331-432			Landline		active
331-433			Landline		active
331-434			Landline		active
331-435			Landline		active
331-436			Landline		active
331-437			Landline		active
331-438			Landline		active
331-439			Landline		active
331-440			Landline		active
331-441			Landline		active
331-442	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	ST CHARLES	Wireless	358	active
331-443			Landline		active
331-444	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-445			Landline		active
331-446			Landline		active
331-447			Landline		active
331-448			Landline		active
331-449			Landline		active
331-450			Landline		active
331-451			Landline		active
331-452	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	AURORA	Wireless	358	active
331-453			Landline		active
331-454	NEW CINGULAR WIRELESS PCS, LLC - IL	AURORA	Wireless	358	active
331-455			Landline		active
331-456	FIRST COMMUNICATIONS, LLC	ROSELLE	VoIP	358	active
331-457	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-458			Landline		active
331-459			Landline		active
331-460			Landline		active
331-461			Landline		active
331-462	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	LOMBARD	Landline	358	active
331-463			Landline		active
331-464			Landline		active
331-465	NEW CINGULAR WIRELESS PCS, LLC - IL	W CHICAGO	Wireless	358	active
331-466	TON80 COMMUNICATIONS, LLC	GLEN ELLYN	VoIP	358	active
331-467			Landline		active
331-468			Landline		active
331-469			Landline		active
331-470			Landline		active
331-471			Landline		active
331-472	T-MOBILE USA, INC.	NAPERVILLE	Wireless	358	active
331-473			Landline		active
331-474			Landline		active
331-475			Landline		active
331-476			Landline		active
331-477			Landline		active
331-478			Landline		active
331-479			Landline		active
331-480			Landline		active
331-481	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-482			Landline		active
331-483			Landline		active
331-484			Landline		active
331-485			Landline		active
331-486			Landline		active
331-487			Landline		active
331-488			Landline		active
331-489			Landline		active
331-490			Landline		active
331-491			Landline		active
331-492			Landline		active
331-493			Landline		active
331-494			Landline		active
331-495			Landline		active
331-496			Landline		active
331-497			Landline		active
331-498			Landline		active
331-499			Landline		active
331-500	FRACTEL, LLC	GENEVA	VoIP	358	active
331-501			Landline		active
331-502			Landline		active
331-503			Landline		active
331-504			Landline		active
331-505			Landline		active
331-506			Landline		active
331-507			Landline		active
331-508			Landline		active
331-509			Landline		active
331-510			Landline		active
331-512			Landline		active
331-513			Landline		active
331-514			Landline		active
331-515			Landline		active
331-516			Landline		active
331-517			Landline		active
331-518			Landline		active
331-519			Landline		active
331-520			Landline		active
331-521			Landline		active
331-522			Landline		active
331-523			Landline		active
331-524			Landline		active
331-525			Landline		active
331-526			Landline		active
331-527			Landline		active
331-528			Landline		active
331-529	FRACTEL, LLC	NAPERVILLE	VoIP	358	active
331-530			Landline		active
331-531			Landline		active
331-532			Landline		active
331-533			Landline		active
331-534			Landline		active
331-535			Landline		active
331-536			Landline		active
331-537			Landline		active
331-538			Landline		active
331-539			Landline		active
331-540			Landline		active
331-541			Landline		active
331-542			Landline		active
331-543			Landline		active
331-544			Landline		active
331-545			Landline		active
331-546			Landline		active
331-547			Landline		active
331-548			Landline		active
331-549			Landline		active
331-550			Landline		active
331-551	NEW CINGULAR WIRELESS PCS, LLC - IL	LOMBARD	Wireless	358	active
331-552			Landline		active
331-553			Landline		active
331-554			Landline		active
331-556			Landline		active
331-557			Landline		active
331-558			Landline		active
331-559			Landline		active
331-560			Landline		active
331-561			Landline		active
331-562			Landline		active
331-563			Landline		active
331-564			Landline		active
331-565			Landline		active
331-566			Landline		active
331-567			Landline		active
331-568			Landline		active
331-569			Landline		active
331-570			Landline		active
331-571			Landline		active
331-572			Landline		active
331-573			Landline		active
331-574			Landline		active
331-575	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-576			Landline		active
331-577			Landline		active
331-578			Landline		active
331-579			Landline		active
331-580			Landline		active
331-581			Landline		active
331-582			Landline		active
331-583			Landline		active
331-584			Landline		active
331-585			Landline		active
331-586			Landline		active
331-587			Landline		active
331-588	NEW CINGULAR WIRELESS PCS, LLC - IL	ST CHARLES	Wireless	358	active
331-589			Landline		active
331-590			Landline		active
331-592			Landline		active
331-593			Landline		active
331-594			Landline		active
331-595			Landline		active
331-596			Landline		active
331-597			Landline		active
331-598			Landline		active
331-599			Landline		active
331-600	FRACTEL, LLC	WHEATON	VoIP	358	active
331-601			Landline		active
331-602			Landline		active
331-603			Landline		active
331-604			Landline		active
331-605			Landline		active
331-606			Landline		active
331-607			Landline		active
331-608			Landline		active
331-609			Landline		active
331-610			Landline		active
331-612			Landline		active
331-613			Landline		active
331-614			Landline		active
331-615			Landline		active
331-616			Landline		active
331-617			Landline		active
331-618			Landline		active
331-619			Landline		active
331-620			Landline		active
331-621			Landline		active
331-622			Landline		active
331-623			Landline		active
331-624			Landline		active
331-625	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-626			Landline		active
331-627	TON80 COMMUNICATIONS, LLC	LOMBARD	VoIP	358	active
331-628			Landline		active
331-629			Landline		active
331-630			Landline		active
331-631	ONVOY SPECTRUM, LLC	DOWNERSGRV	Wireless	358	active
331-632			Landline		active
331-633			Landline		active
331-634			Landline		active
331-635			Landline		active
331-636			Landline		active
331-637			Landline		active
331-638			Landline		active
331-639			Landline		active
331-640			Landline		active
331-641			Landline		active
331-642	BANDWIDTH.COM CLEC, LLC - IL	ELMHURST	VoIP	358	active
331-643	METROPCS, INC.	AURORA	Wireless	358	active
331-644			Landline		active
331-645	METROPCS, INC.	ELMHURST	Wireless	358	active
331-646			Landline		active
331-647			Landline		active
331-648			Landline		active
331-649			Landline		active
331-650			Landline		active
331-651			Landline		active
331-652			Landline		active
331-653			Landline		active
331-654			Landline		active
331-655			Landline		active
331-656			Landline		active
331-657			Landline		active
331-658			Landline		active
331-659			Landline		active
331-660			Landline		active
331-661			Landline		active
331-662			Landline		active
331-663			Landline		active
331-664			Landline		active
331-665			Landline		active
331-666	ONVOY, LLC	AURORA	Landline	358	active
331-667			Landline		active
331-668			Landline		active
331-669			Landline		active
331-670			Landline		active
331-671			Landline		active
331-672			Landline		active
331-673			Landline		active
331-674			Landline		active
331-675			Landline		active
331-676			Landline		active
331-677			Landline		active
331-678			Landline		active
331-679			Landline		active
331-680			Landline		active
331-681			Landline		active
331-682			Landline		active
331-683			Landline		active
331-684	RCN TELECOM SERVICES OF ILLINIOS, INC. - IL	AURORA	Landline	358	active
331-685			Landline		active
331-686			Landline		active
331-687			Landline		active
331-688	TON80 COMMUNICATIONS, LLC	NAPERVILLE	VoIP	358	active
331-689			Landline		active
331-690			Landline		active
331-691			Landline		active
331-692			Landline		active
331-693			Landline		active
331-694			Landline		active
331-695			Landline		active
331-696			Landline		active
331-697			Landline		active
331-698			Landline		active
331-699			Landline		active
331-701	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	NAPERVILLE	Wireless	358	active
331-702	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL	NAPERVILLE	Landline	358	active
331-703	T-MOBILE USA, INC.	W CHICAGO	Wireless	358	active
331-704	BANDWIDTH.COM CLEC, LLC - IL	KANEVILLE	VoIP	358	active
331-705			Landline		active
331-706			Landline		active
331-707	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-708			Landline		active
331-709			Landline		active
331-710			Landline		active
331-712			Landline		active
331-713			Landline		active
331-714			Landline		active
331-715			Landline		active
331-716	ONVOY, LLC	WHEATON	Landline	358	active
331-717	NEW CINGULAR WIRELESS PCS, LLC - IL	OSWEGO	Wireless	358	active
331-718			Landline		active
331-719			Landline		active
331-720			Landline		active
331-721			Landline		active
331-722			Landline		active
331-723			Landline		active
331-724			Landline		active
331-725	NEW CINGULAR WIRELESS PCS, LLC - IL	OSWEGO	Wireless	358	active
331-726			Landline		active
331-727			Landline		active
331-728			Landline		active
331-729			Landline		active
331-730			Landline		active
331-731			Landline		active
331-732	FRACTEL, LLC	GENEVA	VoIP	358	active
331-733			Landline		active
331-734			Landline		active
331-735			Landline		active
331-736			Landline		active
331-737			Landline		active
331-738			Landline		active
331-739			Landline		active
331-740			Landline		active
331-741			Landline		active
331-742			Landline		active
331-743			Landline		active
331-744			Landline		active
331-745			Landline		active
331-746	TON80 COMMUNICATIONS, LLC	KANEVILLE	VoIP	358	active
331-747			Landline		active
331-748			Landline		active
331-749			Landline		active
331-750			Landline		active
331-751			Landline		active
331-752			Landline		active
331-753			Landline		active
331-754			Landline		active
331-755			Landline		active
331-756			Landline		active
331-757	T-MOBILE USA, INC.	LEMONT	Wireless	358	active
331-758	FRACTEL, LLC	AURORA	VoIP	358	active
331-759			Landline		active
331-760			Landline		active
331-761			Landline		active
331-762			Landline		active
331-763			Landline		active
331-764			Landline		active
331-765			Landline		active
331-766			Landline		active
331-767			Landline		active
331-768			Landline		active
331-769			Landline		active
331-770			Landline		active
331-771	ONVOY, LLC	ST CHARLES	Landline	358	active
331-772			Landline		active
331-773			Landline		active
331-774			Landline		active
331-775	COMCAST IP PHONE, LLC	DOWNERSGRV	VoIP	358	active
331-776			Landline		active
331-777	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-778			Landline		active
331-779			Landline		active
331-780			Landline		active
331-781			Landline		active
331-782			Landline		active
331-783			Landline		active
331-784			Landline		active
331-785			Landline		active
331-786			Landline		active
331-787			Landline		active
331-788	FRACTEL, LLC	GENEVA	VoIP	358	active
331-789			Landline		active
331-790			Landline		active
331-791			Landline		active
331-792			Landline		active
331-793			Landline		active
331-794			Landline		active
331-795			Landline		active
331-796			Landline		active
331-797			Landline		active
331-798			Landline		active
331-799			Landline		active
331-800	ONVOY, LLC	W CHICAGO	Landline	358	active
331-801	TELEPORT COMMUNICATIONS AMERICA, LLC - IL	DOWNERSGRV	Landline	358	active
331-802			Landline		active
331-803	PEERLESS NETWORK OF ILLINOIS, LLC - IL	LEMONT	Landline	358	active
331-804			Landline		active
331-805			Landline		active
331-806	COMCAST IP PHONE, LLC	WHEATON	VoIP	358	active
331-807			Landline		active
331-808	BANDWIDTH.COM CLEC, LLC - IL	PLANO	VoIP	358	active
331-809			Landline		active
331-810			Landline		active
331-812			Landline		active
331-813			Landline		active
331-814	T-MOBILE USA, INC.	NAPERVILLE	Wireless	358	active
331-815			Landline		active
331-816			Landline		active
331-817			Landline		active
331-818			Landline		active
331-819			Landline		active
331-820			Landline		active
331-821			Landline		active
331-822			Landline		active
331-823			Landline		active
331-824			Landline		active
331-825	DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL	GENEVA	Landline		active
331-826	T-MOBILE USA, INC.	ELMHURST	Wireless	358	active
331-827			Landline		active
331-828			Landline		active
331-829			Landline		active
331-830			Landline		active
331-831			Landline		active
331-832			Landline		active
331-833			Landline		active
331-834			Landline		active
331-835			Landline		active
331-836			Landline		active
331-837	TON80 COMMUNICATIONS, LLC	W CHICAGO	VoIP	358	active
331-838			Landline		active
331-839			Landline		active
331-840			Landline		active
331-841			Landline		active
331-842			Landline		active
331-843			Landline		active
331-844			Landline		active
331-845			Landline		active
331-846			Landline		active
331-847			Landline		active
331-848			Landline		active
331-849			Landline		active
331-850	ONVOY, LLC	BIG ROCK	Landline	358	active
331-851			Landline		active
331-852			Landline		active
331-853			Landline		active
331-854			Landline		active
331-855			Landline		active
331-856			Landline		active
331-857			Landline		active
331-858			Landline		active
331-859			Landline		active
331-860			Landline		active
331-861			Landline		active
331-862			Landline		active
331-863			Landline		active
331-864			Landline		active
331-865			Landline		active
331-866	TON80 COMMUNICATIONS, LLC	WHEATON	VoIP	358	active
331-867	FRACTEL, LLC	YORKVILLE	VoIP	358	active
331-868			Landline		active
331-869			Landline		active
331-870			Landline		active
331-871	ONVOY, LLC	W CHICAGO	Landline	358	active
331-872			Landline		active
331-873			Landline		active
331-874			Landline		active
331-875			Landline		active
331-876			Landline		active
331-877			Landline		active
331-878			Landline		active
331-879			Landline		active
331-880			Landline		active
331-881			Landline		active
331-882			Landline		active
331-883			Landline		active
331-884			Landline		active
331-885			Landline		active
331-886			Landline		active
331-887			Landline		active
331-888	PEERLESS NETWORK OF ILLINOIS, LLC - IL	WARRENVL	Landline	358	active
331-889			Landline		active
331-890			Landline		active
331-891			Landline		active
331-892			Landline		active
331-893			Landline		active
331-894			Landline		active
331-895			Landline		active
331-896			Landline		active
331-897			Landline		active
331-898			Landline		active
331-899	FRACTEL, LLC	LOMBARD	VoIP	358	active
331-900	FRACTEL, LLC	ELMHURST	VoIP	358	active
331-901	BANDWIDTH.COM CLEC, LLC - IL	ST CHARLES	VoIP	358	active
331-902			Landline		active
331-903	AT&T ENTERPRISES, LLC	DOWNERSGRV	VoIP	358	active
331-904			Landline		active
331-905			Landline		active
331-906			Landline		active
331-907			Landline		active
331-908			Landline		active
331-909			Landline		active
331-910			Landline		active
331-912			Landline		active
331-913			Landline		active
331-914			Landline		active
331-915			Landline		active
331-916			Landline		active
331-917			Landline		active
331-918			Landline		active
331-919			Landline		active
331-920			Landline		active
331-921			Landline		active
331-922			Landline		active
331-923			Landline		active
331-924			Landline		active
331-925			Landline		active
331-926			Landline		active
331-927			Landline		active
331-928			Landline		active
331-929			Landline		active
331-930			Landline		active
331-931			Landline		active
331-932			Landline		active
331-933			Landline		active
331-934			Landline		active
331-935			Landline		active
331-936			Landline		active
331-937			Landline		active
331-938			Landline		active
331-939			Landline		active
331-940			Landline		active
331-941			Landline		active
331-942			Landline		active
331-943			Landline		active
331-944			Landline		active
331-945			Landline		active
331-946	FRACTEL, LLC	GLEN ELLYN	VoIP	358	active
331-947			Landline		active
331-948			Landline		active
331-949			Landline		active
331-951			Landline		active
331-952			Landline		active
331-953			Landline		active
331-954			Landline		active
331-955			Landline		active
331-956			Landline		active
331-957			Landline		active
331-960			Landline		active
331-961			Landline		active
331-962			Landline		active
331-963			Landline		active
331-964			Landline		active
331-965			Landline		active
331-966			Landline		active
331-967			Landline		active
331-968			Landline		active
331-969			Landline		active
331-970			Landline		active
331-971			Landline		active
331-972			Landline		active
331-973			Landline		active
331-974			Landline		active
331-975			Landline		active
331-977			Landline		active
331-978			Landline		active
331-979	COMCAST IP PHONE, LLC	ELMHURST	VoIP	358	active
331-980	T-MOBILE USA, INC.	AURORA	Wireless	358	active
331-981			Landline		active
331-982			Landline		active
331-983			Landline		active
331-984			Landline		active
331-985			Landline		active
331-986			Landline		active
331-987			Landline		active
331-988			Landline		active
331-989			Landline		active
331-990			Landline		active
331-991			Landline		active
331-992			Landline		active
331-993			Landline		active
331-994			Landline		active
331-995			Landline		active
331-996			Landline		active
331-997			Landline		active
331-998	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL	DOWNERSGRV	Wireless	358	active
331-999	BANDWIDTH.COM CLEC, LLC - IL	OSWEGO	VoIP	358	active

Area code 331 shares its geographic region with the following overlay area codes:

224 630 847

Area Code 331 — Chicago, Elgin, Riverdale, Illinois

Top Carriers

Rate Centers

Exchange Listings (NXX)

Related Area Codes