Area Code 738 — Ontario, California – TelecomRouting

Reference Data

Area Code Directory

Area Code 738 — Ontario, California

Active

Data last updated: June 25, 2026

State

California

Country

Timezone

America/Los_Angeles

Assigned

September 8, 2025

Exchanges (NXX)

786

Carriers

Rate Centers

Overlay

Yes — 213, 323

Top Carriers

Carrier	OCN	NXX Count
ONVOY, LLC - CA	649C	9
WIDE VOICE, LLC - CA	252F	4
T-MOBILE USA, INC.	6529	2
EXIANT COMMUNICATIONS LLC	114J	1
8X8, INC.	193E	1
OPENTACT INC.	824J	1

Rate Centers

LSAN DA 10 LSAN DA 07 LSAN DA 04 LSAN DA 13 LSAN DA 06 MONTEBELLO LSAN DA 12 LSAN DA 03 LSAN DA 01 LSAN DA 05 LSAN DA 02

Exchange Listings (NXX)

NPA-NXX	Carrier	Rate Center	Type	LATA	Status
738-200	T-MOBILE USA, INC.	LSAN DA 10	Landline		active
738-201	ONVOY, LLC - CA	LSAN DA 07	Landline		active
738-202	T-MOBILE USA, INC.	LSAN DA 04	Landline		active
738-203	ONVOY, LLC - CA	LSAN DA 13	Landline		active
738-204			Landline		active
738-205			Landline		active
738-206			Landline		active
738-207			Landline		active
738-208			Landline		active
738-209			Landline		active
738-210			Landline		active
738-212			Landline		active
738-213			Landline		active
738-214			Landline		active
738-215			Landline		active
738-216			Landline		active
738-217			Landline		active
738-218			Landline		active
738-219			Landline		active
738-220			Landline		active
738-221			Landline		active
738-222	ONVOY, LLC - CA	LSAN DA 06	Landline		active
738-223			Landline		active
738-224			Landline		active
738-225			Landline		active
738-226			Landline		active
738-227			Landline		active
738-228			Landline		active
738-229			Landline		active
738-230			Landline		active
738-231			Landline		active
738-232			Landline		active
738-233			Landline		active
738-234			Landline		active
738-235			Landline		active
738-236			Landline		active
738-237			Landline		active
738-238			Landline		active
738-239			Landline		active
738-240			Landline		active
738-241			Landline		active
738-242			Landline		active
738-243			Landline		active
738-244			Landline		active
738-245			Landline		active
738-246			Landline		active
738-247			Landline		active
738-248			Landline		active
738-249			Landline		active
738-250			Landline		active
738-251			Landline		active
738-252			Landline		active
738-253			Landline		active
738-254			Landline		active
738-255			Landline		active
738-256			Landline		active
738-257			Landline		active
738-258			Landline		active
738-259			Landline		active
738-260			Landline		active
738-261			Landline		active
738-262			Landline		active
738-263			Landline		active
738-264			Landline		active
738-265			Landline		active
738-266			Landline		active
738-267			Landline		active
738-268			Landline		active
738-269			Landline		active
738-270			Landline		active
738-271			Landline		active
738-272			Landline		active
738-273			Landline		active
738-274			Landline		active
738-275			Landline		active
738-276			Landline		active
738-277			Landline		active
738-278			Landline		active
738-279			Landline		active
738-280			Landline		active
738-281			Landline		active
738-282			Landline		active
738-283			Landline		active
738-284			Landline		active
738-285			Landline		active
738-286			Landline		active
738-287			Landline		active
738-288			Landline		active
738-289			Landline		active
738-290			Landline		active
738-291			Landline		active
738-292			Landline		active
738-293			Landline		active
738-294			Landline		active
738-295			Landline		active
738-296			Landline		active
738-297			Landline		active
738-298			Landline		active
738-299			Landline		active
738-300	OPENTACT INC.	LSAN DA 06	Landline		active
738-301			Landline		active
738-302			Landline		active
738-303			Landline		active
738-304			Landline		active
738-305			Landline		active
738-306			Landline		active
738-307			Landline		active
738-308			Landline		active
738-309			Landline		active
738-310			Landline		active
738-312			Landline		active
738-313			Landline		active
738-314			Landline		active
738-315			Landline		active
738-316			Landline		active
738-317			Landline		active
738-318			Landline		active
738-319			Landline		active
738-320			Landline		active
738-321			Landline		active
738-322			Landline		active
738-323			Landline		active
738-324			Landline		active
738-325			Landline		active
738-326			Landline		active
738-327			Landline		active
738-328			Landline		active
738-329			Landline		active
738-330			Landline		active
738-331			Landline		active
738-332			Landline		active
738-333	WIDE VOICE, LLC - CA	MONTEBELLO	Landline		active
738-334			Landline		active
738-335			Landline		active
738-336			Landline		active
738-337			Landline		active
738-338			Landline		active
738-339			Landline		active
738-340			Landline		active
738-341			Landline		active
738-342			Landline		active
738-343			Landline		active
738-344			Landline		active
738-345			Landline		active
738-346			Landline		active
738-347			Landline		active
738-348			Landline		active
738-349			Landline		active
738-350			Landline		active
738-351			Landline		active
738-352			Landline		active
738-353			Landline		active
738-354			Landline		active
738-355			Landline		active
738-356			Landline		active
738-357			Landline		active
738-358			Landline		active
738-359			Landline		active
738-360			Landline		active
738-361			Landline		active
738-362			Landline		active
738-363			Landline		active
738-364			Landline		active
738-365			Landline		active
738-366			Landline		active
738-367			Landline		active
738-368			Landline		active
738-369			Landline		active
738-370			Landline		active
738-371			Landline		active
738-372			Landline		active
738-373			Landline		active
738-374			Landline		active
738-375			Landline		active
738-376			Landline		active
738-377			Landline		active
738-378			Landline		active
738-379			Landline		active
738-380			Landline		active
738-381			Landline		active
738-382			Landline		active
738-383			Landline		active
738-384			Landline		active
738-385			Landline		active
738-386			Landline		active
738-387			Landline		active
738-388			Landline		active
738-389			Landline		active
738-390			Landline		active
738-391			Landline		active
738-392			Landline		active
738-393			Landline		active
738-394			Landline		active
738-395			Landline		active
738-396			Landline		active
738-397			Landline		active
738-398			Landline		active
738-399			Landline		active
738-400			Landline		active
738-401			Landline		active
738-402			Landline		active
738-403			Landline		active
738-404			Landline		active
738-405			Landline		active
738-406			Landline		active
738-407			Landline		active
738-408			Landline		active
738-409			Landline		active
738-410			Landline		active
738-412			Landline		active
738-413			Landline		active
738-414			Landline		active
738-415			Landline		active
738-416			Landline		active
738-417			Landline		active
738-418			Landline		active
738-419			Landline		active
738-420			Landline		active
738-421			Landline		active
738-422			Landline		active
738-423			Landline		active
738-424			Landline		active
738-425			Landline		active
738-426			Landline		active
738-427			Landline		active
738-428			Landline		active
738-429			Landline		active
738-430			Landline		active
738-431			Landline		active
738-432			Landline		active
738-433			Landline		active
738-434			Landline		active
738-435			Landline		active
738-436			Landline		active
738-437			Landline		active
738-438			Landline		active
738-439			Landline		active
738-440			Landline		active
738-441			Landline		active
738-442			Landline		active
738-443			Landline		active
738-444	ONVOY, LLC - CA	LSAN DA 12	Landline		active
738-445			Landline		active
738-446			Landline		active
738-447			Landline		active
738-448			Landline		active
738-449			Landline		active
738-450			Landline		active
738-451			Landline		active
738-452			Landline		active
738-453			Landline		active
738-454			Landline		active
738-455			Landline		active
738-456			Landline		active
738-457			Landline		active
738-458			Landline		active
738-459			Landline		active
738-460			Landline		active
738-461			Landline		active
738-462			Landline		active
738-463			Landline		active
738-464			Landline		active
738-465			Landline		active
738-466			Landline		active
738-467			Landline		active
738-468			Landline		active
738-469			Landline		active
738-470			Landline		active
738-471			Landline		active
738-472			Landline		active
738-473			Landline		active
738-474			Landline		active
738-475			Landline		active
738-476			Landline		active
738-477			Landline		active
738-478			Landline		active
738-479			Landline		active
738-480			Landline		active
738-481			Landline		active
738-482			Landline		active
738-483			Landline		active
738-484			Landline		active
738-485			Landline		active
738-486			Landline		active
738-487			Landline		active
738-488			Landline		active
738-489			Landline		active
738-490			Landline		active
738-491			Landline		active
738-492			Landline		active
738-493			Landline		active
738-494			Landline		active
738-495			Landline		active
738-496			Landline		active
738-497			Landline		active
738-498			Landline		active
738-499			Landline		active
738-500			Landline		active
738-501			Landline		active
738-502			Landline		active
738-503			Landline		active
738-504			Landline		active
738-505			Landline		active
738-506			Landline		active
738-507			Landline		active
738-508			Landline		active
738-509			Landline		active
738-510			Landline		active
738-512			Landline		active
738-513			Landline		active
738-514			Landline		active
738-515			Landline		active
738-516			Landline		active
738-517			Landline		active
738-518			Landline		active
738-519			Landline		active
738-520			Landline		active
738-521			Landline		active
738-522			Landline		active
738-523			Landline		active
738-524			Landline		active
738-525			Landline		active
738-526			Landline		active
738-527			Landline		active
738-528			Landline		active
738-529	ONVOY, LLC - CA	LSAN DA 03	Landline		active
738-530			Landline		active
738-531			Landline		active
738-532			Landline		active
738-533			Landline		active
738-534			Landline		active
738-535			Landline		active
738-536			Landline		active
738-537			Landline		active
738-538			Landline		active
738-539			Landline		active
738-540			Landline		active
738-541			Landline		active
738-542			Landline		active
738-543			Landline		active
738-544			Landline		active
738-545			Landline		active
738-546			Landline		active
738-547			Landline		active
738-548			Landline		active
738-549			Landline		active
738-550			Landline		active
738-551			Landline		active
738-552			Landline		active
738-553			Landline		active
738-554			Landline		active
738-556			Landline		active
738-557			Landline		active
738-558			Landline		active
738-559			Landline		active
738-560			Landline		active
738-561			Landline		active
738-562			Landline		active
738-563			Landline		active
738-564			Landline		active
738-565			Landline		active
738-566			Landline		active
738-567			Landline		active
738-568			Landline		active
738-569			Landline		active
738-570			Landline		active
738-571			Landline		active
738-572			Landline		active
738-573			Landline		active
738-574			Landline		active
738-575			Landline		active
738-576			Landline		active
738-577			Landline		active
738-578			Landline		active
738-579			Landline		active
738-580			Landline		active
738-581			Landline		active
738-582			Landline		active
738-583			Landline		active
738-584			Landline		active
738-585			Landline		active
738-586			Landline		active
738-587			Landline		active
738-588			Landline		active
738-589			Landline		active
738-590			Landline		active
738-591			Landline		active
738-592			Landline		active
738-593			Landline		active
738-594			Landline		active
738-595			Landline		active
738-596			Landline		active
738-597			Landline		active
738-598			Landline		active
738-599			Landline		active
738-600			Landline		active
738-601			Landline		active
738-602			Landline		active
738-603			Landline		active
738-604			Landline		active
738-605			Landline		active
738-606			Landline		active
738-607			Landline		active
738-608			Landline		active
738-609			Landline		active
738-610			Landline		active
738-612			Landline		active
738-613			Landline		active
738-614			Landline		active
738-615			Landline		active
738-616			Landline		active
738-617			Landline		active
738-618			Landline		active
738-619			Landline		active
738-620			Landline		active
738-621			Landline		active
738-622			Landline		active
738-623			Landline		active
738-624			Landline		active
738-625			Landline		active
738-626			Landline		active
738-627			Landline		active
738-628			Landline		active
738-629			Landline		active
738-630			Landline		active
738-631			Landline		active
738-632			Landline		active
738-633			Landline		active
738-634			Landline		active
738-635			Landline		active
738-636			Landline		active
738-637			Landline		active
738-638			Landline		active
738-639			Landline		active
738-640			Landline		active
738-641			Landline		active
738-642			Landline		active
738-643			Landline		active
738-644			Landline		active
738-645			Landline		active
738-646			Landline		active
738-647			Landline		active
738-648			Landline		active
738-649			Landline		active
738-650			Landline		active
738-651			Landline		active
738-652			Landline		active
738-653			Landline		active
738-654			Landline		active
738-655			Landline		active
738-656			Landline		active
738-657			Landline		active
738-658			Landline		active
738-659			Landline		active
738-660			Landline		active
738-661			Landline		active
738-662			Landline		active
738-663			Landline		active
738-664			Landline		active
738-665			Landline		active
738-666	ONVOY, LLC - CA	MONTEBELLO	Landline		active
738-667			Landline		active
738-668			Landline		active
738-669			Landline		active
738-670			Landline		active
738-671			Landline		active
738-672			Landline		active
738-673			Landline		active
738-674			Landline		active
738-675			Landline		active
738-676			Landline		active
738-677			Landline		active
738-678			Landline		active
738-679			Landline		active
738-680			Landline		active
738-681			Landline		active
738-682			Landline		active
738-683			Landline		active
738-684			Landline		active
738-685			Landline		active
738-686			Landline		active
738-687			Landline		active
738-688			Landline		active
738-689			Landline		active
738-690			Landline		active
738-691			Landline		active
738-692			Landline		active
738-693			Landline		active
738-694			Landline		active
738-695			Landline		active
738-696			Landline		active
738-697			Landline		active
738-698			Landline		active
738-699			Landline		active
738-701			Landline		active
738-702			Landline		active
738-703			Landline		active
738-704			Landline		active
738-705			Landline		active
738-706			Landline		active
738-707			Landline		active
738-708			Landline		active
738-709			Landline		active
738-710			Landline		active
738-712			Landline		active
738-713			Landline		active
738-714			Landline		active
738-715			Landline		active
738-716			Landline		active
738-717			Landline		active
738-718			Landline		active
738-719			Landline		active
738-720			Landline		active
738-721			Landline		active
738-722			Landline		active
738-723			Landline		active
738-724			Landline		active
738-725			Landline		active
738-726			Landline		active
738-727			Landline		active
738-728			Landline		active
738-729			Landline		active
738-730			Landline		active
738-731			Landline		active
738-732			Landline		active
738-733			Landline		active
738-734			Landline		active
738-735			Landline		active
738-736			Landline		active
738-737			Landline		active
738-738	EXIANT COMMUNICATIONS LLC	LSAN DA 06	Landline		active
738-739			Landline		active
738-740			Landline		active
738-741			Landline		active
738-742			Landline		active
738-743			Landline		active
738-744			Landline		active
738-745			Landline		active
738-746			Landline		active
738-747			Landline		active
738-748			Landline		active
738-749			Landline		active
738-750			Landline		active
738-751			Landline		active
738-752			Landline		active
738-753			Landline		active
738-754			Landline		active
738-755			Landline		active
738-756			Landline		active
738-757			Landline		active
738-758			Landline		active
738-759			Landline		active
738-760			Landline		active
738-761			Landline		active
738-762			Landline		active
738-763			Landline		active
738-764			Landline		active
738-765			Landline		active
738-766			Landline		active
738-767			Landline		active
738-768			Landline		active
738-769			Landline		active
738-770			Landline		active
738-771			Landline		active
738-772			Landline		active
738-773			Landline		active
738-774			Landline		active
738-775			Landline		active
738-776			Landline		active
738-777	WIDE VOICE, LLC - CA	LSAN DA 01	Landline		active
738-778			Landline		active
738-779			Landline		active
738-780			Landline		active
738-781			Landline		active
738-782			Landline		active
738-783			Landline		active
738-784			Landline		active
738-785			Landline		active
738-786			Landline		active
738-787			Landline		active
738-788			Landline		active
738-789			Landline		active
738-790			Landline		active
738-791			Landline		active
738-792			Landline		active
738-793			Landline		active
738-794			Landline		active
738-795			Landline		active
738-796			Landline		active
738-797			Landline		active
738-798			Landline		active
738-799			Landline		active
738-800	ONVOY, LLC - CA	LSAN DA 04	Landline		active
738-801			Landline		active
738-802			Landline		active
738-803			Landline		active
738-804			Landline		active
738-805			Landline		active
738-806			Landline		active
738-807			Landline		active
738-808			Landline		active
738-809			Landline		active
738-810			Landline		active
738-812			Landline		active
738-813			Landline		active
738-814			Landline		active
738-815			Landline		active
738-816			Landline		active
738-817			Landline		active
738-818			Landline		active
738-819			Landline		active
738-820			Landline		active
738-821			Landline		active
738-822			Landline		active
738-823			Landline		active
738-824			Landline		active
738-825			Landline		active
738-826			Landline		active
738-827			Landline		active
738-828			Landline		active
738-829			Landline		active
738-830			Landline		active
738-831			Landline		active
738-832			Landline		active
738-833			Landline		active
738-834			Landline		active
738-835			Landline		active
738-836			Landline		active
738-837			Landline		active
738-838			Landline		active
738-839			Landline		active
738-840			Landline		active
738-841			Landline		active
738-842			Landline		active
738-843			Landline		active
738-844			Landline		active
738-845			Landline		active
738-846			Landline		active
738-847			Landline		active
738-848			Landline		active
738-849			Landline		active
738-850			Landline		active
738-851			Landline		active
738-852			Landline		active
738-853			Landline		active
738-854			Landline		active
738-855			Landline		active
738-856			Landline		active
738-857			Landline		active
738-858			Landline		active
738-859			Landline		active
738-860			Landline		active
738-861			Landline		active
738-862			Landline		active
738-863			Landline		active
738-864			Landline		active
738-865			Landline		active
738-866			Landline		active
738-867			Landline		active
738-868			Landline		active
738-869			Landline		active
738-870			Landline		active
738-871			Landline		active
738-872			Landline		active
738-873			Landline		active
738-874			Landline		active
738-875			Landline		active
738-876			Landline		active
738-877			Landline		active
738-878			Landline		active
738-879			Landline		active
738-880	8X8, INC.	LSAN DA 01	Landline		active
738-881			Landline		active
738-882			Landline		active
738-883			Landline		active
738-884			Landline		active
738-885			Landline		active
738-886			Landline		active
738-887			Landline		active
738-888	WIDE VOICE, LLC - CA	LSAN DA 06	Landline	730	active
738-889			Landline		active
738-890			Landline		active
738-891			Landline		active
738-892			Landline		active
738-893			Landline		active
738-894			Landline		active
738-895			Landline		active
738-896			Landline		active
738-897			Landline		active
738-898			Landline		active
738-899			Landline		active
738-900	ONVOY, LLC - CA	LSAN DA 05	Landline		active
738-901			Landline		active
738-902			Landline		active
738-903			Landline		active
738-904			Landline		active
738-905			Landline		active
738-906			Landline		active
738-907			Landline		active
738-908			Landline		active
738-909			Landline		active
738-910			Landline		active
738-912			Landline		active
738-913			Landline		active
738-914			Landline		active
738-915			Landline		active
738-916			Landline		active
738-917			Landline		active
738-918			Landline		active
738-919			Landline		active
738-920			Landline		active
738-921			Landline		active
738-922			Landline		active
738-923			Landline		active
738-924			Landline		active
738-925			Landline		active
738-926			Landline		active
738-927			Landline		active
738-928			Landline		active
738-929			Landline		active
738-930			Landline		active
738-931			Landline		active
738-932			Landline		active
738-933			Landline		active
738-934			Landline		active
738-935			Landline		active
738-936			Landline		active
738-937			Landline		active
738-938			Landline		active
738-939			Landline		active
738-940			Landline		active
738-941			Landline		active
738-942			Landline		active
738-943			Landline		active
738-944			Landline		active
738-945			Landline		active
738-946			Landline		active
738-947			Landline		active
738-948			Landline		active
738-949			Landline		active
738-951			Landline		active
738-952			Landline		active
738-953			Landline		active
738-954			Landline		active
738-955			Landline		active
738-956			Landline		active
738-957			Landline		active
738-960			Landline		active
738-961			Landline		active
738-962			Landline		active
738-963			Landline		active
738-964			Landline		active
738-965			Landline		active
738-966			Landline		active
738-967			Landline		active
738-968			Landline		active
738-969			Landline		active
738-970			Landline		active
738-971			Landline		active
738-972			Landline		active
738-973			Landline		active
738-974			Landline		active
738-975			Landline		active
738-977			Landline		active
738-978			Landline		active
738-979			Landline		active
738-980			Landline		active
738-981			Landline		active
738-982			Landline		active
738-983			Landline		active
738-984			Landline		active
738-985			Landline		active
738-986			Landline		active
738-987			Landline		active
738-988			Landline		active
738-989			Landline		active
738-990			Landline		active
738-991			Landline		active
738-992			Landline		active
738-993			Landline		active
738-994			Landline		active
738-995			Landline		active
738-996			Landline		active
738-997			Landline		active
738-998	ONVOY, LLC - CA	LSAN DA 02	Landline		active
738-999	WIDE VOICE, LLC - CA	LSAN DA 04	Landline		active

Area code 738 shares its geographic region with the following overlay area codes:

213 323

Area Code 738 — Ontario, California

Top Carriers

Rate Centers

Exchange Listings (NXX)

Related Area Codes