PORTLAND — MI
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| 123.NET, LLC | 2550 | 1 |
| ACD TELECOM, INC. - MI | 3535 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |