MICHIGAN BELL TEL CO
244 prefixes in 313 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 313-535 | DETROITZN5 | 9323 | — | — |
| 313-537 | DETROITZN5 | 9323 | — | — |
| 313-538 | DETROITZN5 | 9323 | — | — |
| 313-541 | DETROITZN5 | 9323 | — | — |
| 313-543 | DETROITZN5 | 9323 | — | Yes |
| 313-545 | DETROITZN1 | 9323 | 2013-10-24 | Yes |
| 313-551 | DETROITZN6 | 9323 | — | Yes |
| 313-553 | DETROITZN1 | 9323 | — | — |
| 313-554 | DETROITZN6 | 9323 | — | Yes |
| 313-556 | DETROITZN1 | 9323 | — | Yes |
| 313-560 | DETROITZN5 | 9323 | — | — |
| 313-561 | DETROITZN6 | 9323 | — | — |
| 313-562 | DETROITZN6 | 9323 | — | — |
| 313-563 | DETROITZN6 | 9323 | — | — |
| 313-564 | DETROITZN3 | 9323 | — | Yes |
| 313-565 | DETROITZN6 | 9323 | — | — |
| 313-566 | DETROITZN1 | 9323 | — | Yes |
| 313-567 | DETROITZN1 | 9323 | — | — |
| 313-568 | DETROITZN1 | 9323 | — | — |
| 313-571 | DETROITZN2 | 9323 | — | Yes |
| 313-576 | DETROITZN1 | 9323 | — | Yes |
| 313-577 | DETROITZN1 | 9323 | — | — |
| 313-578 | DETROITZN1 | 9323 | — | Yes |
| 313-579 | DETROITZN2 | 9323 | — | Yes |
| 313-581 | DETROITZN6 | 9323 | — | — |
| 313-582 | DETROITZN6 | 9323 | — | — |
| 313-583 | DETROITZN6 | 9323 | — | Yes |
| 313-584 | DETROITZN6 | 9323 | — | — |
| 313-592 | DETROITZN5 | 9323 | — | — |
| 313-593 | DETROITZN6 | 9323 | — | — |
| 313-594 | DETROITZN6 | 9323 | — | — |
| 313-596 | DETROITZN1 | 9323 | — | — |
| 313-599 | DETROITZN5 | 9323 | — | — |
| 313-602 | DETROITZN5 | 9323 | — | — |
| 313-619 | DETROITZN6 | 9323 | — | — |
| 313-621 | DETROITZN6 | 9323 | — | — |
| 313-624 | DETROITZN6 | 9323 | — | Yes |
| 313-628 | DETROITZN1 | 9323 | — | — |
| 313-640 | DETROITZN2 | 9323 | — | Yes |
| 313-642 | DETROITZN2 | 9323 | — | Yes |
| 313-647 | DETROITZN2 | 9323 | — | Yes |
| 313-653 | DETROITZN4 | 9323 | — | Yes |
| 313-656 | DETROITZN1 | 9323 | — | Yes |
| 313-659 | DETROITZN4 | 9323 | — | Yes |
| 313-664 | DETROITZN1 | 9323 | — | — |
| 313-665 | DETROITZN1 | 9323 | — | — |
| 313-667 | DETROITZN1 | 9323 | — | — |
| 313-722 | DETROITZN6 | 9323 | — | Yes |
| 313-724 | DETROITZN6 | 9323 | — | Yes |
| 313-730 | DETROITZN6 | 9323 | — | Yes |
| 313-745 | DETROITZN1 | 9323 | — | — |
| 313-755 | DETROITZN6 | 9323 | — | — |
| 313-758 | DETROITZN1 | 9323 | 2001-05-25 | Yes |
| 313-760 | DETROITZN1 | 9323 | — | — |
| 313-772 | DETROITZN4 | 9323 | — | Yes |
| 313-780 | DETROITZN5 | 9323 | — | — |
| 313-782 | DETROITZN1 | 9323 | 2012-06-22 | Yes |
| 313-786 | DETROITZN5 | 9323 | — | — |
| 313-791 | DETROITZN6 | 9323 | — | Yes |
| 313-792 | DETROITZN6 | 9323 | — | — |
| 313-794 | DETROITZN5 | 9323 | — | Yes |
| 313-821 | DETROITZN2 | 9323 | — | Yes |
| 313-822 | DETROITZN2 | 9323 | — | — |
| 313-823 | DETROITZN2 | 9323 | — | Yes |
| 313-824 | DETROITZN2 | 9323 | — | Yes |
| 313-831 | DETROITZN1 | 9323 | — | Yes |
| 313-832 | DETROITZN1 | 9323 | — | — |
| 313-833 | DETROITZN1 | 9323 | — | — |
| 313-834 | DETROITZN4 | 9323 | — | — |
| 313-835 | DETROITZN4 | 9323 | — | — |
| 313-836 | DETROITZN4 | 9323 | — | — |
| 313-837 | DETROITZN4 | 9323 | — | — |
| 313-838 | DETROITZN4 | 9323 | — | — |
| 313-839 | DETROITZN2 | 9323 | — | — |
| 313-841 | DETROITZN6 | 9323 | — | — |
| 313-842 | DETROITZN6 | 9323 | — | — |
| 313-843 | DETROITZN6 | 9323 | — | — |
| 313-845 | DETROITZN6 | 9323 | — | — |
| 313-846 | DETROITZN6 | 9323 | — | — |
| 313-849 | DETROITZN6 | 9323 | — | — |
| 313-852 | DETROITZN3 | 9323 | — | — |
| 313-861 | DETROITZN4 | 9323 | — | — |
| 313-862 | DETROITZN4 | 9323 | — | — |
| 313-863 | DETROITZN4 | 9323 | — | — |
| 313-864 | DETROITZN4 | 9323 | — | — |
| 313-865 | DETROITZN3 | 9323 | — | — |
| 313-866 | DETROITZN3 | 9323 | — | — |
| 313-867 | DETROITZN3 | 9323 | — | — |
| 313-868 | DETROITZN3 | 9323 | — | — |
| 313-869 | DETROITZN3 | 9323 | — | — |
| 313-870 | DETROITZN1 | 9323 | — | Yes |
| 313-871 | DETROITZN1 | 9323 | — | — |
| 313-872 | DETROITZN1 | 9323 | — | Yes |
| 313-873 | DETROITZN1 | 9323 | — | — |
| 313-874 | DETROITZN1 | 9323 | — | — |
| 313-875 | DETROITZN1 | 9323 | — | — |
| 313-876 | DETROITZN1 | 9323 | — | — |
| 313-877 | DETROITZN1 | 9323 | — | Yes |
| 313-881 | DETROITZN2 | 9323 | — | — |
| 313-882 | DETROITZN2 | 9323 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.