FRONTIER NORTH, INC. - MI
52 prefixes in 231 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 231-322 | TRCHRIVBDG | 0695 | — | Yes |
| 231-331 | ALDEN | 0695 | — | Yes |
| 231-377 | CLAM RIVER | 0695 | — | Yes |
| 231-533 | BELLAIRE | 0695 | — | Yes |
| 231-544 | CENTRAL LK | 0695 | — | Yes |
| 231-571 | MUSKEGON | 0695 | — | Yes |
| 231-588 | ELLSWORTH | 0695 | — | Yes |
| 231-599 | EASTPORT | 0695 | — | Yes |
| 231-646 | ELLSWORTH | 0695 | 2001-06-18 | Yes |
| 231-681 | FRUITPORT | 0695 | 2001-06-18 | Yes |
| 231-719 | MUSKEGON | 0695 | — | Yes |
| 231-720 | MUSKEGON | 0695 | — | Yes |
| 231-722 | MUSKEGON | 0695 | — | — |
| 231-724 | MUSKEGON | 0695 | — | Yes |
| 231-725 | MUSKEGON | 0695 | — | Yes |
| 231-726 | MUSKEGON | 0695 | — | Yes |
| 231-727 | MUSKEGON | 0695 | — | — |
| 231-728 | MUSKEGON | 0695 | — | — |
| 231-733 | MUSKEGON | 0695 | — | — |
| 231-736 | MUSKEGON | 0695 | — | Yes |
| 231-737 | MUSKEGON | 0695 | — | — |
| 231-739 | MUSKEGON | 0695 | — | — |
| 231-744 | MUSKEGON | 0695 | — | — |
| 231-747 | MUSKEGON | 0695 | — | Yes |
| 231-755 | MUSKEGON | 0695 | — | — |
| 231-759 | MUSKEGON | 0695 | — | — |
| 231-760 | MUSKEGON | 0695 | — | Yes |
| 231-766 | MUSKEGON | 0695 | — | Yes |
| 231-767 | MUSKEGON | 0695 | — | Yes |
| 231-769 | MUSKEGON | 0695 | — | Yes |
| 231-773 | MUSKEGON | 0695 | — | — |
| 231-777 | MUSKEGON | 0695 | — | — |
| 231-780 | MUSKEGON | 0695 | — | Yes |
| 231-788 | MUSKEGON | 0695 | — | Yes |
| 231-798 | MUSKEGON | 0695 | — | Yes |
| 231-799 | MUSKEGON | 0695 | — | Yes |
| 231-821 | HOLTON | 0695 | — | Yes |
| 231-823 | STANWOOD | 0695 | — | Yes |
| 231-828 | TWIN LAKE | 0695 | — | Yes |
| 231-830 | MUSKEGON | 0695 | — | Yes |
| 231-843 | LUDINGTON | 0695 | — | — |
| 231-845 | LUDINGTON | 0695 | — | — |
| 231-853 | RAVENNA | 0695 | — | Yes |
| 231-854 | HESPERIA | 0695 | — | — |
| 231-861 | SHELBY | 0695 | — | Yes |
| 231-865 | FRUITPORT | 0695 | — | Yes |
| 231-869 | PENTWATER | 0695 | — | Yes |
| 231-873 | HART | 0695 | — | — |
| 231-893 | WHITEHALL | 0695 | — | — |
| 231-894 | WHITEHALL | 0695 | — | Yes |
| 231-937 | HOWARDCITY | 0695 | — | Yes |
| 231-981 | WHITEHALL | 0695 | — | Yes |
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.