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Operating Company Number (OCN): 2550
Carriers are telecom operating companies that own number blocks (NPA-NXX). A number showing this carrier does not guarantee the caller is that company — scam calls can spoof caller ID.
| State | NPA | NXX | Rate center | Open |
|---|---|---|---|---|
| MI | 231 | 220 | MUSKEGON | Prefix |
| MI | 231 | 440 | BALDWIN | Prefix |
| MI | 231 | 441 | FIFE LAKE | Prefix |
| MI | 231 | 488 | MANISTEE | Prefix |
| MI | 231 | 520 | CHARLEVOIX | Prefix |
| MI | 231 | 538 | FREMONT | Prefix |
| MI | 231 | 583 | LUDINGTON | Prefix |
| MI | 231 | 635 | MACKINAWCY | Prefix |
| MI | 231 | 636 | HOWARDCITY | Prefix |
| MI | 231 | 639 | BEULAH | Prefix |
| MI | 231 | 643 | MORLEY | Prefix |
| MI | 231 | 656 | KALKASKA | Prefix |
| MI | 231 | 660 | BIG RAPIDS | Prefix |
| MI | 231 | 686 | FRANKFORT | Prefix |
| MI | 231 | 721 | HART | Prefix |
| MI | 231 | 776 | PETOSKEY | Prefix |
| MI | 231 | 778 | TRAVERSECY | Prefix |
| MI | 231 | 782 | CHEBOYGAN | Prefix |
| MI | 231 | 792 | MANCELONA | Prefix |
| MI | 231 | 806 | CORAL | Prefix |
| MI | 231 | 808 | CENTRAL LK | Prefix |
| MI | 231 | 836 | EVART | Prefix |
| MI | 231 | 842 | CADILLAC | Prefix |
| MI | 231 | 874 | WOLVERINE | Prefix |
| MI | 231 | 899 | NORTHPORT | Prefix |
| MI | 231 | 908 | MCBAIN | Prefix |
| MI | 231 | 925 | SCOTTVILLE | Prefix |
| MI | 231 | 974 | GRANT | Prefix |
| MI | 248 | 228 | SOUTHFIELD | Prefix |
| MI | 248 | 247 | TROY | Prefix |
| MI | 248 | 621 | SOUTHFIELD | Prefix |
| MI | 248 | 633 | BIRMINGHAM | Prefix |
| MI | 248 | 724 | PONTIAC | Prefix |
| MI | 248 | 776 | ROYAL OAK | Prefix |
| MI | 248 | 793 | ORTONVILLE | Prefix |
| MI | 269 | 315 | VICKSBURG | Prefix |
| MI | 269 | 680 | PLAINWELL | Prefix |
| MI | 517 | 544 | JACKSON | Prefix |
| MI | 517 | 584 | ALBION | Prefix |
| MI | 517 | 609 | JONESVILLE | Prefix |
| MI | 517 | 642 | MUNITH | Prefix |
| MI | 517 | 679 | LANSING | Prefix |
| MI | 517 | 682 | BLISSFIELD | Prefix |
| MI | 517 | 701 | CLINTON | Prefix |
| MI | 517 | 732 | PORTLAND | Prefix |
| MI | 517 | 736 | COLDWATER | Prefix |
| MI | 517 | 762 | DANSVILLE | Prefix |
| MI | 517 | 785 | ONONDAGA | Prefix |
| MI | 517 | 828 | HILLSDALE | Prefix |
| MI | 517 | 873 | CHARLOTTE | Prefix |
| MI | 517 | 992 | WILLIAMSTN | Prefix |
| MI | 586 | 354 | WARREN | Prefix |
| MI | 616 | 212 | HOLLAND | Prefix |
| MI | 616 | 608 | GRAND RPDS | Prefix |
| MI | 734 | 245 | LIVONIA | Prefix |
| MI | 734 | 588 | WILLIS | Prefix |
| MI | 810 | 267 | LAPEER | Prefix |
| MI | 810 | 315 | DRYDEN | Prefix |
| MI | 810 | 371 | CAPAC | Prefix |
| MI | 810 | 375 | DRYDEN | Prefix |
| MI | 810 | 390 | FENTON | Prefix |
| MI | 810 | 426 | MARINECITY | Prefix |
| MI | 810 | 442 | DECKERVL | Prefix |
| MI | 810 | 512 | ALGONAC | Prefix |
| MI | 810 | 699 | APPLEGATE | Prefix |
| MI | 810 | 827 | EMMETT | Prefix |
| MI | 810 | 901 | SANDUSKY | Prefix |
| MI | 810 | 991 | HARTLAND | Prefix |
| MI | 906 | 232 | MARQUETTE | Prefix |
| MI | 906 | 828 | IRON MT | Prefix |
| MI | 989 | 229 | CLARE | Prefix |
| MI | 989 | 278 | ALPENA | Prefix |
| MI | 989 | 281 | ROSCOMMON | Prefix |
| MI | 989 | 283 | STANTON | Prefix |
| MI | 989 | 322 | BAY CITY | Prefix |
| MI | 989 | 374 | MIDLAND | Prefix |
| MI | 989 | 388 | ITHACA | Prefix |
| MI | 989 | 394 | BEAVERTON | Prefix |
| MI | 989 | 410 | BAD AXE | Prefix |
| MI | 989 | 437 | STANDISH | Prefix |
| MI | 989 | 472 | OWOSSO | Prefix |
| MI | 989 | 530 | AKRON | Prefix |
| MI | 989 | 568 | ASHLEY | Prefix |
| MI | 989 | 571 | VASSAR | Prefix |
| MI | 989 | 596 | SAGINAW | Prefix |
| MI | 989 | 605 | AUBURN | Prefix |
| MI | 989 | 719 | CLIFFORD | Prefix |
| MI | 989 | 861 | OSCODA | Prefix |
| MI | 989 | 896 | WESTBRANCH | Prefix |
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