QWEST CORPORATION
83 prefixes in 307 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 307-232 | CASPER | 9636 | — | — |
| 307-233 | CASPER | 9636 | — | — |
| 307-234 | CASPER | 9636 | — | — |
| 307-235 | CASPER | 9636 | — | — |
| 307-237 | CASPER | 9636 | — | — |
| 307-242 | LAKE | 9636 | — | Yes |
| 307-253 | CASPER | 9636 | 2008-03-10 | Yes |
| 307-261 | CASPER | 9636 | — | — |
| 307-265 | CASPER | 9636 | — | — |
| 307-266 | CASPER | 9636 | — | — |
| 307-268 | CASPER | 9636 | — | — |
| 307-322 | WHEATLAND | 9636 | — | — |
| 307-324 | RAWLINS | 9636 | — | — |
| 307-328 | RAWLINS | 9636 | — | Yes |
| 307-332 | LANDER | 9636 | — | — |
| 307-334 | LUSK | 9636 | — | Yes |
| 307-335 | LANDER | 9636 | — | Yes |
| 307-344 | MAMMOTH | 9636 | — | Yes |
| 307-352 | ROCK SPG | 9636 | — | Yes |
| 307-358 | DOUGLAS | 9636 | — | — |
| 307-362 | ROCK SPG | 9636 | — | — |
| 307-382 | ROCK SPG | 9636 | — | — |
| 307-432 | CHEYENNE | 9636 | — | Yes |
| 307-433 | CHEYENNE | 9636 | — | Yes |
| 307-436 | GLENROCK | 9636 | — | — |
| 307-464 | WRIGHT | 9636 | — | Yes |
| 307-472 | CASPER | 9636 | — | — |
| 307-473 | CASPER | 9636 | — | Yes |
| 307-527 | CODY | 9636 | — | Yes |
| 307-543 | MORAN | 9636 | — | Yes |
| 307-545 | OLDFATHFUL | 9636 | — | Yes |
| 307-577 | CASPER | 9636 | — | — |
| 307-578 | CODY | 9636 | — | Yes |
| 307-587 | CODY | 9636 | — | — |
| 307-632 | CHEYENNE | 9636 | — | — |
| 307-633 | CHEYENNE | 9636 | — | Yes |
| 307-634 | CHEYENNE | 9636 | — | — |
| 307-635 | CHEYENNE | 9636 | — | — |
| 307-637 | CHEYENNE | 9636 | — | — |
| 307-638 | CHEYENNE | 9636 | — | — |
| 307-643 | WSPEARFISH | 9631 | — | — |
| 307-655 | SHERIDAN | 9636 | — | Yes |
| 307-672 | SHERIDAN | 9636 | — | — |
| 307-673 | SHERIDAN | 9636 | — | — |
| 307-674 | SHERIDAN | 9636 | — | — |
| 307-682 | GILLETTE | 9636 | — | — |
| 307-683 | SHERIDAN | 9636 | — | Yes |
| 307-684 | BUFFALO | 9636 | — | — |
| 307-685 | GILLETTE | 9636 | — | — |
| 307-686 | GILLETTE | 9636 | — | — |
| 307-687 | GILLETTE | 9636 | — | — |
| 307-688 | GILLETTE | 9636 | 2004-05-24 | — |
| 307-721 | LARAMIE | 9636 | — | — |
| 307-732 | JACKSON | 9636 | — | — |
| 307-733 | JACKSON | 9636 | — | — |
| 307-734 | JACKSON | 9636 | — | — |
| 307-735 | GLENDO | 9636 | — | Yes |
| 307-739 | JACKSON | 9636 | — | — |
| 307-742 | LARAMIE | 9636 | — | — |
| 307-745 | LARAMIE | 9636 | — | — |
| 307-754 | POWELL | 9636 | — | — |
| 307-755 | LARAMIE | 9636 | — | — |
| 307-766 | LARAMIE | 9636 | — | — |
| 307-771 | CHEYENNE | 9636 | — | — |
| 307-772 | CHEYENNE | 9636 | — | Yes |
| 307-773 | CHEYENNE | 9636 | — | — |
| 307-775 | CHEYENNE | 9636 | — | — |
| 307-777 | CHEYENNE | 9636 | — | — |
| 307-778 | CHEYENNE | 9636 | — | — |
| 307-783 | EVANSTON | 9636 | — | — |
| 307-789 | EVANSTON | 9636 | — | — |
| 307-828 | KEMMERER | 9636 | — | Yes |
| 307-849 | BORDER | 9636 | — | — |
| 307-855 | RIVERTON | 9636 | — | Yes |
| 307-856 | RIVERTON | 9636 | — | — |
| 307-857 | RIVERTON | 9636 | — | Yes |
| 307-872 | GREENRIVER | 9636 | — | — |
| 307-875 | GREENRIVER | 9636 | — | — |
| 307-877 | KEMMERER | 9636 | — | Yes |
| 307-886 | AFTON | 9636 | — | Yes |
| 307-896 | WBLLFOURCH | 9631 | — | — |
| 307-939 | WRIGHT | 9636 | — | Yes |
| 307-995 | CASPER | 9636 | — | 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.