NumberResearchRecent prefix assignments
341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
Most active assignees, last 30 days
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| — | 306-957 | not yet reported which blocks → | SaskTel | 8091 | Odessa | — |
| — | 306-961 | not yet reported which blocks → | SaskTel Mobility | 9868 | Prince Albert | — |
| — | 306-962 | not yet reported which blocks → | SaskTel | 8091 | Eston | — |
| — | 306-963 | not yet reported which blocks → | SaskTel | 8091 | Imperial | — |
| — | 306-964 | not yet reported which blocks → | SaskTel | 8091 | Saskatoon | — |
| — | 306-965 | not yet reported which blocks → | SaskTel | 8091 | Kindersley | — |
| — | 306-966 | not yet reported which blocks → | SaskTel | 8091 | Saskatoon | — |
| — | 306-967 | not yet reported which blocks → | SaskTel | 8091 | Kindersley | — |
| — | 306-968 | not yet reported which blocks → | SaskTel | 8091 | Kindersley | — |
| — | 306-969 | not yet reported which blocks → | SaskTel | 8091 | Radville | — |
| — | 306-975 | not yet reported which blocks → | SaskTel | 8091 | Saskatoon | — |
| — | 306-978 | not yet reported which blocks → | SaskTel | 8091 | Saskatoon | — |
| — | 306-981 | not yet reported which blocks → | SaskTel Mobility | 9868 | Prince Albert | — |
| — | 306-982 | not yet reported which blocks → | SaskTel | 8091 | Christopher Lake | — |
| — | 306-984 | not yet reported which blocks → | SaskTel | 8091 | Leoville | — |
| — | 306-989 | not yet reported which blocks → | SaskTel | 8091 | Paddockwood | — |
| — | 306-995 | not yet reported which blocks → | SaskTel | 8091 | Regina | — |
| — | 306-997 | not yet reported which blocks → | SaskTel | 8091 | Borden | — |
| — | 307-208 | not yet reported which blocks → | WY | |||
| — | 307-211 | not yet reported which blocks → | MULTIPLE OCN LISTING | MULT | XXXXXXXXXX | WY |
| — | 307-220 | 4XXX5XXX6XXX9XXX which blocks → | T-MOBILE USA, INC. | 6529 | CHEYENNE | WY |
| — | 307-221 | 8XXX which blocks → | T-MOBILE USA, INC. | 6529 | CHEYENNE | WY |
| — | 307-222 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CHEYENNE | WY |
| — | 307-223 | 1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | LARAMIE | WY |
| — | 307-224 | 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WY | 9416 | CASPER | WY |
| — | 307-227 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - WY | 450F | MAMMOTH | WY |
| — | 307-231 | 7XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | PINEDALE | WY |
| — | 307-232 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-233 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-234 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-235 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-237 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-240 | 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | RIVERTON | WY |
| — | 307-241 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | WHEATLAND | WY |
| — | 307-242 | 1XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → | QWEST CORPORATION | 9636 | LAKE | WY |
| — | 307-243 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - WY | 450F | CASPER | WY |
| — | 307-245 | not yet reported which blocks → | RT COMMUNICATIONS | 3410 | PINEBLUFFS | WY |
| — | 307-246 | not yet reported which blocks → | RT COMMUNICATIONS | 3410 | ALBIN | WY |
| — | 307-247 | 6XXX7XXX8XXX9XXX · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASPER | WY |
| — | 307-250 | 9XXX which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CODY | WY |
| — | 307-252 | not yet reported which blocks → | UINTAH BASIN ELECTRONIC TELECOMMUNICATIONS | 1772 | ROCK SPG | WY |
| — | 307-258 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| — | 307-259 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| — | 307-260 | not yet reported which blocks → | UNION TELEPHONE COMPANY | 013B | BIG PINEY | WY |
| — | 307-261 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-262 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WY | 6566 | CASPER | WY |
| — | 307-265 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-266 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
| — | 307-267 | none assigned yet which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | CASPER | WY |
| — | 307-268 | not yet reported which blocks → | QWEST CORPORATION | 9636 | CASPER | WY |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.