NumberResearchRecent prefix assignments
337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026
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
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Mar 2026
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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2021-12-02 | 782-808 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Stewiacke | — |
| 2021-12-02 | 782-809 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Truro | — |
| 2021-12-02 | 906-351 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → | NUSO, LLC | 478J | MARQUETTE | MI |
| 2021-12-02 | 912-641 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - GA | 983E | LYONS | GA |
| 2021-12-02 | 920-873 | 0–9 XXXall 10 · 8 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | GREEN BAY | WI |
| 2021-12-02 | 949-227 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | IRVINE | CA |
| 2021-12-01 | 252-554 | 0XXX1XXX4XXX8XXX9XXX · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | WELDON | NC |
| 2021-12-01 | 680-229 | 6XXX9XXX · 2 holders which blocks → | BOOST SUBSCRIBERCO L.L.C. | 490J | ONTARIO | NY |
| 2021-11-30 | 249-632 | not yet reported which blocks → | Fibernetics Corporation | 464D | Kirkfield | — |
| 2021-11-30 | 249-634 | not yet reported which blocks → | Fibernetics Corporation | 464D | Oakwood | — |
| 2021-11-30 | 249-635 | not yet reported which blocks → | Fibernetics Corporation | 464D | Woodville | — |
| 2021-11-30 | 254-480 | 0XXX1XXX2XXX3XXX8XXX · 4 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | WACO | TX |
| 2021-11-30 | 361-895 | 0–9 XXXall 10 · 3 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | C CHRISTI | TX |
| 2021-11-30 | 618-810 | 0–9 XXXwhole prefix which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HERRIN | IL |
| 2021-11-30 | 618-813 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTRALIA | IL |
| 2021-11-30 | 782-508 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Debert | — |
| 2021-11-30 | 782-509 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Hantsport | — |
| 2021-11-30 | 782-551 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Kennetcook | — |
| 2021-11-30 | 782-552 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Liverpool | — |
| 2021-11-30 | 782-623 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lunenburg | — |
| 2021-11-30 | 782-624 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | New Ross | — |
| 2021-11-30 | 782-625 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Noel | — |
| 2021-11-30 | 858-533 | 0–9 XXXall 10 · 5 holders which blocks → | FRACTEL, LLC | 965H | HARBSNALPN | CA |
| 2021-11-30 | 930-228 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | NEW ALBANY | IN |
| 2021-11-29 | 249-630 | not yet reported which blocks → | Fibernetics Corporation | 464D | Cameron | — |
| 2021-11-29 | 249-631 | not yet reported which blocks → | Fibernetics Corporation | 464D | Dunsford | — |
| 2021-11-29 | 743-241 | 0–9 XXXall 10 · 7 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - NC | 8389 | BURLINGTON | NC |
| 2021-11-29 | 782-300 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Brookfield | — |
| 2021-11-29 | 782-301 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Caledonia | — |
| 2021-11-29 | 782-365 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chester | — |
| 2021-11-29 | 782-366 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Collingwood | — |
| 2021-11-26 | 249-316 | not yet reported which blocks → | Bell Canada | 8051 | Fort Albany | — |
| 2021-11-26 | 782-205 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Advocate | — |
| 2021-11-26 | 782-206 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Amherst | — |
| 2021-11-26 | 782-207 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Bridgewater | — |
| 2021-11-26 | 873-831 | not yet reported which blocks → | Cooptel | 818D | Ham-Nord | — |
| 2021-11-25 | 639-308 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-25 | 639-557 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-25 | 639-566 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-25 | 639-598 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-25 | 639-599 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-25 | 639-966 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Moose Jaw | — |
| 2021-11-24 | 252-369 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | SWNSBRWCAR | NC |
| 2021-11-24 | 313-504 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2021-11-24 | 346-532 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - TX | 903C | CLEVELAND | TX |
| 2021-11-24 | 364-895 | 8XXX which blocks → | TWILIO INTERNATIONAL, INC. | 506J | MADISONVL | KY |
| 2021-11-24 | 435-270 | 0XXX1XXX4XXX · 2 holders which blocks → | E. FIBER SAN JUAN, LLC | 832J | BLANDING | UT |
| 2021-11-24 | 435-298 | 8XXX which blocks → | E. FIBER SAN JUAN, LLC | 832J | MONTICELLO | UT |
| 2021-11-24 | 478-895 | 0–9 XXXall 10 · 3 holders which blocks → | TWILIO INTERNATIONAL, INC. | 506J | MACON | GA |
| 2021-11-24 | 480-764 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AZ | 3285 | PHOENIX | AZ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.