NumberResearchRecent prefix assignments
354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026
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 |
|---|---|---|---|---|---|---|
| 2022-09-02 | 551-357 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - NJ | 637C | OAKLAND | NJ |
| 2022-09-02 | 551-359 | 0–9 XXXall 10 · 4 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | JERSEYCITY | NJ |
| 2022-09-02 | 559-807 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | FRESNO | CA |
| 2022-09-02 | 563-341 | 0–9 XXXall 10 · 5 holders which blocks → | UNITED STATES CELLULAR - IA | 6266 | DUBUQUE | IA |
| 2022-09-02 | 571-564 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN19 | VA |
| 2022-09-02 | 571-579 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSNGTNZN08 | VA |
| 2022-09-02 | 571-580 | 0–9 XXXall 10 · 4 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | OCCOQUAN | VA |
| 2022-09-02 | 571-751 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - VA | 138E | ARCOLA | VA |
| 2022-09-02 | 640-231 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NJ | 637C | BARNEGAT | NJ |
| 2022-09-02 | 640-232 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NJ | 637C | BURLINGTON | NJ |
| 2022-09-02 | 640-233 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - NJ | 637C | MERCERVL | NJ |
| 2022-09-02 | 650-715 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CA | 649C | SAN MATEO | CA |
| 2022-09-02 | 651-498 | 0XXX1XXX3XXX8XXX · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | STILLWATER | MN |
| 2022-09-02 | 661-594 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | SHAFTER | CA |
| 2022-09-02 | 672-703 | not yet reported which blocks → | Iristel Inc. | 154E | Cranbrook | — |
| 2022-09-02 | 682-390 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | ARLINGTON | TX |
| 2022-09-02 | 682-391 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | ARLINGTON | TX |
| 2022-09-02 | 682-392 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | ARLINGTON | TX |
| 2022-09-02 | 737-331 | 0XXX1XXX2XXX8XXX · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | DALE/LTNSP | TX |
| 2022-09-02 | 743-273 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - NC | 638E | BURLINGTON | NC |
| 2022-09-02 | 743-337 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - NC | 638E | ASHEBORO | NC |
| 2022-09-02 | 743-767 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - NC | 638E | GIBSONVL | NC |
| 2022-09-02 | 747-745 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7139 | NORTHRIDGE | CA |
| 2022-09-02 | 819-584 | not yet reported which blocks → | Cooptel | 818D | St-Adolphe-de-Dudswell | — |
| 2022-09-02 | 830-371 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TX | 903C | MARBLE FLS | TX |
| 2022-09-02 | 839-269 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - SC | 548E | LANCASTER | SC |
| 2022-09-02 | 839-569 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | BARNWELL | SC |
| 2022-09-02 | 840-217 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | FONTANA | CA |
| 2022-09-02 | 848-334 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | METUCHEN | NJ |
| 2022-09-02 | 848-335 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - NJ | 637C | JAMESBURG | NJ |
| 2022-09-02 | 856-387 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - NJ | 637C | WOODBURY | NJ |
| 2022-09-02 | 856-416 | 0–9 XXXall 10 · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | VINELAND | NJ |
| 2022-09-02 | 878-262 | 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - PA | 547E | MARS | PA |
| 2022-09-02 | 908-215 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - NJ | 637C | ELIZABETH | NJ |
| 2022-09-02 | 908-270 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX · 2 holders which blocks → | ONVOY, LLC - NJ | 637C | HAMPTON | NJ |
| 2022-09-02 | 908-562 | 3XXX4XXX5XXX6XXX which blocks → | ONVOY, LLC - NJ | 637C | HIGHBRIDGE | NJ |
| 2022-09-02 | 951-613 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | PERRIS | CA |
| 2022-09-02 | 951-615 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | SUN CITY | CA |
| 2022-09-02 | 984-348 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - NC | 638E | HILLSBORGH | NC |
| 2022-09-02 | 984-468 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - NC | 638E | WAKEFOREST | NC |
| 2022-09-01 | 229-652 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - GA | 067D | TIFTON | GA |
| 2022-09-01 | 229-692 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - GA | 067D | THOMASVL | GA |
| 2022-09-01 | 240-960 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | WSHNGTNZN4 | MD |
| 2022-09-01 | 249-422 | not yet reported which blocks → | Distributel | 082E | Bracebridge | — |
| 2022-09-01 | 249-423 | not yet reported which blocks → | Distributel | 082E | Gravenhurst | — |
| 2022-09-01 | 249-432 | not yet reported which blocks → | Distributel | 082E | Honey Harbour | — |
| 2022-09-01 | 249-435 | not yet reported which blocks → | Distributel | 082E | Huntsville | — |
| 2022-09-01 | 249-436 | not yet reported which blocks → | Distributel | 082E | Port Carling | — |
| 2022-09-01 | 249-445 | not yet reported which blocks → | Distributel | 082E | Attawapiskat | — |
| 2022-09-01 | 251-567 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 2 holders which blocks → | ONVOY, LLC - AL | 604E | MCINTOSH | AL |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.