NumberResearchRecent prefix assignments
358 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
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 |
|---|---|---|---|---|---|---|
| 2012-10-31 | 803-717 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - SC | 077F | SHAWAFBHTS | SC |
| 2012-10-31 | 832-760 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2012-10-31 | 862-305 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NJ | 118F | DOVER | NJ |
| 2012-10-31 | 873-887 | not yet reported which blocks → | Fibernetics Corporation | 464D | Trois-Rivieres | — |
| 2012-10-30 | 226-450 | not yet reported which blocks → | Videotron Ltd. | 383F | Brantford | — |
| 2012-10-30 | 239-201 | 0–9 XXXall 10 · 3 holders which blocks → | NUSO, LLC | 551G | FORT MYERS | FL |
| 2012-10-30 | 541-213 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | BEND | OR |
| 2012-10-30 | 618-221 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | BREESE | IL |
| 2012-10-30 | 708-315 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | LA GRANGE | IL |
| 2012-10-30 | 814-616 | 0–9 XXXall 10 · 5 holders which blocks → | NUSO, LLC | 551G | ERIE | PA |
| 2012-10-30 | 850-405 | 0–9 XXXall 10 · 4 holders which blocks → | NUSO, LLC | 551G | TALLAHASSE | FL |
| 2012-10-29 | 267-559 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | PHLDLPHZN1 | PA |
| 2012-10-29 | 352-609 | 1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | TAVARES | FL |
| 2012-10-29 | 385-474 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - UT | 3231 | MURRAY | UT |
| 2012-10-29 | 438-383 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montreal | — |
| 2012-10-29 | 438-384 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montreal | — |
| 2012-10-29 | 438-385 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montreal | — |
| 2012-10-29 | 438-386 | not yet reported which blocks → | Videotron Ltd. | 8306 | Montreal | — |
| 2012-10-29 | 450-486 | not yet reported which blocks → | Videotron Ltd. | 8306 | St-Lambert | — |
| 2012-10-29 | 450-490 | not yet reported which blocks → | Videotron Ltd. | 8306 | Pont-Viau | — |
| 2012-10-29 | 450-527 | not yet reported which blocks → | Videotron Ltd. | 8306 | Beloeil | — |
| 2012-10-29 | 786-520 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | NORTH DADE | FL |
| 2012-10-29 | 808-439 | 0–9 XXXall 10 · 6 holders which blocks → | HAWAII DIALOGIX TELECOM, LLC | 844F | HONOLULU | HI |
| 2012-10-29 | 956-269 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | LAREDO | TX |
| 2012-10-28 | 315-728 | 0–9 XXXall 10 · 6 holders which blocks → | NUSO, LLC | 551G | SYRACUSE | NY |
| 2012-10-28 | 516-210 | 0–9 XXXall 10 · 5 holders which blocks → | CABLEVISION LIGHTPATH, INC. - NY | 7126 | NASSAUZN07 | NY |
| 2012-10-28 | 518-407 | 0–9 XXXall 10 · 5 holders which blocks → | NUSO, LLC | 551G | ALBANY | NY |
| 2012-10-26 | 724-221 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | GREENSBURG | PA |
| 2012-10-26 | 763-762 | 0–9 XXXall 10 · 6 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 4139 | TWINCITIES | MN |
| 2012-10-26 | 873-274 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Minerve | — |
| 2012-10-26 | 873-275 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Arundel | — |
| 2012-10-26 | 873-276 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Val David | — |
| 2012-10-26 | 873-277 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Donat-de-Montcalm | — |
| 2012-10-26 | 873-278 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Adolphe-D'Howard | — |
| 2012-10-26 | 873-279 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Jovite | — |
| 2012-10-26 | 873-280 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | St-Faustin | — |
| 2012-10-26 | 873-281 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ste-Agathe | — |
| 2012-10-26 | 873-282 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Nominingue | — |
| 2012-10-26 | 873-283 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | L'Annonciation | — |
| 2012-10-26 | 873-284 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Labelle | — |
| 2012-10-26 | 904-515 | 0–9 XXXall 10 · 5 holders which blocks → | NUSO, LLC | 551G | JACKSONVL | FL |
| 2012-10-26 | 914-342 | 0XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → | ONVOY, LLC- NY | 384C | CROTON FLS | NY |
| 2012-10-25 | 276-582 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - VA | 079F | HONAKER | VA |
| 2012-10-25 | 331-281 | 0–9 XXXall 10 · 3 holders which blocks → | ILLINOIS BELL TEL CO | 9329 | NAPERVILLE | IL |
| 2012-10-25 | 587-951 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Red Deer | — |
| 2012-10-25 | 587-953 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Nisku | — |
| 2012-10-25 | 587-954 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Leduc | — |
| 2012-10-25 | 587-957 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Sherwood Park | — |
| 2012-10-25 | 587-960 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Fort McMurray | — |
| 2012-10-25 | 778-313 | not yet reported which blocks → | Zayo Canada Inc. | 8304 | Kelowna | — |
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.