NumberResearchRecent prefix assignments
375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026
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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May 2026
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Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
Quick find in this area code:
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2017-05-26 | 343-535 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Cumberland | — |
| 2017-05-26 | 343-536 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Navan | — |
| 2017-05-26 | 343-537 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Pakenham | — |
| 2017-05-26 | 343-538 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Russell | — |
| 2017-05-26 | 343-539 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | South Mountain | — |
| 2017-05-26 | 365-656 | not yet reported which blocks → | Iristel Inc. | 154E | Streetsville | — |
| 2017-05-26 | 365-657 | not yet reported which blocks → | Iristel Inc. | 154E | Hamilton | — |
| 2017-05-26 | 470-788 | 0–9 XXXall 10 · 4 holders which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | ATLANTA | GA |
| 2017-05-26 | 470-867 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | ATLANTA | GA |
| 2017-05-26 | 579-994 | not yet reported which blocks → | Iristel Inc. | 154E | Granby | — |
| 2017-05-26 | 587-843 | not yet reported which blocks → | Iristel Inc. | 154E | Vegreville | — |
| 2017-05-26 | 613-367 | not yet reported which blocks → | Iristel Inc. | 154E | Ottawa-Hull | — |
| 2017-05-26 | 626-206 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | COVINA | CA |
| 2017-05-26 | 629-867 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | NASHVILLE | TN |
| 2017-05-26 | 807-797 | not yet reported which blocks → | Iristel Inc. | 154E | Fort Frances | — |
| 2017-05-26 | 850-604 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRONTIER COMMUNICATIONS OF THE SOUTH, LLC - FL | 4465 | MOLINO | FL |
| 2017-05-26 | 865-867 | 0–9 XXXall 10 · 6 holders which blocks → | COMMIO, LLC | 939H | KNOXVILLE | TN |
| 2017-05-26 | 912-867 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | SAVANNAH | GA |
| 2017-05-26 | 914-229 | 0–9 XXXall 10 · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | WSCHSTZN03 | NY |
| 2017-05-25 | 249-504 | not yet reported which blocks → | Iristel Inc. | 154E | Peterborough | — |
| 2017-05-25 | 343-520 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Alfred | — |
| 2017-05-25 | 343-521 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Almonte | — |
| 2017-05-25 | 343-522 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Bourget | — |
| 2017-05-25 | 343-523 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Casselman | — |
| 2017-05-25 | 343-524 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Chesterville | — |
| 2017-05-25 | 343-525 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Embrun | — |
| 2017-05-25 | 343-526 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Gloucester | — |
| 2017-05-25 | 343-527 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Merrickville | — |
| 2017-05-25 | 343-528 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Orleans | — |
| 2017-05-25 | 346-261 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PORTER | TX |
| 2017-05-25 | 470-626 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA | GA |
| 2017-05-25 | 479-241 | 0XXX2XXX · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | ST PAUL | AR |
| 2017-05-25 | 581-706 | not yet reported which blocks → | Iristel Inc. | 154E | Quebec | — |
| 2017-05-25 | 587-735 | not yet reported which blocks → | TELUS | 8084 | Edmonton | — |
| 2017-05-25 | 605-250 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - SD | 162G | SIOUX FLS | SD |
| 2017-05-25 | 609-940 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | TRENTON | NJ |
| 2017-05-25 | 669-544 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA | 7240 | SNJS NORTH | CA |
| 2017-05-25 | 720-586 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | DENVER | CO |
| 2017-05-25 | 907-313 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AK | 9413 | ANCHORAGE | AK |
| 2017-05-25 | 940-204 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - TX | 903C | SANTO | TX |
| 2017-05-25 | 940-236 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - TX | 903C | ST JO | TX |
| 2017-05-24 | 226-908 | not yet reported which blocks → | Iristel Inc. | 154E | Owen Sound | — |
| 2017-05-24 | 236-801 | not yet reported which blocks → | Iristel Inc. | 154E | Duncan | — |
| 2017-05-24 | 430-230 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - TX | 903C | AVERY | TX |
| 2017-05-24 | 431-304 | not yet reported which blocks → | Iristel Inc. | 154E | Portage La Prairie | — |
| 2017-05-24 | 479-210 | 0XXX1XXX2XXX · 3 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - AR | 5179 | DRAKES CRK | AR |
| 2017-05-24 | 506-306 | not yet reported which blocks → | Iristel Inc. | 154E | Edmundston | — |
| 2017-05-24 | 778-561 | not yet reported which blocks → | Iristel Inc. | 154E | Victoria | — |
| 2017-05-24 | 778-562 | not yet reported which blocks → | Iristel Inc. | 154E | Victoria | — |
| 2017-05-24 | 848-212 | 0–9 XXXall 10 · 5 holders which blocks → | METROPCS, INC. | 5562 | WOODBRIDGE | NJ |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.