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
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-09-16 | 681-447 | 2XXX which blocks → | ARMSTRONG TELECOMMUNICATIONS, INC. - WV | 423C | CAIRO | WV |
| 2022-09-16 | 720-954 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO | 6567 | FORTLUPTON | CO |
| 2022-09-16 | 825-454 | not yet reported which blocks → | Videotron Ltd. | 787G | Calgary | — |
| 2022-09-16 | 825-758 | not yet reported which blocks → | Iristel Inc. | 154E | Vulcan | — |
| 2022-09-16 | 825-949 | not yet reported which blocks → | Iristel Inc. | 154E | Spirit River | — |
| 2022-09-16 | 854-233 | 0–9 XXXall 10 · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | MYRTLE BCH | SC |
| 2022-09-16 | 873-682 | not yet reported which blocks → | Videotron Ltd. | 328F | Sherbrooke | — |
| 2022-09-16 | 901-686 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN | 6673 | MEMPHIS | TN |
| 2022-09-16 | 945-270 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | LEWISVILLE | TX |
| 2022-09-15 | 385-486 | 0–9 XXXall 10 · 5 holders which blocks → | NUSO, LLC | 732J | BOUNTIFUL | UT |
| 2022-09-15 | 438-365 | not yet reported which blocks → | Videotron Ltd. | 328F | Montreal | — |
| 2022-09-15 | 438-366 | not yet reported which blocks → | Videotron Ltd. | 328F | Montreal | — |
| 2022-09-15 | 463-388 | 0–9 XXXall 10 · 4 holders which blocks → | COMMIO, LLC | 939H | CARMEL | IN |
| 2022-09-15 | 520-659 | 0–9 XXXall 10 · 4 holders which blocks → | NUSO, LLC | 732J | NOGALES | AZ |
| 2022-09-15 | 628-321 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 628-322 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 628-323 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 628-324 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 628-325 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 628-326 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SNFC CNTRL | CA |
| 2022-09-15 | 651-551 | 0XXX1XXX2XXX3XXX4XXX5XXX9XXX · 3 holders which blocks → | COMMIO, LLC | 939H | STILLWATER | MN |
| 2022-09-15 | 667-566 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | COMMIO, LLC | 939H | STEVENSVL | MD |
| 2022-09-15 | 667-877 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | PIKESVILLE | MD |
| 2022-09-15 | 772-867 | 0–9 XXXall 10 · 3 holders which blocks → | COMMIO, LLC | 939H | PTST LUCIE | FL |
| 2022-09-15 | 825-757 | not yet reported which blocks → | Iristel Inc. | 154E | Veteran | — |
| 2022-09-15 | 872-319 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN04 | IL |
| 2022-09-15 | 959-238 | 0–9 XXXall 10 · 4 holders which blocks → | NUSO, LLC | 732J | PUTNAM | CT |
| 2022-09-15 | 971-436 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | GRESHAM | OR |
| 2022-09-15 | 986-233 | 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | NUSO, LLC | 732J | BLACKFOOT | ID |
| 2022-09-14 | 220-237 | 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 2 holders which blocks → | ONVOY, LLC - OH | 464C | WELLSTON | OH |
| 2022-09-14 | 223-298 | 0XXX1XXX2XXX7XXX8XXX9XXX · 2 holders which blocks → | COMCAST IP PHONE, LLC | 318J | HALIFAX | PA |
| 2022-09-14 | 321-451 | 0–9 XXXall 10 · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL | 6502 | COCOA | FL |
| 2022-09-14 | 424-478 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | BEVERLYHLS | CA |
| 2022-09-14 | 424-480 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | INGLEWOOD | CA |
| 2022-09-14 | 437-450 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2022-09-14 | 437-460 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2022-09-14 | 437-473 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2022-09-14 | 437-673 | not yet reported which blocks → | Videotron Ltd. | 787G | Toronto | — |
| 2022-09-14 | 438-574 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2022-09-14 | 448-209 | 0–9 XXXall 10 · 5 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | TALLAHASSE | FL |
| 2022-09-14 | 474-751 | not yet reported which blocks → | Bell Mobility | 6574 | Regina | — |
| 2022-09-14 | 506-289 | not yet reported which blocks → | Bell Mobility Aliant | 329A | Fredericton | — |
| 2022-09-14 | 581-467 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2022-09-14 | 612-514 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MN | 184D | TWINCITIES | MN |
| 2022-09-14 | 612-714 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - MN | 184D | TWINCITIES | MN |
| 2022-09-14 | 681-437 | 1XXX2XXX7XXX · 3 holders which blocks → | COMCAST IP PHONE, LLC | 318J | BEECHBTTOM | WV |
| 2022-09-14 | 682-393 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | WEATHERFD | TX |
| 2022-09-14 | 689-264 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | WOW! INTERNET, CABLE AND PHONE | 961J | WINDERMERE | FL |
| 2022-09-14 | 727-607 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - FL | 937C | CLEARWATER | FL |
| 2022-09-14 | 743-734 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - NC | 638E | LEXINGTON | NC |
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.