Recent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026
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.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2020-05-11 | 226-554 | not yet reported which blocks → | Fibernetics Corporation | 464D | Hillsburgh | — |
| 2020-05-11 | 226-612 | not yet reported which blocks → | Fibernetics Corporation | 464D | Caledon | — |
| 2020-05-11 | 226-613 | not yet reported which blocks → | Fibernetics Corporation | 464D | Elora | — |
| 2020-05-11 | 226-614 | not yet reported which blocks → | Fibernetics Corporation | 464D | Erin | — |
| 2020-05-11 | 226-615 | not yet reported which blocks → | Fibernetics Corporation | 464D | Shelburne | — |
| 2020-05-11 | 234-272 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | ROGERS | OH |
| 2020-05-11 | 234-273 | 0XXX1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - OH | 001F | LEETONIA | OH |
| 2020-05-11 | 365-747 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Brampton | — |
| 2020-05-11 | 434-998 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - VA | 138E | APPOMATTOX | VA |
| 2020-05-11 | 506-973 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Moncton | — |
| 2020-05-11 | 520-479 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | TUCSON | AZ |
| 2020-05-11 | 540-202 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - VA | 138E | THE PLAINS | VA |
| 2020-05-11 | 571-520 | 0–9 XXXwhole prefix which blocks → | ONVOY, LLC - VA | 138E | HERNDON | VA |
| 2020-05-11 | 571-771 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - VA | 138E | WSNGTNZN08 | VA |
| 2020-05-11 | 657-437 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | HUNTITNBCH | CA |
| 2020-05-11 | 657-488 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SANTA ANA | CA |
| 2020-05-11 | 659-569 | 0XXX1XXX5XXX7XXX8XXX · 3 holders which blocks → | ONVOY, LLC - AL | 604E | LYNN | AL |
| 2020-05-11 | 659-596 | 0XXX3XXX4XXX5XXX · 2 holders which blocks → | ONVOY, LLC - AL | 604E | NEEDHAM | AL |
| 2020-05-11 | 719-509 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ONVOY, LLC - CO | 026D | TRINIDAD | CO |
| 2020-05-11 | 720-734 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CO | 026D | DENVER | CO |
| 2020-05-11 | 725-234 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NV | 075F | INDIAN SPG | NV |
| 2020-05-11 | 775-454 | 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → | ONVOY, LLC - NV | 029F | BEATTY | NV |
| 2020-05-11 | 775-456 | 1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → | ONVOY, LLC - NV | 029F | EMPIRE | NV |
| 2020-05-11 | 804-534 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - VA | 138E | HEATHSVL | VA |
| 2020-05-11 | 845-801 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | MIDDLETOWN | NY |
| 2020-05-11 | 928-360 | 0XXX1XXX · 2 holders which blocks → | COMMNET WIRELESS, LLC | 5736 | CHINLE | AZ |
| 2020-05-08 | 240-995 | 1XXX2XXX3XXX5XXX6XXX7XXX · 3 holders which blocks → | ONVOY, LLC - MD | 876D | FLINTSTONE | MD |
| 2020-05-08 | 276-246 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - VA | 138E | BIGSTONEGP | VA |
| 2020-05-08 | 339-300 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | COHASSET | MA |
| 2020-05-08 | 339-356 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | HULL | MA |
| 2020-05-08 | 339-400 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | SAUGUS | MA |
| 2020-05-08 | 339-529 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | WHITMAN | MA |
| 2020-05-08 | 351-400 | 0XXX2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | FRACTEL, LLC | 965H | ESSEX | MA |
| 2020-05-08 | 351-500 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | LOWELL | MA |
| 2020-05-08 | 351-529 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | MERRIMAC | MA |
| 2020-05-08 | 351-600 | 0–9 XXXall 10 · 5 holders which blocks → | FRACTEL, LLC | 965H | PEABODY | MA |
| 2020-05-08 | 351-800 | 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | FRACTEL, LLC | 965H | WINCHENDON | MA |
| 2020-05-08 | 351-900 | 0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | FRACTEL, LLC | 965H | IPSWICH | MA |
| 2020-05-08 | 571-998 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - VA | 138E | INDENDNTHL | VA |
| 2020-05-08 | 602-693 | 0–9 XXXall 10 · 3 holders which blocks → | HD CARRIER LLC | 321J | PHOENIX | AZ |
| 2020-05-08 | 707-831 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | BANDWIDTH.COM CLEC, LLC - CA | 981E | CLERLAOAKS | CA |
| 2020-05-08 | 737-825 | 0–9 XXXall 10 · 5 holders which blocks → | TON80 COMMUNICATIONS, LLC | 516J | AUSTIN | TX |
| 2020-05-08 | 757-780 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - VA | 138E | CHUCKATUCK | VA |
| 2020-05-08 | 757-799 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - VA | 138E | NRFOLKZON3 | VA |
| 2020-05-08 | 857-465 | 0–9 XXXall 10 · 4 holders which blocks → | FRACTEL, LLC | 965H | BOSTON | MA |
| 2020-05-07 | 272-242 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | JERMYN | PA |
| 2020-05-07 | 307-770 | 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | ALL WEST/WYOMING, INC. | 3880 | FARSON | WY |
| 2020-05-07 | 437-444 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Toronto | — |
| 2020-05-07 | 437-666 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Toronto | — |
| 2020-05-07 | 484-750 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - PA | 4007 | ALLENTOWN | PA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.