NumberResearchRecent prefix assignments
347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026
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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Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2017-02-02 | 579-373 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Sauveur | — |
| 2017-02-02 | 579-421 | not yet reported which blocks → | Videotron Ltd. | 328F | Longueuil | — |
| 2017-02-02 | 580-967 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | ADA | OK |
| 2017-02-02 | 701-963 | 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - ND | 999E | HATTON | ND |
| 2017-02-02 | 737-223 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7138 | AUSTIN | TX |
| 2017-02-02 | 857-895 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA | 6387 | BOSTON | MA |
| 2017-02-02 | 873-562 | not yet reported which blocks → | Videotron Ltd. | 328F | Rouyn-Noranda | — |
| 2017-02-02 | 873-664 | not yet reported which blocks → | Videotron Ltd. | 328F | Trois-Rivieres | — |
| 2017-02-02 | 873-665 | not yet reported which blocks → | Videotron Ltd. | 328F | Victoriaville | — |
| 2017-02-02 | 929-456 | 0–9 XXXall 10 · 5 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NWYRCYZN10 | NY |
| 2017-02-01 | 217-319 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHATHAM | IL |
| 2017-02-01 | 226-330 | not yet reported which blocks → | Distributel | 082E | London | — |
| 2017-02-01 | 226-417 | not yet reported which blocks → | Distributel | 082E | Guelph | — |
| 2017-02-01 | 251-385 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - AL | 604E | MOBILE | AL |
| 2017-02-01 | 334-490 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - AL | 072F | GREENSBORO | AL |
| 2017-02-01 | 343-417 | not yet reported which blocks → | Distributel | 082E | Ottawa-Hull | — |
| 2017-02-01 | 365-417 | not yet reported which blocks → | Distributel | 082E | Brampton | — |
| 2017-02-01 | 423-498 | 0–9 XXXall 10 · 4 holders which blocks → | ELECTRIC POWER BOARD OF CHATTANOOGA | 4645 | CHATTNOOGA | TN |
| 2017-02-01 | 470-512 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA | GA |
| 2017-02-01 | 470-557 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA NE | GA |
| 2017-02-01 | 618-417 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → | METROPCS, INC. | 5562 | MT VERNON | IL |
| 2017-02-01 | 647-417 | not yet reported which blocks → | Distributel | 082E | Toronto | — |
| 2017-02-01 | 740-640 | 0XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | BREMEN | OH |
| 2017-02-01 | 740-766 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → | ONVOY, LLC - OH | 464C | OSTRANDER | OH |
| 2017-02-01 | 778-357 | not yet reported which blocks → | Distributel | 081E | Vancouver | — |
| 2017-02-01 | 778-704 | not yet reported which blocks → | TELUS | 8086 | Chilliwack | — |
| 2017-02-01 | 778-752 | not yet reported which blocks → | TELUS | 8086 | Abbotsford | — |
| 2017-02-01 | 825-417 | not yet reported which blocks → | Distributel | 081E | Calgary | — |
| 2017-02-01 | 828-744 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | METROPCS, INC. | 5562 | FORESTCITY | NC |
| 2017-02-01 | 857-378 | 0–9 XXXall 10 · 5 holders which blocks → | VERIZON NEW ENGLAND INC. | 9102 | BOSTON | MA |
| 2017-01-31 | 414-253 | 0–9 XXXwhole prefix which blocks → | BANDWIDTH.COM CLEC, LLC - WI | 007F | MILWAUKZN1 | WI |
| 2017-01-31 | 470-376 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA NE | GA |
| 2017-01-31 | 470-551 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA NW | GA |
| 2017-01-31 | 470-859 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA | 6540 | ATLANTA NE | GA |
| 2017-01-31 | 539-212 | 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA OK - LLC | 530C | PAWHUSKA | OK |
| 2017-01-31 | 539-323 | 0–9 XXXall 10 · 2 holders which blocks → | NORTHEAST RURAL SERVICES, INC. - OK | 945H | VINITA | OK |
| 2017-01-31 | 579-369 | not yet reported which blocks → | Videotron Ltd. | 328F | Sorel | — |
| 2017-01-31 | 579-371 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Hyacinthe | — |
| 2017-01-31 | 579-372 | not yet reported which blocks → | Videotron Ltd. | 328F | St-Jean | — |
| 2017-01-31 | 579-420 | not yet reported which blocks → | Videotron Ltd. | 328F | Granby | — |
| 2017-01-31 | 579-961 | not yet reported which blocks → | Videotron Ltd. | 328F | Valleyfield | — |
| 2017-01-31 | 702-909 | 0–9 XXXall 10 · 2 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NV | 075F | LAS VEGAS | NV |
| 2017-01-31 | 717-710 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - PA | 6392 | HARISBGZN1 | PA |
| 2017-01-31 | 727-229 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - FL | 8300 | CLEARWATER | FL |
| 2017-01-31 | 778-630 | not yet reported which blocks → | TELUS | 8086 | Ladner | — |
| 2017-01-31 | 778-701 | not yet reported which blocks → | TELUS | 8086 | Ladner | — |
| 2017-01-31 | 816-613 | 0–9 XXXwhole prefix which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - MO | 6123 | KANSASCITY | MO |
| 2017-01-31 | 857-287 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | BOSTON | MA |
| 2017-01-31 | 873-560 | not yet reported which blocks → | Videotron Ltd. | 328F | Amos | — |
| 2017-01-31 | 873-561 | not yet reported which blocks → | Videotron Ltd. | 328F | Val-D'Or | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.