NumberResearchRecent prefix assignments
337 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
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May 2026
Apr 2026
Mar 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 |
|---|---|---|---|---|---|---|
| 2013-04-03 | 778-456 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Trail | — |
| 2013-04-03 | 778-457 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Rossland | — |
| 2013-04-03 | 778-459 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Fruitvale | — |
| 2013-04-03 | 778-461 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | North Nelson | — |
| 2013-04-03 | 778-463 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Nelson | — |
| 2013-04-03 | 778-529 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Balfour | — |
| 2013-04-03 | 778-530 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Genelle | — |
| 2013-04-03 | 940-219 | 1XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | THALIA | TX |
| 2013-04-02 | 431-231 | not yet reported which blocks → | MTS Inc. | 991B | Oxford House | — |
| 2013-04-02 | 431-232 | not yet reported which blocks → | MTS Inc. | 991B | Churchill | — |
| 2013-04-02 | 469-340 | 0–9 XXXall 10 · 4 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | GRANDPRARI | TX |
| 2013-04-02 | 469-530 | 0–9 XXXall 10 · 8 holders which blocks → | BANDWIDTH.COM CLEC, LLC - TX | 004F | DE SOTO | TX |
| 2013-04-02 | 573-554 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | COLUMBIA | MO |
| 2013-04-02 | 604-402 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Chilliwack | — |
| 2013-04-02 | 604-410 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Mission | — |
| 2013-04-02 | 604-705 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Sardis | — |
| 2013-04-02 | 604-776 | not yet reported which blocks → | Shaw Telecom Inc. | 497E | Abbotsford | — |
| 2013-04-02 | 720-525 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | DENVER | CO |
| 2013-04-02 | 720-724 | 0–9 XXXall 10 · 3 holders which blocks → | ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM | 3467 | DENVER | CO |
| 2013-04-02 | 813-510 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF FLORIDA, LLC - FL | 902E | TAMPAWST | FL |
| 2013-04-02 | 832-653 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | CYPRESS | TX |
| 2013-04-02 | 913-717 | 0–9 XXXall 10 · 3 holders which blocks → | EVERFAST FIBER NETWORKS LLC | 3915 | KANSASCITY | KS |
| 2013-04-02 | 941-417 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF FLORIDA, LLC - FL | 902E | PALMETTO | FL |
| 2013-04-01 | 424-296 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | CMTN CMTN | CA |
| 2013-04-01 | 646-686 | 0–9 XXXwhole prefix which blocks → | CABLEVISION LIGHTPATH, INC. - NY | 7126 | NWYRCYZN01 | NY |
| 2013-04-01 | 830-213 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EAGLE PASS | TX |
| 2013-04-01 | 903-609 | 0–9 XXXall 10 · 6 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PARIS | TX |
| 2013-04-01 | 914-351 | 0–9 XXXall 10 · 6 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY | 6959 | WSCHSTZN02 | NY |
| 2013-03-29 | 413-309 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | SPRINGFLD | MA |
| 2013-03-29 | 858-465 | 0–9 XXXall 10 · 8 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | DEL MAR | CA |
| 2013-03-29 | 864-407 | 0–9 XXXall 10 · 5 holders which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | GREENWOOD | SC |
| 2013-03-29 | 865-331 | 0–9 XXXwhole prefix which blocks → | BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL | 9419 | KNOXVILLE | TN |
| 2013-03-29 | 951-370 | 0–9 XXXall 10 · 5 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SUN CITY | CA |
| 2013-03-28 | 442-224 | 0–9 XXXall 10 · 6 holders which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | VISTA | CA |
| 2013-03-28 | 480-378 | 0–9 XXXall 10 · 3 holders which blocks → | LEVEL 3 TELECOM OF ARIZONA, LLC - AZ | 7552 | PHOENIX | AZ |
| 2013-03-28 | 581-430 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Chibougamau | — |
| 2013-03-28 | 607-298 | 0–9 XXXall 10 · 6 holders which blocks → | SERVICE ELECTRIC TELEPHONE COMPANY, LLC - NY | 932G | DEPOSIT | NY |
| 2013-03-28 | 613-515 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ottawa-Hull | — |
| 2013-03-28 | 639-471 | not yet reported which blocks → | SaskTel Mobility | 9868 | Saskatoon | — |
| 2013-03-28 | 705-407 | not yet reported which blocks → | NorthernTel Limited Partnership | 055H | Haileybury | — |
| 2013-03-28 | 705-412 | not yet reported which blocks → | NorthernTel Limited Partnership | 055H | South Porcupine | — |
| 2013-03-28 | 705-425 | not yet reported which blocks → | NorthernTel Limited Partnership | 055H | New Liskeard | — |
| 2013-03-28 | 705-620 | not yet reported which blocks → | NorthernTel Limited Partnership | 055H | Timmins | — |
| 2013-03-28 | 819-917 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Rouyn-Noranda | — |
| 2013-03-28 | 819-924 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Malartic | — |
| 2013-03-28 | 819-925 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Lebel-sur-Quevillon | — |
| 2013-03-28 | 819-940 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | La Sarre | — |
| 2013-03-28 | 819-945 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Cadillac | — |
| 2013-03-28 | 819-946 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Ville-Marie | — |
| 2013-03-28 | 819-952 | not yet reported which blocks → | ISP Telecom Inc. | 4727 | Senneterre | — |
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.