NumberResearchRecent prefix assignments
334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/27/2026
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
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Dec 2025
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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2015-09-25 | 587-575 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2015-09-25 | 618-600 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC | 224C | GRANITE CY | IL |
| 2015-09-25 | 646-880 | 0–9 XXXall 10 · 4 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - NY | 4006 | NWYRCYZN01 | NY |
| 2015-09-25 | 708-964 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHICAGOHTS | IL |
| 2015-09-25 | 720-749 | 0–9 XXXall 10 · 3 holders which blocks → | PEERLESS NETWORK OF COLORADO, LLC - CO | 278F | DENVER | CO |
| 2015-09-25 | 720-835 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | DENVER | CO |
| 2015-09-25 | 778-674 | not yet reported which blocks → | TELUS Mobility | 8301 | Nanaimo | — |
| 2015-09-25 | 805-513 | 0–9 XXXall 10 · 2 holders which blocks → | PEERLESS NETWORK OF CALIFORNIA, LLC - CA | 373F | OXNARD | CA |
| 2015-09-25 | 858-267 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | SNDG MRMS | CA |
| 2015-09-25 | 873-886 | not yet reported which blocks → | Fibernetics Corporation | 464D | Drummondville | — |
| 2015-09-25 | 916-755 | 0–9 XXXall 10 · 6 holders which blocks → | T-MOBILE USA, INC. | 6529 | RSVL MAIN | CA |
| 2015-09-25 | 939-233 | 0–9 XXXall 10 · 2 holders which blocks → | SUNCOM DBA T-MOBILE USA | 8645 | FAJARDO | PR |
| 2015-09-24 | 206-475 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | SEATTLE | WA |
| 2015-09-24 | 218-221 | 0–9 XXXall 10 · 3 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | DULUTH | MN |
| 2015-09-24 | 480-548 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - AZ | 7217 | PHOENIX | AZ |
| 2015-09-24 | 618-666 | 0–9 XXXall 10 · 7 holders which blocks → | ONVOY, LLC | 224C | COLLINSVL | IL |
| 2015-09-24 | 819-259 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Ottawa-Hull | — |
| 2015-09-24 | 873-330 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Luskville | — |
| 2015-09-24 | 873-331 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Maniwaki | — |
| 2015-09-24 | 873-332 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Montebello | — |
| 2015-09-24 | 873-333 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Papineauville | — |
| 2015-09-24 | 873-334 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Perkins | — |
| 2015-09-24 | 873-335 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Quyon | — |
| 2015-09-24 | 873-336 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | St-Pierre-de-Wakefield | — |
| 2015-09-24 | 873-337 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Thurso | — |
| 2015-09-24 | 873-338 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Wakefield | — |
| 2015-09-23 | 469-840 | 0–9 XXXall 10 · 5 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | ANNA | TX |
| 2015-09-23 | 470-699 | 0–9 XXXwhole prefix which blocks → | POWERTEL ATLANTA LICENSES, INC. | 7473 | WINDER | GA |
| 2015-09-23 | 762-221 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLC - GA | 067D | HEPHZIBAH | GA |
| 2015-09-23 | 819-928 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Gatineau | — |
| 2015-09-23 | 873-320 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Aylmer | — |
| 2015-09-23 | 873-321 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Bouchette | — |
| 2015-09-23 | 873-322 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Buckingham | — |
| 2015-09-23 | 873-323 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Chapeau | — |
| 2015-09-23 | 873-324 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Chelsea | — |
| 2015-09-23 | 873-325 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Fort-Coulonge | — |
| 2015-09-23 | 873-326 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Gracefield | — |
| 2015-09-23 | 873-327 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Grand-Remous | — |
| 2015-09-23 | 873-328 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Kazabazua | — |
| 2015-09-23 | 873-329 | not yet reported which blocks → | TekSavvy Solutions Inc | 548H | Low | — |
| 2015-09-23 | 910-909 | 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → | STARVISION, INC. - NC | 703H | GARLAND | NC |
| 2015-09-23 | 971-727 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | BEAVERTON | OR |
| 2015-09-23 | 979-401 | 0–9 XXXall 10 · 7 holders which blocks → | SOUTHWESTERN BELL | 9533 | BAY CITY | TX |
| 2015-09-22 | 202-597 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DC | 6402 | WSHNGTNZN1 | DC |
| 2015-09-22 | 219-516 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | E CHICAGO | IN |
| 2015-09-22 | 240-760 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD | 6395 | WSHNGTNZN2 | MD |
| 2015-09-22 | 302-603 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - DE | 6393 | CAMDEN | DE |
| 2015-09-22 | 312-885 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN01 | IL |
| 2015-09-22 | 323-612 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 04 | CA |
| 2015-09-22 | 343-261 | not yet reported which blocks → | TELUS Mobility | 8303 | Belleville | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/27/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.