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
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 |
|---|---|---|---|---|---|---|
| 2015-09-28 | 346-309 | 0–9 XXXall 10 · 4 holders which blocks → | COMCAST IP PHONE, LLC | 318J | SUGAR LAND | TX |
| 2015-09-28 | 385-272 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT | 6571 | SALT LAKE | UT |
| 2015-09-28 | 431-334 | not yet reported which blocks → | Bell Mobility | 6574 | Winnipeg | — |
| 2015-09-28 | 563-331 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks → | UNITED STATES CELLULAR - IA | 6266 | TIPTON | IA |
| 2015-09-28 | 579-790 | not yet reported which blocks → | Iristel Inc. | 154E | Valleyfield | — |
| 2015-09-28 | 585-498 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF NEW YORK, LLC - NY | 155E | ROCHESTER | NY |
| 2015-09-28 | 585-536 | 0–9 XXXall 10 · 6 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | BATAVIA | NY |
| 2015-09-28 | 585-664 | 0–9 XXXall 10 · 6 holders which blocks → | METROPCS, INC. | 5562 | BATAVIA | NY |
| 2015-09-28 | 587-385 | not yet reported which blocks → | Bell Mobility | 6574 | Edmonton | — |
| 2015-09-28 | 587-488 | not yet reported which blocks → | TELUS | 8084 | Edmonton | — |
| 2015-09-28 | 616-236 | 0–9 XXXall 10 · 6 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | GREENVILLE | MI |
| 2015-09-28 | 616-377 | 0–9 XXXall 10 · 7 holders which blocks → | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | HOLLAND | MI |
| 2015-09-28 | 623-745 | 0–9 XXXall 10 · 4 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | PHOENIX | AZ |
| 2015-09-28 | 647-323 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2015-09-28 | 647-552 | not yet reported which blocks → | Bell Mobility | 6574 | Toronto | — |
| 2015-09-28 | 705-809 | not yet reported which blocks → | Iristel Inc. | 154E | Haliburton | — |
| 2015-09-28 | 709-431 | not yet reported which blocks → | Bell Mobility Aliant | 329A | Gander | — |
| 2015-09-28 | 719-819 | 0–9 XXXall 10 · 2 holders which blocks → | WIDE VOICE, LLC - CO | 557H | COLORDOSPG | CO |
| 2015-09-28 | 720-820 | 0–9 XXXall 10 · 2 holders which blocks → | WIDE VOICE, LLC - CO | 557H | DENVER | CO |
| 2015-09-28 | 734-400 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLCV - MI | 543C | YPSILANTI | MI |
| 2015-09-28 | 734-800 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLCV - MI | 543C | ANN ARBOR | MI |
| 2015-09-28 | 806-507 | 0–9 XXXall 10 · 6 holders which blocks → | CENTURYLINK COMMUNICATIONS, LLC | 508J | LUBBOCK | TX |
| 2015-09-28 | 806-899 | not yet reported which blocks → | AMA COMM., LLC DBA AMA*TECHTEL COMMUNICATIONS-TX | 0132 | ESTELLINE | TX |
| 2015-09-28 | 845-630 | 0–9 XXXall 10 · 4 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | CARMEL | NY |
| 2015-09-28 | 848-247 | 0–9 XXXall 10 · 7 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NJ | 6623 | METUCHEN | NJ |
| 2015-09-28 | 854-777 | 0–9 XXXall 10 · 2 holders which blocks → | ONVOY, LLC - SC | 548E | ISLE PALMS | SC |
| 2015-09-28 | 854-888 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - SC | 548E | SUMMERVL | SC |
| 2015-09-28 | 873-803 | not yet reported which blocks → | Iristel Inc. | 154E | Ste-Agathe | — |
| 2015-09-28 | 916-210 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7145 | SCRM MAIN | CA |
| 2015-09-28 | 916-461 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | FOLSOM | CA |
| 2015-09-28 | 929-394 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS, INC. - NY | 6622 | NWYRCYZN13 | NY |
| 2015-09-28 | 949-327 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | SADLBK VLY | CA |
| 2015-09-28 | 949-564 | 0–9 XXXwhole prefix which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA | 6006 | IRVINE | CA |
| 2015-09-28 | 989-888 | 0–9 XXXall 10 · 5 holders which blocks → | ONVOY, LLCV - MI | 543C | REESE | MI |
| 2015-09-25 | 206-492 | 0–9 XXXall 10 · 5 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | SEATTLE | WA |
| 2015-09-25 | 206-960 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | SEATTLE | WA |
| 2015-09-25 | 210-672 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF TEXAS, LLC - TX | 177F | SANANTONIO | TX |
| 2015-09-25 | 213-372 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | LSAN DA 01 | CA |
| 2015-09-25 | 249-889 | not yet reported which blocks → | Fibernetics Corporation | 464D | Sault Ste. Marie | — |
| 2015-09-25 | 256-888 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - AL | 604E | GURLEY | AL |
| 2015-09-25 | 312-549 | 0–9 XXXall 10 · 3 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | CHICGOZN01 | IL |
| 2015-09-25 | 343-881 | not yet reported which blocks → | Fibernetics Corporation | 464D | Smiths Falls | — |
| 2015-09-25 | 360-726 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | VANCOUVER | WA |
| 2015-09-25 | 505-389 | 0–9 XXXall 10 · 5 holders which blocks → | PEERLESS NETWORK OF NEW MEXICO, LLC - NM | 377H | ALBUQURQUE | NM |
| 2015-09-25 | 509-960 | 0–9 XXXall 10 · 6 holders which blocks → | ONVOY, LLC - WA | 483E | SPOKANE | WA |
| 2015-09-25 | 510-422 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | OKLD FRTVL | CA |
| 2015-09-25 | 579-887 | not yet reported which blocks → | Fibernetics Corporation | 464D | St-Jerome | — |
| 2015-09-25 | 587-572 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2015-09-25 | 587-573 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
| 2015-09-25 | 587-574 | not yet reported which blocks → | TELUS Mobility | 8301 | Calgary | — |
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.