NumberResearchRecent prefix assignments
358 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
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2005-07-01 | 717-405 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | LANCASTER | PA |
| 2005-07-01 | 845-891 | 0–9 XXXall 10 · 4 holders which blocks → | WARWICK VALLEY TELEPHONE COMPANY | 4967 | POUGHKEPSI | NY |
| 2005-06-30 | 204-272 | not yet reported which blocks → | GT Group Telecom Services Corp. | 8506 | Winnipeg | — |
| 2005-06-30 | 224-848 | 0XXX1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | BARRINGTON | IL |
| 2005-06-30 | 250-984 | not yet reported which blocks → | GT Group Telecom Services Corp. | 8506 | Victoria | — |
| 2005-06-30 | 502-407 | 0–9 XXXall 10 · 4 holders which blocks → | POWERTEL KENTUCKY LICENSES, INC. | 365C | LOUISVILLE | KY |
| 2005-06-30 | 514-512 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2005-06-30 | 514-513 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2005-06-30 | 514-515 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2005-06-30 | 514-516 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2005-06-30 | 519-305 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Stratford | — |
| 2005-06-30 | 562-912 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | LONG BEACH | CA |
| 2005-06-30 | 618-710 | 0–9 XXXall 10 · 8 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | FREEBURG | IL |
| 2005-06-30 | 618-808 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → | CHARTER IP ENABLED SERVICES, LLC | 792K | LEBANON | IL |
| 2005-06-30 | 646-429 | 0–9 XXXall 10 · 5 holders which blocks → | VERIZON NEW YORK, INC. | 9104 | NWYRCYZN01 | NY |
| 2005-06-30 | 773-603 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN10 | IL |
| 2005-06-30 | 773-656 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | CHICGOZN10 | IL |
| 2005-06-30 | 778-238 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | New Westminster | — |
| 2005-06-30 | 778-239 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Vancouver | — |
| 2005-06-30 | 909-786 | 0–9 XXXall 10 · 5 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - CA | 8826 | ONTARIO | CA |
| 2005-06-29 | 201-680 | 0–9 XXXall 10 · 4 holders which blocks → | VERIZON NEW JERSEY, INC. | 9206 | JERSEYCITY | NJ |
| 2005-06-29 | 224-603 | 0–9 XXXall 10 · 6 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | ANTIOCH | IL |
| 2005-06-29 | 318-990 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | SHREVEPORT | LA |
| 2005-06-29 | 386-674 | 0XXX1XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → | TERRA NOVA TELECOM, INC. - FL | 382G | FLORAHOME | FL |
| 2005-06-29 | 403-463 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2005-06-29 | 450-524 | not yet reported which blocks → | Bell Mobility | 6574 | St-Jean | — |
| 2005-06-29 | 514-209 | not yet reported which blocks → | Bell Mobility | 6574 | Montreal | — |
| 2005-06-29 | 705-477 | not yet reported which blocks → | Bell Mobility | 6574 | North Bay | — |
| 2005-06-29 | 705-919 | not yet reported which blocks → | Bell Mobility | 6574 | Sudbury | — |
| 2005-06-29 | 705-931 | not yet reported which blocks → | Bell Mobility | 6574 | Peterborough | — |
| 2005-06-29 | 778-835 | not yet reported which blocks → | Bell Mobility | 6574 | Vancouver | — |
| 2005-06-29 | 780-262 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Whitecourt | — |
| 2005-06-29 | 780-264 | not yet reported which blocks → | Bell Mobility | 6574 | Edmonton | — |
| 2005-06-29 | 785-441 | not yet reported which blocks → | RURAL TEL. SERVICE CO., INC. DBA NEX-TECH | 1826 | RUSSELL | KS |
| 2005-06-29 | 819-212 | not yet reported which blocks → | Bell Mobility | 6574 | Sherbrooke | — |
| 2005-06-29 | 845-806 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | MONROE | NY |
| 2005-06-29 | 905-499 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Brampton | — |
| 2005-06-29 | 905-614 | not yet reported which blocks → | Bell Canada | 8051 | Cooksville | — |
| 2005-06-29 | 905-766 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Cooksville | — |
| 2005-06-29 | 937-733 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | EATON | OH |
| 2005-06-28 | 201-546 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | HACKENSACK | NJ |
| 2005-06-28 | 410-470 | 0–9 XXXwhole prefix which blocks → | VERIZON MARYLAND, INC. | 9212 | BALTIMORE | MD |
| 2005-06-28 | 410-501 | 0–9 XXXall 10 · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | ARBUTUS | MD |
| 2005-06-28 | 613-982 | not yet reported which blocks → | Globalstar | 6996 | Smiths Falls | — |
| 2005-06-28 | 619-565 | 0–9 XXXall 10 · 5 holders which blocks → | T-MOBILE USA, INC. | 6529 | CHULAVISTA | CA |
| 2005-06-28 | 705-370 | not yet reported which blocks → | ExaTEL Inc. | 3147 | Little Current | — |
| 2005-06-28 | 705-640 | not yet reported which blocks → | ExaTEL Inc. | 3147 | Bracebridge | — |
| 2005-06-28 | 705-850 | not yet reported which blocks → | ExaTEL Inc. | 3147 | Wawa | — |
| 2005-06-28 | 705-860 | not yet reported which blocks → | ExaTEL Inc. | 3147 | Chapleau | — |
| 2005-06-27 | 210-423 | 0–9 XXXwhole prefix which blocks → | SOUTHWESTERN BELL | 9533 | SANANTONIO | TX |
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.