NumberResearchRecent prefix assignments
338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
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 |
|---|---|---|---|---|---|---|
| 2011-02-02 | 204-805 | not yet reported which blocks → | MTS Inc. | 991B | Winnipeg | — |
| 2011-02-02 | 204-894 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Winnipeg | — |
| 2011-02-02 | 226-787 | not yet reported which blocks → | Bell Mobility | 6574 | Windsor | — |
| 2011-02-02 | 226-821 | not yet reported which blocks → | Bell Mobility | 6574 | Guelph | — |
| 2011-02-02 | 425-623 | 0–9 XXXall 10 · 4 holders which blocks → | T-MOBILE USA, INC. | 6529 | BELLEVUE | WA |
| 2011-02-02 | 520-724 | 0–9 XXXall 10 · 2 holders which blocks → | QWEST CORPORATION | 9636 | TUCSON | AZ |
| 2011-02-02 | 581-308 | not yet reported which blocks → | Bell Mobility | 6574 | Quebec | — |
| 2011-02-02 | 587-335 | not yet reported which blocks → | Bell Mobility | 6574 | Edmonton | — |
| 2011-02-02 | 587-436 | not yet reported which blocks → | Bell Mobility | 6574 | Calgary | — |
| 2011-02-02 | 587-926 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Edmonton | — |
| 2011-02-02 | 587-927 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Edmonton | — |
| 2011-02-02 | 587-929 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Edmonton | — |
| 2011-02-02 | 778-350 | not yet reported which blocks → | Bell Mobility | 6574 | Victoria | — |
| 2011-02-02 | 858-255 | 0–9 XXXall 10 · 6 holders which blocks → | TELEPORT COMMUNICATIONS AMERICA, LLC - CA | 7147 | LA JOLLA | CA |
| 2011-02-02 | 938-223 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | RED BAY | AL |
| 2011-02-02 | 938-238 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | GOODWATER | AL |
| 2011-02-02 | 979-276 | 0–9 XXXall 10 · 5 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | GARWOOD | TX |
| 2011-02-01 | 202-800 | 0–9 XXXall 10 · 2 holders which blocks → | PEERLESS NETWORK OF THE DISTRICT OF COLUMBIA, DC | 275F | WSHNGTNZN1 | DC |
| 2011-02-01 | 305-900 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | KEYS | FL |
| 2011-02-01 | 318-568 | 0–9 XXXall 10 · 4 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | DRY PRONG | LA |
| 2011-02-01 | 438-402 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 438-995 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 438-996 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 438-997 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 438-998 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 443-208 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2011-02-01 | 443-314 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2011-02-01 | 443-435 | 0–9 XXXall 10 · 2 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2011-02-01 | 443-882 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2011-02-01 | 514-417 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 514-546 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Montreal | — |
| 2011-02-01 | 587-726 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Grande Prairie | — |
| 2011-02-01 | 702-359 | 0–9 XXXall 10 · 2 holders which blocks → | PEERLESS NETWORK OF NEVADA, LLC - NV | 408F | LAS VEGAS | NV |
| 2011-02-01 | 740-800 | 2XXX7XXX8XXX · 3 holders which blocks → | AT&T ENTERPRISES, LLC | 516C | CARROLL | OH |
| 2011-02-01 | 819-744 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Ottawa-Hull | — |
| 2011-02-01 | 914-254 | 0–9 XXXwhole prefix which blocks → | VERIZON NEW YORK, INC. | 9104 | WSCHSTZN07 | NY |
| 2011-02-01 | 917-737 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - NY | 997E | NWYRCYZN03 | NY |
| 2011-02-01 | 939-292 | 0–9 XXXwhole prefix which blocks → | LIBERTY MOBILE PUERTO RICO INC. | 639J | LEVITTOWN | PR |
| 2011-02-01 | 940-600 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DENTON | TX |
| 2011-01-31 | 225-600 | 6XXX9XXX · 2 holders which blocks → | ADVANCED TEL., INC. - LA | 8839 | MAUREPAS | LA |
| 2011-01-31 | 414-233 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| 2011-01-31 | 414-484 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| 2011-01-31 | 414-499 | 0–9 XXXall 10 · 2 holders which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| 2011-01-31 | 414-739 | 0–9 XXXall 10 · 3 holders which blocks → | T-MOBILE USA, INC. | 6529 | MILWAUKZN1 | WI |
| 2011-01-31 | 443-800 | 0–9 XXXall 10 · 3 holders which blocks → | OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC | 6855 | BALTIMORE | MD |
| 2011-01-31 | 567-538 | not yet reported which blocks → | GLANDORF TELEPHONE COMPANY, INC. - OH | 359G | OTTAWA | OH |
| 2011-01-31 | 587-938 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Edmonton | — |
| 2011-01-31 | 587-968 | not yet reported which blocks → | Fido Solutions Inc. | 5643 | Calgary | — |
| 2011-01-31 | 778-933 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Chilliwack | — |
| 2011-01-31 | 778-936 | not yet reported which blocks → | Rogers Communications Canada Inc. (Wireless) | 8821 | Duncan | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.