NumberResearchRecent prefix assignments
349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026
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 |
|---|---|---|---|---|---|---|
| 2005-05-09 | 416-619 | not yet reported which blocks → | TELUS Integrated Communications | 2782 | Toronto | — |
| 2005-05-09 | 519-997 | not yet reported which blocks → | Primus Telecommunications Canada Inc. | 201A | Windsor | — |
| 2005-05-09 | 617-955 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CAMBRIDGE | MA |
| 2005-05-09 | 704-646 | 0–9 XXXwhole prefix which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | CHARLOTTE | NC |
| 2005-05-09 | 806-559 | 0–9 XXXall 10 · 2 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LUBBOCK | TX |
| 2005-05-09 | 828-808 | not yet reported which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NC | 6324 | ARDEN | NC |
| 2005-05-09 | 832-518 | 0–9 XXXall 10 · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | HOUSTON | TX |
| 2005-05-06 | 240-750 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | GAITHERSBG | MD |
| 2005-05-06 | 403-420 | not yet reported which blocks → | Bell West Inc. | 2933 | Airdrie | — |
| 2005-05-06 | 403-469 | not yet reported which blocks → | Bell West Inc. | 2933 | High River | — |
| 2005-05-06 | 403-480 | not yet reported which blocks → | Bell West Inc. | 2933 | Strathmore | — |
| 2005-05-06 | 403-621 | not yet reported which blocks → | Bell West Inc. | 2933 | Canmore | — |
| 2005-05-06 | 403-855 | not yet reported which blocks → | Bell West Inc. | 2933 | Cochrane | — |
| 2005-05-06 | 403-939 | not yet reported which blocks → | Bell West Inc. | 2933 | Okotoks | — |
| 2005-05-06 | 613-425 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Gloucester | — |
| 2005-05-05 | 219-263 | 0–9 XXXall 10 · 5 holders which blocks → | FRONTIER NORTH, INC.. - IN | 0772 | VALPARAISO | IN |
| 2005-05-05 | 313-423 | 0–9 XXXall 10 · 6 holders which blocks → | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2005-05-05 | 403-372 | not yet reported which blocks → | TELUS | 8084 | Crowsnest Pass | — |
| 2005-05-05 | 613-370 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Embrun | — |
| 2005-05-05 | 613-421 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Ottawa-Hull | — |
| 2005-05-05 | 613-424 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Orleans | — |
| 2005-05-05 | 613-429 | not yet reported which blocks → | Rogers Communications Canada Inc. (Cable) | 743B | Navan | — |
| 2005-05-05 | 620-952 | none assigned yet which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - KS | 6532 | ULYSSES | KS |
| 2005-05-05 | 780-302 | not yet reported which blocks → | TELUS | 8084 | Falher | — |
| 2005-05-05 | 905-747 | not yet reported which blocks → | Bell Canada | 8051 | Thornhill | — |
| 2005-05-04 | 317-747 | 0–9 XXXall 10 · 7 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN | 7440 | FORTVILLE | IN |
| 2005-05-04 | 337-858 | 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | YOUNGSVL | LA |
| 2005-05-04 | 403-774 | not yet reported which blocks → | GT Group Telecom Services Corp. | 8506 | Calgary | — |
| 2005-05-04 | 443-840 | 0–9 XXXall 10 · 3 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CATONSVL | MD |
| 2005-05-04 | 443-860 | 0–9 XXXall 10 · 5 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC - DC | 4036 | CATONSVL | MD |
| 2005-05-04 | 702-635 | 0–9 XXXall 10 · 4 holders which blocks → | NEW CINGULAR WIRELESS PCS, LLC | 6010 | LAS VEGAS | NV |
| 2005-05-04 | 971-321 | 0–9 XXXwhole prefix which blocks → | QWEST CORPORATION | 9638 | PORTLAND | OR |
| 2005-05-03 | 407-722 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS NETWORKS, LLC | 899D | ORLANDO | FL |
| 2005-05-03 | 563-657 | 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → | ONVOY, LLC - IA | 221F | WALCOTT | IA |
| 2005-05-03 | 850-726 | 1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL | 6502 | SUNNYHILLS | FL |
| 2005-05-03 | 920-550 | 0–9 XXXall 10 · 7 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - WI | 5489 | SHEBOGNFLS | WI |
| 2005-05-02 | 347-750 | 0–9 XXXall 10 · 3 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NY | 7133 | NWYRCYZN06 | NY |
| 2005-05-02 | 418-716 | not yet reported which blocks → | Videotron Ltd. | 8306 | Saint-Tite | — |
| 2005-05-02 | 502-470 | 0–9 XXXwhole prefix which blocks → | LEVEL 3 TELECOM OF KENTUCKY, LLC - KY | 7260 | LOUISVILLE | KY |
| 2005-05-02 | 646-688 | 0–9 XXXall 10 · 2 holders which blocks → | MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | NWYRCYZN01 | NY |
| 2005-05-02 | 778-786 | not yet reported which blocks → | GT Group Telecom Services Corp. | 8506 | Vancouver | — |
| 2005-05-02 | 902-283 | not yet reported which blocks → | Bragg Communications Inc. | 4878 | Georgetown | — |
| 2005-05-02 | 954-302 | 0–9 XXXall 10 · 2 holders which blocks → | LEVEL 3 COMMUNICATIONS, LLC - FL | 4802 | FTLAUDERDL | FL |
| 2005-04-29 | 678-949 | 0–9 XXXall 10 · 4 holders which blocks → | ONVOY, LLC - GA | 067D | ATLANTA | GA |
| 2005-04-28 | 318-903 | 0XXX2XXX3XXX · 2 holders which blocks → | PAETEC ITEL, LLC | 829J | VIDALIA | LA |
| 2005-04-28 | 318-907 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | WINNSBORO | LA |
| 2005-04-28 | 337-701 | 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → | PAETEC ITEL, LLC | 829J | EUNICE | LA |
| 2005-04-28 | 337-702 | 1XXX2XXX3XXX · 3 holders which blocks → | PAETEC ITEL, LLC | 829J | LAKEARTHUR | LA |
| 2005-04-28 | 423-216 | 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | PAETEC ITEL, LLC | 829J | BENTON | TN |
| 2005-04-28 | 617-888 | 0–9 XXXwhole prefix which blocks → | OMNIPOINT MIAMI E LICENSE, LLC | 6889 | BOSTON | MA |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.