NumberResearchRecent prefix assignments
338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026
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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Oct 2025
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2022-06-29 | 657-605 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ORANGE | CA |
| 2022-06-29 | 661-590 | 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | WASCO | CA |
| 2022-06-29 | 669-314 | 0–9 XXXall 10 · 5 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | SUNNYVALE | CA |
| 2022-06-29 | 669-316 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAMPBELL | CA |
| 2022-06-29 | 763-353 | 0–9 XXXall 10 · 2 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MN | 5816 | TWINCITIES | MN |
| 2022-06-29 | 771-213 | 0–9 XXXall 10 · 4 holders which blocks → | METROPCS, INC. | 5562 | WSHNGTNZN1 | DC |
| 2022-06-29 | 820-208 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ATASCADERO | CA |
| 2022-06-29 | 910-732 | 1XXX which blocks → | TWC IP ENABLED SERVICES, LLC | 793K | FAIR BLUFF | NC |
| 2022-06-29 | 910-943 | 0XXX1XXX5XXX · 3 holders which blocks → | CSC VOICE, LLC | 612K | NEWTON GRV | NC |
| 2022-06-29 | 915-306 | 0–9 XXXall 10 · 4 holders which blocks → | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | CANUTILLO | TX |
| 2022-06-29 | 925-441 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | ANTIOCH | CA |
| 2022-06-29 | 949-693 | 0–9 XXXall 10 · 3 holders which blocks → | ONVOY, LLC - CA | 649C | TRABUCO | CA |
| 2022-06-29 | 949-703 | 0–9 XXXall 10 · 4 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | IRVINE | CA |
| 2022-06-29 | 949-710 | 0–9 XXXall 10 · 3 holders which blocks → | U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS | 671J | CAPITRNVLY | CA |
| 2022-06-29 | 954-936 | 0–9 XXXwhole prefix which blocks → | BELLSOUTH TELECOMM INC DBA SOUTHERN BELL TEL & TEL | 9417 | HOLLYWOOD | FL |
| 2022-06-28 | 346-562 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2022-06-28 | 346-563 | 0–9 XXXwhole prefix which blocks → | AERIAL COMMUNICATIONS, INC. | 6701 | HOUSTON | TX |
| 2022-06-28 | 709-201 | not yet reported which blocks → | Distributel | 081E | Burin | — |
| 2022-06-28 | 709-202 | not yet reported which blocks → | Distributel | 081E | Carbonear | — |
| 2022-06-28 | 709-203 | not yet reported which blocks → | Distributel | 081E | Clarenville | — |
| 2022-06-28 | 709-204 | not yet reported which blocks → | Distributel | 081E | Fermeuse | — |
| 2022-06-28 | 709-208 | not yet reported which blocks → | Distributel | 081E | Freshwater | — |
| 2022-06-28 | 709-210 | not yet reported which blocks → | Distributel | 081E | Gambo | — |
| 2022-06-28 | 709-250 | not yet reported which blocks → | Distributel | 081E | Glovertown | — |
| 2022-06-28 | 709-294 | not yet reported which blocks → | Distributel | 081E | Grand Bank | — |
| 2022-06-28 | 709-302 | not yet reported which blocks → | Distributel | 081E | Harbour Breton | — |
| 2022-06-28 | 709-305 | not yet reported which blocks → | Distributel | 081E | Harbour Main | — |
| 2022-06-28 | 709-306 | not yet reported which blocks → | Distributel | 081E | Hermitage | — |
| 2022-06-28 | 709-308 | not yet reported which blocks → | Distributel | 081E | Long Pond | — |
| 2022-06-28 | 709-313 | not yet reported which blocks → | Distributel | 081E | Marystown | — |
| 2022-06-28 | 709-316 | not yet reported which blocks → | Distributel | 081E | Port Blandford | — |
| 2022-06-28 | 709-317 | not yet reported which blocks → | Distributel | 081E | St. John's | — |
| 2022-06-28 | 709-318 | not yet reported which blocks → | Distributel | 081E | Portugal Cove | — |
| 2022-06-28 | 709-319 | not yet reported which blocks → | Distributel | 081E | St. Lawrence | — |
| 2022-06-28 | 737-326 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | AUSTIN | TX |
| 2022-06-28 | 737-328 | 0–9 XXXwhole prefix which blocks → | T-MOBILE USA, INC. | 6529 | AUSTIN | TX |
| 2022-06-28 | 830-245 | 0–9 XXXwhole prefix which blocks → | STPCS JOINT VENTURE, LLC | 4290 | DEL RIO | TX |
| 2022-06-28 | 910-699 | 0–9 XXXall 10 · 5 holders which blocks → | COMMIO, LLC | 939H | FAYETTEVL | NC |
| 2022-06-27 | 220-229 | 1XXX5XXX9XXX · 3 holders which blocks → | CSC VOICE, LLC | 612K | CHESTERHL | OH |
| 2022-06-27 | 251-396 | 0–9 XXXall 10 · 3 holders which blocks → | ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC | 6916 | MOBILE | AL |
| 2022-06-27 | 251-398 | 0–9 XXXwhole prefix which blocks → | ELISKA WIRELESS VENTURES SUBSIDIARY I, LLC | 6916 | MOBILE | AL |
| 2022-06-27 | 431-909 | not yet reported which blocks → | Westman Media Cooperative Ltd | 120F | Mafeking | — |
| 2022-06-27 | 531-285 | 0XXX1XXX2XXX · 3 holders which blocks → | GLENWOOD TELECOMMUNICATIONS, INC. - NE | 885E | SHICKLEY | NE |
| 2022-06-27 | 567-387 | 0–9 XXXall 10 · 4 holders which blocks → | PEERLESS NETWORK OF OHIO, LLC - OH | 284F | LIMA | OH |
| 2022-06-27 | 689-279 | 0–9 XXXall 10 · 3 holders which blocks → | BANDWIDTH.COM CLEC, LLC - FL | 982E | SANFORD | FL |
| 2022-06-24 | 354-399 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Hemmingford | — |
| 2022-06-24 | 354-499 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Henryville | — |
| 2022-06-24 | 354-599 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Lacolle | — |
| 2022-06-24 | 354-699 | not yet reported which blocks → | IXICA Communications Inc. | 812H | Napierville | — |
| 2022-06-24 | 354-799 | not yet reported which blocks → | IXICA Communications Inc. | 812H | St-Blaise | — |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.