NumberResearch Membership · Data 09/30/2026

Recent prefix assignments

375 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/30/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
Rogers Communications Canada Inc. (Wireless) 46
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2019-11-11 951-508 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 CORONA CA
2019-11-08 213-468 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 13 CA
2019-11-08 308-270 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEARNEY NE
2019-11-08 510-767 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 FRNK MAIN CA
2019-11-08 579-404 not yet reported which blocks → Distributel 083E St-Calixte-de-Kilkenny —
2019-11-08 579-405 not yet reported which blocks → Distributel 083E St-Damase —
2019-11-08 579-406 not yet reported which blocks → Distributel 083E St-Hippolyte —
2019-11-08 579-407 not yet reported which blocks → Distributel 083E St-Lin —
2019-11-08 579-408 not yet reported which blocks → Distributel 083E St-Pie —
2019-11-08 579-409 not yet reported which blocks → Distributel 083E Ste-Anne-des-Plaines —
2019-11-08 579-410 not yet reported which blocks → Distributel 083E Ste-Madeleine —
2019-11-08 657-409 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SILVERADO CA
2019-11-08 657-416 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2019-11-08 657-430 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SANTA ANA CA
2019-11-08 878-223 0–9 XXXall 10 · 7 holders which blocks → CSC WIRELESS, LLC 425J UNIONTOWN PA
2019-11-08 954-869 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - FL 8300 FTLAUDERDL FL
2019-11-07 236-471 not yet reported which blocks → TELUS 8086 Vancouver —
2019-11-07 404-383 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - GA 067D ATLANTA GA
2019-11-07 509-824 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - WA 006F SPOKANE WA
2019-11-07 540-573 0–9 XXXall 10 · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - VA 4644 PULASKI VA
2019-11-07 579-402 not yet reported which blocks → Distributel 083E Actonvale —
2019-11-07 579-403 not yet reported which blocks → Distributel 083E Mirabel-Aeroport —
2019-11-07 814-738 0–9 XXXall 10 · 4 holders which blocks → CSC WIRELESS, LLC 425J ERIE PA
2019-11-07 814-895 0–9 XXXall 10 · 3 holders which blocks → CSC WIRELESS, LLC 425J ALTOONA PA
2019-11-07 828-616 0–9 XXXall 10 · 5 holders which blocks → RIVERSTREET COMMUNICATIONS OF NO CAROLINA - NC 769H BOONE NC
2019-11-07 910-656 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 FAYETTEVL NC
2019-11-06 236-513 not yet reported which blocks → Videotron Ltd. 787G Vancouver —
2019-11-06 332-218 0–9 XXXwhole prefix which blocks → LEVEL 3 COMMUNICATIONS, LLC - NY 4006 NWYRCYZN01 NY
2019-11-06 509-409 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 QUINCY WA
2019-11-06 571-537 0–9 XXXwhole prefix which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2019-11-06 571-539 0–9 XXXall 10 · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HERNDON VA
2019-11-06 647-425 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2019-11-06 647-450 not yet reported which blocks → Videotron Ltd. 787G Toronto —
2019-11-06 825-395 not yet reported which blocks → TELUS 8084 Calgary —
2019-11-06 873-629 not yet reported which blocks → Cooptel 818D St-Germain-de-Grantham —
2019-11-05 225-433 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J BATONROUGE LA
2019-11-05 318-725 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J SHREVEPORT LA
2019-11-05 337-270 0–9 XXXall 10 · 2 holders which blocks → EXIANT COMMUNICATIONS LLC 114J LAFAYETTE LA
2019-11-05 431-602 not yet reported which blocks → MTS Inc. 8088 Brandon —
2019-11-05 431-603 not yet reported which blocks → MTS Inc. 8088 Dauphin —
2019-11-05 431-604 not yet reported which blocks → MTS Inc. 8088 Melita —
2019-11-05 431-605 not yet reported which blocks → MTS Inc. 8088 Morris —
2019-11-05 431-606 not yet reported which blocks → MTS Inc. 8088 Selkirk —
2019-11-05 431-607 not yet reported which blocks → MTS Inc. 8088 Steinbach —
2019-11-05 431-608 not yet reported which blocks → MTS Inc. 8088 Swan River —
2019-11-05 431-609 not yet reported which blocks → MTS Inc. 8088 Thompson —
2019-11-05 469-869 not yet reported which blocks → RIGHT CALL LLC 365J IRVING TX
2019-11-05 469-889 not yet reported which blocks → RIGHT CALL LLC 365J PLANO TX
2019-11-05 469-944 not yet reported which blocks → RIGHT CALL LLC 365J DALLAS TX
2019-11-05 469-979 not yet reported which blocks → RIGHT CALL LLC 365J ROCKWALL TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/30/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.