NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

355 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
8X8, INC. 38
ONVOY, LLC - CA 31
NEW CINGULAR WIRELESS PCS, LLC - IL 28
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 18
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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2010-07-07 315-514 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MASSENA NY
2010-07-07 336-695 0–9 XXXall 10 · 2 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 WINSTN SAL NC
2010-07-07 336-925 0–9 XXXall 10 · 3 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 LEXINGTON NC
2010-07-07 404-721 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2010-07-07 404-857 0–9 XXXall 10 · 3 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2010-07-07 404-901 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2010-07-07 404-956 0–9 XXXall 10 · 2 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ATLANTA GA
2010-07-07 515-802 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 DES MOINES IA
2010-07-07 518-319 0–9 XXXall 10 · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MALONE NY
2010-07-07 587-260 not yet reported which blocks → Bell West Inc. 2933 Camrose —
2010-07-07 587-261 not yet reported which blocks → Bell West Inc. 2933 Peace River —
2010-07-07 587-262 not yet reported which blocks → Bell West Inc. 2933 Vegreville —
2010-07-07 757-602 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 NWPTNWSZN1 VA
2010-07-07 778-261 not yet reported which blocks → Bell West Inc. 2933 Cranbrook —
2010-07-07 778-273 not yet reported which blocks → Bell West Inc. 2933 Dawson Creek —
2010-07-07 778-274 not yet reported which blocks → Bell West Inc. 2933 Trail —
2010-07-07 805-330 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OXNARD CA
2010-07-07 989-359 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GLADWIN MI
2010-07-06 302-616 0–9 XXXall 10 · 4 holders which blocks → MCC TELEPHONY OF THE MID-ATLANTIC, LLC - DE 826F OCEAN VIEW DE
2010-07-06 323-320 0–9 XXXall 10 · 3 holders which blocks → METROPCS NETWORKS, LLC 899D LSAN DA 02 CA
2010-07-06 478-305 0–9 XXXall 10 · 4 holders which blocks → AT&T ENTERPRISES, LLC 516C MACON GA
2010-07-06 510-509 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 FRNK MAIN CA
2010-07-06 530-720 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2010-07-06 615-600 0–9 XXXall 10 · 6 holders which blocks → AENEAS COMMUNICATIONS, LLC - TN 2891 NASHVILLE TN
2010-07-06 623-524 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2010-07-06 623-832 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2010-07-06 715-633 1XXX3XXX · 2 holders which blocks → PLTC, LLC - WI 375F GOODMAN WI
2010-07-06 772-353 0–9 XXXall 10 · 5 holders which blocks → AT&T ENTERPRISES, LLC 516C PTST LUCIE FL
2010-07-06 931-322 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 MONTEREY TN
2010-07-06 989-522 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SAGINAW MI
2010-07-02 347-373 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-07-02 347-375 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-07-02 347-376 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NWYRCYZN03 NY
2010-07-02 506-815 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B St. George —
2010-07-02 506-816 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Blacks Harbour —
2010-07-02 613-670 not yet reported which blocks → Zayo Canada Inc. 8304 Ottawa-Hull —
2010-07-02 616-422 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2010-07-02 670-785 not yet reported which blocks → PTI PACIFICA INC. 387C SAIPAN —
2010-07-02 705-963 not yet reported which blocks → TELUS Integrated Communications 2782 Sault Ste. Marie —
2010-07-02 720-455 0–9 XXXwhole prefix which blocks → QWEST CORPORATION 9636 DENVER CO
2010-07-02 775-526 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K STAGECOACH NV
2010-07-02 778-375 not yet reported which blocks → Zayo Canada Inc. 8304 Vancouver —
2010-07-02 780-273 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Wabasca —
2010-07-02 902-326 not yet reported which blocks → TELUS Mobility 8303 Montague —
2010-07-02 902-327 not yet reported which blocks → TELUS Mobility 8303 Souris —
2010-07-02 910-859 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WILMINGTON NC
2010-06-30 224-419 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2010-06-30 608-499 1XXX4XXX5XXX7XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF THE MIDWEST, LLC - WI 983F HAZELGREEN WI
2010-06-30 760-691 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISTA CA
2010-06-30 931-650 0XXX1XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TN 6673 COOKEVILLE TN

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.