NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
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
2011-03-28 580-964 not yet reported which blocks → CROSS-VALLIANT CELLULAR PARTNERSHIP 387E FORTTOWSON OK
2011-03-28 720-349 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - CO 7378 DENVER CO
2011-03-25 210-238 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2011-03-25 210-551 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2011-03-25 253-348 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2011-03-25 289-773 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-03-25 289-774 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-03-25 289-775 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-03-25 289-776 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Hamilton —
2011-03-25 319-499 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → T-MOBILE USA, INC. 6529 IOWA CITY IA
2011-03-25 347-909 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2011-03-25 347-915 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN06 NY
2011-03-25 469-243 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2011-03-25 469-394 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRANDPRARI TX
2011-03-25 469-534 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKINNEY TX
2011-03-25 512-230 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 AUSTIN TX
2011-03-25 512-660 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 AUSTIN TX
2011-03-25 609-500 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 MOUNTHOLLY NJ
2011-03-25 705-990 not yet reported which blocks → Iristel Inc. 154E Huntsville —
2011-03-25 708-600 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 LA GRANGE IL
2011-03-25 712-442 2XXX4XXX6XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WOODBINE IA
2011-03-25 760-790 0–9 XXXall 10 · 6 holders which blocks → AT&T - LOCAL 7421 BRAWLEY CA
2011-03-25 813-701 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 ZEPHYRHILS FL
2011-03-25 832-499 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-03-25 863-940 0–9 XXXall 10 · 5 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L LAKELAND FL
2011-03-25 917-524 0–9 XXXall 10 · 3 holders which blocks → YMAX COMMUNICATIONS CORP. - NY 282E NWYRCYZN14 NY
2011-03-25 956-340 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCALLEN TX
2011-03-25 956-616 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCALLEN TX
2011-03-24 336-448 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 WINSTN SAL NC
2011-03-24 501-400 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J LITTLEROCK AR
2011-03-24 581-223 not yet reported which blocks → Videotron Ltd. 8306 Saint-Bernard-de-Dorchester —
2011-03-24 581-227 not yet reported which blocks → Videotron Ltd. 8306 Frampton —
2011-03-24 581-229 not yet reported which blocks → Videotron Ltd. 8306 Saint-Patrice-de-Beaurivage —
2011-03-24 715-245 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 HUDSON WI
2011-03-24 816-226 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KANSASCITY MO
2011-03-24 819-235 not yet reported which blocks → Videotron Ltd. 8306 La Patrie —
2011-03-24 819-312 not yet reported which blocks → Videotron Ltd. 8306 Chartierville —
2011-03-24 819-514 not yet reported which blocks → Videotron Ltd. 8306 East Hereford —
2011-03-24 819-515 not yet reported which blocks → Videotron Ltd. 8306 St-Malo —
2011-03-24 832-627 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 HOUSTON TX
2011-03-24 901-800 0–9 XXXall 10 · 6 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MEMPHIS TN
2011-03-24 972-905 0–9 XXXall 10 · 6 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 PLANO TX
2011-03-23 289-485 not yet reported which blocks → ISP Telecom Inc. 4727 Port Perry —
2011-03-23 289-674 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Hamilton —
2011-03-23 289-755 not yet reported which blocks → Rogers Communications Canada Inc. (Cable) 743B Hamilton —
2011-03-23 347-902 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2011-03-23 347-912 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN03 NY
2011-03-23 347-913 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN05 NY
2011-03-23 515-777 0–9 XXXall 10 · 4 holders which blocks → AUREON COMMUNICATIONS, LLC 444G DES MOINES IA
2011-03-23 647-479 not yet reported which blocks → ISP Telecom Inc. 4727 Toronto —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.