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
2011-07-18 210-245 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 SANANTONIO TX
2011-07-18 224-237 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 WAUKEGAN IL
2011-07-18 267-437 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN3 PA
2011-07-18 267-721 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS ENTERPRISES, LP 6626 PHLDLPHZN2 PA
2011-07-18 347-616 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN06 NY
2011-07-18 347-939 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NWYRCYZN07 NY
2011-07-18 424-278 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 BEVERLYHLS CA
2011-07-18 434-224 2XXX4XXX · 2 holders which blocks → SHENTEL COMMUNICATIONS, LLC. - VA 4979 SANDYLEVEL VA
2011-07-18 443-560 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-07-18 443-633 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 BALTIMORE MD
2011-07-18 469-275 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 GRANDPRARI TX
2011-07-18 505-388 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ALBUQURQUE NM
2011-07-18 614-373 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2011-07-18 631-524 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BRENTWOOD NY
2011-07-18 657-217 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E FULLERTON CA
2011-07-18 720-484 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 3467 DENVER CO
2011-07-18 757-750 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 6855 NWPTNWSZN1 VA
2011-07-18 949-572 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 IRVINE CA
2011-07-18 980-262 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM NORTH CAROLINA, INC. 0476 MATTHEWS NC
2011-07-18 980-734 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM CONCORD TELEPHONE, LLC 0474 ALBEMARLE NC
2011-07-18 980-922 0XXX1XXX2XXX3XXX4XXX6XXX9XXX · 6 holders which blocks → WINDSTREAM CONCORD TELEPHONE, LLC 0474 MTPLEASANT NC
2011-07-15 248-513 0–9 XXXall 10 · 8 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2011-07-15 347-988 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN07 NY
2011-07-15 406-604 0–9 XXXall 10 · 5 holders which blocks → BLACKFOOT COMMUNICATIONS, INC. - MT 7870 GREATFALLS MT
2011-07-15 424-277 0–9 XXXall 10 · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - CA 8826 EL SEGUNDO CA
2011-07-15 469-268 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FRISCO TX
2011-07-15 480-582 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-07-15 513-391 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OH 6025 CINCINNATI OH
2011-07-15 540-759 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 ROANOKE VA
2011-07-15 570-334 2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 HUGHESVL PA
2011-07-15 570-551 0–9 XXXall 10 · 8 holders which blocks → WINDSTREAM BUFFALO VALLEY, INC. 0151 LEWISBURG PA
2011-07-15 586-359 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ROSEVILLE MI
2011-07-15 614-290 0–9 XXXwhole prefix which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2011-07-15 717-863 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM D&E, INC. 0165 EPHRATA PA
2011-07-15 724-793 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM PENNSYLVANIA, INC. 0176 KITTANNING PA
2011-07-15 857-250 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2011-07-15 951-331 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 TEMECULA CA
2011-07-14 201-250 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 HACKENSACK NJ
2011-07-14 239-227 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 NAPLES FL
2011-07-14 289-975 not yet reported which blocks → Distributel 082E Hamilton —
2011-07-14 407-250 0–9 XXXall 10 · 2 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L ORLANDO FL
2011-07-14 438-490 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2011-07-14 438-897 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 438-898 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 438-899 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 504-295 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 NEWORLEANS LA
2011-07-14 514-416 not yet reported which blocks → Distributel 083E Montreal —
2011-07-14 573-553 0XXX3XXX6XXX7XXX · 4 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MO 7218 WESTPHALIA MO
2011-07-14 581-490 not yet reported which blocks → Videotron Ltd. 328F Chicoutimi —
2011-07-14 587-400 not yet reported which blocks → Iristel Inc. 154E Edmonton —

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.