NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 26
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 22
ONVOY, LLC - CA 21
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
2013-02-08 276-754 0XXX1XXX4XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K CANA VA
2013-02-08 289-719 not yet reported which blocks → Comwave Networks 160G Streetsville —
2013-02-08 289-729 not yet reported which blocks → Comwave Networks 160G Malton —
2013-02-08 289-749 not yet reported which blocks → Comwave Networks 160G Castlemore —
2013-02-08 360-964 0–9 XXXall 10 · 5 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 MONTESANO WA
2013-02-08 438-374 not yet reported which blocks → Videotron Ltd. 8306 Montreal —
2013-02-08 475-243 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F ANSONIDRBY CT
2013-02-08 475-444 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F NEWTOWN CT
2013-02-08 475-999 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF CONNECTICUT, LLC - CT 539F FAIRFIELD CT
2013-02-08 480-400 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF ARIZONA, LLC - AZ 579F PHOENIX AZ
2013-02-08 502-912 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G LOUISVILLE KY
2013-02-08 575-468 0–9 XXXall 10 · 7 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NM 7464 PORTALES NM
2013-02-08 581-985 not yet reported which blocks → Videotron Ltd. 328F Quebec —
2013-02-08 618-603 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 BENTON IL
2013-02-08 702-907 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NV 075F LAS VEGAS NV
2013-02-08 727-666 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF FLORIDA, LLC - FL 902E CLEARWATER FL
2013-02-08 816-302 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 KANSASCITY MO
2013-02-08 917-933 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN07 NY
2013-02-07 205-732 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G BIRMINGHAM AL
2013-02-07 312-724 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - IL 984E CHICGOZN01 IL
2013-02-07 334-781 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G MONTGOMERY AL
2013-02-07 727-800 0–9 XXXall 10 · 5 holders which blocks → TERRA NOVA TELECOM, INC. - FL 382G STPETERSBG FL
2013-02-07 774-777 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - MA 892D FRAMINGHAM MA
2013-02-07 832-780 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 DEER PARK TX
2013-02-07 843-212 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G CHARLESTON SC
2013-02-07 864-501 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 551G GREENVILLE SC
2013-02-07 917-983 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2013-02-06 251-303 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G MOBILE AL
2013-02-06 336-530 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ELKIN NC
2013-02-06 336-576 3XXX4XXX · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K COURTNEY NC
2013-02-06 336-843 0–9 XXXall 10 · 2 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K LEXINGTON NC
2013-02-06 336-875 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K HIGH POINT NC
2013-02-06 434-288 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - VA 079F VICTORIA VA
2013-02-06 470-206 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E ROCKMART GA
2013-02-06 570-880 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F SCRANTON PA
2013-02-06 681-225 not yet reported which blocks → SHENTEL COMMUNICATIONS, LLC. - WV 489F WAR WV
2013-02-06 724-800 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - PA 002F PRINCETON PA
2013-02-06 910-832 0–9 XXXall 10 · 3 holders which blocks → NUSO, LLC 551G WILMINGTON NC
2013-02-06 919-703 0–9 XXXall 10 · 5 holders which blocks → NUSO, LLC 551G RALEIGH NC
2013-02-06 980-319 0–9 XXXall 10 · 2 holders which blocks → NUSO, LLC 551G CHARLOTTE NC
2013-02-05 204-507 not yet reported which blocks → TELUS Integrated Communications 2782 Stonewall —
2013-02-05 204-508 not yet reported which blocks → TELUS Integrated Communications 2782 Sanford —
2013-02-05 289-569 not yet reported which blocks → Comwave Networks 160G Brampton —
2013-02-05 289-869 not yet reported which blocks → Comwave Networks 160G Oshawa —
2013-02-05 321-900 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - FL 937C KISSIMMEE FL
2013-02-05 336-628 0–9 XXXall 10 · 6 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K ASHEBORO NC
2013-02-05 336-763 0–9 XXXwhole prefix which blocks → TWC IP ENABLED SERVICES, LLC 793K GREENSBORO NC
2013-02-05 438-266 not yet reported which blocks → Comwave Networks 160G Montreal —
2013-02-05 480-500 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ
2013-02-05 623-500 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - AZ 630E PHOENIX AZ

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.