NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 31
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
ONVOY, LLC - NJ 15
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
2013-02-26 909-219 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 COLTON CA
2013-02-25 270-599 0–9 XXXall 10 · 4 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K BOWLNGGREN KY
2013-02-25 386-225 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 PALM COAST FL
2013-02-25 425-363 0–9 XXXall 10 · 7 holders which blocks → CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 NORTH BEND WA
2013-02-25 469-509 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 GRANDPRARI TX
2013-02-25 579-225 not yet reported which blocks → TELUS Quebec 2243 St-Hyacinthe —
2013-02-25 579-226 not yet reported which blocks → TELUS Quebec 2243 Ste-Therese —
2013-02-25 681-208 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 SUMMERSVL WV
2013-02-25 681-443 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WV 6394 FAIRMONT WV
2013-02-25 754-265 0–9 XXXall 10 · 2 holders which blocks → AT&T ENTERPRISES, LLC 516C FTLAUDERDL FL
2013-02-25 873-407 not yet reported which blocks → TELUS Quebec 2243 La Tuque —
2013-02-23 747-225 0–9 XXXall 10 · 8 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K SNFN PACM CA
2013-02-22 204-905 not yet reported which blocks → Bell Mobility 6574 Steinbach —
2013-02-22 210-763 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2013-02-22 210-803 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 SANANTONIO TX
2013-02-22 276-329 0–9 XXXall 10 · 6 holders which blocks → COMCAST IP PHONE, LLC 318J TAZEWELL VA
2013-02-22 276-437 0–9 XXXall 10 · 6 holders which blocks → MOUNTAINET TELEPHONE COMPANY - VA 3185 NORTON VA
2013-02-22 438-397 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2013-02-22 438-398 not yet reported which blocks → Videotron Ltd. 328F Montreal —
2013-02-22 480-492 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2013-02-22 480-519 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PHOENIX AZ
2013-02-22 513-760 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - OH 001F LTL MIAMI OH
2013-02-21 314-449 0–9 XXXall 10 · 4 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2013-02-21 321-337 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 KISSIMMEE FL
2013-02-21 360-558 0–9 XXXall 10 · 4 holders which blocks → ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 VANCOUVER WA
2013-02-21 407-269 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 ORLANDO FL
2013-02-21 469-345 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 FORNEY TX
2013-02-21 518-502 0–9 XXXall 10 · 8 holders which blocks → PRIMELINK, INC. - NY 0065 GLENSFALLS NY
2013-02-21 561-229 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT MIAMI E LICENSE, LLC 6889 WPALMBEACH FL
2013-02-21 681-252 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CHARLES TN WV
2013-02-21 681-378 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J HNTNGTNZN1 WV
2013-02-21 727-223 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - FL 4802 CLEARWATER FL
2013-02-21 832-652 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C HOUSTON TX
2013-02-21 917-471 0–9 XXXall 10 · 3 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN03 NY
2013-02-21 917-893 0–9 XXXall 10 · 4 holders which blocks → CSC VOICE, LLC 612K NWYRCYZN06 NY
2013-02-21 941-251 0–9 XXXall 10 · 4 holders which blocks → BHN IP ENABLED SERVICES, LLC 045L BRADENTON FL
2013-02-21 941-264 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BRADENTON FL
2013-02-21 951-349 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 PERRIS CA
2013-02-20 204-904 not yet reported which blocks → Bell Mobility 6574 Selkirk —
2013-02-20 306-307 not yet reported which blocks → TELUS Mobility 8303 Lloydminster —
2013-02-20 502-928 0–9 XXXwhole prefix which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 LOUISVILLE KY
2013-02-20 705-496 not yet reported which blocks → Bell Aliant, a division of Bell Canada 709G North Bay —
2013-02-20 808-305 0–9 XXXwhole prefix which blocks → LEVEL 3 TELECOM OF HAWAII, LP - HI 8297 HONOLULU HI
2013-02-20 819-670 not yet reported which blocks → Bell Mobility 6574 Fabre —
2013-02-20 819-750 not yet reported which blocks → Bell Mobility 6574 Latulipe —
2013-02-19 224-240 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2013-02-19 224-407 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2013-02-19 314-305 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-02-19 405-437 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OKLA CITY OK
2013-02-19 409-888 0–9 XXXall 10 · 4 holders which blocks → FOREMOST TELECOMMUNICATIONS CORPORATION - TX 319D GALVESTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.