NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

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 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
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
2016-10-19 249-290 not yet reported which blocks → Nexicom Telecommunications Inc 995D Bobcaygeon —
2016-10-19 249-291 not yet reported which blocks → Nexicom Telecommunications Inc 995D Fenelon Falls —
2016-10-19 346-874 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 OF TELECOM OF TEXAS, LLC - TX 7074 SUGAR LAND TX
2016-10-19 346-998 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF TEXAS, LLC - TX 177F HOUSTON TX
2016-10-19 470-522 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA GA
2016-10-19 470-538 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - GA 6540 ATLANTA NE GA
2016-10-19 581-572 not yet reported which blocks → TELUS Mobility 8303 Tadoussac —
2016-10-19 623-232 0–9 XXXall 10 · 4 holders which blocks → QWEST CORPORATION 9636 PHOENIX AZ
2016-10-19 740-840 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K MURRAYCITY OH
2016-10-19 757-902 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 NWPTNWSZN2 VA
2016-10-19 782-360 not yet reported which blocks → TELUS Integrated Communications 2782 Montague —
2016-10-19 939-355 0–9 XXXall 10 · 5 holders which blocks → LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G BAYAMONNOR PR
2016-10-19 939-715 0–9 XXXall 10 · 3 holders which blocks → LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G CAGUAS PR
2016-10-18 249-203 not yet reported which blocks → Bell Canada 8051 Sudbury —
2016-10-18 249-228 not yet reported which blocks → Bell Canada 8051 Huntsville —
2016-10-18 249-317 not yet reported which blocks → Bell Canada 8051 Parry Sound —
2016-10-18 249-346 not yet reported which blocks → Bell Canada 8051 Lindsay —
2016-10-18 249-383 not yet reported which blocks → Bell Canada 8051 Sault Ste. Marie —
2016-10-18 249-746 not yet reported which blocks → Bell Canada 8051 Gore Bay —
2016-10-18 249-773 not yet reported which blocks → Bell Canada 8051 Haliburton —
2016-10-18 249-774 not yet reported which blocks → Bell Canada 8051 North Bay —
2016-10-18 249-901 not yet reported which blocks → Bell Canada 8051 Peterborough —
2016-10-18 249-938 not yet reported which blocks → Bell Canada 8051 Barrie —
2016-10-18 323-831 0–9 XXXall 10 · 6 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 05 CA
2016-10-18 386-309 0–9 XXXall 10 · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J BUNNELL FL
2016-10-18 618-714 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → FRONTIER NORTH, INC. - IL 1036 MASCOUTAH IL
2016-10-18 619-622 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 CHULAVISTA CA
2016-10-18 682-375 0–9 XXXall 10 · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ARLINGTON TX
2016-10-18 737-401 0–9 XXXwhole prefix which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7138 AUSTIN TX
2016-10-18 772-302 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 FORTPIERCE FL
2016-10-18 786-438 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E KEYS FL
2016-10-17 213-242 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LSAN DA 01 CA
2016-10-17 213-310 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LSAN DA 01 CA
2016-10-17 224-575 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 ELGIN IL
2016-10-17 224-580 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2016-10-17 240-985 0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J WILLIAMSPT MD
2016-10-17 240-996 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MD 6119 BRUNSWICK MD
2016-10-17 240-998 0–9 XXXall 10 · 6 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J HANCOCK MD
2016-10-17 312-766 0–9 XXXwhole prefix which blocks → PEERLESS NETWORK OF ILLINOIS, LLC - IL 063E CHICGOZN01 IL
2016-10-17 317-618 0–9 XXXall 10 · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 INDIANAPLS IN
2016-10-17 405-493 0–9 XXXall 10 · 7 holders which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J OKLA CITY OK
2016-10-17 425-588 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-10-17 513-964 0–9 XXXall 10 · 2 holders which blocks → PEERLESS NETWORK OF OHIO, LLC - OH 284F CINCINNATI OH
2016-10-17 516-636 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS, INC. - NY 6622 NASSAUZN09 NY
2016-10-17 539-205 2XXX which blocks → LEVEL 3 COMMUNICATIONS, LLC - OK 5257 SPAVINAW OK
2016-10-17 628-251 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNFC CNTRL CA
2016-10-17 628-256 0–9 XXXall 10 · 6 holders which blocks → SONIC TELECOM, LLC - CA 433E SNFC MT-EV CA
2016-10-17 646-813 0–9 XXXall 10 · 3 holders which blocks → PEERLESS NETWORK OF NEW YORK, LLC - NY 155E NWYRCYZN01 NY
2016-10-17 681-781 0–9 XXXall 10 · 3 holders which blocks → WIDE VOICE, LLC - WV 729H CHRLSTNZN1 WV
2016-10-17 682-718 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.