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
2022-01-10 782-541 not yet reported which blocks → Bell Mobility Aliant 329A Summerside —
2022-01-10 804-670 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 HOPEWELL VA
2022-01-10 820-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OXNARD CA
2022-01-10 828-203 0–9 XXXall 10 · 5 holders which blocks → PAETEC ITEL, LLC 829J ASHEVILLE NC
2022-01-10 831-837 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SALINAS CA
2022-01-10 840-837 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J POMONA CA
2022-01-10 878-626 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON7 PA
2022-01-10 878-723 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON3 PA
2022-01-10 878-786 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREENSBURG PA
2022-01-10 878-834 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PTTSBGZON8 PA
2022-01-10 928-546 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BULLHEADCY AZ
2022-01-10 945-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PLANO TX
2022-01-10 945-435 0–9 XXXall 10 · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ENNIS TX
2022-01-10 945-527 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MCKINNEY TX
2022-01-10 945-536 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GRANDPRARI TX
2022-01-10 945-546 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ROCKWALL TX
2022-01-10 947-243 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TROY MI
2022-01-10 949-832 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SADLBK VLY CA
2022-01-10 959-244 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - CT 639C FARMINGTON CT
2022-01-10 959-588 0XXX1XXX2XXX3XXX4XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NIANTIC CT
2022-01-10 959-625 0XXX1XXX2XXX5XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLINTON CT
2022-01-10 959-746 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J OLD SAYBRK CT
2022-01-10 959-916 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J THOMASTON CT
2022-01-10 959-933 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WINSTED CT
2022-01-10 986-218 0XXX1XXX2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - ID 6565 HORSEHBEND ID
2022-01-10 989-897 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TWILIO INTERNATIONAL, INC. 506J BAY CITY MI
2022-01-09 272-837 0XXX1XXX2XXX3XXX4XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J TROY PA
2022-01-09 582-895 0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks → TWILIO INTERNATIONAL, INC. 506J ALTOONA PA
2022-01-09 636-351 0XXX1XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J OFALLON MO
2022-01-09 808-743 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 WAILUKU HI
2022-01-08 520-633 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 TUCSON AZ
2022-01-08 608-508 0XXX1XXX2XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC WI 7216 WESTFIELD WI
2022-01-08 734-643 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WYANDOTTE MI
2022-01-08 734-683 5XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GREGORY MI
2022-01-08 734-684 0XXX2XXX3XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J IDA MI
2022-01-08 878-253 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MONESSEN PA
2022-01-08 878-433 0XXX1XXX2XXX6XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CLAIRTON PA
2022-01-07 206-746 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 BAINBDG IS WA
2022-01-07 213-649 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 LSAN DA 11 CA
2022-01-07 213-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LSAN DA 09 CA
2022-01-07 219-837 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKE STA IN
2022-01-07 224-450 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2022-01-07 225-476 0–9 XXXall 10 · 3 holders which blocks → METROPCS, INC. 5562 BATONROUGE LA
2022-01-07 253-349 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 AUBURN WA
2022-01-07 262-575 5XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BERGEN WI
2022-01-07 269-546 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWBUFFALO MI
2022-01-07 272-462 0XXX1XXX2XXX3XXX4XXX5XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WELLSBORO PA
2022-01-07 279-782 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FAIR OAKS CA
2022-01-07 321-381 0–9 XXXall 10 · 4 holders which blocks → BOOST SUBSCRIBERCO L.L.C. 490J MELBOURNE FL
2022-01-07 331-837 0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J W CHICAGO IL

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.