NumberResearch Membership · Data 09/24/2026

Recent prefix assignments

358 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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
2022-02-23 539-281 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 BROKENARRW OK
2022-02-23 548-981 not yet reported which blocks → Fibernetics Corporation 464D Burford —
2022-02-23 548-982 not yet reported which blocks → Fibernetics Corporation 464D Lynden —
2022-02-23 572-220 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 STILLWATER OK
2022-02-23 574-768 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELKHART IN
2022-02-23 575-294 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NM 6573 LAS CRUCES NM
2022-02-23 620-589 0XXX1XXX9XXX · 3 holders which blocks → SOUTH CENTRAL WIRELESS DBA SC TELCOM - KS 4548 CUNNINGHAM KS
2022-02-23 620-774 0XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HARTFORD KS
2022-02-23 629-283 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WHITEHOUSE TN
2022-02-23 629-426 0XXX1XXX2XXX4XXX5XXX6XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GREENBRIER TN
2022-02-23 629-746 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SCUNNINGHA TN
2022-02-23 629-966 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ASHLAND CY TN
2022-02-23 639-561 not yet reported which blocks → Fibernetics Corporation 464D Regina —
2022-02-23 639-562 not yet reported which blocks → Fibernetics Corporation 464D Saskatoon —
2022-02-23 765-757 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ANDERSON IN
2022-02-23 779-625 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WOODSTOCK IL
2022-02-23 782-370 not yet reported which blocks → Bell Mobility Aliant 329A Truro —
2022-02-23 820-799 0–9 XXXall 10 · 2 holders which blocks → FRACTEL, LLC 965H CAMARILLO CA
2022-02-23 831-366 0XXX3XXX6XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BOULDERCRK CA
2022-02-23 840-587 0–9 XXXall 10 · 3 holders which blocks → FRACTEL, LLC 965H S BERNDINO CA
2022-02-23 864-665 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - SC 8534 SIMPSONVL SC
2022-02-23 873-967 not yet reported which blocks → SSi Micro Ltd. 940G Kuujjuaraapik —
2022-02-23 901-883 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MEMPHIS TN
2022-02-23 938-258 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GUNTERSVL AL
2022-02-23 938-433 0XXX1XXX2XXX3XXX4XXX5XXX6XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FRUITHURST AL
2022-02-23 938-446 2XXX5XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LEXINGTON AL
2022-02-23 938-526 0XXX2XXX3XXX7XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RANBURNE AL
2022-02-23 938-724 0XXX2XXX5XXX6XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RINEHART AL
2022-02-23 938-787 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J VETO AL
2022-02-23 939-341 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 DORADO PR
2022-02-23 980-733 0XXX1XXX2XXX3XXX4XXX7XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MARSHVILLE NC
2022-02-23 984-942 0XXX1XXX5XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BROADWAY NC
2022-02-22 213-650 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E LSAN DA 09 CA
2022-02-22 218-873 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J BIWABIK MN
2022-02-22 218-973 0XXX1XXX3XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BEAR RIVER MN
2022-02-22 219-298 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 E CHICAGO IN
2022-02-22 224-454 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ELGIN IL
2022-02-22 231-566 0XXX1XXX5XXX6XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HARRIETTA MI
2022-02-22 231-699 0XXX1XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FOUNTAIN MI
2022-02-22 231-966 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J FREESOIL MI
2022-02-22 256-968 0XXX8XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LINEVILLE AL
2022-02-22 307-403 0XXX7XXX · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - WY 081F MORAN WY
2022-02-22 313-661 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN3 MI
2022-02-22 318-943 0XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SIMMESPORT LA
2022-02-22 318-968 0XXX1XXX6XXX7XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RODESSA LA
2022-02-22 319-374 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ORAN IA
2022-02-22 320-546 0XXX4XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ATWATER MN
2022-02-22 320-737 0XXX1XXX7XXX8XXX9XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WILLMAR MN
2022-02-22 320-782 0XXX2XXX6XXX7XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HECTOR MN
2022-02-22 321-390 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - FL 6502 COCOA FL

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.