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
2022-03-02 657-592 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANAHEIM CA
2022-03-02 659-282 0XXX1XXX2XXX3XXX4XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LIVINGSTON AL
2022-03-02 682-379 0XXX6XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F SPRINGTOWN TX
2022-03-02 806-560 0–9 XXXall 10 · 4 holders which blocks → CALLWORKS CORPORATION 475J AMARILLO TX
2022-03-02 839-217 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 NEWBERRY SC
2022-03-02 938-322 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DECATUR AL
2022-03-02 940-335 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → CALLWORKS CORPORATION 475J WICHITAFLS TX
2022-03-02 954-836 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - FL 937C FTLAUDERDL FL
2022-03-02 956-676 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → CALLWORKS CORPORATION 475J BROWNSVL TX
2022-03-02 970-998 0XXX2XXX5XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MCCOY CO
2022-03-02 971-466 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SILVERTON OR
2022-03-02 971-668 1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RAINIER OR
2022-03-02 980-727 0XXX1XXX2XXX3XXX7XXX8XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORVEN NC
2022-03-01 201-619 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H JERSEYCITY NJ
2022-03-01 201-922 0–9 XXXwhole prefix which blocks → ONVOY SPECTRUM, LLC 624H CRAGMERE NJ
2022-03-01 201-971 0–9 XXXwhole prefix which blocks → ONVOY, LLC - NJ 637C HACKENSACK NJ
2022-03-01 219-373 0XXX1XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CROWNPOINT IN
2022-03-01 219-546 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GARY IN
2022-03-01 229-966 0XXX1XXX3XXX6XXX7XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HAHIRA GA
2022-03-01 302-726 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ANGOLA DE
2022-03-01 302-742 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DELAWARECY DE
2022-03-01 423-927 0XXX1XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MORRISTOWN TN
2022-03-01 425-543 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 BELLEVUE WA
2022-03-01 442-389 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E BLYTHE CA
2022-03-01 470-952 0–9 XXXwhole prefix which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 ATLANTA GA
2022-03-01 505-562 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J DIXON NM
2022-03-01 515-896 0XXX3XXX8XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIPPEY IA
2022-03-01 520-652 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → QWEST CORPORATION 9636 WHITLOW AZ
2022-03-01 530-928 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GERBER CA
2022-03-01 539-967 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BROKENARRW OK
2022-03-01 551-733 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RIDGEWOOD NJ
2022-03-01 551-766 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RUTHERFORD NJ
2022-03-01 575-599 0XXX1XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RED RIVER NM
2022-03-01 575-916 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J GALLINA NM
2022-03-01 608-978 8XXX which blocks → TON80 COMMUNICATIONS, LLC 516J MARSHALL WI
2022-03-01 618-404 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 HIGHLAND IL
2022-03-01 618-828 0XXX1XXX2XXX8XXX9XXX · 5 holders which blocks → METROPCS, INC. 5562 WESTVIEW IL
2022-03-01 618-832 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JERSEYVL IL
2022-03-01 618-872 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GLENCARBON IL
2022-03-01 620-686 0XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LARNED KS
2022-03-01 620-847 7XXX which blocks → TON80 COMMUNICATIONS, LLC 516J MULLINVL KS
2022-03-01 620-969 0XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MAPLETON KS
2022-03-01 629-526 0XXX1XXX3XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOFREDONIA TN
2022-03-01 640-466 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ATLNTIC CY NJ
2022-03-01 662-880 0–9 XXXall 10 · 5 holders which blocks → POWERTEL MEMPHIS LICENSES, INC. 7474 OLIVE BRCH MS
2022-03-01 667-446 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J ELKRIDGE MD
2022-03-01 667-468 6XXX which blocks → TON80 COMMUNICATIONS, LLC 516J NANTICOKE MD
2022-03-01 667-626 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CATONSVL MD
2022-03-01 667-737 0XXX1XXX2XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PERRYVILLE MD
2022-03-01 667-856 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J DUNDALK MD

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.