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
2022-01-11 575-293 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PENASCO NM
2022-01-11 575-426 0XXX1XXX3XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SPRINGER NM
2022-01-11 575-466 3XXX6XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JEMEZ SPG NM
2022-01-11 575-663 0XXX1XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SAN YSIDRO NM
2022-01-11 582-837 0XXX1XXX4XXX · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J KERSEY PA
2022-01-11 636-213 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 WARRENTON MO
2022-01-11 636-214 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CHESTERFLD MO
2022-01-11 636-867 5XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J JONESBURG MO
2022-01-11 657-547 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HUNTITNBCH CA
2022-01-11 657-693 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SANTA ANA CA
2022-01-11 657-746 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J WESTMINSTR CA
2022-01-11 657-767 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J FULLERTON CA
2022-01-11 669-639 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LOS GATOS CA
2022-01-11 669-746 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GILROY CA
2022-01-11 669-832 0–9 XXXall 10 · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNJS WEST CA
2022-01-11 669-837 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNJS SOUTH CA
2022-01-11 672-371 not yet reported which blocks → Bell Mobility 6574 Abbotsford —
2022-01-11 682-446 0–9 XXXall 10 · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J GLENDALE TX
2022-01-11 719-410 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - CO 078F WALSENBURG CO
2022-01-11 719-832 6XXX7XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J AGATE CO
2022-01-11 725-271 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 MESQUITE NV
2022-01-11 743-243 1XXX4XXX6XXX · 3 holders which blocks → TWC IP ENABLED SERVICES, LLC 793K GATEWOOD NC
2022-01-11 747-426 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SNFN PACM CA
2022-01-11 757-834 0–9 XXXwhole prefix which blocks → ONVOY, LLC - VA 138E NRFOLKZON1 VA
2022-01-11 757-840 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 NRFOLKZON3 VA
2022-01-11 757-936 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WILLIAMSBG VA
2022-01-11 762-307 0–9 XXXall 10 · 4 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 ROME GA
2022-01-11 765-710 0XXX1XXX2XXX · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F EATON IN
2022-01-11 765-846 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J PERU IN
2022-01-11 779-349 3XXX4XXX7XXX8XXX9XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 SPRING VLY IL
2022-01-11 782-495 not yet reported which blocks → Bell Mobility Aliant 329A Sydney —
2022-01-11 786-840 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C MIAMI FL
2022-01-11 786-841 0–9 XXXwhole prefix which blocks → ONVOY, LLC - FL 937C KEYS FL
2022-01-11 786-926 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J HOMESTEAD FL
2022-01-11 858-462 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NATIONALCY CA
2022-01-11 858-463 0–9 XXXall 10 · 3 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CHULAVISTA CA
2022-01-11 915-293 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C CLINT TX
2022-01-11 947-263 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J LAKE ORION MI
2022-01-11 947-362 0–9 XXXall 10 · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SOUTH LYON MI
2022-01-11 947-466 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J MILFDWH LK MI
2022-01-11 949-685 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 SADLBK VLY CA
2022-01-11 949-826 0–9 XXXall 10 · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NEWPORTBCH CA
2022-01-11 956-895 8XXX which blocks → TWILIO INTERNATIONAL, INC. 506J HARLINGEN TX
2022-01-11 970-727 0XXX2XXX5XXX8XXX · 4 holders which blocks → TON80 COMMUNICATIONS, LLC 516J CRESTEDBTE CO
2022-01-11 970-935 0XXX1XXX2XXX3XXX6XXX8XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J BRECKENRDG CO
2022-01-11 979-746 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SEALY TX
2022-01-10 206-837 0–9 XXXall 10 · 8 holders which blocks → TON80 COMMUNICATIONS, LLC 516J SEATTLE WA
2022-01-10 231-380 0XXX1XXX3XXX7XXX8XXX9XXX · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEWAYGO MI
2022-01-10 240-905 0XXX1XXX4XXX5XXX8XXX9XXX · 4 holders which blocks → METROPCS, INC. 5562 BRANDYWINE MD
2022-01-10 269-846 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → TON80 COMMUNICATIONS, LLC 516J NILES MI

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.