NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 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 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
— 682-556 3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-557 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-558 2XXX3XXX4XXX5XXX7XXX8XXX · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-559 2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-560 2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-561 1XXX2XXX3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-564 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
— 682-597 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-628 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ALVARADO TX
— 682-636 3XXX6XXX · 2 holders which blocks → TON80 COMMUNICATIONS, LLC 516J RHOME TX
— 682-651 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRAPEVINE TX
— 682-683 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
— 682-700 not yet reported which blocks → TX
— 682-707 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 FORT WORTH TX
— 682-708 0–9 XXXall 10 · 4 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FORT WORTH TX
— 682-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-719 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC - TX 903C GRANBURY TX
— 682-727 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ROANOKE TX
— 682-730 0XXX1XXX2XXX3XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 FORT WORTH TX
— 682-738 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EULESS TX
— 682-757 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 ATLAS TX
— 682-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-831 not yet reported which blocks → SOUTHWESTERN BELL 9533 ROANOKE TX
— 682-862 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ARLINGTON TX
— 682-868 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - TX 7148 MANSFIELD TX
— 682-895 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
— 682-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-936 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C GRANBURY TX
— 682-950 not yet reported which blocks → TX
— 682-958 not yet reported which blocks → TX
— 682-959 not yet reported which blocks → TX
— 682-970 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 CLEBURNE TX
— 682-976 not yet reported which blocks → TX
— 682-990 0–9 XXXall 10 · 2 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FORT WORTH TX
— 684-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-252 not yet reported which blocks → AST TELECOM, LLC 1460 AM SAMOA AS
— 684-258 not yet reported which blocks → AST TELECOM, LLC 1460 AM SAMOA AS
— 684-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST AS
— 684-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-622 not yet reported which blocks → AMERICAN SAMOA TELECOMMUNICATIONS AUTHORITY 3900 AM SAMOA AS
— 684-630 not yet reported which blocks → AMERICAN SAMOA TELECOMMUNICATIONS AUTHORITY 3900 XXXXXXXXXX AS
— 684-631 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-633 not yet reported which blocks → AMERICAN SAMOA TELECOMMUNICATIONS AUTHORITY 3900 AM SAMOA AS
— 684-639 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AS
— 684-644 not yet reported which blocks → AMERICAN SAMOA TELECOMMUNICATIONS AUTHORITY 3900 AM SAMOA AS
— 684-655 not yet reported which blocks → AMERICAN SAMOA TELECOMMUNICATIONS AUTHORITY 3900 AM SAMOA AS

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.