NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

2 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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 — NPA 682
T-MOBILE USA, INC. 1
ONVOY, LLC - TX 1
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
— 682-557 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.