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
— 681-341 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHRLSTNZN1 WV
— 681-359 3XXX5XXX6XXX · 2 holders which blocks → ONVOY, LLC - WV 449F VALLEY ML WV
— 681-367 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → COMMIO, LLC 939H WESTON WV
— 681-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-433 0–9 XXXall 10 · 6 holders which blocks → TELNYX LLC 073H WESTON WV
— 681-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-690 0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 4 holders which blocks → NUSO, LLC 732J BRANDYWINE WV
— 681-700 not yet reported which blocks → WV
— 681-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-755 not yet reported which blocks → T-MOBILE USA, INC. 6529 ANSTED WV
— 681-811 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-911 not yet reported which blocks → MULTIPLE OCN LISTING MULT WV
— 681-950 not yet reported which blocks → WV
— 681-958 not yet reported which blocks → WV
— 681-959 not yet reported which blocks → WV
— 681-976 not yet reported which blocks → WV
— 682-211 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-214 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NRICHLDHLS TX
— 682-216 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 6506 ARLINGTON TX
— 682-222 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - TX 903C MANSFIELD TX
— 682-225 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C GLENDALE TX
— 682-231 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLC - TX 903C FORT WORTH TX
— 682-235 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C FORT WORTH TX
— 682-248 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-253 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J ATLAS TX
— 682-257 0–9 XXXall 10 · 5 holders which blocks → METROPCS, INC. 5562 NRICHLDHLS TX
— 682-263 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLC - TX 903C GLENDALE TX
— 682-267 not yet reported which blocks → ONVOY, LLC - TX 903C FORT WORTH TX
— 682-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-318 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLC - TX 903C ARLINGTON TX
— 682-334 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY, LLC - TX 903C NRICHLDHLS TX
— 682-350 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F FORT WORTH TX
— 682-365 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-429 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GLENDALE TX
— 682-432 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → ONVOY, LLC - TX 903C FORT WORTH TX
— 682-452 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EULESS TX
— 682-465 none assigned yet which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-472 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-498 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F GRANBURY TX
— 682-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 682-521 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-549 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ROANOKE TX
— 682-551 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-552 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-553 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-554 not yet reported which blocks → T-MOBILE USA, INC. 6529 ARLINGTON TX
— 682-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX

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.