NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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, all time — NPA 870
SOUTHWESTERN BELL 154
NEW CINGULAR WIRELESS PCS, LLC - IL 105
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 85
WINDSTREAM ARKANSAS, INC. 72
LEVEL 3 COMMUNICATIONS, LLC - AR 47
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
— 870-392 0XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 TILLAR AR
— 870-398 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DAISY AR
— 870-400 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 W MEMPHIS AR
— 870-403 4XXX5XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ARKADLPHIA AR
— 870-404 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT HOME AR
— 870-409 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H BLYTHEVL AR
— 870-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-413 3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 PINE BLUFF AR
— 870-420 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 COMPTON AR
— 870-421 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MT HOME AR
— 870-422 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 DIAMOND CY AR
— 870-423 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
— 870-424 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MT HOME AR
— 870-425 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MT HOME AR
— 870-426 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 OMAHA AR
— 870-427 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 PYATT AR
— 870-428 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 DEER AR
— 870-429 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 WESTERNGRV AR
— 870-430 4XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 WHITEVILLE AR
— 870-431 none assigned yet which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 LAKEVIEW AR
— 870-432 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F PRESCOTT AR
— 870-434 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 MOUNTJUDEA AR
— 870-435 not yet reported which blocks → YELCOT TEL. CO. 1733 GASSVILLE AR
— 870-436 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 LEAD HILL AR
— 870-437 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 ALPENA AR
— 870-438 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREEN FOR AR
— 870-439 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 ST JOE AR
— 870-442 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 CHERRY VLY AR
— 870-443 0XXX2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MONTICELLO AR
— 870-445 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 BULLSHOALS AR
— 870-446 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 JASPER AR
— 870-447 5XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 LESLIE AR
— 870-448 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 MARSHALL AR
— 870-449 not yet reported which blocks → YELCOT TEL. CO. 1733 YELLVILLE AR
— 870-451 0XXX5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 NASHVILLE AR
— 870-453 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 FLIPPIN AR
— 870-457 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 WHEATLEY AR
— 870-458 8XXX which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 VIOLA AR
— 870-459 0XXX4XXX6XXX7XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 COTTONPLNT AR
— 870-460 5XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 MONTICELLO AR
— 870-462 6XXX7XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 HOLLYGROVE AR
— 870-463 not yet reported which blocks → SOUTH ARKANSAS TEL. CO., INC. 1702 HERMITAGE AR
— 870-464 0XXX1XXX2XXX3XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ARKADLPHIA AR
— 870-465 not yet reported which blocks → SOUTH ARKANSAS TEL. CO., INC. 1702 BANKS AR
— 870-467 2XXX4XXX7XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 GAMALIEL AR
— 870-469 0XXX2XXX3XXX4XXX6XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WILMAR AR
— 870-473 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 WILMOT AR
— 870-475 not yet reported which blocks → E. RITTER TEL. CO. 1722 LEPANTO AR
— 870-476 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PARAGOULD AR
— 870-477 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 CASH AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.