NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 870-287 9XXX which blocks → WALNUT HILL TEL. CO. 1729 MINERALSPG AR
— 870-289 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 LOCKESBURG AR
— 870-291 5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MELBOURNE AR
— 870-294 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 LURTON AR
— 870-295 not yet reported which blocks → SOUTHWESTERN BELL 9533 MARIANNA AR
— 870-297 9XXX which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 CALICOROCK AR
— 870-298 0XXX1XXX3XXX4XXX5XXX6XXX8XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 MARIANNA AR
— 870-304 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
— 870-305 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
— 870-307 none assigned yet which blocks → SOUTHWESTERN BELL 9533 BATESVILLE AR
— 870-308 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MONTICELLO AR
— 870-309 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL DORADO AR
— 870-310 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 EL DORADO AR
— 870-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-312 5XXX7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 EL DORADO AR
— 870-313 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
— 870-314 5XXX6XXX7XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 EL DORADO AR
— 870-315 7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 EL DORADO AR
— 870-321 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MT HOME AR
— 870-322 4XXX6XXX8XXX9XXX · 4 holders which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 FRANKLIN AR
— 870-325 not yet reported which blocks → CLEVELAND COUNTY TEL. CO., INC. 1698 RISON AR
— 870-326 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 ODEN AR
— 870-328 8XXX9XXX which blocks → RICE BELT TEL. CO. 1721 FISHER AR
— 870-329 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
— 870-331 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 HOPE AR
— 870-332 not yet reported which blocks → AMERICAN MESSAGING SERVICES, LLC 9748 PINE BLUFF AR
— 870-334 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 NORMAN AR
— 870-335 0XXX1XXX2XXX3XXX4XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 PARAGOULD AR
— 870-338 6XXX which blocks → SOUTHWESTERN BELL 9533 HELENA AR
— 870-339 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 HUGHES AR
— 870-341 4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → ONVOY SPECTRUM, LLC 624H PINE BLUFF AR
— 870-342 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 AMITY AR
— 870-343 0XXX3XXX4XXX5XXX6XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 TURRELL AR
— 870-345 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - AR 196F ARKADLPHIA AR
— 870-346 6XXX which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 MTPLEASANT AR
— 870-347 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 AUGUSTA AR
— 870-348 not yet reported which blocks → CLEVELAND COUNTY TEL. CO., INC. 1698 KINGSLAND AR
— 870-349 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 TUCKERMAN AR
— 870-351 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 JONESBORO AR
— 870-352 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
— 870-353 0XXX3XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 GURDON AR
— 870-354 0XXX2XXX3XXX5XXX9XXX · 3 holders which blocks → ONVOY SPECTRUM, LLC 624H UMPIRE AR
— 870-355 0XXX5XXX6XXX7XXX9XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 EUDORA AR
— 870-356 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GLENWOOD AR
— 870-357 not yet reported which blocks → CLEVELAND COUNTY TEL. CO., INC. 1698 ROWELL AR
— 870-358 not yet reported which blocks → E. RITTER TEL. CO. 1722 MARKEDTREE AR
— 870-362 1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WYNNE AR
— 870-363 not yet reported which blocks → MOUNTAIN VIEW TELEPHONE COMPANY 1712 FOX AR
— 870-364 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
— 870-365 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.