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
— 870-311 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
— 870-366 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 DALARK AR
— 870-367 not yet reported which blocks → SOUTHWESTERN BELL 9533 MONTICELLO AR
— 870-368 not yet reported which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 MELBOURNE AR
— 870-375 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARKEDTREE AR
— 870-379 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DELIGHT AR
— 870-381 not yet reported which blocks → WALNUT HILL TEL. CO. 1729 WINTHROP AR
— 870-382 3XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 DUMAS AR
— 870-385 5XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 WICKES AR
— 870-386 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GILLHAM AR
— 870-387 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 COVE AR
— 870-388 8XXX which blocks → WALNUT HILL TEL. CO. 1729 SARATOGA AR
— 870-389 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 HATFIELD AR
— 870-391 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON 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.