NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 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, all time — NPA 870
WINDSTREAM ARKANSAS, INC. 72
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
2018-02-28 870-383 0XXX1XXX2XXX3XXX8XXX9XXX · 5 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 ELAINE AR
2018-02-01 870-369 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 WILMOT AR
2016-12-22 870-999 0XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 CROSSETT AR
2016-07-13 870-804 8XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 TUCKERMAN AR
2015-07-13 870-320 0XXX1XXX2XXX3XXX6XXX9XXX · 6 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 SHERIDAN AR
2015-07-13 870-669 0–9 XXXall 10 · 5 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 GLENWOOD AR
2015-07-13 870-893 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
2015-07-13 870-982 3XXX4XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 DE QUEEN AR
2015-07-13 870-985 6XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 MOUNT IDA AR
2015-06-11 870-801 1XXX6XXX9XXX · 3 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 MARSHALL AR
2015-04-20 870-712 2XXX3XXX4XXX9XXX · 3 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREEN FOR AR
2015-04-20 870-909 6XXX9XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
2011-06-02 870-280 0–9 XXXall 10 · 7 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON AR
2003-05-06 870-414 2XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON AR
2002-09-11 870-221 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 MARSHALL AR
2001-12-05 870-220 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
2001-06-20 870-726 4XXX6XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREEN FOR AR
2001-06-20 870-825 1XXX2XXX5XXX · 3 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 DIERKS AR
— 870-223 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GLENWOOD AR
— 870-254 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 CARTHAGE AR
— 870-274 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 OKOLONA AR
— 870-285 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 MURFREESBO AR
— 870-286 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 DIERKS AR
— 870-289 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 LOCKESBURG 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
— 870-313 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
— 870-326 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 ODEN AR
— 870-334 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 NORMAN AR
— 870-342 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 AMITY AR
— 870-349 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 TUCKERMAN AR
— 870-352 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
— 870-356 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GLENWOOD 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
— 870-379 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DELIGHT 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
— 870-389 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 HATFIELD AR
— 870-391 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 HARRISON AR
— 870-398 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DAISY AR
— 870-423 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
— 870-438 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREEN FOR 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
— 870-473 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 WILMOT AR
— 870-480 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
— 870-485 6XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 SWIFTON AR

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.