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
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
2003-02-04 870-441 none assigned yet which blocks → T-MOBILE USA, INC. 6529 PINE BLUFF AR
2003-01-29 870-336 not yet reported which blocks → E. RITTER COMMS DBA RITTER COMMUNICATIONS, INC. AR 095A JONESBORO AR
2002-12-23 870-390 0XXX1XXX3XXX4XXX5XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 CAMDEN AR
2002-12-04 870-201 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 NEWPORT AR
2002-12-04 870-202 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 POCAHONTAS AR
2002-11-12 870-868 9XXX which blocks → T-MOBILE USA, INC. 6529 ARKADLPHIA AR
2002-11-07 870-292 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks → T-MOBILE USA, INC. 6529 HOPE AR
2002-11-07 870-293 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → METROPCS, INC. 5562 ARKADLPHIA AR
2002-10-17 870-330 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 TEXARKANA AR
2002-10-17 870-842 3XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLLYGROVE AR
2002-10-17 870-843 6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JUNCTIONCY AR
2002-10-17 870-844 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IMBODEN AR
2002-10-17 870-847 9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CHEROKEVLG AR
2002-10-16 870-370 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STAR CITY AR
2002-10-16 870-371 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SALEM AR
2002-10-16 870-372 5XXX6XXX7XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CLARENDON AR
2002-10-16 870-373 5XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MELBOURNE AR
2002-10-16 870-374 6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOULD AR
2002-10-14 870-323 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CORNING AR
2002-10-14 870-324 3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PIGGOTT AR
2002-10-03 870-405 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT HOME AR
2002-09-24 870-200 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NASHVILLE AR
2002-09-11 870-221 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 MARSHALL AR
2002-08-27 870-277 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2002-08-27 870-377 8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 DUMAS AR
2002-08-27 870-378 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POCAHONTAS AR
2002-07-31 870-299 4XXX5XXX6XXX7XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MAGNOLIA AR
2002-07-30 870-333 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → AT&T - LOCAL 7421 JONESBORO AR
2002-06-11 870-317 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 FORREST CY AR
2002-06-11 870-318 2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CHERRY VLY AR
2002-06-11 870-319 1XXX2XXX3XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BRINKLEY AR
2002-05-16 870-260 1XXX3XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 ARKADLPHIA AR
2002-05-13 870-275 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 JONESBORO AR
2002-05-13 870-455 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 NASHVILLE AR
2002-05-13 870-663 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PINE BLUFF AR
2002-05-13 870-667 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 ASHDOWN AR
2002-04-15 870-788 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PINE BLUFF AR
2002-04-08 870-278 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BLYTHEVL AR
2002-03-13 870-627 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 JONESBORO AR
2002-03-07 870-273 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
2002-02-26 870-820 7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARREN AR
2002-02-26 870-821 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARIANNA AR
2002-02-26 870-822 2XXX3XXX4XXX8XXX9XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 OSCEOLA AR
2002-01-16 870-688 6XXX7XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HARRISON AR
2002-01-16 870-833 6XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAMDEN AR
2002-01-14 870-723 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONTICELLO AR
2001-12-14 870-592 5XXX6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
2001-12-05 870-220 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 FORDYCE AR
2001-11-12 870-654 1XXX8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BERRYVILLE AR
2001-09-18 870-233 9XXX which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 DE WITT 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.