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
— 870-479 0XXX2XXX4XXX5XXX6XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 GRADY AR
— 870-480 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
— 870-481 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MIDWAY AR
— 870-482 2XXX4XXX5XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 CARAWAY AR
— 870-483 not yet reported which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 TRUMANN AR
— 870-485 6XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 SWIFTON AR
— 870-486 7XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 MONETTE AR
— 870-487 not yet reported which blocks → E. RITTER TEL. CO. 1722 TYRONZA AR
— 870-488 2XXX4XXX6XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 HENDERSON AR
— 870-489 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
— 870-491 1XXX3XXX4XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 TRACYFERRY AR
— 870-492 8XXX which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MALLARD PT AR
— 870-494 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 FORREST CY AR
— 870-496 3XXX5XXX · 2 holders which blocks → WINDSTREAM ARKANSAS, INC. 1691 WITTS SPG AR
— 870-499 1XXX2XXX4XXX6XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 NORFORK AR
— 870-502 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-503 none assigned yet which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 NEWPORT AR
— 870-506 1XXX which blocks → TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G BULLSHOALS AR
— 870-507 5XXX6XXX · 2 holders which blocks → CSC VOICE, LLC 612K MIDWAY AR
— 870-508 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MT HOME AR
— 870-510 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 PINE BLUFF AR
— 870-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-512 0XXX5XXX6XXX which blocks → SOUTHWESTERN BELL 9533 NEWPORT AR
— 870-515 2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F PINE BLUFF AR
— 870-519 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → T-MOBILE USA, INC. 6529 FORREST CY AR
— 870-522 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 LEONARD AR
— 870-523 not yet reported which blocks → SOUTHWESTERN BELL 9533 NEWPORT AR
— 870-524 2XXX6XXX8XXX · 3 holders which blocks → CSC VOICE, LLC 612K WALDO AR
— 870-526 not yet reported which blocks → E. RITTER TEL. CO. 1722 KEISER AR
— 870-528 2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 JESUP AR
— 870-529 2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 CARRYVILLE AR
— 870-530 4XXX5XXX7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JONESBORO AR
— 870-531 not yet reported which blocks → E. RITTER TEL. CO. 1722 GARDEN PT AR
— 870-532 0XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 BLYTHEVL AR
— 870-533 0XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 STAMPS AR
— 870-534 not yet reported which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-535 not yet reported which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-536 not yet reported which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-537 0XXX2XXX3XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 JOINER AR
— 870-538 0XXX6XXX7XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 DERMOTT AR
— 870-539 3XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1143 LEACHVILLE AR
— 870-540 5XXX which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-541 not yet reported which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-542 4XXX which blocks → WALNUT HILL TEL. CO. 1729 FOREMAN AR
— 870-543 none assigned yet which blocks → SOUTHWESTERN BELL 9533 PINE BLUFF AR
— 870-544 0XXX3XXX4XXX5XXX8XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 POLLARD AR
— 870-545 1XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 RUDD AR
— 870-546 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 NORPHLET AR
— 870-547 not yet reported which blocks → SOUTHWEST ARKANSAS TEL. COOP., INC. 1724 EMERSON AR
— 870-548 5XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 GILLETT 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.