NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
— 870-610 0XXX1XXX2XXX6XXX · 3 holders which blocks → ONVOY, LLC - AR 348F HATFIELD AR
— 870-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-612 5XXX7XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 BATESVILLE AR
— 870-613 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 BATESVILLE AR
— 870-619 2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 PINE BLUFF AR
— 870-620 2XXX3XXX · 2 holders which blocks → CSC VOICE, LLC 612K LAKEVIEW AR
— 870-622 not yet reported which blocks → SOUTHWESTERN BELL 9533 OSCEOLA AR
— 870-623 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BLYTHEVL AR
— 870-625 8XXX which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 MAMMOTHSPG AR
— 870-628 0XXX2XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 STAR CITY AR
— 870-630 8XXX which blocks → SOUTHWESTERN BELL 9533 FORREST CY AR
— 870-633 not yet reported which blocks → SOUTHWESTERN BELL 9533 FORREST CY AR
— 870-636 4XXX7XXX8XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - GA 6214 W MEMPHIS AR
— 870-638 0XXX1XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → METROPCS, INC. 5562 BRINKLEY AR
— 870-639 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - AR 5179 EL DORADO AR
— 870-640 none assigned yet which blocks → TCA COMMUNICATIONS, LLC DBA SUDDENLINK COMM - AR 048G FLIPPIN AR
— 870-642 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 DE QUEEN AR
— 870-644 2XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WATSON AR
— 870-645 not yet reported which blocks → SOUTHWEST ARKANSAS TEL. COOP., INC. 1724 TRIGG AR
— 870-647 0XXX4XXX5XXX7XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 MAYNARD AR
— 870-652 not yet reported which blocks → MOUNTAIN VIEW TELEPHONE COMPANY 1712 PLEASATGRV AR
— 870-653 not yet reported which blocks → SOUTHWEST ARKANSAS TEL. COOP., INC. 1724 FOUKE AR
— 870-655 0XXX2XXX3XXX4XXX6XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 WILSON AR
— 870-657 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 BLACKFIHLK AR
— 870-658 5XXX6XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 LUXORA AR
— 870-659 2XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 STUTTGART AR
— 870-664 2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NEWPORT AR
— 870-665 0XXX3XXX4XXX5XXX7XXX which blocks → T-MOBILE USA, INC. 6529 EL DORADO AR
— 870-668 2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 CONCORD AR
— 870-670 not yet reported which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 HORSEHBEND AR
— 870-671 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → NUSO, LLC 732J PINE BLUFF AR
— 870-672 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 STUTTGART AR
— 870-673 not yet reported which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 STUTTGART AR
— 870-674 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 STUTTGART AR
— 870-675 9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 CAMDEN AR
— 870-678 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 SPARKMAN AR
— 870-679 1XXX2XXX3XXX4XXX7XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WALNUT RDG AR
— 870-683 not yet reported which blocks → SOUTHWEST ARKANSAS TEL. COOP., INC. 1724 TRIGG AR
— 870-684 not yet reported which blocks → RICE BELT TEL. CO. 1721 WEINER AR
— 870-685 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 CHIDESTER AR
— 870-687 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BEARDEN AR
— 870-689 not yet reported which blocks → SOUTH ARKANSAS TEL. CO., INC. 1702 LOUANN AR
— 870-691 not yet reported which blocks → SOUTHWEST ARKANSAS TEL. COOP., INC. 1724 FOUKE AR
— 870-692 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PINE BLUFF AR
— 870-693 none assigned yet which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 WALDO AR
— 870-694 0XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 TAYLOR AR
— 870-695 0XXX2XXX4XXX5XXX6XXX · 5 holders which blocks → SOUTHWESTERN BELL 9533 MCNEIL AR
— 870-696 0XXX2XXX5XXX6XXX · 4 holders which blocks → SOUTHWESTERN BELL 9533 MACEDONIA AR
— 870-697 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 HICKORYRDG AR
— 870-698 8XXX which blocks → SOUTHWESTERN BELL 9533 BATESVILLE AR

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.