NumberResearch Membership · Data 09/26/2026

Recent prefix assignments

360 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
ONVOY, LLC - CA 26
NEW CINGULAR WIRELESS PCS, LLC - IL 26
Rogers Communications Canada Inc. (Wireless) 23
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
— 870-607 none assigned yet which blocks → CSC VOICE, LLC 612K MALLARD PT AR
— 870-609 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → CSC VOICE, LLC 612K POCAHONTAS AR
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.