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
— 870-366 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 DALARK AR
— 870-367 not yet reported which blocks → SOUTHWESTERN BELL 9533 MONTICELLO AR
— 870-368 not yet reported which blocks → BRIGHTSPEED OF ARKANSAS, LLC 1706 MELBOURNE AR
— 870-375 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARKEDTREE AR
— 870-379 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DELIGHT AR
— 870-381 not yet reported which blocks → WALNUT HILL TEL. CO. 1729 WINTHROP AR
— 870-382 3XXX9XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 DUMAS 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
— 870-388 8XXX which blocks → WALNUT HILL TEL. CO. 1729 SARATOGA 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
— 870-392 0XXX3XXX4XXX5XXX6XXX · 3 holders which blocks → BRIGHTSPEED OF NORTHWEST ARKANSAS, LLC 1142 TILLAR AR
— 870-398 9XXX which blocks → WINDSTREAM ARKANSAS, INC. 1691 DAISY AR
— 870-400 1XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 W MEMPHIS AR
— 870-403 4XXX5XXX8XXX9XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 ARKADLPHIA AR
— 870-404 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MT HOME AR
— 870-409 0–9 XXXall 10 · 7 holders which blocks → TELNYX LLC 073H BLYTHEVL AR
— 870-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX AR
— 870-413 3XXX4XXX5XXX7XXX8XXX which blocks → T-MOBILE USA, INC. 6529 PINE BLUFF AR
— 870-420 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 COMPTON AR
— 870-421 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MT HOME AR
— 870-422 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 DIAMOND CY AR
— 870-423 none assigned yet which blocks → WINDSTREAM ARKANSAS, INC. 1691 BERRYVILLE AR
— 870-424 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MT HOME AR
— 870-425 not yet reported which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 MT HOME AR
— 870-426 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 OMAHA AR
— 870-427 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 PYATT AR
— 870-428 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 DEER AR
— 870-429 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 WESTERNGRV AR
— 870-430 4XXX8XXX · 2 holders which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 WHITEVILLE AR
— 870-431 none assigned yet which blocks → BRIGHTSPEED OF NORTHERN ARKANSAS, LLC 1711 LAKEVIEW AR
— 870-432 0XXX1XXX4XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLC - AR 348F PRESCOTT AR
— 870-434 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 MOUNTJUDEA AR
— 870-435 not yet reported which blocks → YELCOT TEL. CO. 1733 GASSVILLE AR
— 870-436 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 LEAD HILL AR
— 870-437 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 ALPENA AR
— 870-438 not yet reported which blocks → WINDSTREAM ARKANSAS, INC. 1691 GREEN FOR AR
— 870-439 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 ST JOE AR
— 870-442 0XXX2XXX3XXX4XXX5XXX7XXX8XXX · 7 holders which blocks → SOUTHWESTERN BELL 9533 CHERRY VLY AR
— 870-443 0XXX2XXX3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AR 6805 MONTICELLO AR
— 870-445 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 BULLSHOALS AR
— 870-446 not yet reported which blocks → TRI-COUNTY TEL. CO., INC. 1726 JASPER 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
— 870-449 not yet reported which blocks → YELCOT TEL. CO. 1733 YELLVILLE AR
— 870-451 0XXX5XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 NASHVILLE AR
— 870-453 not yet reported which blocks → NORTHERN ARKANSAS TEL. CO. 1713 FLIPPIN AR
— 870-457 0XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → BRIGHTSPEED OF CENTRAL ARKANSAS, LLC 1144 WHEATLEY 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.