NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 712
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 68
QWEST CORPORATION 64
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 48
NEW CINGULAR WIRELESS PCS, LLC - IL 43
ONVOY, LLC - IA 30
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
— 712-337 1XXX2XXX4XXX5XXX6XXX7XXX9XXX · 7 holders which blocks → QWEST CORPORATION 9631 ARNOLDS PK IA
— 712-338 0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 MILFORD IA
— 712-339 2XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SPIRITLAKE IA
— 712-341 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATLOCK IA
— 712-342 not yet reported which blocks → ADVANCED NETWORK COMMUNICATIONS, LLC 7458 CORECTINVL IA
— 712-343 7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 AVOCA IA
— 712-344 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SHELDON IA
— 712-347 not yet reported which blocks → QWEST CORPORATION 9631 CARTERLAKE IA
— 712-348 7XXX8XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MATLOCK IA
— 712-349 0XXX3XXX4XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HARRIS IA
— 712-350 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - IA 6266 HAMBURG IA
— 712-351 3XXX7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAVELOCK IA
— 712-352 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-353 0XXX7XXX · 2 holders which blocks → WESTERN IOWA TEL. ASSN. 1334 CASTANA IA
— 712-358 4XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 HAVELOCK IA
— 712-359 not yet reported which blocks → PALMER MUTUAL TEL. CO. 1270 PALMER IA
— 712-362 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9631 ESTHERVL IA
— 712-363 8XXX9XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SPENCER IA
— 712-364 1XXX5XXX6XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 IDA GROVE IA
— 712-365 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 BATTLE CRK IA
— 712-366 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-367 not yet reported which blocks → SAC COUNTY MUTUAL TEL. CO. 1285 ARTHUR IA
— 712-368 1XXX3XXX5XXX6XXX7XXX · 5 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 HOLSTEIN IA
— 712-369 2XXX4XXX · 2 holders which blocks → TELNYX LLC 073H IDA GROVE IA
— 712-370 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 RED OAK IA
— 712-371 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 IDA GROVE IA
— 712-372 0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 CORECTINVL IA
— 712-373 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9631 ANTHON IA
— 712-374 0XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 SIDNEY IA
— 712-375 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 PIERSON IA
— 712-376 not yet reported which blocks → WEST IOWA TEL. CO. 1331 MARCUS IA
— 712-378 5XXX6XXX8XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 KINGSLEY IA
— 712-379 not yet reported which blocks → FARMERS TEL. CO. 1176 ESSEX IA
— 712-380 1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 8 holders which blocks → UNITED STATES CELLULAR - IA 6266 ESTHERVL IA
— 712-382 0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9631 HAMBURG IA
— 712-384 not yet reported which blocks → SCHALLER TEL. CO. 1291 CUSHING IA
— 712-385 not yet reported which blocks → PRAIRIE TEL. CO., INC. 1344 FARRAGUT IA
— 712-386 not yet reported which blocks → SOUTHWEST TEL. EXCH., INC. 1301 IMOGENE IA
— 712-387 4XXX7XXX8XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 RIVERTON IA
— 712-388 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-389 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → AT&T - LOCAL 7421 SIOUX CITY IA
— 712-390 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 SIOUX RPD IA
— 712-393 not yet reported which blocks → BTC, INC. - IA 156C DENISON IA
— 712-402 not yet reported which blocks → IA
— 712-403 0XXX1XXX2XXX3XXX6XXX8XXX · 4 holders which blocks → ONVOY, LLC - IA 221F SHELDON IA
— 712-411 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 712-420 7XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ONAWA IA
— 712-423 0XXX4XXX5XXX6XXX · 3 holders which blocks → QWEST CORPORATION 9631 ONAWA IA
— 712-424 0XXX2XXX4XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CYLINDER IA
— 712-425 0XXX2XXX4XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MALLARD IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.