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
Download CSV ↓
Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 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
— 712-426 not yet reported which blocks → AYRSHIRE FARMERS MUTUAL TEL. CO. 1105 AYRSHIRE IA
— 712-428 not yet reported which blocks → NORTHWEST IOWA TELEPHONE, LLC 1260 SLOAN IA
— 712-431 4XXX8XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 ONAWA IA
— 712-433 not yet reported which blocks → COMMCHOICE OF IOWA, LLC 4092 ONAWA IA
— 712-434 not yet reported which blocks → PEOPLES TEL. CO. 1273 AURELIA IA
— 712-436 not yet reported which blocks → C-M-L TEL. COOP. ASSN. OF MERIDEN IOWA 1133 CLEGHORN IA
— 712-437 not yet reported which blocks → C-M-L TEL. COOP. ASSN. OF MERIDEN IOWA 1133 LARRABEE IA
— 712-438 0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CLARINDA IA
— 712-439 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 HULL IA
— 712-441 none assigned yet which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CTR IA
— 712-443 not yet reported which blocks → C-M-L TEL. COOP. ASSN. OF MERIDEN IOWA 1133 MERIDEN IA

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.