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
— 712-277 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-278 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 IRETON IA
— 712-279 not yet reported which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-281 5XXX6XXX7XXX8XXX · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SIOUX CITY IA
— 712-282 not yet reported which blocks → SCHALLER TEL. CO. 1291 GALVA IA
— 712-283 0XXX1XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → QWEST CORPORATION 9631 SIOUX RPD IA
— 712-284 0XXX3XXX4XXX5XXX7XXX8XXX9XXX · 6 holders which blocks → QWEST CORPORATION 9631 ALTA IA
— 712-286 2XXX3XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 REMBRANDT IA
— 712-287 1XXX which blocks → EMBARQ MISSOURI, INC. DBA CENTURYLINK - MO 1811 NO HOPKINS IA
— 712-288 0XXX2XXX3XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 FONDA IA
— 712-289 3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MARATHON IA
— 712-291 2XXX3XXX4XXX7XXX8XXX9XXX · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 STORM LAKE IA
— 712-292 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CARROLL IA
— 712-293 none assigned yet which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-294 2XXX3XXX4XXX6XXX · 2 holders which blocks → QWEST CORPORATION 9631 SIOUX CITY IA
— 712-295 2XXX4XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PETERSON IA
— 712-296 2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LINN GROVE IA
— 712-297 0XXX2XXX3XXX4XXX6XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ROCKWELLCY IA
— 712-299 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 STORM LAKE IA
— 712-301 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → T-MOBILE USA, INC. 6529 SIOUX CITY IA
— 712-305 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 LE MARS IA
— 712-308 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 COUNCILBLF IA
— 712-309 1XXX2XXX5XXX6XXX8XXX which blocks → PAETEC ITEL, LLC 829J COUNCILBLF IA
— 712-311 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 712-314 0XXX2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COUNCILBLF IA
— 712-319 not yet reported which blocks → IA
— 712-320 8XXX which blocks → UNITED STATES CELLULAR - IA 6266 SPIRITLAKE IA
— 712-322 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-323 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-324 1XXX which blocks → QWEST CORPORATION 9631 SHELDON IA
— 712-325 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-326 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-327 7XXX8XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 RED OAK IA
— 712-328 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-329 not yet reported which blocks → QWEST CORPORATION 9631 COUNCILBLF IA
— 712-330 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SPIRITLAKE IA
— 712-332 0XXX1XXX4XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 ARNOLDS PK IA
— 712-335 0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → QWEST CORPORATION 9631 POCAHONTAS IA
— 712-336 not yet reported which blocks → QWEST CORPORATION 9631 SPIRITLAKE IA
— 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

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.