NumberResearch Membership · Data 09/23/2026

Recent prefix assignments

338 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/23/2026

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. 39
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - IL 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 15
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
— 712-279 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
— 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

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/23/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.