NumberResearch Membership · Data 09/25/2026

Recent prefix assignments

337 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/25/2026

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 25
U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 12
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
— 712-605 not yet reported which blocks → IA
— 712-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 712-621 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 RED OAK IA
— 712-622 not yet reported which blocks → PRAIRIE TEL. CO., INC. 1344 PACIFICJCT IA
— 712-623 0XXX1XXX · 2 holders which blocks → QWEST CORPORATION 9631 RED OAK IA
— 712-624 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 5 holders which blocks → QWEST CORPORATION 9631 MALVERN IA
— 712-625 0XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 RANDOLPH IA
— 712-626 0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 6 holders which blocks → T-MOBILE USA, INC. 6529 PRIMGHAR IA
— 712-627 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 WESTPHALIA IA
— 712-628 5XXX6XXX7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 THURMAN IA
— 712-629 0XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 TABOR IA
— 712-636 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 NEMAHA IA
— 712-642 0XXX1XXX6XXX7XXX8XXX · 3 holders which blocks → QWEST CORPORATION 9631 MISSOURVLY IA
— 712-643 3XXX6XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 DUNLAP IA
— 712-644 6XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 LOGAN IA
— 712-645 3XXX6XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MODALE IA
— 712-646 3XXX4XXX6XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MONDAMIN IA
— 712-647 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WOODBINE IA
— 712-648 4XXX7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MAGNOLIA IA
— 712-649 3XXX6XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 LTL SIOUX IA
— 712-651 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 BAYARD IA
— 712-652 2XXX which blocks → SCRANTON TEL. CO. 1294 SCRANTON IA
— 712-653 0XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MANNING IA
— 712-654 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 MANILLA IA
— 712-655 not yet reported which blocks → MANNING MUNICIPAL COMM AND TELVSN SYS UT - IA 3057 MANNING IA
— 712-656 0XXX3XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LANESBORO IA
— 712-657 4XXX5XXX6XXX7XXX9XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LAKE VIEW IA
— 712-658 3XXX4XXX5XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 HALBUR IA
— 712-659 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 GLIDDEN IA
— 712-660 6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 EARLY IA
— 712-661 1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 EARLY IA
— 712-662 1XXX5XXX8XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 SAC CITY IA
— 712-663 not yet reported which blocks → WESTSIDE INDEPENDENT TEL. CO. 1335 WESTSIDE IA
— 712-664 not yet reported which blocks → CORN BELT TEL. CO. 1141 WALL LAKE IA
— 712-667 2XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 RALSTON IA
— 712-668 not yet reported which blocks → SAC COUNTY MUTUAL TEL. CO. 1285 ODEBOLT IA
— 712-669 not yet reported which blocks → TEMPLETON TEL. CO. 1308 TEMPLETON IA
— 712-673 not yet reported which blocks → BREDA TEL. CORP. 1112 BREDA IA
— 712-674 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 DOW CITY IA
— 712-675 not yet reported which blocks → SCHALLER TEL. CO. 1291 KIRON IA
— 712-676 4XXX6XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SCHLESWIG IA
— 712-677 3XXX4XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 VAIL IA
— 712-678 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 CHARTEROAK IA
— 712-679 4XXX7XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 RICKETTS IA
— 712-682 3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN 1123 SO BIGELOW IA
— 712-683 2XXX3XXX4XXX6XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 DEDHAM IA
— 712-684 4XXX6XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 COONRAPIDS IA
— 712-688 3XXX4XXX5XXX6XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 AUBURN IA
— 712-689 not yet reported which blocks → WESTSIDE INDEPENDENT TEL. CO. 1335 ARCADIA IA
— 712-700 not yet reported which blocks → IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/25/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.