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
— 712-660 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
— 712-707 not yet reported which blocks → ORANGE CITY COMMUNICATIONS, LLP - IA 9769 ORANGECITY IA
— 712-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 712-712 not yet reported which blocks → IA
— 712-722 not yet reported which blocks → MUTUAL TEL. CO. 1252 SIOUX CTR IA
— 712-723 not yet reported which blocks → C-M-L TEL. COOP. ASSN. OF MERIDEN IOWA 1133 ARCHER IA
— 712-724 7XXX8XXX9XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 ASHTON IA
— 712-725 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 BOYDEN IA
— 712-726 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 DOON IA
— 712-727 not yet reported which blocks → NORTHERN IOWA TEL. CO. 1259 GRANVILLE IA
— 712-728 0XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HARTLEY IA
— 712-729 not yet reported which blocks → NORTHERN IOWA TEL. CO. 1259 SANBORN IA
— 712-730 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → UNITED STATES CELLULAR - IA 6266 STORM LAKE IA
— 712-732 not yet reported which blocks → QWEST CORPORATION 9631 STORM LAKE IA
— 712-735 0XXX3XXX5XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MAY CITY IA
— 712-736 0XXX3XXX4XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MELVIN IA
— 712-737 7XXX9XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 ORANGECITY IA
— 712-738 not yet reported which blocks → NORTHERN IOWA TEL. CO. 1259 MATLOCK IA
— 712-741 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 HANCOCK IA
— 712-743 0XXX4XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 PORTSMOUTH IA
— 712-744 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 HARLAN IA
— 712-746 0XXX1XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → QWEST CORPORATION 9631 E HARRISBG IA
— 712-747 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 EARLING IA
— 712-748 not yet reported which blocks → FARMERS MUTUAL COOP. TEL. CO. 1168 DEFIANCE IA
— 712-749 0XXX8XXX9XXX · 2 holders which blocks → QWEST CORPORATION 9631 STORM LAKE IA
— 712-752 not yet reported which blocks → HOSPERS TEL. EXCH., INC. 1202 HOSPERS IA
— 712-753 not yet reported which blocks → ALLIANCE COMMUNICATIONS COOPERATIVE, INC. - IA 1405 INWOOD IA
— 712-754 not yet reported which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 SIBLEY IA
— 712-755 6XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 HARLAN IA
— 712-756 not yet reported which blocks → WEST IOWA TEL. CO. 1331 ALTON 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.