NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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, all time — NPA 641
WINDSTREAM IOWA COMMUNICATIONS, INC. 60
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 46
UNITED STATES CELLULAR - IA 39
WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 32
QWEST CORPORATION 30
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
— 641-662 not yet reported which blocks → FARMERS TEL. CO. 1175 BATAVIA IA
— 641-664 not yet reported which blocks → CITIZENS MUTUAL TELEPHONE COOPERATIVE 1129 BLOOMFIELD IA
— 641-667 4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 OLLIE IA
— 641-670 2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OSKALOOSA IA
— 641-672 4XXX5XXX6XXX7XXX · 4 holders which blocks → QWEST CORPORATION 9631 OSKALOOSA IA
— 641-673 not yet reported which blocks → QWEST CORPORATION 9631 OSKALOOSA IA
— 641-675 not yet reported which blocks → CITIZENS MUTUAL TELEPHONE COOPERATIVE 1129 PULASKI IA
— 641-678 not yet reported which blocks → SEARSBORO TEL. CO., INC. 1292 SEARSBORO IA
— 641-680 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 OTTUMWA IA
— 641-682 not yet reported which blocks → QWEST CORPORATION 9631 OTTUMWA IA
— 641-683 not yet reported which blocks → QWEST CORPORATION 9631 OTTUMWA IA
— 641-684 not yet reported which blocks → QWEST CORPORATION 9631 OTTUMWA IA
— 641-692 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 ALEXANDER IA
— 641-693 0XXX5XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LIBERTYVL IA
— 641-696 not yet reported which blocks → FARMERS TEL. CO. 1177 PLYMOUTH IA
— 641-700 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 641-705 1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks → MCC TELEPHONY OF IOWA, LLC - IA 751F ELMA IA
— 641-710 0XXX6XXX9XXX · 3 holders which blocks → OMNITEL COMMUNICATIONS, INC. - IA 3620 STACYVILLE IA
— 641-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 641-712 not yet reported which blocks → IA
— 641-713 6XXX7XXX9XXX which blocks → OMNITEL COMMUNICATIONS, INC. - IA 3620 ST ANSGAR IA
— 641-717 1XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → ONVOY, LLC - IA 221F COULTER IA
— 641-722 not yet reported which blocks → CITIZENS MUTUAL TELEPHONE COOPERATIVE 1129 DRAKESVL IA
— 641-724 2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MORAVIA IA
— 641-726 0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MELROSE IA
— 641-728 2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PERU IA
— 641-732 0XXX2XXX7XXX8XXX9XXX · 5 holders which blocks → QWEST CORPORATION 9631 OSAGE IA
— 641-734 2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 DIAGONAL IA
— 641-736 3XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 ST ANSGAR IA
— 641-737 0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 STACYVILLE IA
— 641-740 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CASEY IA
— 641-741 not yet reported which blocks → KILLDUFF TELEPHONE COMPANY 747C KILLDUFF IA
— 641-742 2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 ADAIR IA
— 641-743 4XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GREENFIELD IA
— 641-744 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 LINDEN IA
— 641-745 9XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 FONTANELLE IA
— 641-746 not yet reported which blocks → CASEY MUTUAL TEL. CO. 1119 CASEY IA
— 641-747 4XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 GUTHRIECTR IA
— 641-748 not yet reported which blocks → WINNEBAGO COOP. TEL. ASSN. - IA 1337 GRAFTON IA
— 641-749 not yet reported which blocks → FARMERS MUTUAL TEL. CO. NORA SPRINGS 1172 NORA SPG IA
— 641-750 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 MARSHALLTN IA
— 641-751 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 MARSHALLTN IA
— 641-755 not yet reported which blocks → PANORA COMMUNICATIONS COOPERATIVE 1271 PANORA IA
— 641-756 not yet reported which blocks → FARMERS MUTUAL TEL. CO. NORA SPRINGS 1172 ROCKFORD IA
— 641-757 5XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 PANORA IA
— 641-762 not yet reported which blocks → COMMUNICATIONS 1 NETWORKS, INC. 1262 KANAWHA IA
— 641-763 not yet reported which blocks → SOUTH CENTRAL COMMUNICATIONS, INC. 1094 LORIMOR IA
— 641-764 3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 MARTENSDL IA
— 641-765 not yet reported which blocks → FMTC-I35, INC. D/B/A OMNITEL COMMUNICATIONS 1209 TRURO IA
— 641-766 2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LUCAS IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.