NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 319
QWEST CORPORATION 99
UNITED STATES CELLULAR - IA 39
T-MOBILE USA, INC. 39
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 39
WINDSTREAM IOWA COMMUNICATIONS, INC. 37
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
— 319-634 not yet reported which blocks → EAST BUCHANAN TEL. COOP. 1156 AURORA IA
— 319-635 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 FAIRBANK IA
— 319-636 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 HAZLETON IA
— 319-638 not yet reported which blocks → ORAN MUTUAL TEL. CO. 1266 ORAN IA
— 319-639 not yet reported which blocks → MODERN COOP. TEL. CO. 1247 KINROSS IA
— 319-640 2XXX3XXX4XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 CEDAR RPDS IA
— 319-642 0XXX4XXX6XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 MARENGO IA
— 319-643 not yet reported which blocks → WEST LIBERTY TEL. CO. 1332 WESTBRANCH IA
— 319-644 4XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 SOLON IA
— 319-645 0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 7 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 TIFFIN IA
— 319-646 not yet reported which blocks → WELLMAN COOP. TEL. ASSN. 1329 WELLMAN IA
— 319-647 not yet reported which blocks → COOPERATIVE TEL. CO. 1139 VICTOR IA
— 319-648 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 RIVERSIDE IA
— 319-651 0XXX2XXX which blocks → T-MOBILE USA, INC. 6529 CEDAR RPDS IA
— 319-653 not yet reported which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WASHINGTON IA
— 319-654 2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks → QWEST CORPORATION 9631 CEDAR RPDS IA
— 319-655 not yet reported which blocks → MODERN COOP. TEL. CO. 1247 MILLERSBG IA
— 319-656 not yet reported which blocks → KALONA COOP. TEL. CO. 1214 KALONA IA
— 319-657 0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 AINSWORTH IA
— 319-658 5XXX6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CRAWFODSVL IA
— 319-660 7XXX9XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WILLIAMSBG IA
— 319-661 1XXX2XXX3XXX6XXX9XXX · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WILLIAMSBG IA
— 319-662 0XXX2XXX3XXX6XXX7XXX · 4 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CONROY IA
— 319-664 not yet reported which blocks → NORTH ENGLISH COOP. TEL. CO. 1257 NO ENGLISH IA
— 319-665 not yet reported which blocks → SOUTH SLOPE COOP. TEL. CO., INC. 1298 NO LIBERTY IA
— 319-667 not yet reported which blocks → MODERN COOP. TEL. CO. 1247 SO ENGLISH IA
— 319-668 0XXX4XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 WILLIAMSBG IA
— 319-679 not yet reported which blocks → SHARON TEL. CO. 1293 HILLS IA
— 319-683 not yet reported which blocks → SHARON TEL. CO. 1293 SHARON CTR IA
— 319-685 not yet reported which blocks → COOPERATIVE TEL. CO. 1139 GUERNSEY IA
— 319-688 not yet reported which blocks → QWEST CORPORATION 9631 IOWA CITY IA
— 319-694 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 BRIGHTON IA
— 319-695 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 PACKWOOD IA
— 319-696 4XXX5XXX6XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LOCKRIDGE IA
— 319-698 0XXX3XXX5XXX6XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 W CHESTER IA
— 319-700 not yet reported which blocks → IA
— 319-711 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 319-721 none assigned yet which blocks → UNITED STATES CELLULAR - IA 6266 CEDAR RPDS IA
— 319-723 2XXX3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 NICHOLS IA
— 319-725 2XXX3XXX5XXX7XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 CONESVILLE IA
— 319-726 2XXX6XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 LETTS IA
— 319-728 9XXX which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 COLUMBSJCT IA
— 319-729 3XXX6XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 GRANDVIEW IA
— 319-730 not yet reported which blocks → PAETEC ITEL, LLC 829J CEDAR RPDS IA
— 319-731 not yet reported which blocks → PAETEC ITEL, LLC 829J CEDAR RPDS IA
— 319-734 1XXX2XXX · 2 holders which blocks → PAETEC ITEL, LLC 829J CEDAR RPDS IA
— 319-738 4XXX7XXX9XXX · 3 holders which blocks → MODERN COOP. TEL. CO. 1247 KESWICK IA
— 319-739 not yet reported which blocks → PAETEC ITEL, LLC 829J CEDAR RPDS IA
— 319-741 not yet reported which blocks → SHELLSBURG CABLEVISION, INC. 4189 MARENGO IA
— 319-743 2XXX5XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9631 CEDAR RPDS IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.