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
— 712-479 not yet reported which blocks → NORTHERN IOWA TEL. CO. 1259 LITTLEROCK IA
— 712-480 1XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks → UNITED STATES CELLULAR - IA 6266 EMMETSBURG IA
— 712-482 1XXX2XXX7XXX · 2 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 OAKLAND IA
— 712-483 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 MINDEN IA
— 712-484 1XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 CARSON IA
— 712-485 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9631 NEOLA IA
— 712-486 not yet reported which blocks → BREDA TEL. CORP. 1112 MACEDONIA IA
— 712-487 1XXX2XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 TREYNOR IA
— 712-488 4XXX5XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 PERSIA IA
— 712-489 4XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 PANAMA IA
— 712-490 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 SIOUX CITY IA
— 712-507 not yet reported which blocks → IA
— 712-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX IA
— 712-515 not yet reported which blocks → IA
— 712-520 5XXX6XXX8XXX9XXX · 3 holders which blocks → UNITED STATES CELLULAR - IA 6266 GLENWOOD IA
— 712-523 1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 BEDFORD IA
— 712-525 0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → QWEST CORPORATION 9631 SILVERCITY IA
— 712-526 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → QWEST CORPORATION 9631 MINEOLA IA
— 712-527 0XXX7XXX8XXX · 2 holders which blocks → QWEST CORPORATION 9631 GLENWOOD IA
— 712-529 0XXX2XXX3XXX6XXX8XXX9XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 PERCIVAL IA
— 712-533 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 BRUNSVILLE IA
— 712-534 not yet reported which blocks → IAMO COMMUNICATIONS, INC. 1206 NORTHBORO IA
— 712-537 3XXX7XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. 1178 GRAVITY IA
— 712-539 4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → UNITED STATES CELLULAR - IA 6266 LE MARS IA
— 712-540 not yet reported which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 LE MARS IA
— 712-541 2XXX3XXX4XXX5XXX6XXX7XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 LE MARS IA
— 712-542 none assigned yet which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 CLARINDA IA
— 712-544 4XXX5XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 SHELBY IA
— 712-545 0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → QWEST CORPORATION 9631 CRESCENT IA
— 712-546 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 LE MARS IA
— 712-548 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 LE MARS IA
— 712-549 not yet reported which blocks → MARNE & ELK HORN TEL. CO. 1237 BRAYTON IA
— 712-551 none assigned yet which blocks → HAWARDEN MUNICIPAL UTILITIES 8708 HAWARDEN IA
— 712-552 7XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 HAWARDEN IA
— 712-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST IA
— 712-562 not yet reported which blocks → FRONTIER COMMUNICATIONS OF IOWA, INC. 1127 STRUBLE IA
— 712-563 6XXX7XXX8XXX · 3 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 AUDUBON IA
— 712-566 0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → QWEST CORPORATION 9631 UNDERWOOD IA
— 712-567 not yet reported which blocks → NORTHERN IOWA TEL. CO. 1259 MAURICE IA
— 712-568 6XXX which blocks → HEARTLAND TELECO OF IA DBA PREMIER COMMUNICATIONS 1109 AKRON IA
— 712-571 8XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WESTPHALIA IA
— 712-579 3XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WESTPHALIA IA
— 712-580 not yet reported which blocks → SPENCER MUNICIPAL COMMUNICATION UTILITY 3390 SPENCER IA
— 712-581 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E SHENANDOAH IA
— 712-582 0XXX5XXX7XXX8XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 COLLEGESPG IA
— 712-583 not yet reported which blocks → IAMO COMMUNICATIONS, INC. 1206 COIN IA
— 712-585 not yet reported which blocks → FARMERS MUTUAL TELEPHONE COMPANY 1174 NEW MARKET IA
— 712-586 not yet reported which blocks → FARMERS MUTUAL TELEPHONE COMPANY 1174 BETHESDA IA
— 712-589 0XXX4XXX5XXX6XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH 1167 BRADDYVL IA
— 712-592 5XXX6XXX which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA 6570 WOODBINE 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.