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
— 712-546 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
— 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

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.