Recent prefix assignments

1 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, last 30 days — NPA 515

ONVOY, LLC - IA 1

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

Recent NPA-NXX prefix assignments
Assigned	NPA-NXX	Thousands-blocks taken (last-4 opening)	Code holder	OCN	Rate center	State
—	515-708	5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	AMES	IA
—	515-709	1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BOONE	IA
—	515-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	515-720	3XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
—	515-725	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-727	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-729	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	DES MOINES	IA
—	515-731	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PLEASANTVL	IA
—	515-733	0XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	STORY CITY	IA
—	515-735	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	AMES	IA
—	515-738	0XXX3XXX4XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	GRAND JCT	IA
—	515-758	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	EARLHAM	IA
—	515-761	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PLEASANTVL	IA
—	515-769	not yet reported which blocks →	HUXLEY COMMUNICATIONS COOPERATIVE	1205	KELLEY	IA
—	515-770	not yet reported which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-771	not yet reported which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-778	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-779	not yet reported which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-789	0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	DEXTER	IA
—	515-795	5XXX6XXX7XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	MADRID	IA
—	515-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	515-817	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9631	AMES	IA
—	515-824	0XXX2XXX4XXX5XXX6XXX7XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IA	9877	RENWICK	IA
—	515-825	7XXX8XXX which blocks →	GOLDFIELD TEL. CO.	1188	GOLDFIELD	IA
—	515-826	not yet reported which blocks →	COOPERATIVE TEL. EXCH.	1303	STANHOPE	IA
—	515-827	0XXX2XXX3XXX4XXX7XXX8XXX · 2 holders which blocks →	QWEST CORPORATION	9631	JEWELL	IA
—	515-830	not yet reported which blocks →	IOWA NETWORK SVCS INC DBA AUREON NTWK SVCS, INC.	8858	DES MOINES	IA
—	515-832	0XXX which blocks →	QWEST CORPORATION	9631	WEBSTER CY	IA
—	515-833	0XXX4XXX5XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	REDFIELD	IA
—	515-834	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	DE SOTO	IA
—	515-835	3XXX4XXX5XXX6XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	WEBSTER CY	IA
—	515-836	not yet reported which blocks →	ELLSWORTH COOP. TEL. ASSN.	1157	ELLSWORTH	IA
—	515-838	not yet reported which blocks →	STRATFORD MUTUAL TEL. CO.	1305	STRATFORD	IA
—	515-839	not yet reported which blocks →	WOOLSTOCK MUTUAL TEL. ASSN.	1342	WOOLSTOCK	IA
—	515-846	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	BOXHOLM	IA
—	515-848	4XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PLEASANTVL	IA
—	515-851	3XXX4XXX6XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CLARION	IA
—	515-852	0XXX2XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	DOWS	IA
—	515-854	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9631	WILLIAMS	IA
—	515-855	0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	BUCKEYE	IA
—	515-859	2XXX4XXX5XXX6XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	ALDEN	IA
—	515-865	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-867	0XXX1XXX3XXX4XXX6XXX7XXX8XXX9XXX which blocks →	T-MOBILE USA, INC.	6529	DES MOINES	IA
—	515-879	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	LANYON	IA
—	515-882	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	LUVERNE	IA
—	515-883	0XXX which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-884	1XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	WHITTEMORE	IA
—	515-885	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	BANCROFT	IA
—	515-886	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	LAKOTA	IA
—	515-887	not yet reported which blocks →	NORTHWEST TEL. COOP. ASSN.	1261	WEST BEND	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.