Recent prefix assignments

1 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, 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
—	515-288	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-289	6XXX which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-290	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	AMES	IA
—	515-291	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	AMES	IA
—	515-292	not yet reported which blocks →	QWEST CORPORATION	9631	AMES	IA
—	515-294	not yet reported which blocks →	QWEST CORPORATION	9631	AMES	IA
—	515-295	0XXX which blocks →	QWEST CORPORATION	9631	ALGONA	IA
—	515-296	not yet reported which blocks →	QWEST CORPORATION	9631	AMES	IA
—	515-299	0XXX which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-309	not yet reported which blocks →	PAETEC ITEL, LLC	829J	DES MOINES	IA
—	515-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	515-312	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-313	0XXX1XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	AT&T - LOCAL	7421	DES MOINES	IA
—	515-314	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
—	515-319	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-320	7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	ALGONA	IA
—	515-321	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
—	515-323	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-325	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9631	BLAIRSBURG	IA
—	515-327	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-328	0XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	RANDALL	IA
—	515-331	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-332	0XXX6XXX8XXX · 2 holders which blocks →	QWEST CORPORATION	9631	HUMBOLDT	IA
—	515-334	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-341	8XXX9XXX · 2 holders which blocks →	UNITED STATES CELLULAR - IA	6266	ALGONA	IA
—	515-348	0–9 XXXall 10 · 6 holders which blocks →	AUREON COMMUNICATIONS, LLC	444G	DES MOINES	IA
—	515-351	2XXX3XXX4XXX5XXX6XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	GOWRIE	IA
—	515-352	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	GOWRIE	IA
—	515-353	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	PILOTMOUND	IA
—	515-354	not yet reported which blocks →	LEHIGH VALLEY COOP. TEL. ASSN.	1225	HARCOURT	IA
—	515-356	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	VINCENT	IA
—	515-359	not yet reported which blocks →	LEHIGH VALLEY COOP. TEL. ASSN.	1225	LEHIGH	IA
—	515-360	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
—	515-361	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	ALGONA	IA
—	515-362	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-365	not yet reported which blocks →	QWEST CORPORATION	9631	DES MOINES	IA
—	515-367	0XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	ELKHART	IA
—	515-368	5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	UNITED STATES CELLULAR - IA	6266	HUMBOLDT	IA
—	515-370	6XXX8XXX9XXX · 3 holders which blocks →	UNITED STATES CELLULAR - IA	6266	JEFFERSON	IA
—	515-371	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	DES MOINES	IA
—	515-372	not yet reported which blocks →	T-MOBILE USA, INC.	6529	BOONE	IA
—	515-373	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9631	GILMORE CY	IA
—	515-374	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PLEASANTVL	IA
—	515-375	0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	BRADGATE	IA
—	515-378	not yet reported which blocks →	WEBSTER-CALHOUN COOP. TEL. ASSN.	1328	THOR	IA
—	515-379	0XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	LIVERMORE	IA
—	515-381	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - IA	9877	DES MOINES	IA
—	515-382	0XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	NEVADA	IA
—	515-383	0XXX3XXX5XXX7XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	CAMBRIDGE	IA
—	515-386	not yet reported which blocks →	JEFFERSON TEL. CO.	1212	JEFFERSON	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.