Recent prefix assignments

341 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/26/2026

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 26

Rogers Communications Canada Inc. (Wireless) 23

NEW CINGULAR WIRELESS PCS, LLC - IL 22

ONVOY, LLC - CA 21

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
—	641-439	not yet reported which blocks →	PANORA COMMUNICATIONS COOPERATIVE	1271	YALE	IA
—	641-442	5XXX6XXX which blocks →	GRAND RIVER MUTUAL TEL CO	1888	DAVIS CITY	IA
—	641-443	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	GARDEN GRV	IA
—	641-444	1XXX2XXX6XXX9XXX · 3 holders which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	BELMOND	IA
—	641-445	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	WELDON	IA
—	641-446	0XXX which blocks →	GRAND RIVER MUTUAL TEL CO	1888	LEON	IA
—	641-447	not yet reported which blocks →	SOUTH CENTRAL COMMUNICATIONS, INC.	1094	MURRAY	IA
—	641-449	2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	NEWVIRGINI	IA
—	641-452	2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	UNIONVILLE	IA
—	641-454	0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9631	MANLY	IA
—	641-456	6XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	HAMPTON	IA
—	641-458	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	GENEVA	IA
—	641-459	not yet reported which blocks →	CITIZENS MUTUAL TELEPHONE COOPERATIVE	1129	FLORIS	IA
—	641-464	5XXX6XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MOUNT AYR	IA
—	641-466	2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	LIBERTYCTR	IA
—	641-469	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	FAIRFIELD	IA
—	641-470	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	FAIRFIELD	IA
—	641-472	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	FAIRFIELD	IA
—	641-473	0XXX4XXX5XXX6XXX7XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	GLADBROOK	IA
—	641-474	none assigned yet which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	GREEN MT	IA
—	641-475	8XXX which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	HAVERHILL	IA
—	641-476	8XXX which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	LAUREL	IA
—	641-477	not yet reported which blocks →	MINERVA VALLEY TEL. CO., INC.	1246	CLEMONS	IA
—	641-478	8XXX which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	FERGUSON	IA
—	641-479	0XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	LE GRAND	IA
—	641-482	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	MELBOURNE	IA
—	641-483	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	STATE CTR	IA
—	641-484	0XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	TOLEDO	IA
—	641-485	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	MARSHALLTN	IA
—	641-486	not yet reported which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	UNION	IA
—	641-487	not yet reported which blocks →	MINERVA VALLEY TEL. CO., INC.	1246	ZEARING	IA
—	641-488	8XXX which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	ALBION	IA
—	641-489	3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	CHELSEA	IA
—	641-492	2XXX3XXX4XXX5XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	MONTOUR	IA
—	641-493	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	RHODES	IA
—	641-494	4XXX6XXX7XXX8XXX9XXX which blocks →	QWEST CORPORATION	9631	MASON CITY	IA
—	641-495	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	GOODELL	IA
—	641-496	not yet reported which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	LISCOMB	IA
—	641-497	not yet reported which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	NEWPROVDNC	IA
—	641-498	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	GILMAN	IA
—	641-499	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	GARWIN	IA
—	641-502	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	MELBOURNE	IA
—	641-503	0XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks →	ONVOY, LLC - IA	221F	MOUNT AYR	IA
—	641-504	not yet reported which blocks →	T-MOBILE USA, INC.	6529	OSKALOOSA	IA
—	641-507	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	BAXTER	IA
—	641-510	not yet reported which blocks →	T-MOBILE USA, INC.	6529	GRINNELL	IA
—	641-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-512	8XXX9XXX which blocks →	UNITED STATES CELLULAR - IA	6266	MASON CITY	IA
—	641-515	not yet reported which blocks →				IA
—	641-521	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	NEWTON	IA

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/26/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.