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
—	641-829	not yet reported which blocks →	VENTURA TEL. CO., INC.	1322	VENTURA	IA
—	641-831	1XXX2XXX6XXX7XXX8XXX · 2 holders which blocks →	T-MOBILE USA, INC.	6529	NEWTON	IA
—	641-840	4XXX5XXX7XXX8XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	NEWTON	IA
—	641-841	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 9 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	NEWTON	IA
—	641-842	none assigned yet which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	KNOXVILLE	IA
—	641-843	0XXX6XXX7XXX8XXX · 4 holders which blocks →	QWEST CORPORATION	9631	BRITT	IA
—	641-844	3XXX4XXX7XXX8XXX · 2 holders which blocks →	QWEST CORPORATION	9631	MARSHALLTN	IA
—	641-845	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	KENSETT	IA
—	641-847	0XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	ACKLEY	IA
—	641-853	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	ROWAN	IA
—	641-856	7XXX9XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	CENTERVL	IA
—	641-857	not yet reported which blocks →	DUMONT TEL. CO.	1152	DUMONT	IA
—	641-858	0XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	ELDORA	IA
—	641-860	2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	BRITT	IA
—	641-861	not yet reported which blocks →	T-MOBILE USA, INC.	6529	PELLA	IA
—	641-862	2XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	WILLIAMSON	IA
—	641-863	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	BRITT	IA
—	641-864	not yet reported which blocks →	HUBBARD COOP. TEL. ASSN.	1203	HUBBARD	IA
—	641-866	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	COULTER	IA
—	641-868	6XXX8XXX · 2 holders which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	STEAMBOTRK	IA
—	641-869	7XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	WELLSBURG	IA
—	641-870	none assigned yet which blocks →	IOWA RSA 2 LIMITED PARTNERSHIP DBA CHAT MOBILITY	9572	CORYDON	IA
—	641-871	2XXX3XXX6XXX7XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	KNOXVILLE	IA
—	641-872	not yet reported which blocks →	SOUTH CENTRAL COMMUNICATIONS, INC.	1094	CORYDON	IA
—	641-873	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	ALLERTON	IA
—	641-874	2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PROMISE CY	IA
—	641-876	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	LINEVILLE	IA
—	641-877	5XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	HUMESTON	IA
—	641-881	7XXX8XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	LATIMER	IA
—	641-888	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	GRINNELL	IA
—	641-891	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	KNOXVILLE	IA
—	641-892	1XXX2XXX3XXX5XXX6XXX9XXX · 5 holders which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	SHEFFIELD	IA
—	641-894	not yet reported which blocks →	ROCKWELL COOP. TEL. ASSN.	1282	AREDALE	IA
—	641-895	8XXX9XXX which blocks →	UNITED STATES CELLULAR - IA	6266	CENTERVL	IA
—	641-896	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	HANLONTOWN	IA
—	641-897	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	MILLERTON	IA
—	641-898	3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	SEYMOUR	IA
—	641-911	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-919	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	FAIRFIELD	IA
—	641-920	not yet reported which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	STEAMBOTRK	IA
—	641-922	not yet reported which blocks →	HEART OF IOWA COMMUNICATIONS COOPERATIVE - IA	1297	CONRAD	IA
—	641-923	1XXX7XXX8XXX · 3 holders which blocks →	QWEST CORPORATION	9631	GARNER	IA
—	641-926	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	WODEN	IA
—	641-927	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	MILLER	IA
—	641-929	not yet reported which blocks →	CITIZENS MUTUAL TELEPHONE COOPERATIVE	1129	MARK	IA
—	641-932	0XXX4XXX6XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	ALBIA	IA
—	641-933	0XXX2XXX3XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	FREMONT	IA
—	641-934	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	BLADENSBG	IA
—	641-935	3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	CHILLICOTH	IA
—	641-936	2XXX3XXX5XXX6XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	DOUDS	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.