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
—	641-741	not yet reported which blocks →	KILLDUFF TELEPHONE COMPANY	747C	KILLDUFF	IA
—	641-742	2XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	ADAIR	IA
—	641-743	4XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	GREENFIELD	IA
—	641-744	3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	LINDEN	IA
—	641-745	9XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	FONTANELLE	IA
—	641-746	not yet reported which blocks →	CASEY MUTUAL TEL. CO.	1119	CASEY	IA
—	641-747	4XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	GUTHRIECTR	IA
—	641-748	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	GRAFTON	IA
—	641-749	not yet reported which blocks →	FARMERS MUTUAL TEL. CO. NORA SPRINGS	1172	NORA SPG	IA
—	641-750	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	MARSHALLTN	IA
—	641-751	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	MARSHALLTN	IA
—	641-755	not yet reported which blocks →	PANORA COMMUNICATIONS COOPERATIVE	1271	PANORA	IA
—	641-756	not yet reported which blocks →	FARMERS MUTUAL TEL. CO. NORA SPRINGS	1172	ROCKFORD	IA
—	641-757	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	PANORA	IA
—	641-762	not yet reported which blocks →	COMMUNICATIONS 1 NETWORKS, INC.	1262	KANAWHA	IA
—	641-763	not yet reported which blocks →	SOUTH CENTRAL COMMUNICATIONS, INC.	1094	LORIMOR	IA
—	641-764	3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MARTENSDL	IA
—	641-765	not yet reported which blocks →	FMTC-I35, INC. D/B/A OMNITEL COMMUNICATIONS	1209	TRURO	IA
—	641-766	2XXX3XXX4XXX5XXX7XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	LUCAS	IA
—	641-767	2XXX3XXX4XXX6XXX7XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	REDDING	IA
—	641-768	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MACKSBURG	IA
—	641-772	2XXX5XXX6XXX7XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	TINGLEY	IA
—	641-773	3XXX8XXX · 2 holders which blocks →	GRAND RIVER MUTUAL TEL CO	1888	GRANDRIVER	IA
—	641-774	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	CHARITON	IA
—	641-775	not yet reported which blocks →	ROCKWELL COOP. TEL. ASSN.	1282	BRISTOW	IA
—	641-777	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	OTTUMWA	IA
—	641-780	8XXX9XXX which blocks →	UNITED STATES CELLULAR - IA	6266	PELLA	IA
—	641-781	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	NEWTON	IA
—	641-782	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	CRESTON	IA
—	641-783	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	KELLERTON	IA
—	641-784	none assigned yet which blocks →	GRAND RIVER MUTUAL TEL CO	1888	LAMONI	IA
—	641-785	3XXX4XXX5XXX6XXX7XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	BENTON	IA
—	641-787	7XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	NEWTON	IA
—	641-788	4XXX8XXX · 2 holders which blocks →	GRAND RIVER MUTUAL TEL CO	1888	BLOCKTON	IA
—	641-790	1XXX7XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	SIGOURNEY	IA
—	641-791	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	NEWTON	IA
—	641-792	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	NEWTON	IA
—	641-793	not yet reported which blocks →	REASNOR TELEPHONE COMPANY, LLC	739D	REASNOR	IA
—	641-794	not yet reported which blocks →	ROCKWELL COOP. TEL. ASSN.	1282	DOUGHERTY	IA
—	641-797	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	FERTILE	IA
—	641-798	not yet reported which blocks →	KILLDUFF TELEPHONE COMPANY	747C	KILLDUFF	IA
—	641-799	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	OTTUMWA	IA
—	641-811	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-814	1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 5 holders which blocks →	LOCAL TELEPHONE DATA SERVICES CORP.	2842	OTTUMWA	IA
—	641-816	1XXX7XXX · 2 holders which blocks →	OMNITEL COMMUNICATIONS, INC. - IA	3620	GREENE	IA
—	641-820	2XXX3XXX4XXX6XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	KNOXVILLE	IA
—	641-821	2XXX which blocks →	METROPCS, INC.	5562	GRINNELL	IA
—	641-822	not yet reported which blocks →	ROCKWELL COOP. TEL. ASSN.	1282	ROCKWELL	IA
—	641-823	2XXX3XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	GREENE	IA
—	641-828	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	KNOXVILLE	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.