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
—	641-635	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	HARPER	IA
—	641-636	4XXX5XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	KEOTA	IA
—	641-637	3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	NEW SHARON	IA
—	641-638	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	OSKALOOSA	IA
—	641-640	2XXX3XXX4XXX6XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	IOWA FALLS	IA
—	641-641	not yet reported which blocks →				IA
—	641-642	not yet reported which blocks →	FARMERS MUTUAL COOP. TEL. CO.	1169	MOULTON	IA
—	641-644	not yet reported which blocks →	BARNES CITY COOP. TEL. CO.	1108	BARNESCITY	IA
—	641-647	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MYSTIC	IA
—	641-648	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA FALLS	IA
—	641-649	3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PLANO	IA
—	641-651	3XXX7XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	PELLA	IA
—	641-652	0XXX2XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	ELDON	IA
—	641-653	0XXX3XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	HEDRICK	IA
—	641-655	2XXX3XXX4XXX5XXX6XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	FARSON	IA
—	641-656	0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MILTON	IA
—	641-658	3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	CINCINNATI	IA
—	641-660	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	OSKALOOSA	IA
—	641-661	3XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MARTINSBG	IA
—	641-662	not yet reported which blocks →	FARMERS TEL. CO.	1175	BATAVIA	IA
—	641-664	not yet reported which blocks →	CITIZENS MUTUAL TELEPHONE COOPERATIVE	1129	BLOOMFIELD	IA
—	641-667	4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	OLLIE	IA
—	641-670	2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	OSKALOOSA	IA
—	641-672	4XXX5XXX6XXX7XXX · 4 holders which blocks →	QWEST CORPORATION	9631	OSKALOOSA	IA
—	641-673	not yet reported which blocks →	QWEST CORPORATION	9631	OSKALOOSA	IA
—	641-675	not yet reported which blocks →	CITIZENS MUTUAL TELEPHONE COOPERATIVE	1129	PULASKI	IA
—	641-678	not yet reported which blocks →	SEARSBORO TEL. CO., INC.	1292	SEARSBORO	IA
—	641-680	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	OTTUMWA	IA
—	641-682	not yet reported which blocks →	QWEST CORPORATION	9631	OTTUMWA	IA
—	641-683	not yet reported which blocks →	QWEST CORPORATION	9631	OTTUMWA	IA
—	641-684	not yet reported which blocks →	QWEST CORPORATION	9631	OTTUMWA	IA
—	641-692	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	ALEXANDER	IA
—	641-693	0XXX5XXX6XXX7XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	LIBERTYVL	IA
—	641-696	not yet reported which blocks →	FARMERS TEL. CO.	1177	PLYMOUTH	IA
—	641-700	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-705	1XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	MCC TELEPHONY OF IOWA, LLC - IA	751F	ELMA	IA
—	641-710	0XXX6XXX9XXX · 3 holders which blocks →	OMNITEL COMMUNICATIONS, INC. - IA	3620	STACYVILLE	IA
—	641-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-712	not yet reported which blocks →				IA
—	641-713	6XXX7XXX9XXX which blocks →	OMNITEL COMMUNICATIONS, INC. - IA	3620	ST ANSGAR	IA
—	641-717	1XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	ONVOY, LLC - IA	221F	COULTER	IA
—	641-722	not yet reported which blocks →	CITIZENS MUTUAL TELEPHONE COOPERATIVE	1129	DRAKESVL	IA
—	641-724	2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MORAVIA	IA
—	641-726	0XXX2XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	MELROSE	IA
—	641-728	2XXX3XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PERU	IA
—	641-732	0XXX2XXX7XXX8XXX9XXX · 5 holders which blocks →	QWEST CORPORATION	9631	OSAGE	IA
—	641-734	2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	DIAGONAL	IA
—	641-736	3XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	ST ANSGAR	IA
—	641-737	0XXX3XXX4XXX6XXX7XXX8XXX · 6 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	STACYVILLE	IA
—	641-740	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CASEY	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.