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
—	641-522	not yet reported which blocks →	BROOKLYN MUTUAL TEL. CO.	1113	BROOKLYN	IA
—	641-524	not yet reported which blocks →	COON VALLEY COOP. TEL. ASSN., INC.	1137	MENLO	IA
—	641-525	2XXX5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CLEAR LAKE	IA
—	641-526	not yet reported which blocks →	PARTNER COMMUNICATIONS COOPERATIVE	1187	KELLOGG	IA
—	641-527	not yet reported which blocks →	LYNNVILLE TELEPHONE COMPANY	1232	LYNNVILLE	IA
—	641-528	0XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	MALCOM	IA
—	641-529	8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CLEAR LAKE	IA
—	641-530	4XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	MASON CITY	IA
—	641-533	not yet reported which blocks →	GRAND RIVER MUTUAL TEL CO	1888	DERBY	IA
—	641-534	2XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	LACONA	IA
—	641-535	0XXX3XXX5XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	RUSSELL	IA
—	641-541	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	SIGOURNEY	IA
—	641-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	IA
—	641-561	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	BUFFALOCTR	IA
—	641-562	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	BUFFALOCTR	IA
—	641-563	not yet reported which blocks →				IA
—	641-565	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	CRYSTAL LK	IA
—	641-566	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	RAKE	IA
—	641-567	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	LELAND	IA
—	641-568	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	SCARVILLE	IA
—	641-579	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF IOWA, INC.	1127	LATIMER	IA
—	641-580	1XXX2XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	LATIMER	IA
—	641-581	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	FORESTCITY	IA
—	641-582	0XXX6XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	FORESTCITY	IA
—	641-584	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	THOMPSON	IA
—	641-585	not yet reported which blocks →	WINNEBAGO COOPERATIVE TELEPHONE ASSOCIATION - IA	6103	FORESTCITY	IA
—	641-586	4XXX5XXX6XXX8XXX · 2 holders which blocks →	CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN	1123	SOUTHADAMS	IA
—	641-587	not yet reported which blocks →	COMMUNICATIONS 1 NETWORKS, INC.	1262	KLEMME	IA
—	641-588	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	JOICE	IA
—	641-590	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	JOICE	IA
—	641-591	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	LAKE MILLS	IA
—	641-592	not yet reported which blocks →	WINNEBAGO COOP. TEL. ASSN. - IA	1337	LAKE MILLS	IA
—	641-593	not yet reported which blocks →	SEARSBORO TEL. CO., INC.	1292	SEARSBORO	IA
—	641-594	not yet reported which blocks →	SULLY TEL. ASSN.	1306	SULLY	IA
—	641-595	not yet reported which blocks →	WINDSTREAM MONTEZUMA, LLC	1248	DEEP RIVER	IA
—	641-596	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	JOICE	IA
—	641-611	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	641-613	2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LOCAL TELEPHONE DATA SERVICES CORP.	2842	PELLA	IA
—	641-620	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PELLA	IA
—	641-621	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PELLA	IA
—	641-622	4XXX6XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	SIGOURNEY	IA
—	641-623	not yet reported which blocks →	WINDSTREAM MONTEZUMA, LLC	1248	MONTEZUMA	IA
—	641-624	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	DELTA	IA
—	641-625	2XXX3XXX5XXX6XXX7XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PEORIA	IA
—	641-626	2XXX6XXX7XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	LEIGHTON	IA
—	641-627	2XXX3XXX4XXX6XXX7XXX8XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	OTLEY	IA
—	641-628	not yet reported which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	PELLA	IA
—	641-629	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	PELLA	IA
—	641-632	0XXX1XXX2XXX3XXX4XXX6XXX7XXX9XXX · 3 holders which blocks →	QWEST CORPORATION	9631	ROSE HILL	IA
—	641-634	7XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	WHAT CHEER	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.