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
—	319-442	not yet reported which blocks →	KEYSTONE FARMS COOP. TEL. CO.	1217	KEYSTONE	IA
—	319-443	not yet reported which blocks →	FARMERS MUTUAL TEL. CO.	1173	URBANA	IA
—	319-444	0XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	BELLEPLAIN	IA
—	319-446	not yet reported which blocks →	ATKINS TEL. CO., INC.	1101	ATKINS	IA
—	319-447	7XXX which blocks →	QWEST CORPORATION	9631	CEDAR RPDS	IA
—	319-448	0XXX2XXX3XXX5XXX6XXX8XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	WALKER	IA
—	319-450	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	CEDAR RPDS	IA
—	319-453	not yet reported which blocks →	FARMERS MUTUAL TEL. CO.	1173	SHELLSBURG	IA
—	319-454	5XXX which blocks →	SHELLSBURG CABLEVISION, INC.	1136	BLAIRSTOWN	IA
—	319-455	6XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS	1170	LISBON	IA
—	319-456	4XXX5XXX7XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	RICHLAND	IA
—	319-457	not yet reported which blocks →	T-MOBILE USA, INC.	6529	BURLINGTON	IA
—	319-458	1XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	WASHINGTON	IA
—	319-460	2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	WASHINGTON	IA
—	319-461	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	WASHINGTON	IA
—	319-462	0XXX1XXX7XXX8XXX9XXX · 4 holders which blocks →	QWEST CORPORATION	9631	ANAMOSA	IA
—	319-463	0XXX3XXX4XXX8XXX9XXX · 4 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	MONTROSE	IA
—	319-464	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	AT&T - LOCAL	7421	WATERLOO	IA
—	319-465	0XXX9XXX · 2 holders which blocks →	QWEST CORPORATION	9631	MONTICELLO	IA
—	319-466	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-467	not yet reported which blocks →	QWEST CORPORATION	9631	IOWA CITY	IA
—	319-469	0XXX5XXX6XXX8XXX · 2 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	HOUGHTON	IA
—	319-470	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	FT MADISON	IA
—	319-471	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	IOWA CITY	IA
—	319-472	0XXX1XXX7XXX8XXX · 2 holders which blocks →	QWEST CORPORATION	9631	VINTON	IA
—	319-474	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	BRANDON	IA
—	319-475	not yet reported which blocks →	LA PORTE CITY TEL. CO.	1220	MT AUBURN	IA
—	319-476	none assigned yet which blocks →	FARMERS COOP. TEL. CO.	1162	DYSART	IA
—	319-477	not yet reported which blocks →	KEYSTONE FARMS COOP. TEL. CO.	1217	GARRISON	IA
—	319-478	0XXX4XXX7XXX · 3 holders which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH	1167	TRAER	IA
—	319-479	not yet reported which blocks →	FARMERS COOP. TEL. CO.	1162	CLUTIER	IA
—	319-480	none assigned yet which blocks →	UNITED STATES CELLULAR - IA	6266	ANAMOSA	IA
—	319-481	2XXX3XXX4XXX5XXX6XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	ANAMOSA	IA
—	319-482	not yet reported which blocks →	MARTELLE COOP. TEL. ASSN.	1238	MARTELLE	IA
—	319-483	0XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	QWEST CORPORATION	9631	WAVERLY	IA
—	319-484	not yet reported which blocks →	OLIN TEL. CO., INC.	1264	OLIN	IA
—	319-489	not yet reported which blocks →	OLIN TEL. CO., INC.	1264	MORLEY	IA
—	319-491	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	AT&T - LOCAL	7421	CEDAR RPDS	IA
—	319-493	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	WATERLOO	IA
—	319-494	not yet reported which blocks →	VAN BUREN TEL. CO., INC.	1319	MTSTERLING	IA
—	319-498	not yet reported which blocks →	VAN BUREN TEL. CO., INC.	1319	BIRMINGHAM	IA
—	319-504	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	WATERLOO	IA
—	319-509	not yet reported which blocks →	T-MOBILE USA, INC.	6529	OELWEIN	IA
—	319-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	IA
—	319-512	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	IOWA CITY	IA
—	319-520	1XXX2XXX3XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA	6570	KEOKUK	IA
—	319-521	not yet reported which blocks →	T-MOBILE USA, INC.	6529	CEDAR RPDS	IA
—	319-523	7XXX which blocks →	WINDSTREAM IOWA COMMUNICATIONS, INC.	1178	WAPELLO	IA
—	319-524	not yet reported which blocks →	QWEST CORPORATION	9631	KEOKUK	IA
—	319-525	not yet reported which blocks →	COOPERATIVE TEL. CO.	1139	HARTWICK	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.