Recent prefix assignments

349 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/24/2026

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 31

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - IL 27

ONVOY, LLC - NJ 15

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
—	715-489	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	MATTOON	WI
—	715-490	7XXX8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	RHINELANDR	WI
—	715-491	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-492	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-493	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	RHINELANDR	WI
—	715-494	1XXX2XXX3XXX4XXX6XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OSCEOLA	WI
—	715-495	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-497	not yet reported which blocks →	AERIAL COMMUNICATIONS, INC.	6701	EAU CLAIRE	WI
—	715-498	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	STEVENS PT	WI
—	715-499	8XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	RHINELANDR	WI
—	715-505	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MENOMONIE	WI
—	715-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	715-518	5XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PARK FALLS	WI
—	715-519	2XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	CORNELL	WI
—	715-520	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SPOONER	WI
—	715-523	2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	AERIAL COMMUNICATIONS, INC.	6701	EAU CLAIRE	WI
—	715-524	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0964	SHAWANO	WI
—	715-526	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0964	SHAWANO	WI
—	715-528	6XXX which blocks →	NIAGARA TEL. CO.	0920	FLORENCE	WI
—	715-532	8XXX which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	LADYSMITH	WI
—	715-535	5XXX6XXX · 2 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0964	TIGERTON	WI
—	715-536	not yet reported which blocks →	FRONTIER NORTH INC. - WI	0886	MERRILL	WI
—	715-537	0XXX4XXX7XXX8XXX · 4 holders which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	BARRON	WI
—	715-538	3XXX5XXX7XXX9XXX · 3 holders which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	WHITEHALL	WI
—	715-539	6XXX7XXX · 2 holders which blocks →	FRONTIER NORTH INC. - WI	0886	MERRILL	WI
—	715-541	9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TURTLELAKE	WI
—	715-542	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	FRONTIER NORTH INC. - WI	0886	SAYNER	WI
—	715-543	0XXX1XXX3XXX5XXX · 4 holders which blocks →	BRIGHTSPEED OF NORTHERN WISCONSIN, LLC	0956	MANISHWTRS	WI
—	715-545	0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	FRONTIER NORTH INC. - WI	0886	PHELPS	WI
—	715-546	0XXX5XXX6XXX7XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	THREELAKES	WI
—	715-547	0XXX2XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks →	FRONTIER NORTH INC. - WI	0886	LANDOLAKES	WI
—	715-548	0XXX1XXX3XXX5XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PEMBINE	WI
—	715-549	0XXX1XXX2XXX3XXX4XXX9XXX · 6 holders which blocks →	WISCONSIN BELL INC	9327	HOULTON	WI
—	715-550	6XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	RHINELANDR	WI
—	715-551	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAUSAU	WI
—	715-552	not yet reported which blocks →	WISCONSIN BELL INC	9327	EAU CLAIRE	WI
—	715-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	WI
—	715-556	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MENOMONIE	WI
—	715-559	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EAU CLAIRE	WI
—	715-561	0XXX which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	HURLEY	WI
—	715-563	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-564	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BRIGHTSPEED OF NORTHERN WISCONSIN, LLC	0956	BRANTWOOD	WI
—	715-565	4XXX5XXX6XXX · 3 holders which blocks →	ONVOY, LLC - WI	225C	GLENWOODCY	WI
—	715-568	0XXX7XXX · 2 holders which blocks →	BLOOMER TEL. CO.	0850	BLOOMER	WI
—	715-569	7XXX8XXX9XXX · 3 holders which blocks →	CENTRAL STATE TEL. CO	0859	VESPER	WI
—	715-570	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STEVENS PT	WI
—	715-571	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAUSAU	WI
—	715-572	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STEVENS PT	WI
—	715-573	not yet reported which blocks →	NEW CELL DBA CELLCOM	6692	WAUSAU	WI
—	715-574	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WAUSAU	WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/24/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.