Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

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. 39

NEW CINGULAR WIRELESS PCS, LLC - IL 28

ONVOY, LLC - CA 27

NEW CINGULAR WIRELESS PCS, LLC - DC 26

ONVOY, LLC - NJ 20

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
—	715-538	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
—	715-575	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	STEVENS PT	WI
—	715-576	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	WAUSAU	WI
—	715-577	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-579	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-581	not yet reported which blocks →	NEW CELL DBA CELLCOM	6692	WAUSAU	WI
—	715-582	7XXX which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	PESHTIGO	WI
—	715-583	0XXX3XXX5XXX8XXX9XXX · 5 holders which blocks →	BRIGHTSPEED OF NORTHERN WISCONSIN, LLC	0956	SPRINGSTED	WI
—	715-584	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	SHAWANO	WI
—	715-585	5XXX9XXX · 2 holders which blocks →	BRIGHTSPEED OF NORTHERN WISCONSIN, LLC	0956	HAWKINS	WI
—	715-586	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	OSSEO	WI
—	715-587	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MARINETTE	WI
—	715-588	5XXX8XXX · 2 holders which blocks →	FRONTIER NORTH INC. - WI	0886	LCDFLAMBEU	WI
—	715-589	8XXX which blocks →	NIAGARA TEL. CO.	0920	AURORA	WI
—	715-590	none assigned yet which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-591	1XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks →	CENTRAL STATE TEL. CO	0859	MILL CREEK	WI
—	715-592	not yet reported which blocks →	AMHERST TEL. CO.	0843	POLONIA	WI
—	715-594	not yet reported which blocks →	HAGER TELECOM, INC.	0889	BAY CITY	WI
—	715-595	3XXX5XXX · 2 holders which blocks →	BRIGHTSPEED OF NORTHERN WISCONSIN, LLC	0956	HOLCOMBE	WI
—	715-597	0XXX4XXX7XXX9XXX · 2 holders which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	OSSEO	WI
—	715-601	0XXX1XXX2XXX3XXX6XXX7XXX8XXX · 3 holders which blocks →	ONVOY, LLC - WI	225C	MONDOVI	WI
—	715-603	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PRESCOTT	WI
—	715-604	4XXX9XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MANISHWTRS	WI
—	715-605	6XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BOULDERJCT	WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.