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
—	715-218	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	MERRILL	WI
—	715-221	not yet reported which blocks →	FRONTIER NORTH INC. - WI	0886	MARSHFIELD	WI
—	715-223	5XXX7XXX9XXX · 2 holders which blocks →	FRONTIER NORTH INC. - WI	0886	COLBY	WI
—	715-224	3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	TOMAHAWK	WI
—	715-225	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	EAU CLAIRE	WI
—	715-228	not yet reported which blocks →	UNION TEL. CO.	0962	COLOMA	WI
—	715-229	0XXX1XXX3XXX5XXX6XXX7XXX · 5 holders which blocks →	FRONTIER NORTH INC. - WI	0886	OWEN	WI
—	715-231	none assigned yet which blocks →	24-7 TELCOM, INC. - WI	4855	MENOMONIE	WI
—	715-232	not yet reported which blocks →	WISCONSIN BELL INC	9327	MENOMONIE	WI
—	715-233	8XXX which blocks →	WISCONSIN BELL INC	9327	MENOMONIE	WI
—	715-234	not yet reported which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	RICE LAKE	WI
—	715-235	not yet reported which blocks →	WISCONSIN BELL INC	9327	MENOMONIE	WI
—	715-236	9XXX which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	RICE LAKE	WI
—	715-237	not yet reported which blocks →	CITIZENS TEL. COOP., INC.	0863	NEW AUBURN	WI
—	715-238	2XXX4XXX6XXX · 3 holders which blocks →	BADGER TELECOM, INC.	0844	GRANTON	WI
—	715-239	1XXX2XXX5XXX9XXX · 3 holders which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	CORNELL	WI
—	715-241	1XXX which blocks →	FRONTIER NORTH INC. - WI	0886	WAUSAU	WI
—	715-243	4XXX5XXX9XXX · 2 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0944	NEWRICHMND	WI
—	715-244	2XXX4XXX7XXX · 3 holders which blocks →	BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC	0950	DAIRYLAND	WI
—	715-246	not yet reported which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0944	NEWRICHMND	WI
—	715-247	not yet reported which blocks →	SOMERSET TEL. CO., INC.	0951	SOMERSET	WI
—	715-248	0XXX2XXX5XXX6XXX8XXX · 2 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0944	STARPRAIRI	WI
—	715-249	not yet reported which blocks →	UNION TEL. CO.	0962	HANCOCK	WI
—	715-251	6XXX which blocks →	NIAGARA TEL. CO.	0920	NIAGARA	WI
—	715-252	0XXX5XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	STEVENS PT	WI
—	715-253	none assigned yet which blocks →	WITTENBERG TEL. CO.	0973	WITTENBERG	WI
—	715-254	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	PAETEC ITEL, LLC	829J	STEVENS PT	WI
—	715-255	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	LOYAL	WI
—	715-256	7XXX8XXX which blocks →	WISCONSIN BELL INC	9327	WAUPACA	WI
—	715-257	0XXX2XXX3XXX4XXX5XXX6XXX8XXX · 5 holders which blocks →	FRONTIER NORTH INC. - WI	0886	ATHENS	WI
—	715-258	not yet reported which blocks →	WISCONSIN BELL INC	9327	WAUPACA	WI
—	715-259	none assigned yet which blocks →	BRIGHTSPEED OF NORTHWEST WISCONSIN, LLC	0950	WEBB LAKE	WI
—	715-261	not yet reported which blocks →	FRONTIER NORTH INC. - WI	0886	WAUSAU	WI
—	715-262	2XXX6XXX · 2 holders which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	PRESCOTT	WI
—	715-263	7XXX which blocks →	CLEAR LAKE TEL. CO., INC.	0865	CLEAR LAKE	WI
—	715-264	0XXX1XXX5XXX7XXX · 3 holders which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	GLIDDEN	WI
—	715-265	2XXX3XXX5XXX8XXX which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	GLENWOODCY	WI
—	715-266	6XXX which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	WINTER	WI
—	715-267	0XXX2XXX8XXX · 3 holders which blocks →	BADGER TELECOM, INC.	0844	GREENWOOD	WI
—	715-268	not yet reported which blocks →	AMERY TELECOM, INC.	0842	AMERY	WI
—	715-269	not yet reported which blocks →	AMERY TELECOM, INC.	0842	DEER PARK	WI
—	715-270	not yet reported which blocks →	METRO SOUTHWEST PCS, LLP	9759	WAUPACA	WI
—	715-272	0XXX3XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0870	SUGAR CAMP	WI
—	715-273	7XXX8XXX9XXX · 2 holders which blocks →	WISCONSIN BELL INC	9327	ELLSWORTH	WI
—	715-274	1XXX7XXX8XXX9XXX · 3 holders which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	MELLEN	WI
—	715-275	0XXX1XXX2XXX6XXX7XXX8XXX · 6 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0870	ELCHO	WI
—	715-276	0XXX5XXX8XXX · 3 holders which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	LAKEWOOD	WI
—	715-277	6XXX7XXX8XXX · 3 holders which blocks →	FRONTIER COMMUNICATIONS OF WISCONSIN LLC	0870	LKTOMAHAWK	WI
—	715-278	none assigned yet which blocks →	CHEQUAMEGON COMMUNICATIONS COOPERATIVE, INC.	0860	MARENGO	WI
—	715-279	1XXX2XXX3XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DURAND	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.