Recent prefix assignments

334 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/28/2026

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 19

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
—	608-697	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	PORTAGE	WI
—	608-698	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MADISON	WI
—	608-700	not yet reported which blocks →				WI
—	608-707	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	MADISON	WI
—	608-711	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	608-712	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	MADISON	WI
—	608-713	1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	BELOIT	WI
—	608-718	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	JANESVILLE	WI
—	608-723	8XXX9XXX which blocks →	FARMERS TEL. CO.	0880	LANCASTER	WI
—	608-725	3XXX7XXX9XXX · 3 holders which blocks →	FARMERS TEL. CO.	0880	CASSVILLE	WI
—	608-727	4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRONTIER NORTH INC. - WI	0886	LOGANVILLE	WI
—	608-728	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC WI	7216	JANESVILLE	WI
—	608-732	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	PLATTEVL	WI
—	608-734	7XXX which blocks →	TELEPHONE USA OF WISCONSIN, LLC DBA CENTURYLINK	1155	SENECA	WI
—	608-735	not yet reported which blocks →	RICHLAND-GRANT TEL. COOP., INC.	0942	GAYS MILLS	WI
—	608-738	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	BRIGHTSPEED OF WISCONSIN, LLC	0895	LA CROSSE	WI
—	608-739	0XXX1XXX2XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	MUSCODA	WI
—	608-741	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-742	not yet reported which blocks →	FRONTIER NORTH INC. - WI	0886	PORTAGE	WI
—	608-743	9XXX which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-744	not yet reported which blocks →	CUBA CITY TEL. EXCH. CO., INC.	0872	CUBA CITY	WI
—	608-745	2XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	PORTAGE	WI
—	608-748	2XXX3XXX · 2 holders which blocks →	CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL	1183	FAIRPLAY	WI
—	608-750	not yet reported which blocks →	TDS METROCOM, LLC	520K	JANESVILLE	WI
—	608-751	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	JANESVILLE	WI
—	608-752	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-753	3XXX5XXX7XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	ARENA	WI
—	608-754	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-755	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-756	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-757	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-758	not yet reported which blocks →	WISCONSIN BELL INC	9327	JANESVILLE	WI
—	608-759	0XXX which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	BENTON	WI
—	608-762	not yet reported which blocks →	BELMONT TEL. CO.	0847	BELMONT	WI
—	608-763	8XXX9XXX · 2 holders which blocks →	FARMERS TEL. CO.	0880	POTOSI	WI
—	608-764	0XXX3XXX4XXX6XXX9XXX · 3 holders which blocks →	FRONTIER NORTH INC. - WI	0886	DEERFIELD	WI
—	608-766	0–9 XXXall 10 · 8 holders which blocks →	ONVOY, LLC - WI	225C	ELROY	WI
—	608-767	6XXX7XXX · 2 holders which blocks →	BLACK EARTH TEL. CO.	0849	BLACKEARTH	WI
—	608-768	not yet reported which blocks →	ONVOY, LLC - WI	225C	REEDSBURG	WI
—	608-769	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	LA CROSSE	WI
—	608-770	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MADISON	WI
—	608-772	7XXX8XXX9XXX which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MADISON	WI
—	608-774	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	JANESVILLE	WI
—	608-775	not yet reported which blocks →	BRIGHTSPEED OF WISCONSIN, LLC	0895	LA CROSSE	WI
—	608-776	not yet reported which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	DARLINGTON	WI
—	608-778	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	PLATTEVL	WI
—	608-779	not yet reported which blocks →	BRIGHTSPEED OF WISCONSIN, LLC	0895	LA CROSSE	WI
—	608-780	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	LA CROSSE	WI
—	608-781	not yet reported which blocks →	BRIGHTSPEED OF WISCONSIN, LLC	0895	LA CROSSE	WI
—	608-782	not yet reported which blocks →	BRIGHTSPEED OF WISCONSIN, LLC	0895	LA CROSSE	WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/28/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.