Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

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 — NPA 920

U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 1

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
—	920-250	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	NEW LONDON	WI
—	920-251	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	FONDDU LAC	WI
—	920-253	2XXX3XXX4XXX · 2 holders which blocks →	UNITED STATES CELLULAR - WI	6274	WATERTOWN	WI
—	920-254	none assigned yet which blocks →	METROPCS, INC.	5562	SHEBOYGAN	WI
—	920-257	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	WISCONSIN BELL INC	9327	APPLETON	WI
—	920-258	not yet reported which blocks →	SPOK, INC.	6630	OSHKOSH	WI
—	920-261	not yet reported which blocks →	WISCONSIN BELL INC	9327	WATERTOWN	WI
—	920-262	not yet reported which blocks →	WISCONSIN BELL INC	9327	WATERTOWN	WI
—	920-263	8XXX9XXX · 2 holders which blocks →	NEW CELL DBA CELLCOM	6692	FONDDU LAC	WI
—	920-264	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	GREEN BAY	WI
—	920-266	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	WISCONSIN BELL INC	9327	FONDDU LAC	WI
—	920-269	0XXX3XXX6XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	LOMIRA	WI
—	920-271	not yet reported which blocks →	TDS METROCOM, LLC	520K	GREEN BAY	WI
—	920-272	not yet reported which blocks →	NET LEC, INC.	6183	GREEN BAY	WI
—	920-273	4XXX5XXX9XXX · 2 holders which blocks →	PAETEC ITEL, LLC	829J	FONDDU LAC	WI
—	920-275	not yet reported which blocks →	SPOK, INC.	6630	APPLETON	WI
—	920-278	0XXX1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	DE PERE	WI
—	920-279	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	OSHKOSH	WI
—	920-281	not yet reported which blocks →	TDS METROCOM, LLC	520K	APPLETON	WI
—	920-285	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	WATERTOWN	WI
—	920-286	4XXX6XXX7XXX9XXX · 4 holders which blocks →	UNITED STATES CELLULAR - WI	6274	KIEL	WI
—	920-287	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	SHEBOYGAN	WI
—	920-290	1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BERLIN	WI
—	920-291	1XXX2XXX3XXX4XXX9XXX · 4 holders which blocks →	UNITED STATES CELLULAR - WI	6274	PRINCETON	WI
—	920-292	not yet reported which blocks →	TDS METROCOM, LLC	520K	OSHKOSH	WI
—	920-293	1XXX2XXX3XXX6XXX7XXX · 5 holders which blocks →	BRIGHTSPEED OF WESTERN WISCONSIN, LLC	0922	NESHKORO	WI
—	920-294	1XXX9XXX · 2 holders which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	GREEN LAKE	WI
—	920-295	none assigned yet which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	PRINCETON	WI
—	920-296	none assigned yet which blocks →	UNITED STATES CELLULAR - WI	6274	BEAVER DAM	WI
—	920-297	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	LAKE MILLS	WI
—	920-298	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	NEW CELL DBA CELLCOM	6692	TWO RIVERS	WI
—	920-299	4XXX5XXX6XXX7XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GREEN LAKE	WI
—	920-302	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	WAUPUN	WI
—	920-303	7XXX which blocks →	WISCONSIN BELL INC	9327	OSHKOSH	WI
—	920-304	3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	UNITED STATES CELLULAR - WI	6274	KEWAUNEE	WI
—	920-305	0–9 XXXall 10 · 6 holders which blocks →	ONVOY, LLC - WI	225C	GREEN BAY	WI
—	920-306	1XXX2XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	BEAVER DAM	WI
—	920-309	4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	DE PERE	WI
—	920-311	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	920-312	6XXX7XXX8XXX9XXX · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	OSHKOSH	WI
—	920-317	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	BEAVER DAM	WI
—	920-318	none assigned yet which blocks →	T-MOBILE USA, INC.	6529	BEAVER DAM	WI
—	920-319	2XXX3XXX4XXX5XXX7XXX8XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BEAVER DAM	WI
—	920-320	0–9 XXXall 10 · 4 holders which blocks →	WISCONSIN BELL INC	9327	MANITOWOC	WI
—	920-321	4XXX6XXX8XXX which blocks →	PAETEC ITEL, LLC	829J	GREEN BAY	WI
—	920-322	2XXX4XXX5XXX7XXX · 3 holders which blocks →	TDS METROCOM, LLC	520K	FONDDU LAC	WI
—	920-323	not yet reported which blocks →	NEW CELL DBA CELLCOM	6692	MANITOWOC	WI
—	920-324	not yet reported which blocks →	WISCONSIN BELL INC	9327	WAUPUN	WI
—	920-326	0XXX1XXX7XXX8XXX9XXX · 3 holders which blocks →	BRIGHTSPEED OF SOUTHERN WISCONSIN, LLC	0931	RANDOLPH	WI
—	920-328	3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	GREEN BAY	WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.