Recent prefix assignments

1 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

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
—	920-487	1XXX4XXX8XXX · 3 holders which blocks →	WISCONSIN BELL INC	9327	ALGOMA	WI
—	920-488	0XXX1XXX5XXX6XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	THERESA	WI
—	920-490	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-491	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-492	0XXX1XXX6XXX8XXX9XXX · 2 holders which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-493	not yet reported which blocks →	NEW CELL DBA CELLCOM	6692	STURGEONBY	WI
—	920-494	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-495	not yet reported which blocks →	NEW CELL DBA CELLCOM	6692	STURGEONBY	WI
—	920-496	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-497	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-498	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-499	not yet reported which blocks →	WISCONSIN BELL INC	9327	GREEN BAY	WI
—	920-505	0XXX4XXX5XXX8XXX9XXX · 3 holders which blocks →	ONVOY, LLC - WI	225C	WEYAUWEGA	WI
—	920-509	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	OSHKOSH	WI
—	920-511	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	XXXXXXXXXX	WI
—	920-516	0–9 XXXall 10 · 8 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	OCONTO	WI
—	920-517	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	FONDDU LAC	WI
—	920-521	3XXX5XXX7XXX8XXX9XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	NEENAH	WI
—	920-525	0XXX1XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	BRIGHTSPEED OF CENTRAL WISCONSIN, LLC	1159	NICHOLS	WI
—	920-526	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	FRONTIER NORTH INC. - WI	0886	GREENBUSH	WI
—	920-527	0–9 XXXall 10 · 2 holders which blocks →	WISCONSIN BELL INC	9327	OSHKOSH	WI
—	920-528	3XXX4XXX5XXX · 2 holders which blocks →	FRONTIER NORTH INC. - WI	0886	CASCADE	WI
—	920-532	1XXX2XXX3XXX5XXX7XXX8XXX9XXX · 6 holders which blocks →	WISCONSIN BELL INC	9327	WRIGHTSTN	WI
—	920-533	0XXX1XXX2XXX6XXX7XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	CAMPBELSPT	WI
—	920-538	6XXX7XXX8XXX9XXX · 3 holders which blocks →	UNITED STATES CELLULAR - WI	6274	NEW LONDON	WI
—	920-539	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	FONDDU LAC	WI
—	920-544	0–9 XXXall 10 · 3 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	GREEN BAY	WI
—	920-553	not yet reported which blocks →	LAKEFIELD TELEPHONE COMPANY, LLC	0148	TWO RIVERS	WI
—	920-554	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	APPLETON	WI
—	920-555	not yet reported which blocks →	MULTIPLE OCN LISTING	MULT	DIR ASST	WI
—	920-556	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	GREEN BAY	WI
—	920-559	4XXX5XXX · 2 holders which blocks →	UNITED STATES CELLULAR - WI	6274	STURGEONBY	WI
—	920-563	not yet reported which blocks →	WISCONSIN BELL INC	9327	FTATKINSON	WI
—	920-564	0XXX1XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	FRONTIER NORTH INC. - WI	0886	OOSTBURG	WI
—	920-565	9XXX which blocks →	EASTCOAST TELECOM, INC.	0914	HOWARDSGRV	WI
—	920-566	1XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	BRIGHTSPEED OF NORTH CENTRAL WISCONSIN, LLC	0924	REDGRANITE	WI
—	920-567	1XXX3XXX6XXX8XXX · 3 holders which blocks →	PAETEC ITEL, LLC	829J	WATERTOWN	WI
—	920-568	not yet reported which blocks →	WISCONSIN BELL INC	9327	FTATKINSON	WI
—	920-570	4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	APPLETON	WI
—	920-571	0XXX1XXX2XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	T-MOBILE USA, INC.	6529	MANITOWOC	WI
—	920-572	4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	APPLETON	WI
—	920-574	0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	APPLETON	WI
—	920-576	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	SHEBOYGAN	WI
—	920-577	not yet reported which blocks →	AMERICAN MESSAGING SERVICES, LLC	9748	SHEBOYGAN	WI
—	920-578	0XXX1XXX5XXX8XXX · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MARKESAN	WI
—	920-579	5XXX which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	FONDDU LAC	WI
—	920-582	1XXX5XXX6XXX8XXX · 4 holders which blocks →	WISCONSIN BELL INC	9327	WINNECONNE	WI
—	920-583	0XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	FRONTIER NORTH INC. - WI	0886	OAKFIELD	WI
—	920-584	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MARKESAN	WI
—	920-585	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	APPLETON	WI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.