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
2017-12-18	920-247	0–9 XXXall 10 · 5 holders which blocks →	VONAGE AMERICA LLC	197D	GREEN BAY	WI
2017-12-01	920-404	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	APPLETON	WI
2017-10-03	920-409	2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	CENTURYLINK COMMUNICATIONS, LLC	508J	JOHNSONCRK	WI
2017-07-26	920-396	0–9 XXXall 10 · 4 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GREEN BAY	WI
2017-06-26	920-381	0–9 XXXall 10 · 2 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	APPLETON	WI
2017-03-13	920-308	0–9 XXXall 10 · 8 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC WI	7216	FTATKINSON	WI
2016-11-07	920-454	0–9 XXXall 10 · 3 holders which blocks →	TDS METROCOM, LLC	520K	APPLETON	WI
2016-10-17	920-283	0–9 XXXall 10 · 2 holders which blocks →	PEERLESS NETWORK OF WISCONSIN, LLC - WI	227F	GREEN BAY	WI
2016-06-27	920-325	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	WAUPUN	WI
2016-04-27	920-301	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WI	225C	GREEN BAY	WI
2016-03-15	920-280	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - WI	225C	LTL CHUTE	WI
2016-01-05	920-880	0–9 XXXall 10 · 6 holders which blocks →	PEERLESS NETWORK OF WISCONSIN, LLC - WI	227F	ALGOMA	WI
2015-12-01	920-666	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLC - WI	225C	APPLETON	WI
2015-11-17	920-600	0–9 XXXall 10 · 3 holders which blocks →	ONVOY, LLC - WI	225C	GREEN BAY	WI
2015-06-05	920-315	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	HUSTISFORD	WI
2015-06-05	920-515	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	APPLETON	WI
2015-04-30	920-310	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	KEWAUNEE	WI
2015-03-18	920-949	0–9 XXXall 10 · 7 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	KAUKAUNA	WI
2015-03-06	920-939	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	APPLETON	WI
2015-01-27	920-777	0–9 XXXwhole prefix which blocks →	ONVOY, LLC - WI	225C	GREEN BAY	WI
2014-12-28	920-861	1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 7 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	WINNECONNE	WI
2014-09-03	920-702	not yet reported which blocks →	TDS METROCOM, LLC	520K	APPLETON	WI
2014-09-03	920-707	not yet reported which blocks →	TDS METROCOM, LLC	520K	APPLETON	WI
2014-05-16	920-815	0–9 XXXall 10 · 4 holders which blocks →	T-MOBILE USA, INC.	6529	APPLETON	WI
2014-05-08	920-770	0–9 XXXall 10 · 4 holders which blocks →	PEERLESS NETWORK OF WISCONSIN, LLC - WI	227F	GREEN BAY	WI
2014-02-18	920-717	0–9 XXXall 10 · 5 holders which blocks →	COMCAST IP PHONE, LLC	318J	MANITOWOC	WI
2013-07-30	920-221	0–9 XXXall 10 · 5 holders which blocks →	WISCONSIN BELL INC	9327	APPLETON	WI
2013-05-24	920-300	0XXX1XXX3XXX7XXX8XXX · 4 holders which blocks →	EASTCOAST TELECOM, INC.	0914	CLEVELAND	WI
2013-03-08	920-489	0–9 XXXall 10 · 5 holders which blocks →	NUSO, LLC	551G	GREEN BAY	WI
2013-02-13	920-399	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	PLTC, LLC - WI	375F	OCONTO FLS	WI
2012-12-26	920-461	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	GREEN BAY	WI
2012-11-16	920-234	0–9 XXXall 10 · 7 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	SHEBOGNFLS	WI
2011-11-09	920-709	0–9 XXXall 10 · 7 holders which blocks →	PAETEC ITEL, LLC	829J	JUNEAU	WI
2011-02-21	920-352	0–9 XXXall 10 · 6 holders which blocks →	AT&T ENTERPRISES, LLC	516C	VAN DYNE	WI
2010-11-30	920-393	0–9 XXXall 10 · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	GREEN BAY	WI
2010-11-04	920-415	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	LTL CHUTE	WI
2010-08-06	920-903	0–9 XXXall 10 · 6 holders which blocks →	T-MOBILE USA, INC.	6529	APPLETON	WI
2010-02-25	920-557	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC WI	7216	BEAVER DAM	WI
2010-01-14	920-631	0–9 XXXall 10 · 7 holders which blocks →	AT&T ENTERPRISES, LLC	516C	BEAVER DAM	WI
2010-01-11	920-877	0XXX1XXX2XXX4XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	AT&T ENTERPRISES, LLC	516C	HORTONVL	WI
2009-10-23	920-692	0XXX1XXX2XXX5XXX9XXX · 3 holders which blocks →	MICHIGAN WIRELESS, LLC DBA BUG TUSSEL WIRELESS	698E	MANAWA	WI
2009-10-12	920-343	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	WISCONSIN BELL INC	9327	DE PERE	WI
2009-05-21	920-633	0–9 XXXall 10 · 7 holders which blocks →	MICHIGAN WIRELESS, LLC DBA BUG TUSSEL WIRELESS	698E	SISTER BAY	WI
2009-05-12	920-771	0XXX1XXX2XXX3XXX7XXX · 5 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MILLCENTER	WI
2009-05-11	920-503	0XXX1XXX2XXX3XXX4XXX6XXX8XXX · 6 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	PULASKI	WI
2009-05-11	920-649	0XXX2XXX6XXX9XXX · 4 holders which blocks →	TWC IP ENABLED SERVICES, LLC	793K	ONEIDA	WI
2008-10-23	920-785	0–9 XXXall 10 · 7 holders which blocks →	ONVOY, LLC - WI	225C	GREEN BAY	WI
2008-10-03	920-659	0–9 XXXall 10 · 4 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	APPLETON	WI
2008-08-05	920-931	0–9 XXXall 10 · 6 holders which blocks →	MICHIGAN WIRELESS, LLC DBA BUG TUSSEL WIRELESS	698E	APPLETON	WI
2008-07-30	920-940	0–9 XXXall 10 · 6 holders which blocks →	MICHIGAN WIRELESS, LLC DBA BUG TUSSEL WIRELESS	698E	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.