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 414

ONVOY, LLC - WI 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
2008-12-03	414-514	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-12-03	414-554	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-11-26	414-670	0–9 XXXwhole prefix which blocks →	LEVEL 3 TELECOM OF WISCONSIN, LP - WI	7322	MILWAUKZN1	WI
2008-09-15	414-335	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	MILWAUKZN1	WI
2008-06-27	414-544	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-06-27	414-552	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-06-27	414-553	0–9 XXXall 10 · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-06-23	414-255	0–9 XXXall 10 · 4 holders which blocks →	PAETEC ITEL, LLC	829J	MILWAUKZN1	WI
2008-05-15	414-395	0–9 XXXall 10 · 5 holders which blocks →	BANDWIDTH.COM CLEC, LLC - WI	007F	MILWAUKZN1	WI
2008-05-06	414-245	0–9 XXXwhole prefix which blocks →	WISCONSIN BELL INC	9327	MILWAUKZN1	WI
2008-05-06	414-551	0–9 XXXwhole prefix which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2008-01-14	414-502	0–9 XXXall 10 · 4 holders which blocks →	ONVOY, LLC - WI	225C	MILWAUKZN1	WI
2006-02-17	414-306	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN3	WI
2006-02-14	414-292	0–9 XXXall 10 · 4 holders which blocks →	TDS METROCOM, LLC	520K	MILWAUKZN1	WI
2006-01-13	414-215	0–9 XXXall 10 · 5 holders which blocks →	AT&T ENTERPRISES, LLC	516C	MILWAUKZN5	WI
2005-12-08	414-208	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	MILWAUKZN1	WI
2005-12-08	414-301	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN5	WI
2005-11-09	414-312	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN1	WI
2005-05-31	414-269	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN1	WI
2004-03-01	414-446	0–9 XXXall 10 · 5 holders which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN4	WI
2003-10-28	414-455	0–9 XXXall 10 · 3 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MILWAUKZN1	WI
2003-02-24	414-334	2XXX3XXX4XXX5XXX6XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN5	WI
2003-01-22	414-243	5XXX6XXX7XXX8XXX which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN1	WI
2002-12-20	414-534	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN3	WI
2002-12-16	414-375	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN4	WI
2002-12-16	414-376	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN5	WI
2002-12-16	414-377	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN3	WI
2002-11-18	414-367	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF WISCONSIN, LP - WI	7322	MILWAUKZN3	WI
2002-11-18	414-368	0XXX1XXX2XXX3XXX4XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 TELECOM OF WISCONSIN, LP - WI	7322	MILWAUKZN4	WI
2002-11-18	414-369	0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 TELECOM OF WISCONSIN, LP - WI	7322	MILWAUKZN5	WI
2002-07-25	414-661	not yet reported which blocks →	WISCONSIN BELL INC	9327	MILWAUKZN5	WI
2002-06-20	414-248	4XXX5XXX7XXX8XXX · 2 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2002-05-01	414-574	0XXX1XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC WI	7216	MILWAUKZN5	WI
2002-04-02	414-234	2XXX3XXX4XXX5XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN5	WI
2002-04-02	414-235	2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN3	WI
2002-04-02	414-236	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 5 holders which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN4	WI
2002-03-01	414-646	not yet reported which blocks →	WISCONSIN BELL INC	9327	MILWAUKZN1	WI
2002-01-29	414-526	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2002-01-16	414-736	7XXX which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN1	WI
2002-01-16	414-737	7XXX which blocks →	T-MOBILE USA, INC.	6529	MILWAUKZN5	WI
2001-09-28	414-326	0XXX1XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - WI	5489	MILWAUKZN1	WI
2001-08-07	414-687	not yet reported which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MILWAUKZN1	WI
2001-05-03	414-985	not yet reported which blocks →	WISCONSIN BELL INC	9327	MILWAUKZN1	WI
2001-02-02	414-763	0XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX which blocks →	TWC IP ENABLED SERVICES, LLC	793K	MILWAUKZN1	WI
—	414-201	not yet reported which blocks →	SPOK, INC.	6630	MILWAUKZN1	WI
—	414-202	0XXX2XXX which blocks →	METROPCS, INC.	5562	MILWAUKZN1	WI
—	414-203	not yet reported which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MILWAUKZN1	WI
—	414-205	not yet reported which blocks →	SPOK, INC.	6630	MILWAUKZN1	WI
—	414-207	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WI	6508	MILWAUKZN1	WI
—	414-209	2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	MILWAUKZN3	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.