Recent prefix assignments

2 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 810

NEW CINGULAR WIRELESS PCS, LLC - IL 2

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
2013-10-10	810-369	0–9 XXXall 10 · 4 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	GOODRICH	MI
2013-07-12	810-212	0–9 XXXall 10 · 6 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	METAMORA	MI
2013-07-12	810-221	0–9 XXXall 10 · 5 holders which blocks →	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	FLINT	MI
2013-06-18	810-216	0–9 XXXall 10 · 4 holders which blocks →	TELNET WORLDWIDE, INC.	817J	PORT HURON	MI
2013-05-20	810-662	0–9 XXXall 10 · 6 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	PORT HURON	MI
2013-01-22	810-495	0–9 XXXwhole prefix which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	GRANDBLANC	MI
2012-12-08	810-493	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2012-10-24	810-634	0–9 XXXall 10 · 7 holders which blocks →	DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS	993L	NEWLOTHROP	MI
2012-07-13	810-228	0–9 XXXall 10 · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FLINT	MI
2012-07-13	810-259	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FLINT	MI
2012-07-13	810-285	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2012-01-30	810-447	0–9 XXXall 10 · 3 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	FLINT	MI
2011-08-30	810-292	0–9 XXXall 10 · 7 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	PORT HURON	MI
2011-05-16	810-553	0–9 XXXall 10 · 6 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2010-11-03	810-893	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FLINT	MI
2010-10-11	810-294	0–9 XXXall 10 · 7 holders which blocks →	BANDWIDTH.COM CLEC, LLC - MI	991E	PORT HURON	MI
2010-08-05	810-293	0–9 XXXall 10 · 2 holders which blocks →	METROPCS, INC.	5562	FLINT	MI
2010-03-29	810-620	0–9 XXXall 10 · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	FLINT	MI
2009-12-01	810-288	0–9 XXXall 10 · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	FLINT	MI
2009-08-03	810-214	0–9 XXXall 10 · 4 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	DAVISON	MI
2008-11-17	810-308	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	FLINT	MI
2008-10-02	810-309	0–9 XXXall 10 · 5 holders which blocks →	ONVOY, LLCV - MI	543C	FLINT	MI
2008-09-18	810-406	0–9 XXXall 10 · 5 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2008-08-28	810-399	0–9 XXXall 10 · 4 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2008-08-26	810-258	0–9 XXXall 10 · 7 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	RANKIN	MI
2008-03-03	810-336	0–9 XXXwhole prefix which blocks →	METROPCS, INC.	5562	FLINT	MI
2008-01-31	810-262	0–9 XXXall 10 · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2007-01-04	810-208	0XXX1XXX2XXX3XXX4XXX7XXX8XXX · 5 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	FENTON	MI
2006-09-20	810-771	0–9 XXXall 10 · 5 holders which blocks →	GRID 4 COMMUNICATIONS, INC. - MI	9714	GRANDBLANC	MI
2006-09-12	810-350	0–9 XXXall 10 · 7 holders which blocks →	COMCAST IP PHONE, LLC	318J	MONTROSE	MI
2006-03-20	810-354	0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	FENTON	MI
2006-02-21	810-270	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks →	CHARTER IP ENABLED SERVICES, LLC	792K	NORTH BRCH	MI
2005-12-27	810-360	0–9 XXXall 10 · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	BRIGHTON	MI
2005-11-23	810-207	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	HARTLAND	MI
2005-11-21	810-412	0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks →	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	DAVISON	MI
2005-01-26	810-344	0–9 XXXall 10 · 8 holders which blocks →	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	GRANDBLANC	MI
2004-12-06	810-988	not yet reported which blocks →	TELNET WORLDWIDE, INC.	817J	MONTROSE	MI
2004-04-01	810-247	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MONTROSE	MI
2004-03-08	810-201	0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PT SANILAC	MI
2003-02-21	810-991	0–9 XXXall 10 · 8 holders which blocks →	123.NET, LLC	2550	HARTLAND	MI
2002-10-03	810-656	none assigned yet which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	LAPEER	MI
2002-09-17	810-569	not yet reported which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FLINT	MI
2002-09-17	810-751	1XXX2XXX3XXX8XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	CAPAC	MI
2002-09-17	810-790	7XXX8XXX9XXX · 3 holders which blocks →	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	IMLAY CITY	MI
2002-08-28	810-986	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	BRIGHTON	MI
2002-08-06	810-282	1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks →	MICHIGAN BELL TEL CO	9323	FLINT	MI
2002-07-11	810-580	0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 4 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ALGONAC	MI
2002-06-26	810-627	0XXX2XXX3XXX4XXX5XXX6XXX7XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	IMLAY CITY	MI
2002-06-26	810-772	0XXX2XXX3XXX4XXX5XXX7XXX · 6 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	BRIGHTON	MI
2002-06-26	810-834	0XXX3XXX4XXX5XXX6XXX7XXX8XXX · 3 holders which blocks →	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	LAPEER	MI

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.