Recent thousands-block assignments

10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.

Most active assignees, last 30 days — NPA 517

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 5

MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 1

LEVEL 3 COMMUNICATIONS, LLC - MI 1

INTRADO COMMUNICATIONS, LLC 1

BOOST SUBSCRIBERCO L.L.C. 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 thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2013-07-16	517-816-6XXX	6000–6999	Assigned	TELNET WORLDWIDE, INC.	817J	LANSING	MI
2013-07-10	517-288-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-288-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-288-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-288-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-288-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-288-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-566-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-566-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-566-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-566-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-07-10	517-889-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2013-07-01	517-258-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2013-06-20	517-252-3XXX	3000–3999	Assigned	DEERFIELD FARMERS' TELEPHONE COMPANY - MI	558A	ADDISON	MI
2013-06-13	517-513-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2013-04-22	517-253-2XXX	2000–2999	Assigned	MICHIGAN BELL TEL CO	9323	LANSING	MI
2013-04-22	517-253-3XXX	3000–3999	Assigned	MICHIGAN BELL TEL CO	9323	LANSING	MI
2013-04-22	517-253-4XXX	4000–4999	Assigned	MICHIGAN BELL TEL CO	9323	LANSING	MI
2013-04-22	517-253-5XXX	5000–5999	Assigned	MICHIGAN BELL TEL CO	9323	LANSING	MI
2013-04-22	517-253-6XXX	6000–6999	Assigned	MICHIGAN BELL TEL CO	9323	LANSING	MI
2013-04-19	517-715-1XXX	1000–1999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	FOWLERVL	MI
2013-04-04	517-480-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	STOCKBDG	MI
2013-03-26	517-459-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	PARMA	MI
2013-03-26	517-480-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	STOCKBDG	MI
2013-03-26	517-521-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	WEBBERVL	MI
2013-03-26	517-569-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	RIVES JCT	MI
2013-03-26	517-901-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	READING	MI
2013-03-26	517-910-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	ONONDAGA	MI
2013-03-26	517-992-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	WILLIAMSTN	MI
2013-03-20	517-252-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	ADDISON	MI
2013-03-20	517-325-0XXX	0000–0999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	LANSING	MI
2013-03-20	517-418-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	HOMER	MI
2013-03-20	517-565-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	FITCHBURG	MI
2013-03-20	517-596-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	MUNITH	MI
2013-03-20	517-624-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	DE WITT	MI
2013-03-20	517-903-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	BATH	MI
2013-03-20	517-919-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	LAINGSBURG	MI
2013-03-20	517-926-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	GRASS LAKE	MI
2013-03-11	517-295-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2013-03-06	517-852-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	NASHVILLE	MI
2013-02-22	517-715-2XXX	2000–2999	Assigned	CLEAR RATE COMMUNICATIONS, LLC	046L	FOWLERVL	MI
2013-02-22	517-994-0XXX	0000–0999	Assigned	CLEAR RATE COMMUNICATIONS, LLC	046L	PORTLAND	MI
2013-02-13	517-258-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2013-02-12	517-288-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-288-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-288-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-597-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-597-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-597-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI
2013-02-12	517-597-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	SUNFIELD	MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.