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
2017-03-06	517-522-9XXX	9000–9999	Assigned	123.NET, LLC	2550	GRASS LAKE	MI
2017-03-03	517-377-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2017-03-03	517-481-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2017-03-03	517-897-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2017-03-01	517-867-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2017-01-31	517-325-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2017-01-31	517-726-8XXX	8000–8999	Assigned	123.NET, LLC	2550	VERMONTVL	MI
2017-01-30	517-910-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ONONDAGA	MI
2017-01-23	517-888-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2017-01-18	517-377-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	LANSING	MI
2017-01-18	517-377-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	LANSING	MI
2017-01-11	517-234-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2017-01-11	517-234-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2017-01-11	517-234-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2017-01-09	517-626-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	GRANDLEDGE	MI
2016-12-07	517-342-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2016-11-09	517-858-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	BRONSON	MI
2016-11-08	517-234-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOWELL	MI
2016-11-08	517-234-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOWELL	MI
2016-11-04	517-225-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOWELL	MI
2016-10-31	517-317-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COLDWATER	MI
2016-10-18	517-318-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	LANSING	MI
2016-10-14	517-442-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ADRIAN	MI
2016-10-13	517-236-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7157	DIMONDALE	MI
2016-10-12	517-319-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	LANSING	MI
2016-09-28	517-930-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2016-09-14	517-604-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MASON	MI
2016-09-13	517-702-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	LANSING	MI
2016-09-13	517-721-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	LANSING	MI
2016-08-26	517-897-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2016-08-23	517-220-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2016-08-23	517-220-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2016-08-23	517-220-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2016-08-23	517-220-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2016-08-22	517-664-0XXX	0000–0999	Assigned	AT&T ENTERPRISES, LLC	516C	LANSING	MI
2016-08-10	517-225-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2016-08-05	517-867-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2016-08-04	517-992-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	WILLIAMSTN	MI
2016-08-01	517-220-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2016-07-19	517-221-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-221-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-07-19	517-236-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2016-07-19	517-236-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	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.