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
2024-02-21	517-362-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	MASON	MI
2024-02-21	517-362-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	MASON	MI
2024-02-16	517-314-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2024-02-16	517-344-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2024-02-15	517-514-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CLINTON	MI
2024-02-15	517-514-1XXX	1000–1999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CLINTON	MI
2024-02-15	517-630-4XXX	4000–4999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ALBION	MI
2024-02-15	517-630-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ALBION	MI
2024-02-15	517-630-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ALBION	MI
2024-01-17	517-380-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	HOWELL	MI
2024-01-12	517-440-0XXX	0000–0999	Assigned	TERRA NOVA TELECOM INC.	145J	LANSING	MI
2024-01-09	517-289-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2024-01-09	517-326-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-12-08	517-893-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-11-17	517-314-3XXX	3000–3999	Assigned	NUSO, LLC	732J	JACKSON	MI
2023-11-17	517-314-5XXX	5000–5999	Assigned	NUSO, LLC	732J	JACKSON	MI
2023-11-16	517-218-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	PORTLAND	MI
2023-11-13	517-893-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-11-09	517-594-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	OSSEO	MI
2023-10-31	517-551-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FOWLERVL	MI
2023-10-23	517-293-0XXX	0000–0999	Assigned	COMMIO, LLC	939H	LESLIE	MI
2023-10-23	517-293-5XXX	5000–5999	Assigned	COMMIO, LLC	939H	LESLIE	MI
2023-10-23	517-293-6XXX	6000–6999	Assigned	COMMIO, LLC	939H	LESLIE	MI
2023-10-23	517-293-7XXX	7000–7999	Assigned	COMMIO, LLC	939H	LESLIE	MI
2023-10-23	517-293-8XXX	8000–8999	Assigned	COMMIO, LLC	939H	LESLIE	MI
2023-10-23	517-909-8XXX	8000–8999	Assigned	COMMIO, LLC	939H	DANSVILLE	MI
2023-10-23	517-909-9XXX	9000–9999	Assigned	COMMIO, LLC	939H	DANSVILLE	MI
2023-10-23	517-955-0XXX	0000–0999	Assigned	COMMIO, LLC	939H	DANSVILLE	MI
2023-10-23	517-955-4XXX	4000–4999	Assigned	COMMIO, LLC	939H	DANSVILLE	MI
2023-10-23	517-955-8XXX	8000–8999	Assigned	COMMIO, LLC	939H	DANSVILLE	MI
2023-10-20	517-494-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ALBION	MI
2023-10-16	517-268-1XXX	1000–1999	Assigned	TERRA NOVA TELECOM INC.	145J	HOLT	MI
2023-10-13	517-276-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HUDSON	MI
2023-10-03	517-770-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-09-28	517-855-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2023-09-28	517-855-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2023-09-28	517-855-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2023-09-19	517-314-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2023-09-19	517-314-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2023-08-30	517-237-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-08-29	517-310-7XXX	7000–7999	Assigned	AT&T ENTERPRISES, LLC	516C	MULLIKEN	MI
2023-08-15	517-551-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	FOWLERVL	MI
2023-08-04	517-261-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	GRANDLEDGE	MI
2023-08-04	517-314-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	JACKSON	MI
2023-08-04	517-682-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	BLISSFIELD	MI
2023-08-04	517-793-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	LITCHFIELD	MI
2023-08-04	517-929-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HOMER	MI
2023-07-28	517-365-1XXX	1000–1999	Assigned	COMCAST IP PHONE, LLC	318J	WEBBERVL	MI
2023-07-27	517-291-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	ADRIAN	MI
2023-07-26	517-328-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	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.