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
2013-02-11	517-912-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2013-02-11	517-912-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2013-02-11	517-912-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2013-02-08	517-816-4XXX	4000–4999	Assigned	ACD TELECOM, INC. - MI	3535	LANSING	MI
2013-01-10	517-301-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	TECUMSEH	MI
2013-01-04	517-554-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ALBION	MI
2013-01-03	517-235-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	DIMONDALE	MI
2013-01-03	517-305-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	CLARKLAKE	MI
2013-01-03	517-343-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2013-01-03	517-645-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	POTTERVL	MI
2013-01-03	517-684-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	NAPOLEON	MI
2013-01-03	517-715-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	FOWLERVL	MI
2013-01-03	517-726-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	VERMONTVL	MI
2013-01-03	517-742-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2013-01-03	517-760-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	NASHVILLE	MI
2013-01-03	517-797-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HILLSDALE	MI
2013-01-03	517-826-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	JONESVILLE	MI
2013-01-03	517-836-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	EATON RPD	MI
2013-01-03	517-878-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2013-01-03	517-948-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	MULLIKEN	MI
2013-01-03	517-955-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	DANSVILLE	MI
2013-01-03	517-969-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	MASON	MI
2013-01-03	517-994-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	PORTLAND	MI
2013-01-03	517-997-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2012-12-07	517-684-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	NAPOLEON	MI
2012-12-07	517-743-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	PORTLAND	MI
2012-12-07	517-760-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	NASHVILLE	MI
2012-12-07	517-763-2XXX	2000–2999	Assigned	AT&T ENTERPRISES, LLC	516C	LANSING	MI
2012-12-07	517-948-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	MULLIKEN	MI
2012-12-06	517-883-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	MASON	MI
2012-12-03	517-878-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2012-12-03	517-995-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	JONESVILLE	MI
2012-11-19	517-258-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2012-11-13	517-258-5XXX	5000–5999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	HOWELL	MI
2012-11-13	517-258-6XXX	6000–6999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7279	HOWELL	MI
2012-10-19	517-595-4XXX	4000–4999	Assigned	DEERFIELD FARMERS' TELEPHONE COMPANY - MI	558A	WALDRON	MI
2012-10-17	517-325-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	LANSING	MI
2012-09-25	517-793-1XXX	1000–1999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	LITCHFIELD	MI
2012-09-18	517-305-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	CLARKLAKE	MI
2012-09-14	517-258-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2012-08-24	517-258-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2012-07-30	517-395-2XXX	2000–2999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7157	JACKSON	MI
2012-07-18	517-554-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	ALBION	MI
2012-07-09	517-212-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	HILLSDALE	MI
2012-07-09	517-366-3XXX	3000–3999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	ADRIAN	MI
2012-06-14	517-409-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	BLISSFIELD	MI
2012-06-14	517-624-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	DE WITT	MI
2012-05-31	517-446-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	ONSTED	MI
2012-05-30	517-682-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	BLISSFIELD	MI
2012-05-23	517-483-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	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.