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
2020-08-13	517-686-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2020-08-13	517-686-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2020-08-11	517-208-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	BRITTON	MI
2020-08-11	517-445-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	CLAYTON	MI
2020-08-11	517-458-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	MORENCI	MI
2020-08-11	517-458-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	MORENCI	MI
2020-08-11	517-459-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	PARMA	MI
2020-08-11	517-459-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	PARMA	MI
2020-08-10	517-480-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	STOCKBDG	MI
2020-08-10	517-480-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	STOCKBDG	MI
2020-08-10	517-929-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	HOMER	MI
2020-08-10	517-929-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	HOMER	MI
2020-07-22	517-619-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	LANSING	MI
2020-07-22	517-928-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	MASON	MI
2020-07-09	517-662-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ADRIAN	MI
2020-07-09	517-877-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LITCHFIELD	MI
2020-06-29	517-781-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7157	COLDWATER	MI
2020-06-25	517-216-2XXX	2000–2999	Assigned	CSC WIRELESS, LLC	425J	LANSING	MI
2020-06-25	517-400-5XXX	5000–5999	Assigned	ONVOY SPECTRUM, LLC	624H	LANSING	MI
2020-06-25	517-400-6XXX	6000–6999	Assigned	ONVOY SPECTRUM, LLC	624H	LANSING	MI
2020-06-25	517-400-7XXX	7000–7999	Assigned	ONVOY SPECTRUM, LLC	624H	LANSING	MI
2020-06-25	517-400-8XXX	8000–8999	Assigned	ONVOY SPECTRUM, LLC	624H	LANSING	MI
2020-06-24	517-247-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2020-06-24	517-247-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2020-06-02	517-836-4XXX	4000–4999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7157	EATON RPD	MI
2020-05-28	517-201-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI	7157	LESLIE	MI
2020-05-26	517-675-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	SHAFTSBURG	MI
2020-05-15	517-300-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-05-15	517-300-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-05-15	517-300-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-05-15	517-401-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	MORENCI	MI
2020-05-11	517-445-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	CLAYTON	MI
2020-05-11	517-468-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	BELL OAK	MI
2020-05-11	517-697-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	PERRY	MI
2020-05-01	517-246-2XXX	2000–2999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	LANSING	MI
2020-04-22	517-928-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	MASON	MI
2020-04-21	517-774-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	COLDWTR LK	MI
2020-04-09	517-300-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-04-09	517-300-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-04-09	517-300-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-04-09	517-300-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2020-04-09	517-500-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	SUNFIELD	MI
2020-04-09	517-500-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	SUNFIELD	MI
2020-04-09	517-500-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	SUNFIELD	MI
2020-04-09	517-500-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	SUNFIELD	MI
2020-04-09	517-793-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	LITCHFIELD	MI
2020-04-09	517-793-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	LITCHFIELD	MI
2020-04-08	517-429-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	HUDSON	MI
2020-04-08	517-429-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	HUDSON	MI
2020-04-08	517-429-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	HUDSON	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.