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
2018-09-13	517-446-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	ONSTED	MI
2018-09-12	517-296-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	MONTGOMERY	MI
2018-09-12	517-594-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	OSSEO	MI
2018-09-12	517-695-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	RANSOM	MI
2018-09-12	517-696-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	PRATTVILLE	MI
2018-09-12	517-698-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	NORTHADAMS	MI
2018-09-12	517-890-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	HANOVER	MI
2018-09-12	517-891-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	FRONTIER	MI
2018-09-12	517-895-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	CONCORD	MI
2018-09-12	517-900-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	BUNDY HILL	MI
2018-09-12	517-932-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	ALLEN	MI
2018-09-12	517-938-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	BROOKLYN	MI
2018-09-12	517-946-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	CAMBRIA	MI
2018-09-12	517-991-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	CAMDEN	MI
2018-08-30	517-273-8XXX	8000–8999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	HOWELL	MI
2018-08-30	517-401-9XXX	9000–9999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	MORENCI	MI
2018-08-27	517-836-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	EATON RPD	MI
2018-08-23	517-550-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	DIMONDALE	MI
2018-08-21	517-208-2XXX	2000–2999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	BRITTON	MI
2018-08-20	517-201-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2018-08-17	517-273-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2018-07-24	517-583-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	TEKONSHA	MI
2018-07-10	517-619-2XXX	2000–2999	Assigned	METROPCS, INC.	5562	LANSING	MI
2018-07-10	517-619-4XXX	4000–4999	Assigned	METROPCS, INC.	5562	LANSING	MI
2018-07-10	517-619-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	LANSING	MI
2018-06-20	517-257-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2018-05-31	517-273-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2018-05-16	517-647-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	PORTLAND	MI
2018-05-09	517-730-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2018-04-24	517-921-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	ADDISON	MI
2018-04-17	517-624-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	DE WITT	MI
2018-03-12	517-730-0XXX	0000–0999	Assigned	VONAGE AMERICA LLC	197D	LANSING	MI
2018-02-05	517-619-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2018-01-29	517-257-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2018-01-17	517-257-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	JACKSON	MI
2018-01-03	517-566-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	SUNFIELD	MI
2017-12-07	517-619-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	LANSING	MI
2017-12-01	517-997-2XXX	2000–2999	Assigned	OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC	2964	CHARLOTTE	MI
2017-11-27	517-208-1XXX	1000–1999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	BRITTON	MI
2017-11-22	517-312-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	ADRIAN	MI
2017-11-22	517-619-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2017-11-22	517-619-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2017-11-22	517-666-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	GRANDLEDGE	MI
2017-11-21	517-926-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	GRASS LAKE	MI
2017-11-20	517-236-5XXX	5000–5999	Assigned	123.NET, LLC	2550	DIMONDALE	MI
2017-11-16	517-901-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	READING	MI
2017-11-13	517-867-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2017-11-13	517-867-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2017-11-13	517-867-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2017-10-26	517-446-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	ONSTED	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.