Recent thousands-block assignments

10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2023-06-02	517-314-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	JACKSON	MI
2023-06-02	517-399-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	EATON RPD	MI
2023-06-02	517-551-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	FOWLERVL	MI
2023-06-02	517-554-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2023-06-02	517-837-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	TECUMSEH	MI
2023-06-02	517-924-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	COLDWATER	MI
2023-05-25	517-246-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-05-25	517-908-1XXX	1000–1999	Assigned	TERRA NOVA TELECOM INC.	145J	LANSING	MI
2023-05-24	517-765-0XXX	0000–0999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	BURLINGTON	MI
2023-05-22	517-443-8XXX	8000–8999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	OGDEN CTR	MI
2023-05-08	517-888-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2023-04-04	517-261-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	GRANDLEDGE	MI
2023-04-04	517-268-6XXX	6000–6999	Assigned	TERRA NOVA TELECOM INC.	145J	HOLT	MI
2023-04-04	517-275-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-04-04	517-275-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-04-04	517-275-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-04-04	517-399-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	EATON RPD	MI
2023-03-24	517-736-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	COLDWATER	MI
2023-03-23	517-521-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	WEBBERVL	MI
2023-03-23	517-551-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FOWLERVL	MI
2023-03-23	517-551-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	FOWLERVL	MI
2023-03-23	517-628-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	ONONDAGA	MI
2023-03-16	517-551-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	FOWLERVL	MI
2023-03-10	517-350-8XXX	8000–8999	Assigned	HD CARRIER LLC	321J	LANSING	MI
2023-03-10	517-350-9XXX	9000–9999	Assigned	HD CARRIER LLC	321J	LANSING	MI
2023-03-09	517-837-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	TECUMSEH	MI
2023-03-08	517-216-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-03-08	517-746-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	COLDWATER	MI
2023-03-03	517-314-2XXX	2000–2999	Assigned	NUSO, LLC	732J	JACKSON	MI
2023-02-13	517-239-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	DE WITT	MI
2023-01-30	517-553-7XXX	7000–7999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	HOWELL	MI
2023-01-26	517-275-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-01-25	517-299-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	LANSING	MI
2023-01-10	517-344-2XXX	2000–2999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2023-01-10	517-867-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2022-12-30	517-344-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	JACKSON	MI
2022-12-06	517-302-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FOWLERVL	MI
2022-11-29	517-732-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	PORTLAND	MI
2022-11-23	517-271-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	NASHVILLE	MI
2022-11-17	517-391-3XXX	3000–3999	Assigned	TERRA NOVA TELECOM INC.	145J	LANSING	MI
2022-11-14	517-237-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2022-11-14	517-237-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2022-11-14	517-237-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2022-11-10	517-276-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	HUDSON	MI
2022-11-10	517-293-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2022-11-04	517-378-4XXX	4000–4999	Assigned	COMMIO, LLC	939H	POTTERVL	MI
2022-11-04	517-550-1XXX	1000–1999	Assigned	COMMIO, LLC	939H	DIMONDALE	MI
2022-11-04	517-732-9XXX	9000–9999	Assigned	COMMIO, LLC	939H	PORTLAND	MI
2022-11-02	517-837-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	TECUMSEH	MI
2022-10-28	517-297-0XXX	0000–0999	Assigned	COMMIO, LLC	939H	HILLSDALE	MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.