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
2016-03-01	517-604-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	MASON	MI
2016-03-01	517-604-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	MASON	MI
2016-03-01	517-955-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	DANSVILLE	MI
2016-03-01	517-955-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	DANSVILLE	MI
2016-03-01	517-995-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	JONESVILLE	MI
2016-03-01	517-995-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	JONESVILLE	MI
2016-02-29	517-343-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2016-02-29	517-343-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	ALBION	MI
2016-02-29	517-836-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	EATON RPD	MI
2016-02-29	517-836-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	EATON RPD	MI
2016-02-29	517-997-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2016-02-29	517-997-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2016-02-26	517-212-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	HILLSDALE	MI
2016-02-26	517-236-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	DIMONDALE	MI
2016-02-26	517-236-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	DIMONDALE	MI
2016-02-26	517-398-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	HILLSDALE	MI
2016-02-25	517-888-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	JACKSON	MI
2016-02-23	517-208-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	BRITTON	MI
2016-02-23	517-401-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	MORENCI	MI
2016-02-23	517-446-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ONSTED	MI
2016-02-23	517-701-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CLINTON	MI
2016-02-19	517-200-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LITCHFIELD	MI
2016-02-19	517-305-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CLARKLAKE	MI
2016-02-19	517-429-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	HUDSON	MI
2016-02-19	517-522-1XXX	1000–1999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	GRASS LAKE	MI
2016-02-19	517-885-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	LANSING	MI
2016-02-19	517-885-1XXX	1000–1999	Assigned	METROPCS, INC.	5562	LANSING	MI
2016-02-18	517-220-9XXX	9000–9999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	LANSING	MI
2016-02-12	517-225-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2016-02-12	517-225-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2016-02-03	517-220-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	LANSING	MI
2016-01-22	517-388-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2016-01-20	517-594-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	OSSEO	MI
2016-01-20	517-895-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CONCORD	MI
2016-01-20	517-932-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ALLEN	MI
2016-01-20	517-991-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	CAMDEN	MI
2016-01-08	517-900-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	BUNDY HILL	MI
2016-01-04	517-480-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	STOCKBDG	MI
2015-12-31	517-777-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2015-12-28	517-698-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	NORTHADAMS	MI
2015-12-22	517-991-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	CAMDEN	MI
2015-12-17	517-245-6XXX	6000–6999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	FOWLERVL	MI
2015-12-14	517-888-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	JACKSON	MI
2015-12-09	517-220-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MI	6120	LANSING	MI
2015-12-07	517-224-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	POTTERVL	MI
2015-12-07	517-331-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2015-12-07	517-589-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LESLIE	MI
2015-12-07	517-901-5XXX	5000–5999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	READING	MI
2015-12-07	517-984-1XXX	1000–1999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	WEBBERVL	MI
2015-12-07	517-993-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	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.