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
2016-07-19	517-236-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2016-07-19	517-236-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2016-07-19	517-236-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2016-07-19	517-236-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	DIMONDALE	MI
2016-06-09	517-890-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	HANOVER	MI
2016-05-24	517-343-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	ALBION	MI
2016-05-24	517-459-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	PARMA	MI
2016-05-19	517-296-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	MONTGOMERY	MI
2016-05-19	517-888-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2016-05-19	517-985-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	STOCKBDG	MI
2016-05-13	517-245-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	FOWLERVL	MI
2016-05-11	517-569-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	RIVES JCT	MI
2016-04-26	517-547-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	ADDISON	MI
2016-04-20	517-225-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	HOWELL	MI
2016-04-15	517-221-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	HOLT	MI
2016-04-14	517-867-5XXX	5000–5999	Assigned	CLEAR RATE COMMUNICATIONS, LLC	046L	JACKSON	MI
2016-04-14	517-867-6XXX	6000–6999	Assigned	CLEAR RATE COMMUNICATIONS, LLC	046L	JACKSON	MI
2016-04-14	517-867-7XXX	7000–7999	Assigned	CLEAR RATE COMMUNICATIONS, LLC	046L	JACKSON	MI
2016-04-11	517-225-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2016-04-11	517-225-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2016-04-11	517-225-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MI	991E	HOWELL	MI
2016-04-06	517-220-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	LANSING	MI
2016-03-30	517-777-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-777-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-777-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-777-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-777-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-906-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-906-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-30	517-906-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	HOLT	MI
2016-03-23	517-582-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2016-03-23	517-888-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	JACKSON	MI
2016-03-15	517-684-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	NAPOLEON	MI
2016-03-15	517-684-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	NAPOLEON	MI
2016-03-11	517-201-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2016-03-11	517-201-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	LESLIE	MI
2016-03-11	517-210-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	POTTERVL	MI
2016-03-11	517-210-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	POTTERVL	MI
2016-03-11	517-790-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	MOSHERVL	MI
2016-03-08	517-649-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	MULLIKEN	MI
2016-03-08	517-649-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	MULLIKEN	MI
2016-03-08	517-760-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	NASHVILLE	MI
2016-03-04	517-305-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	CLARKLAKE	MI
2016-03-04	517-305-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	CLARKLAKE	MI
2016-03-02	517-615-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	VERMONTVL	MI
2016-03-02	517-615-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	VERMONTVL	MI
2016-03-02	517-743-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	PORTLAND	MI
2016-03-02	517-743-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	PORTLAND	MI
2016-03-01	517-245-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	FOWLERVL	MI
2016-03-01	517-245-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	FOWLERVL	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.