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
2023-07-26	517-328-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI	6003	LANSING	MI
2023-07-20	517-557-9XXX	9000–9999	Assigned	PEERLESS NETWORK OF MICHIGAN, LLC - MI	933G	BRITTON	MI
2023-07-19	517-326-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-07-19	517-326-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - IL	6534	LANSING	MI
2023-07-14	517-537-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-540-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-553-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-553-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-553-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-553-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	HOWELL	MI
2023-07-14	517-758-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2023-07-14	517-758-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2023-07-14	517-758-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2023-07-14	517-758-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	HOLT	MI
2023-07-14	517-786-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2023-07-14	517-786-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2023-07-14	517-786-6XXX	6000–6999	Assigned	ONVOY, LLCV - MI	543C	CHARLOTTE	MI
2023-07-05	517-352-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	BATH	MI
2023-07-05	517-354-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	LAINGSBURG	MI
2023-07-05	517-359-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	STOCKBDG	MI
2023-07-05	517-365-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	WEBBERVL	MI
2023-07-05	517-370-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	MONTGOMERY	MI
2023-06-30	517-297-1XXX	1000–1999	Assigned	ONVOY, LLCV - MI	543C	HILLSDALE	MI
2023-06-30	517-299-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-30	517-299-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-30	517-910-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	ONONDAGA	MI
2023-06-30	517-929-0XXX	0000–0999	Assigned	ONVOY, LLCV - MI	543C	HOMER	MI
2023-06-29	517-770-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	LANSING	MI
2023-06-29	517-770-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	LANSING	MI
2023-06-29	517-892-0XXX	0000–0999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-1XXX	1000–1999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-29	517-892-9XXX	9000–9999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MI	770E	LANSING	MI
2023-06-23	517-291-8XXX	8000–8999	Assigned	ONVOY, LLCV - MI	543C	ADRIAN	MI
2023-06-12	517-428-5XXX	5000–5999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	FOWLERVL	MI
2023-06-12	517-909-2XXX	2000–2999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	DANSVILLE	MI
2023-06-02	517-261-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	GRANDLEDGE	MI
2023-06-02	517-271-9XXX	9000–9999	Assigned	ONVOY, LLCV - MI	543C	NASHVILLE	MI
2023-06-02	517-289-2XXX	2000–2999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-02	517-289-3XXX	3000–3999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-02	517-289-4XXX	4000–4999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-02	517-289-5XXX	5000–5999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-02	517-289-7XXX	7000–7999	Assigned	ONVOY, LLCV - MI	543C	LANSING	MI
2023-06-02	517-299-1XXX	1000–1999	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.