Recent thousands-block assignments

2 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 410

ONVOY, LLC - MD 2

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
2016-09-22	410-438-7XXX	7000–7999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	SUDLERSVL	MD
2016-09-15	410-401-6XXX	6000–6999	Assigned	IP HORIZON LLC	515J	BRYNPKLNCM	MD
2016-09-07	410-702-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	REISTERSTN	MD
2016-08-23	410-553-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GLENBURNIE	MD
2016-08-22	410-582-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-08-22	410-582-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-08-09	410-403-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	COCKEYSVL	MD
2016-08-09	410-995-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ELLICOTTCY	MD
2016-07-22	410-855-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	GLENBURNIE	MD
2016-07-18	410-684-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2016-07-18	410-694-1XXX	1000–1999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2016-07-18	410-855-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2016-07-18	410-892-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2016-07-07	410-553-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GLENBURNIE	MD
2016-06-23	410-892-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-06-23	410-892-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-06-21	410-618-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PERRYVILLE	MD
2016-06-02	410-855-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GLENBURNIE	MD
2016-05-18	410-329-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	COCKEYSVL	MD
2016-05-03	410-508-9XXX	9000–9999	Assigned	IP HORIZON LLC	515J	GLENBURNIE	MD
2016-05-03	410-696-0XXX	0000–0999	Assigned	IP HORIZON LLC	515J	ELLICOTTCY	MD
2016-04-20	410-261-4XXX	4000–4999	Assigned	ONVOY, LLC - MD	876D	BALTIMORE	MD
2016-04-20	410-587-3XXX	3000–3999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-587-4XXX	4000–4999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-587-5XXX	5000–5999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-587-6XXX	6000–6999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-587-8XXX	8000–8999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-587-9XXX	9000–9999	Assigned	HD CARRIER LLC	321J	ARBUTUS	MD
2016-04-20	410-657-0XXX	0000–0999	Assigned	ONVOY, LLC - MD	876D	PARKVILLE	MD
2016-04-20	410-670-0XXX	0000–0999	Assigned	ONVOY, LLC - MD	876D	EDGEWOOD	MD
2016-04-20	410-695-9XXX	9000–9999	Assigned	ONVOY, LLC - MD	876D	ODENTON	MD
2016-04-20	410-941-6XXX	6000–6999	Assigned	ONVOY, LLC - MD	876D	JARRETTSVL	MD
2016-04-06	410-582-2XXX	2000–2999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	GLENBURNIE	MD
2016-04-06	410-582-3XXX	3000–3999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	GLENBURNIE	MD
2016-03-21	410-855-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-03-21	410-855-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-03-21	410-855-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	GLENBURNIE	MD
2016-03-17	410-429-1XXX	1000–1999	Assigned	ONVOY, LLC - MD	876D	WORTHINGTN	MD
2016-03-17	410-429-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	WORTHINGTN	MD
2016-03-16	410-204-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	ARBUTUS	MD
2016-03-16	410-216-0XXX	0000–0999	Assigned	ONVOY, LLC - MD	876D	ANNAPOLIS	MD
2016-03-16	410-339-1XXX	1000–1999	Assigned	ONVOY, LLC - MD	876D	TOWSON	MD
2016-03-16	410-343-4XXX	4000–4999	Assigned	ONVOY, LLC - MD	876D	SPARKSGLNC	MD
2016-03-16	410-401-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	BRYNPKLNCM	MD
2016-03-16	410-559-9XXX	9000–9999	Assigned	ONVOY, LLC - MD	876D	PIKESVILLE	MD
2016-03-16	410-642-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	PERRYVILLE	MD
2016-03-16	410-642-7XXX	7000–7999	Assigned	ONVOY, LLC - MD	876D	PERRYVILLE	MD
2016-03-16	410-671-0XXX	0000–0999	Assigned	ONVOY, LLC - MD	876D	EDGEWOOD	MD
2016-03-16	410-891-6XXX	6000–6999	Assigned	ONVOY, LLC - MD	876D	COCKEYSVL	MD
2016-03-16	410-941-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	JARRETTSVL	MD

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.