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
2015-04-21	410-204-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ARBUTUS	MD
2015-04-21	410-297-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ABERDEEN	MD
2015-04-21	410-297-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ABERDEEN	MD
2015-04-14	410-469-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	BALTIMORE	MD
2015-04-14	410-525-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2015-04-09	410-424-6XXX	6000–6999	Assigned	ONVOY, LLC - MD	876D	GLENBURNIE	MD
2015-04-06	410-684-8XXX	8000–8999	Assigned	VERIZON MARYLAND, INC.	9212	GLENBURNIE	MD
2015-03-27	410-943-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	HURLOCK	MD
2015-03-24	410-216-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	ANNAPOLIS	MD
2015-03-10	410-469-9XXX	9000–9999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	MD
2015-03-10	410-553-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	GLENBURNIE	MD
2015-03-06	410-390-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	OCEAN CITY	MD
2015-03-06	410-904-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	WATERLO238	MD
2015-02-23	410-277-1XXX	1000–1999	Assigned	IP HORIZON LLC	515J	WOODLAWN	MD
2015-02-23	410-565-8XXX	8000–8999	Assigned	IP HORIZON LLC	515J	ARBUTUS	MD
2015-02-19	410-705-9XXX	9000–9999	Assigned	IP HORIZON LLC	515J	WATERLO236	MD
2015-01-26	410-469-8XXX	8000–8999	Assigned	ONVOY, LLC - MD	876D	BALTIMORE	MD
2015-01-14	410-705-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WATERLO236	MD
2015-01-02	410-762-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2015-01-02	410-762-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	GLENBURNIE	MD
2014-12-02	410-943-5XXX	5000–5999	Assigned	COMCAST IP PHONE, LLC	318J	HURLOCK	MD
2014-10-13	410-275-6XXX	6000–6999	Assigned	PAETEC ITEL, LLC	829J	CECILTON	MD
2014-10-13	410-831-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	SALISBURY	MD
2014-10-13	410-831-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	SALISBURY	MD
2014-10-09	410-834-8XXX	8000–8999	Assigned	ONVOY, LLC - MD	876D	WATERLO236	MD
2014-10-09	410-834-9XXX	9000–9999	Assigned	ONVOY, LLC - MD	876D	WATERLO236	MD
2014-10-01	410-831-4XXX	4000–4999	Assigned	METROPCS, INC.	5562	SALISBURY	MD
2014-10-01	410-831-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	SALISBURY	MD
2014-09-24	410-275-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	CECILTON	MD
2014-09-24	410-482-1XXX	1000–1999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	GREENSBORO	MD
2014-09-24	410-648-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	GALENA	MD
2014-09-24	410-705-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WATERLO236	MD
2014-09-22	410-600-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	BERLIN	MD
2014-09-22	410-831-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	SALISBURY	MD
2014-09-03	410-983-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	FORK	MD
2014-09-03	410-983-6XXX	6000–6999	Assigned	ONVOY, LLC - MD	876D	FORK	MD
2014-09-02	410-390-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	OCEAN CITY	MD
2014-08-22	410-600-1XXX	1000–1999	Assigned	PAETEC ITEL, LLC	829J	BERLIN	MD
2014-08-22	410-621-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	PRINCEANNE	MD
2014-08-07	410-921-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2014-07-01	410-618-1XXX	1000–1999	Assigned	ONVOY, LLC - MD	876D	PERRYVILLE	MD
2014-07-01	410-921-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	SEVERN	MD
2014-06-24	410-469-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2014-06-24	410-469-7XXX	7000–7999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2014-06-10	410-449-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	SOLOMONS	MD
2014-05-29	410-697-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	MILLERSVL	MD
2014-05-19	410-226-3XXX	3000–3999	Assigned	PAETEC ITEL, LLC	829J	OXFORD	MD
2014-05-19	410-601-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	MD
2014-05-19	410-617-0XXX	0000–0999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	MD
2014-05-19	410-617-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	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.