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
2011-03-07	410-390-9XXX	9000–9999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	OCEAN CITY	MD
2011-03-07	410-629-5XXX	5000–5999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	BERLIN	MD
2011-03-07	410-629-8XXX	8000–8999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	BERLIN	MD
2011-03-07	410-881-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SHERWD FOR	MD
2011-03-07	410-896-7XXX	7000–7999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	DELMAR	MD
2011-03-07	410-896-8XXX	8000–8999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	DELMAR	MD
2011-03-03	410-725-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	EASTON	MD
2011-03-03	410-888-7XXX	7000–7999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	WATERLO236	MD
2011-01-31	410-415-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PIKESVILLE	MD
2011-01-31	410-921-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SEVERN	MD
2011-01-31	410-946-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SEVERNA PK	MD
2011-01-04	410-304-4XXX	4000–4999	Assigned	PAETEC ITEL, LLC	829J	QUEENSTOWN	MD
2011-01-04	410-928-9XXX	9000–9999	Assigned	PAETEC ITEL, LLC	829J	MILLINGTON	MD
2010-12-14	410-881-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SHERWD FOR	MD
2010-12-13	410-656-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	NORTH EAST	MD
2010-11-03	410-402-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	CATONSVL	MD
2010-11-02	410-513-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2010-11-02	410-671-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2010-11-02	410-999-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	GLENBURNIE	MD
2010-10-21	410-999-2XXX	2000–2999	Assigned	BALTIMORE-WASHINGTON TELEPHONE (BWT)	8697	GLENBURNIE	MD
2010-10-21	410-999-3XXX	3000–3999	Assigned	BALTIMORE-WASHINGTON TELEPHONE (BWT)	8697	GLENBURNIE	MD
2010-10-08	410-656-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MD	7228	NORTH EAST	MD
2010-09-28	410-497-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2010-09-28	410-921-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SEVERN	MD
2010-09-28	410-996-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ELKTON	MD
2010-09-24	410-205-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PIKESVILLE	MD
2010-09-21	410-538-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	FORK	MD
2010-09-01	410-441-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	ELKTON	MD
2010-08-27	410-690-7XXX	7000–7999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	EASTON	MD
2010-08-26	410-953-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	COLUMBIA	MD
2010-08-05	410-441-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ELKTON	MD
2010-08-05	410-692-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	JARRETTSVL	MD
2010-08-04	410-824-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WATERLO236	MD
2010-08-04	410-921-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SEVERN	MD
2010-08-04	410-988-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	ELLICOTTCY	MD
2010-07-20	410-834-2XXX	2000–2999	Assigned	PEERLESS NETWORK OF MARYLAND, LLC	568G	WATERLO236	MD
2010-07-16	410-246-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2010-07-07	410-861-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	WESTMINSTR	MD
2010-07-02	410-443-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	EASTON	MD
2010-07-01	410-835-5XXX	5000–5999	Assigned	MCC TELEPHONY OF THE MID-ATLANTIC, LLC - MD	861F	WILLARDS	MD
2010-06-25	410-973-1XXX	1000–1999	Assigned	MCC TELEPHONY OF THE MID-ATLANTIC, LLC - MD	861F	BERLIN	MD
2010-06-16	410-205-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PIKESVILLE	MD
2010-06-01	410-479-7XXX	7000–7999	Assigned	PAETEC ITEL, LLC	829J	DENTON	MD
2010-05-28	410-417-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	EDGEWOOD	MD
2010-05-28	410-449-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	SOLOMONS	MD
2010-05-28	410-489-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	GLENWOOD	MD
2010-05-28	410-657-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2010-03-22	410-497-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PARKVILLE	MD
2010-03-05	410-779-9XXX	9000–9999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2010-02-16	410-205-8XXX	8000–8999	Assigned	PAETEC ITEL, LLC	829J	PIKESVILLE	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.