Recent thousands-block assignments

70 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 667

NEW CINGULAR WIRELESS PCS, LLC - DC 38

ONVOY, LLC - MD 18

BANDWIDTH.COM CLEC, LLC - MD 6

METROPCS, INC. 2

INTRADO COMMUNICATIONS, LLC 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
2018-06-01	667-277-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	SHERWD FOR	MD
2018-05-25	667-321-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	PRINCEFRCK	MD
2018-05-24	667-226-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	STMICHAELS	MD
2018-05-24	667-226-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	STMICHAELS	MD
2018-05-24	667-226-5XXX	5000–5999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	STMICHAELS	MD
2018-05-24	667-285-2XXX	2000–2999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	HURLOCK	MD
2018-05-24	667-285-3XXX	3000–3999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	HURLOCK	MD
2018-05-24	667-285-4XXX	4000–4999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	HURLOCK	MD
2018-05-23	667-307-5XXX	5000–5999	Assigned	CORE COMMUNICATIONS, INC.- MD	2593	CROFTON	MD
2018-05-02	667-666-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WEST RIVER	MD
2018-04-30	667-201-5XXX	5000–5999	Assigned	ONVOY, LLC - MD	876D	BEL AIR	MD
2018-04-30	667-230-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	CENTREVL	MD
2018-04-30	667-240-8XXX	8000–8999	Assigned	ONVOY, LLC - MD	876D	COLUMBIA	MD
2018-04-25	667-204-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ANNAPOLIS	MD
2018-04-19	667-201-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	BEL AIR	MD
2018-04-05	667-227-1XXX	1000–1999	Assigned	METROPCS, INC.	5562	SALISBURY	MD
2018-04-04	667-232-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	GLENBURNIE	MD
2018-03-26	667-201-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2018-03-26	667-240-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	COLUMBIA	MD
2018-03-26	667-367-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	WESTMINSTR	MD
2018-03-23	667-352-0XXX	0000–0999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2018-03-07	667-967-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GLENBURNIE	MD
2018-02-16	667-230-0XXX	0000–0999	Assigned	PEERLESS NETWORK OF MARYLAND, LLC	568G	CENTREVL	MD
2018-01-29	667-215-8XXX	8000–8999	Assigned	ONVOY, LLC - MD	876D	ELKTON	MD
2018-01-08	667-352-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2018-01-08	667-352-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2017-12-26	667-226-2XXX	2000–2999	Assigned	PAETEC ITEL, LLC	829J	STMICHAELS	MD
2017-12-06	667-285-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - MD	7325	HURLOCK	MD
2017-12-05	667-200-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	COLUMBIA	MD
2017-11-21	667-253-2XXX	2000–2999	Assigned	ONVOY, LLC - MD	876D	SALISBURY	MD
2017-11-21	667-253-3XXX	3000–3999	Assigned	ONVOY, LLC - MD	876D	SALISBURY	MD
2017-11-08	667-204-2XXX	2000–2999	Assigned	COMCAST IP PHONE, LLC	318J	ANNAPOLIS	MD
2017-10-31	667-352-5XXX	5000–5999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2017-10-31	667-352-6XXX	6000–6999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ABERDEEN	MD
2017-10-17	667-201-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	BEL AIR	MD
2017-09-28	667-314-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	WESTMINSTR	MD
2017-09-21	667-400-0XXX	0000–0999	Assigned	ONVOY, LLC - MD	876D	BALTIMORE	MD
2017-09-15	667-227-0XXX	0000–0999	Assigned	ATLANTECH ONLINE, INC. - MD	361H	SALISBURY	MD
2017-09-11	667-221-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SALISBURY	MD
2017-09-11	667-221-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	SALISBURY	MD
2017-09-07	667-260-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	BALTIMORE	MD
2017-09-06	667-314-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WESTMINSTR	MD
2017-08-31	667-220-1XXX	1000–1999	Assigned	TELNYX LLC	073H	GREENSBORO	MD
2017-08-31	667-226-1XXX	1000–1999	Assigned	TELNYX LLC	073H	STMICHAELS	MD
2017-08-31	667-285-1XXX	1000–1999	Assigned	TELNYX LLC	073H	HURLOCK	MD
2017-08-31	667-291-1XXX	1000–1999	Assigned	TELNYX LLC	073H	MILLINGTON	MD
2017-08-30	667-260-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	BALTIMORE	MD
2017-08-22	667-215-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ELKTON	MD
2017-08-21	667-204-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	ANNAPOLIS	MD
2017-08-18	667-321-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	PRINCEFRCK	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.