Recent thousands-block assignments

1 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 301

ONVOY, LLC - MD 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
2014-04-08	301-546-2XXX	2000–2999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-3XXX	3000–3999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-4XXX	4000–4999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-5XXX	5000–5999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-6XXX	6000–6999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-7XXX	7000–7999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-8XXX	8000–8999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-08	301-546-9XXX	9000–9999	Assigned	VERIZON MARYLAND, INC.	9212	WSHNGTNZN4	MD
2014-04-03	301-703-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	MOUNT AIRY	MD
2014-03-26	301-761-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	WSNGTNZN11	MD
2014-03-10	301-501-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC - DC	4036	OAKLAND	MD
2014-03-10	301-969-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	BRUNSWICK	MD
2014-03-05	301-666-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	WSNG236Z14	MD
2014-02-28	301-463-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	LONACONING	MD
2014-02-28	301-786-8XXX	8000–8999	Assigned	COMCAST IP PHONE, LLC	318J	MCCOOLE	MD
2014-02-27	301-278-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WSHNGTNZN5	MD
2014-02-27	301-569-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GAITHERSBG	MD
2014-02-27	301-569-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GAITHERSBG	MD
2014-02-11	301-547-8XXX	8000–8999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	WSHNGTNZN2	MD
2014-01-28	301-761-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	WSNGTNZN11	MD
2014-01-14	301-304-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	WALKERSVL	MD
2014-01-07	301-798-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MD	6119	DAMASCS240	MD
2013-11-27	301-569-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	GAITHERSBG	MD
2013-11-14	301-812-6XXX	6000–6999	Assigned	YMAX COMMUNICATIONS CORP. - MD	281E	WSNG238Z15	MD
2013-11-12	301-804-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ASHTON236	MD
2013-11-12	301-804-8XXX	8000–8999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	ASHTON236	MD
2013-10-01	301-965-8XXX	8000–8999	Assigned	PEERLESS NETWORK OF MARYLAND, LLC	568G	WSHNGTNZN6	MD
2013-09-12	301-283-7XXX	7000–7999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN6	MD
2013-09-12	301-283-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN6	MD
2013-09-12	301-541-9XXX	9000–9999	Assigned	OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC	6855	WSHNGTNZN5	MD
2013-09-10	301-288-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	WSNGTNZN12	MD
2013-09-09	301-822-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	WSNGTNZN11	MD
2013-09-06	301-732-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	FREDERICK	MD
2013-09-05	301-569-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	GAITHERSBG	MD
2013-08-30	301-366-0XXX	0000–0999	Assigned	COMCAST IP PHONE, LLC	318J	GAITHERSBG	MD
2013-08-23	301-539-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	LA PLATA	MD
2013-08-16	301-812-5XXX	5000–5999	Assigned	PAETEC ITEL, LLC	829J	WSNG238Z15	MD
2013-08-15	301-557-9XXX	9000–9999	Assigned	COMCAST IP PHONE, LLC	318J	WSHNGTNZN3	MD
2013-08-15	301-636-3XXX	3000–3999	Assigned	COMCAST IP PHONE, LLC	318J	WSHNGTNZN5	MD
2013-08-13	301-660-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - MD	071F	KEEDYSVL	MD
2013-08-12	301-836-0XXX	0000–0999	Assigned	IP HORIZON LLC	515J	WSHNGTNZN5	MD
2013-08-12	301-971-9XXX	9000–9999	Assigned	IP HORIZON LLC	515J	WSHNGTNZN6	MD
2013-08-06	301-882-4XXX	4000–4999	Assigned	COMCAST IP PHONE, LLC	318J	NEW MARKET	MD
2013-08-05	301-354-6XXX	6000–6999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	WSNGTNZN10	MD
2013-08-05	301-692-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	WSNGTNZN11	MD
2013-08-05	301-844-7XXX	7000–7999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	WSHNGTNZN3	MD
2013-08-02	301-456-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD	6395	WSHNGTNZN5	MD
2013-08-01	301-569-5XXX	5000–5999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	GAITHERSBG	MD
2013-08-01	301-880-8XXX	8000–8999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	LXTNPKGRML	MD
2013-07-22	301-296-6XXX	6000–6999	Assigned	COMCAST IP PHONE, LLC	318J	WSNGTNZN10	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.