Recent thousands-block assignments

18 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 661

ONVOY, LLC - CA 10

TELEPORT COMMUNICATIONS AMERICA, LLC - CA 3

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 3

PEERLESS NETWORK OF CALIFORNIA, LLC - CA 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
2011-03-25	661-513-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SNCA SGCC	CA
2011-03-25	661-513-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SNCA SGCC	CA
2011-03-14	661-474-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	DELANO	CA
2011-03-11	661-401-3XXX	3000–3999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-03-11	661-401-4XXX	4000–4999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-03-09	661-436-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	ARVIN	CA
2011-03-09	661-773-7XXX	7000–7999	Assigned	AT&T ENTERPRISES, LLC	516C	WALKERBSIN	CA
2011-03-08	661-540-3XXX	3000–3999	Assigned	METROPCS NETWORKS, LLC	899D	PLDL PLDL	CA
2011-03-08	661-759-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	WASCO	CA
2011-03-08	661-800-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	BKFD MAIN	CA
2011-03-02	661-388-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNCA NHCS	CA
2011-03-02	661-388-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNCA NHCS	CA
2011-03-02	661-480-7XXX	7000–7999	Assigned	TWC IP ENABLED SERVICES, LLC	793K	PLDL PLDL	CA
2011-02-26	661-544-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	PLDL PLDL	CA
2011-02-26	661-544-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	PLDL PLDL	CA
2011-02-23	661-800-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-02-23	661-862-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-02-17	661-380-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-02-17	661-380-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	BKFD MAIN	CA
2011-02-15	661-615-3XXX	3000–3999	Assigned	AT&T ENTERPRISES, LLC	516C	BKFD NORTH	CA
2011-02-01	661-868-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	BKFD MAIN	CA
2011-01-25	661-450-7XXX	7000–7999	Assigned	METROPCS NETWORKS, LLC	899D	PLDL AGDL	CA
2011-01-24	661-474-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	DELANO	CA
2011-01-14	661-388-2XXX	2000–2999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SNCA NHCS	CA
2011-01-11	661-388-8XXX	8000–8999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SNCA NHCS	CA
2011-01-11	661-438-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	WASCO	CA
2011-01-11	661-474-1XXX	1000–1999	Assigned	METROPCS, INC.	5562	DELANO	CA
2011-01-03	661-666-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	SNCA NHCS	CA
2010-12-17	661-262-9XXX	9000–9999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	LAKEHUGHES	CA
2010-12-17	661-388-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SNCA NHCS	CA
2010-12-08	661-380-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	BKFD MAIN	CA
2010-12-08	661-380-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	BKFD MAIN	CA
2010-12-07	661-390-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	ARVIN	CA
2010-11-30	661-412-9XXX	9000–9999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	BKFD SOUTH	CA
2010-11-17	661-474-2XXX	2000–2999	Assigned	AT&T ENTERPRISES, LLC	516C	DELANO	CA
2010-11-09	661-347-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	SNCA SGCC	CA
2010-11-09	661-379-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	BKFD MAIN	CA
2010-11-09	661-438-1XXX	1000–1999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	WASCO	CA
2010-11-09	661-474-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	DELANO	CA
2010-11-09	661-524-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	LANCASTER	CA
2010-11-03	661-292-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7139	SHAFTER	CA
2010-11-03	661-465-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	BERENDMESA	CA
2010-11-03	661-777-3XXX	3000–3999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	LEBEC	CA
2010-11-03	661-800-0XXX	0000–0999	Assigned	ONVOY, LLC - CA	649C	BKFD MAIN	CA
2010-10-27	661-228-0XXX	0000–0999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	HI VISTA	CA
2010-10-14	661-422-8XXX	8000–8999	Assigned	UTILITY TELECOM GROUP, LLC - CA	9262	PLDL LNVY	CA
2010-10-01	661-238-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	TEHACHAPI	CA
2010-09-27	661-888-3XXX	3000–3999	Assigned	METROPCS NETWORKS, LLC	899D	SNCA NHCS	CA
2010-09-24	661-888-1XXX	1000–1999	Assigned	TWC IP ENABLED SERVICES, LLC	793K	SNCA NHCS	CA
2010-09-15	661-544-2XXX	2000–2999	Assigned	METROPCS NETWORKS, LLC	899D	PLDL PLDL	CA

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.