Recent thousands-block assignments

21 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 559

NEW CINGULAR WIRELESS PCS, LLC 4

HD CARRIER LLC 4

EXIANT COMMUNICATIONS LLC 4

BANDWIDTH.COM CLEC, LLC - CA 4

OPENTACT INC. 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
2011-11-16	559-399-5XXX	5000–5999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	SANGER	CA
2011-11-14	559-254-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	PARLIER	CA
2011-11-14	559-329-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	TULARE	CA
2011-11-14	559-517-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MADERA	CA
2011-11-10	559-364-2XXX	2000–2999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SANJOAQUIN	CA
2011-11-10	559-407-8XXX	8000–8999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	FIREBAUGH	CA
2011-10-20	559-549-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	FRESNO	CA
2011-10-19	559-436-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2011-10-19	559-451-5XXX	5000–5999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2011-10-19	559-486-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	FRESNO	CA
2011-10-18	559-860-4XXX	4000–4999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	FRESNO	CA
2011-10-12	559-223-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	CHOWCHILLA	CA
2011-10-10	559-365-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2011-10-10	559-365-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2011-10-05	559-777-2XXX	2000–2999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2011-10-05	559-777-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2011-10-05	559-777-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2011-10-05	559-777-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2011-09-22	559-817-3XXX	3000–3999	Assigned	MCIMETRO ACCESS TRANSMISSION SERVICES LLC	7229	LEMOORE	CA
2011-09-21	559-856-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SELMA	CA
2011-09-21	559-856-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SELMA	CA
2011-09-21	559-856-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	SELMA	CA
2011-09-15	559-366-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	TULARE	CA
2011-09-13	559-514-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	MADERA	CA
2011-09-13	559-515-4XXX	4000–4999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	FRESNO	CA
2011-09-13	559-544-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	PORTERVL	CA
2011-09-09	559-201-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	CHOWCHILLA	CA
2011-09-09	559-467-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	TULARE	CA
2011-09-09	559-471-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	VISALIA	CA
2011-09-08	559-203-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	CLOVIS	CA
2011-09-08	559-316-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	FOWLER	CA
2011-09-08	559-406-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	DINUBA	CA
2011-09-08	559-594-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	EXETER	CA
2011-09-08	559-634-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	KINGSBURG	CA
2011-09-08	559-793-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	PORTERVL	CA
2011-09-08	559-876-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	SANGER	CA
2011-09-07	559-512-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	FRESNO	CA
2011-09-01	559-740-7XXX	7000–7999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	VISALIA	CA
2011-08-31	559-554-9XXX	9000–9999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	FRESNO	CA
2011-08-31	559-797-4XXX	4000–4999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	CLOVIS	CA
2011-08-30	559-554-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	FRESNO	CA
2011-08-30	559-554-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	FRESNO	CA
2011-08-23	559-554-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2011-08-23	559-554-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2011-08-23	559-554-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2011-08-23	559-852-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	HANFORD	CA
2011-08-18	559-580-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	COARSEGOLD	CA
2011-08-16	559-726-1XXX	1000–1999	Assigned	WIDE VOICE, LLC - CA	252F	REEDLEY	CA
2011-08-16	559-802-5XXX	5000–5999	Assigned	AT&T ENTERPRISES, LLC	516C	VISALIA	CA
2011-08-15	559-567-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	KERMAN	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.