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
2016-06-15	559-690-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	VISALIA	CA
2016-06-09	559-615-1XXX	1000–1999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	PORTERVL	CA
2016-06-03	559-580-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	COARSEGOLD	CA
2016-05-31	559-728-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	FRESNO	CA
2016-05-19	559-831-8XXX	8000–8999	Assigned	T-MOBILE USA, INC.	6529	MADERA	CA
2016-05-19	559-831-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	MADERA	CA
2016-05-19	559-835-1XXX	1000–1999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2016-05-19	559-835-2XXX	2000–2999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2016-05-19	559-835-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2016-05-18	559-612-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-05-18	559-612-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-05-18	559-612-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-05-18	559-612-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-05-17	559-383-4XXX	4000–4999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	AVENAL	CA
2016-05-13	559-671-1XXX	1000–1999	Assigned	HD CARRIER LLC	321J	EXETER	CA
2016-05-13	559-671-2XXX	2000–2999	Assigned	HD CARRIER LLC	321J	EXETER	CA
2016-05-13	559-671-3XXX	3000–3999	Assigned	HD CARRIER LLC	321J	EXETER	CA
2016-05-13	559-671-5XXX	5000–5999	Assigned	HD CARRIER LLC	321J	EXETER	CA
2016-05-06	559-328-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	AVENAL	CA
2016-05-02	559-571-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	VISALIA	CA
2016-05-02	559-721-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	FRESNO	CA
2016-04-29	559-571-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	VISALIA	CA
2016-04-26	559-785-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-04-21	559-540-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2016-04-21	559-540-9XXX	9000–9999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2016-04-21	559-548-1XXX	1000–1999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2016-04-21	559-753-2XXX	2000–2999	Assigned	ONVOY, LLC - CA	649C	FRESNO	CA
2016-04-13	559-656-5XXX	5000–5999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	TULARE	CA
2016-04-13	559-656-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	TULARE	CA
2016-04-05	559-401-0XXX	0000–0999	Assigned	IP HORIZON LLC	515J	AVENAL	CA
2016-04-05	559-483-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SPRINGVL	CA
2016-04-05	559-483-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SPRINGVL	CA
2016-04-01	559-601-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	CARUTHERS	CA
2016-03-30	559-885-8XXX	8000–8999	Assigned	T-MOBILE USA, INC.	6529	CARUTHERS	CA
2016-03-28	559-377-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	MADERA	CA
2016-03-28	559-377-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	MADERA	CA
2016-03-22	559-491-6XXX	6000–6999	Assigned	METROPCS, INC.	5562	HANFORD	CA
2016-03-22	559-491-7XXX	7000–7999	Assigned	METROPCS, INC.	5562	HANFORD	CA
2016-03-17	559-205-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	VISALIA	CA
2016-03-17	559-205-9XXX	9000–9999	Assigned	ONVOY, LLC - CA	649C	VISALIA	CA
2016-03-16	559-543-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	HURON	CA
2016-03-16	559-543-9XXX	9000–9999	Assigned	ONVOY, LLC - CA	649C	HURON	CA
2016-03-08	559-465-3XXX	3000–3999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	THREERIVRS	CA
2016-03-04	559-885-2XXX	2000–2999	Assigned	T-MOBILE USA, INC.	6529	CARUTHERS	CA
2016-03-02	559-832-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-03-02	559-899-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2016-03-01	559-462-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	SPRINGVL	CA
2016-03-01	559-462-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	SPRINGVL	CA
2016-02-29	559-702-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	WOODLAKE	CA
2016-02-29	559-702-9XXX	9000–9999	Assigned	ONVOY, LLC - CA	649C	WOODLAKE	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.