Recent thousands-block assignments

21 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2021-03-02	559-401-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	AVENAL	CA
2021-03-02	559-507-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MADERA	CA
2021-02-26	559-532-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	WOODLAKE	CA
2021-02-26	559-819-7XXX	7000–7999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SELMA	CA
2021-02-25	559-388-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	FRESNO	CA
2021-02-22	559-388-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-2XXX	2000–2999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-4XXX	4000–4999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-5XXX	5000–5999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-7XXX	7000–7999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-8XXX	8000–8999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-581-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-22	559-710-0XXX	0000–0999	Assigned	T-MOBILE USA, INC.	6529	FRESNO	CA
2021-02-04	559-338-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	DUNLAP	CA
2021-02-04	559-338-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	DUNLAP	CA
2021-02-04	559-588-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	ALPAUGH	CA
2021-02-04	559-588-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	ALPAUGH	CA
2021-02-04	559-678-2XXX	2000–2999	Assigned	ONVOY, LLC - CA	649C	SQUAW VLY	CA
2021-02-04	559-844-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	MIRANTPHST	CA
2021-02-04	559-844-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	MIRANTPHST	CA
2021-02-04	559-844-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	MIRANTPHST	CA
2021-02-02	559-955-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	TIVYVALLEY	CA
2021-02-02	559-955-9XXX	9000–9999	Assigned	ONVOY, LLC - CA	649C	TIVYVALLEY	CA
2021-02-01	559-335-1XXX	1000–1999	Assigned	TELNYX LLC	073H	GRANTGROVE	CA
2021-01-29	559-560-0XXX	0000–0999	Assigned	T-MOBILE USA, INC.	6529	PORTERVL	CA
2021-01-28	559-282-5XXX	5000–5999	Assigned	TELNYX LLC	073H	AVENAL	CA
2021-01-27	559-262-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2021-01-27	559-420-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2021-01-27	559-421-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2021-01-27	559-509-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	TULARE	CA
2021-01-27	559-552-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	FRESNO	CA
2021-01-12	559-552-4XXX	4000–4999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	FRESNO	CA
2021-01-08	559-491-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	HANFORD	CA
2020-12-23	559-364-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - CA	8826	SANJOAQUIN	CA
2020-12-15	559-665-9XXX	9000–9999	Assigned	TERRA NOVA TELECOM INC.	145J	CHOWCHILLA	CA
2020-12-11	559-332-9XXX	9000–9999	Assigned	TERRA NOVA TELECOM INC.	145J	SQUAW VLY	CA
2020-12-11	559-344-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	FOWLER	CA
2020-12-11	559-561-2XXX	2000–2999	Assigned	TERRA NOVA TELECOM INC.	145J	THREERIVRS	CA
2020-12-11	559-564-6XXX	6000–6999	Assigned	TERRA NOVA TELECOM INC.	145J	WOODLAKE	CA
2020-12-11	559-626-8XXX	8000–8999	Assigned	TERRA NOVA TELECOM INC.	145J	ORANGECOVE	CA
2020-12-11	559-655-5XXX	5000–5999	Assigned	TERRA NOVA TELECOM INC.	145J	MENDOTA	CA
2020-12-11	559-659-6XXX	6000–6999	Assigned	TERRA NOVA TELECOM INC.	145J	FIREBAUGH	CA
2020-12-11	559-867-5XXX	5000–5999	Assigned	TERRA NOVA TELECOM INC.	145J	RIVERDALE	CA
2020-12-11	559-876-7XXX	7000–7999	Assigned	TERRA NOVA TELECOM INC.	145J	SANGER	CA
2020-12-11	559-890-7XXX	7000–7999	Assigned	TELEPORT COMMUNICATIONS AMERICA, LLC - CA	7145	FRESNO	CA
2020-12-11	559-898-8XXX	8000–8999	Assigned	TERRA NOVA TELECOM INC.	145J	SELMA	CA
2020-12-11	559-947-9XXX	9000–9999	Assigned	TERRA NOVA TELECOM INC.	145J	STRATFORD	CA
2020-12-10	559-265-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	FRESNO	CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.