Recent thousands-block assignments

13 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 831

ONVOY, LLC - CA 10

EXIANT COMMUNICATIONS LLC 2

BANDWIDTH.COM CLEC, LLC - CA 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
2020-11-19	831-665-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	HOLLISTER	CA
2020-11-11	831-249-2XXX	2000–2999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BIG SUR	CA
2020-11-05	831-243-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	SALINAS	CA
2020-11-05	831-243-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	SALINAS	CA
2020-11-05	831-243-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	SALINAS	CA
2020-11-05	831-243-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	SALINAS	CA
2020-11-02	831-677-7XXX	7000–7999	Assigned	FRACTEL, LLC	965H	SOLEDAD	CA
2020-11-02	831-855-5XXX	5000–5999	Assigned	FRACTEL, LLC	965H	MONTEREY	CA
2020-10-27	831-461-3XXX	3000–3999	Assigned	TELNYX LLC	073H	SANTA CRUZ	CA
2020-10-23	831-348-2XXX	2000–2999	Assigned	T-MOBILE USA, INC.	6529	WATSONVL	CA
2020-10-23	831-529-7XXX	7000–7999	Assigned	T-MOBILE USA, INC.	6529	SANTA CRUZ	CA
2020-10-21	831-292-1XXX	1000–1999	Assigned	METROPCS, INC.	5562	SOLEDAD	CA
2020-10-21	831-785-0XXX	0000–0999	Assigned	METROPCS, INC.	5562	SALINAS	CA
2020-10-21	831-785-1XXX	1000–1999	Assigned	METROPCS, INC.	5562	SALINAS	CA
2020-10-02	831-215-8XXX	8000–8999	Assigned	HD CARRIER LLC	321J	MONTEREY	CA
2020-10-02	831-215-9XXX	9000–9999	Assigned	HD CARRIER LLC	321J	MONTEREY	CA
2020-09-29	831-297-5XXX	5000–5999	Assigned	METROPCS, INC.	5562	HOLLISTER	CA
2020-09-14	831-243-0XXX	0000–0999	Assigned	T-MOBILE USA, INC.	6529	SALINAS	CA
2020-09-14	831-243-1XXX	1000–1999	Assigned	T-MOBILE USA, INC.	6529	SALINAS	CA
2020-08-30	831-597-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SALINAS	CA
2020-08-30	831-597-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SALINAS	CA
2020-08-30	831-597-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SALINAS	CA
2020-08-30	831-597-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SALINAS	CA
2020-08-30	831-597-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	SALINAS	CA
2020-08-30	831-684-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-30	831-684-5XXX	5000–5999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-30	831-684-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-30	831-689-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-30	831-689-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-30	831-689-6XXX	6000–6999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	APTOS	CA
2020-08-25	831-348-4XXX	4000–4999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	WATSONVL	CA
2020-08-19	831-356-0XXX	0000–0999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	SALINAS	CA
2020-08-11	831-278-7XXX	7000–7999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BEN LOMOND	CA
2020-08-11	831-529-1XXX	1000–1999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	CA
2020-08-07	831-652-0XXX	0000–0999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	CARMEL VLY	CA
2020-08-07	831-657-7XXX	7000–7999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	MONTEREY	CA
2020-08-07	831-877-2XXX	2000–2999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	CARMEL	CA
2020-07-29	831-877-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CARMEL	CA
2020-07-24	831-830-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-22	831-387-1XXX	1000–1999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-22	831-387-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-22	831-387-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-22	831-387-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-22	831-525-0XXX	0000–0999	Assigned	ONVOY, LLC - CA	649C	KING CITY	CA
2020-07-16	831-785-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SALINAS	CA
2020-07-10	831-220-4XXX	4000–4999	Assigned	T-MOBILE USA, INC.	6529	MONTEREY	CA
2020-07-10	831-220-5XXX	5000–5999	Assigned	T-MOBILE USA, INC.	6529	MONTEREY	CA
2020-07-10	831-297-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	HOLLISTER	CA
2020-07-10	831-356-3XXX	3000–3999	Assigned	T-MOBILE USA, INC.	6529	SALINAS	CA
2020-07-10	831-356-4XXX	4000–4999	Assigned	T-MOBILE USA, INC.	6529	SALINAS	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.