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
2013-06-14	831-237-6XXX	6000–6999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	SOLEDAD	CA
2013-06-04	831-313-1XXX	1000–1999	Assigned	CHARTER IP ENABLED SERVICES, LLC	792K	HOLLISTER	CA
2013-06-03	831-250-5XXX	5000–5999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	CARMEL	CA
2013-06-03	831-515-2XXX	2000–2999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA CRUZ	CA
2013-06-03	831-515-9XXX	9000–9999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA CRUZ	CA
2013-05-29	831-278-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	BEN LOMOND	CA
2013-05-08	831-661-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	APTOS	CA
2013-04-10	831-205-8XXX	8000–8999	Assigned	METROPCS, INC.	5562	HOLLISTER	CA
2013-04-08	831-293-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	CARMEL	CA
2013-04-08	831-471-7XXX	7000–7999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	SANTA CRUZ	CA
2013-04-08	831-800-7XXX	7000–7999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	SALINAS	CA
2013-04-03	831-246-8XXX	8000–8999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	BEN LOMOND	CA
2013-04-03	831-675-4XXX	4000–4999	Assigned	AT&T - LOCAL	7421	GONZALES	CA
2013-03-05	831-217-4XXX	4000–4999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BOULDERCRK	CA
2013-03-05	831-531-3XXX	3000–3999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	APTOS	CA
2013-03-05	831-609-3XXX	3000–3999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	BEN LOMOND	CA
2013-03-05	831-704-3XXX	3000–3999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	FELTON	CA
2013-03-05	831-726-4XXX	4000–4999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	WATSONVL	CA
2013-03-01	831-428-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	SANTA CRUZ	CA
2013-02-15	831-508-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	FELTON	CA
2013-02-07	831-620-5XXX	5000–5999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	CARMEL	CA
2013-01-22	831-574-4XXX	4000–4999	Assigned	U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS	671J	CARMEL	CA
2013-01-15	831-718-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	MONTEREY	CA
2012-12-19	831-884-5XXX	5000–5999	Assigned	COMCAST PHONE OF CALIFORNIA, LLC	394L	MONTEREY	CA
2012-12-07	831-440-6XXX	6000–6999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA	6006	SANTA CRUZ	CA
2012-12-05	831-218-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	BEN LOMOND	CA
2012-12-05	831-218-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	BEN LOMOND	CA
2012-12-05	831-222-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	FELTON	CA
2012-12-05	831-222-8XXX	8000–8999	Assigned	ONVOY, LLC - CA	649C	FELTON	CA
2012-12-05	831-274-1XXX	1000–1999	Assigned	ONVOY, LLC - CA	649C	WATSONVL	CA
2012-12-05	831-274-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	WATSONVL	CA
2012-12-04	831-610-5XXX	5000–5999	Assigned	ONVOY, LLC - CA	649C	BOULDERCRK	CA
2012-12-04	831-610-6XXX	6000–6999	Assigned	ONVOY, LLC - CA	649C	BOULDERCRK	CA
2012-12-04	831-610-7XXX	7000–7999	Assigned	ONVOY, LLC - CA	649C	BOULDERCRK	CA
2012-12-04	831-612-2XXX	2000–2999	Assigned	ONVOY, LLC - CA	649C	APTOS	CA
2012-12-04	831-612-3XXX	3000–3999	Assigned	ONVOY, LLC - CA	649C	APTOS	CA
2012-12-04	831-612-4XXX	4000–4999	Assigned	ONVOY, LLC - CA	649C	APTOS	CA
2012-11-28	831-536-3XXX	3000–3999	Assigned	SONIC TELECOM, LLC - CA	433E	WATSONVL	CA
2012-11-28	831-687-7XXX	7000–7999	Assigned	SONIC TELECOM, LLC - CA	433E	APTOS	CA
2012-11-26	831-205-9XXX	9000–9999	Assigned	T-MOBILE USA, INC.	6529	HOLLISTER	CA
2012-11-19	831-535-7XXX	7000–7999	Assigned	SONIC TELECOM, LLC - CA	433E	SANTA CRUZ	CA
2012-11-14	831-769-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	SALINAS	CA
2012-11-14	831-783-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - CA	981E	SALINAS	CA
2012-11-07	831-652-3XXX	3000–3999	Assigned	AT&T ENTERPRISES, LLC	516C	CARMEL VLY	CA
2012-10-01	831-238-8XXX	8000–8999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	CARMEL	CA
2012-10-01	831-460-6XXX	6000–6999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	CA
2012-10-01	831-461-8XXX	8000–8999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	CA
2012-10-01	831-469-8XXX	8000–8999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	CA
2012-10-01	831-471-6XXX	6000–6999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	CA
2012-10-01	831-824-1XXX	1000–1999	Assigned	PEERLESS NETWORK OF CALIFORNIA, LLC - CA	373F	SANTA CRUZ	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.