NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

4 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 510
ONVOY, LLC - CA 3
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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2018-12-03 510-954-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2018-11-29 510-476-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2018-11-29 510-605-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2018-11-29 510-616-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2018-11-29 510-616-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2018-11-29 510-726-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2018-11-29 510-804-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2018-11-29 510-804-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2018-11-29 510-905-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2018-11-29 510-905-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2018-11-29 510-930-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2018-11-29 510-930-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2018-11-12 510-905-0XXX 0000–0999Assigned TELNYX LLC 073H OKLD ALMD CA
2018-11-09 510-804-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2018-11-07 510-745-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2018-10-19 510-627-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 OKLD MN-PD CA
2018-10-18 510-266-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2018-10-18 510-605-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2018-10-18 510-804-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ELSBR-PINL CA
2018-10-17 510-804-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2018-10-16 510-616-5XXX 5000–5999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2018-10-10 510-989-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2018-10-10 510-989-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2018-10-10 510-989-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2018-10-09 510-529-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD BKLY CA
2018-10-08 510-609-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RICHMOND CA
2018-10-04 510-852-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2018-10-04 510-852-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2018-10-04 510-930-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2018-10-02 510-440-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK OLIVR CA
2018-09-24 510-726-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CROCKETT CA
2018-09-24 510-955-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD TRNID CA
2018-09-21 510-930-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OKLD FRTVL CA
2018-09-17 510-905-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2018-09-13 510-605-1XXX 1000–1999Assigned METROPCS, INC. 5562 HAYWARD CA
2018-09-12 510-518-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2018-09-10 510-605-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HAYWARD CA
2018-09-07 510-605-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2018-09-07 510-605-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2018-09-04 510-617-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2018-09-04 510-617-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C HRCUL-RODE CA
2018-08-30 510-607-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD MN-PD CA
2018-08-28 510-513-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2018-08-23 510-605-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2018-08-23 510-605-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2018-08-14 510-609-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2018-07-18 510-989-1XXX 1000–1999Assigned SONIC TELECOM, LLC - CA 433E OKLD BKLY CA
2018-07-03 510-518-4XXX 4000–4999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H FRNK MAIN CA
2018-07-03 510-571-5XXX 5000–5999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H HAYWARD CA
2018-07-03 510-607-6XXX 6000–6999Assigned INTEGRATED PATH COMMUNICATIONS, LLC - CA 707H OKLD MN-PD 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.