NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

24 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 530
ONVOY, LLC - CA 9
BANDWIDTH.COM CLEC, LLC - CA 6
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 4
OPENTACT INC. 3
T-MOBILE USA, 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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-09-20 530-799-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2020-09-19 530-866-1XXX 1000–1999Assigned TELNYX LLC 073H COLFAX CA
2020-09-16 530-977-1XXX 1000–1999Assigned TELNYX LLC 073H AUBN NORTH CA
2020-09-03 530-248-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2020-09-03 530-248-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2020-09-03 530-382-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 AUBN MAIN CA
2020-09-01 530-608-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TRUCKEE CA
2020-08-28 530-866-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F COLFAX CA
2020-08-27 530-382-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2020-08-27 530-382-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2020-08-20 530-651-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PLVL WEST CA
2020-08-20 530-922-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OROVILLE CA
2020-08-11 530-490-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 WOODLAND CA
2020-08-11 530-576-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C LOSMOLINOS CA
2020-08-11 530-651-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLVL WEST CA
2020-08-11 530-826-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 CHICO CA
2020-08-11 530-887-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AUBN MAIN CA
2020-08-11 530-977-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AUBN NORTH CA
2020-08-07 530-416-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SOUTHTAHOE CA
2020-08-07 530-560-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2020-08-07 530-560-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2020-08-03 530-455-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LIVE OAK CA
2020-07-24 530-334-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GEORGETOWN CA
2020-07-24 530-450-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L AUBN MAIN CA
2020-07-24 530-799-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2020-07-24 530-799-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MARYSVILLE CA
2020-07-24 530-883-2XXX 2000–2999Assigned METROPCS, INC. 5562 AUBN MAIN CA
2020-07-21 530-614-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SHINGLESPG CA
2020-07-10 530-883-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 AUBN MAIN CA
2020-07-08 530-399-9XXX 9000–9999Assigned FRACTEL, LLC 965H CHICO CA
2020-07-08 530-829-4XXX 4000–4999Assigned FRACTEL, LLC 965H CHICO CA
2020-07-07 530-270-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 GRVY MAIN CA
2020-07-07 530-608-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TRUCKEE CA
2020-07-07 530-883-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2020-07-07 530-883-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2020-06-18 530-922-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OROVILLE CA
2020-06-17 530-447-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ALLEGHANY CA
2020-06-17 530-447-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ALLEGHANY CA
2020-06-17 530-447-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ALLEGHANY CA
2020-06-11 530-953-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2020-06-09 530-293-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C PLVL KYBRZ CA
2020-06-09 530-296-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PLVL KYBRZ CA
2020-06-02 530-699-9XXX 9000–9999Assigned FRACTEL, LLC 965H DUNNIGAN CA
2020-06-02 530-866-6XXX 6000–6999Assigned FRACTEL, LLC 965H COLFAX CA
2020-06-02 530-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H AUBN NORTH CA
2020-05-27 530-800-8XXX 8000–8999Assigned FRACTEL, LLC 965H CHICO CA
2020-05-26 530-572-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 YREKA CA
2020-05-19 530-792-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DAVIS CA
2020-05-06 530-799-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D MARYSVILLE CA
2020-05-06 530-799-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D MARYSVILLE 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.