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
2020-04-27 530-886-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2020-04-16 530-393-7XXX 7000–7999Assigned TELNYX LLC 073H WILLIAMS CA
2020-04-16 530-439-1XXX 1000–1999Assigned TELNYX LLC 073H PRINCETON CA
2020-04-16 530-479-2XXX 2000–2999Assigned TELNYX LLC 073H VERDI CA
2020-04-15 530-782-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2020-04-15 530-931-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SUSANVILLE CA
2020-04-14 530-803-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E COTTONWOOD CA
2020-04-07 530-309-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WOODLAND CA
2020-04-03 530-319-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2020-04-03 530-319-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 REDDING CA
2020-04-03 530-727-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RED BLUFF CA
2020-04-03 530-821-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2020-04-03 530-821-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MARYSVILLE CA
2020-04-01 530-620-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLVL SOUTH CA
2020-04-01 530-651-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PLVL WEST CA
2020-03-31 530-234-5XXX 5000–5999Assigned FRACTEL, LLC 965H RAVENDALE CA
2020-03-25 530-557-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 NEVADACITY CA
2020-03-18 530-393-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 WILLIAMS CA
2020-03-18 530-796-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 GUINDA CA
2020-03-16 530-591-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2020-03-09 530-922-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OROVILLE CA
2020-03-03 530-450-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AUBN MAIN CA
2020-02-28 530-560-1XXX 1000–1999Assigned METROPCS, INC. 5562 REDDING CA
2020-02-28 530-560-2XXX 2000–2999Assigned METROPCS, INC. 5562 REDDING CA
2020-02-26 530-561-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ANDERSON CA
2020-02-25 530-393-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 WILLIAMS CA
2020-02-25 530-619-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 COLUSA CA
2020-02-10 530-451-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SMARTSVL CA
2020-02-10 530-787-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F ESPARTO CA
2020-02-04 530-484-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C ELK CREEK CA
2020-02-04 530-612-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RANCHOTHMA CA
2020-02-04 530-675-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CHALLENGE CA
2020-01-20 530-619-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 COLUSA CA
2020-01-14 530-720-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CHICO CA
2020-01-14 530-854-2XXX 2000–2999Assigned METROPCS, INC. 5562 OROVILLE CA
2019-12-23 530-560-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2019-12-23 530-560-8XXX 8000–8999Assigned METROPCS, INC. 5562 REDDING CA
2019-12-20 530-783-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2019-12-18 530-450-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F AUBN MAIN CA
2019-12-10 530-451-1XXX 1000–1999Assigned TELNYX LLC 073H SMARTSVL CA
2019-12-02 530-855-5XXX 5000–5999Assigned FRACTEL, LLC 965H CHICO CA
2019-11-22 530-203-4XXX 4000–4999Assigned TELNYX LLC 073H ELK CREEK CA
2019-11-22 530-560-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 REDDING CA
2019-11-18 530-490-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F WOODLAND CA
2019-11-18 530-759-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 DAVIS CA
2019-11-04 530-499-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PLVL WEST CA
2019-10-10 530-537-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBN MAIN CA
2019-10-02 530-853-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C MCCLOUD CA
2019-09-30 530-484-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C ELK CREEK CA
2019-09-30 530-618-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HOOPA 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.