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
2019-06-12 510-998-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSBR-PINL CA
2019-06-10 510-980-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2019-06-10 510-980-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2019-06-06 510-609-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 RICHMOND CA
2019-06-06 510-960-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-06-06 510-960-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-06-06 510-960-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-06-05 510-496-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-06-05 510-551-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-05-30 510-807-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2019-05-30 510-807-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2019-05-30 510-807-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2019-05-28 510-807-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2019-05-28 510-960-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-05-28 510-960-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-05-28 510-960-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-05-28 510-960-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-05-24 510-890-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2019-05-24 510-929-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2019-05-24 510-998-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2019-05-23 510-929-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2019-05-20 510-518-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-05-20 510-902-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-05-20 510-902-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-05-15 510-954-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2019-05-08 510-988-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2019-05-07 510-983-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2019-05-01 510-609-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2019-04-29 510-902-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK MAIN CA
2019-04-29 510-983-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F FRNK OLIVR CA
2019-04-18 510-955-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD TRNID CA
2019-04-17 510-961-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2019-04-17 510-961-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2019-04-12 510-902-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-04-12 510-902-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-04-12 510-998-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSBR-PINL CA
2019-04-11 510-902-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L FRNK MAIN CA
2019-04-11 510-988-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OKLD FRTVL CA
2019-03-28 510-920-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-03-28 510-920-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-03-28 510-920-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-03-28 510-920-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD MN-PD CA
2019-03-27 510-998-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2019-03-26 510-609-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RICHMOND CA
2019-03-25 510-988-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-03-25 510-988-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-03-20 510-960-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OKLD BKLY CA
2019-03-19 510-954-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HAYWARD CA
2019-03-19 510-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H OKLD BKLY CA
2019-03-05 510-954-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C HAYWARD 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.