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
2019-09-25 510-988-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-08-16 510-977-9XXX 9000–9999Assigned TELNYX LLC 073H OKLD BKLY CA
2019-08-15 510-980-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2019-08-15 510-980-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FRNK MAIN CA
2019-08-15 510-988-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-08-15 510-988-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-08-14 510-617-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HRCUL-RODE CA
2019-08-07 510-726-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CROCKETT CA
2019-08-07 510-929-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2019-08-07 510-929-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2019-08-07 510-955-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2019-08-07 510-955-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2019-08-07 510-961-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2019-08-07 510-961-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK GRNLF CA
2019-08-07 510-977-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2019-08-07 510-980-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2019-08-07 510-980-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2019-08-07 510-980-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2019-08-07 510-980-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2019-08-07 510-983-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2019-08-07 510-983-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2019-08-07 510-988-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD FRTVL CA
2019-08-07 510-998-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2019-08-07 510-998-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C ELSBR-PINL CA
2019-08-05 510-998-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2019-08-05 510-998-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2019-07-31 510-618-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2019-07-31 510-807-5XXX 5000–5999Assigned METROPCS, INC. 5562 HAYWARD CA
2019-07-31 510-956-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD ALMD CA
2019-07-31 510-961-4XXX 4000–4999Assigned METROPCS, INC. 5562 FRNK GRNLF CA
2019-07-29 510-994-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2019-07-18 510-980-2XXX 2000–2999Assigned METROPCS, INC. 5562 FRNK MAIN CA
2019-07-16 510-998-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ELSBR-PINL CA
2019-07-15 510-998-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ELSBR-PINL CA
2019-07-12 510-929-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OKLD MN-PD CA
2019-07-12 510-961-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2019-07-12 510-961-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2019-07-12 510-988-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL CA
2019-07-03 510-989-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2019-07-02 510-929-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2019-07-02 510-955-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2019-07-02 510-955-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2019-07-02 510-983-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2019-07-02 510-983-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2019-06-27 510-505-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2019-06-27 510-983-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2019-06-18 510-960-7XXX 7000–7999Assigned AT&T - LOCAL 7421 OKLD BKLY CA
2019-06-14 510-609-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2019-06-14 510-609-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E RICHMOND CA
2019-06-14 510-988-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OKLD FRTVL 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.