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
2011-04-12 510-969-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2011-04-12 510-982-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2011-04-12 510-999-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-04-12 510-999-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-04-12 510-999-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-04-12 510-999-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-04-12 510-999-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-03-31 510-924-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD TRNID CA
2011-03-30 510-342-8XXX 8000–8999Assigned METROPCS, INC. 5562 HAYWARD CA
2011-03-25 510-239-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD ALMD CA
2011-03-16 510-488-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD FRTVL CA
2011-03-14 510-350-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD MN-PD CA
2011-03-08 510-227-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2011-02-28 510-982-9XXX 9000–9999Assigned METROPCS, INC. 5562 OKLD BKLY CA
2011-02-25 510-730-8XXX 8000–8999Assigned METROPCS, INC. 5562 RICHMOND CA
2011-02-09 510-688-9XXX 9000–9999Assigned METROPCS, INC. 5562 HAYWARD CA
2011-02-09 510-880-9XXX 9000–9999Assigned METROPCS, INC. 5562 HAYWARD CA
2011-02-07 510-999-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2011-02-04 510-746-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2011-01-24 510-394-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID CA
2011-01-24 510-575-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2011-01-24 510-689-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2011-01-19 510-306-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD ALMD CA
2011-01-19 510-344-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK OLIVR CA
2011-01-19 510-402-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2011-01-19 510-779-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E ELSBR-PINL CA
2011-01-19 510-859-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2011-01-14 510-284-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRNK MAIN CA
2011-01-14 510-509-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRNK MAIN CA
2011-01-11 510-509-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C FRNK MAIN CA
2011-01-11 510-999-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C HAYWARD CA
2011-01-10 510-224-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HRCUL-RODE CA
2011-01-10 510-698-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD FRTVL CA
2011-01-10 510-972-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK GRNLF CA
2011-01-10 510-992-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD MN-PD CA
2011-01-05 510-542-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2011-01-05 510-542-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2011-01-04 510-463-8XXX 8000–8999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 OKLD MN-PD CA
2011-01-04 510-730-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J RICHMOND CA
2010-12-22 510-542-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD BKLY CA
2010-12-21 510-730-6XXX 6000–6999Assigned METROPCS, INC. 5562 RICHMOND CA
2010-12-13 510-313-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 HRCUL-RODE CA
2010-12-10 510-474-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRNK GRNLF CA
2010-12-10 510-474-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 FRNK GRNLF CA
2010-12-07 510-564-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD TRNID CA
2010-12-03 510-402-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2010-12-03 510-402-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E FRNK MAIN CA
2010-11-19 510-817-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2010-11-17 510-270-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2010-11-17 510-969-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OKLD TRNID 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.