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
2012-07-31 510-447-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2012-07-31 510-447-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C RICHMOND CA
2012-07-24 510-500-2XXX 2000–2999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2012-07-24 510-500-6XXX 6000–6999Assigned METROPCS, INC. 5562 OKLD FRTVL CA
2012-07-20 510-990-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-07-19 510-343-1XXX 1000–1999Assigned METROPCS, INC. 5562 OKLD TRNID CA
2012-07-17 510-447-3XXX 3000–3999Assigned METROPCS, INC. 5562 RICHMOND CA
2012-07-17 510-689-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD FRTVL CA
2012-07-13 510-340-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-07-11 510-246-6XXX 6000–6999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-07-11 510-246-7XXX 7000–7999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-07-11 510-254-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD ALMD CA
2012-07-11 510-600-4XXX 4000–4999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-07-10 510-496-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD MN-PD CA
2012-07-10 510-496-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD MN-PD CA
2012-07-10 510-900-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD BKLY CA
2012-07-10 510-900-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 OKLD BKLY CA
2012-07-09 510-254-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD ALMD CA
2012-06-28 510-500-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD FRTVL CA
2012-06-28 510-858-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD MN-PD CA
2012-06-28 510-900-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OKLD BKLY CA
2012-06-21 510-322-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 HRCUL-RODE CA
2012-06-21 510-573-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C FRNK OLIVR CA
2012-06-12 510-495-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2012-06-12 510-549-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2012-06-12 510-666-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2012-06-12 510-859-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OKLD BKLY CA
2012-06-05 510-800-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-800-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-06-05 510-900-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-06-05 510-900-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD BKLY CA
2012-05-23 510-600-7XXX 7000–7999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-05-23 510-600-8XXX 8000–8999Assigned METROPCS, INC. 5562 HAYWARD CA
2012-05-17 510-335-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 FRNK MAIN CA
2012-05-14 510-283-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 ELSBR-PINL CA
2012-05-07 510-340-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-05-07 510-340-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-05-01 510-600-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 HAYWARD CA
2012-04-25 510-254-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-04-25 510-254-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-04-25 510-254-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-04-25 510-254-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-04-25 510-254-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C OKLD ALMD CA
2012-04-25 510-948-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C HRCUL-RODE 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.