NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 650
ONVOY, LLC - CA 11
T-MOBILE USA, INC. 4
BANDWIDTH.COM CLEC, LLC - CA 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
2005-06-02 650-392-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2005-05-26 650-242-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-05-20 650-210-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MT VIEW CA
2005-05-20 650-396-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MT VIEW CA
2005-05-20 650-396-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MT VIEW CA
2005-05-20 650-396-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C MT VIEW CA
2005-05-13 650-265-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2005-05-13 650-265-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2005-05-12 650-515-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2005-05-12 650-515-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2005-05-11 650-229-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C LOS ALTOS CA
2005-05-10 650-268-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PESCADERO CA
2005-05-10 650-268-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PESCADERO CA
2005-05-10 650-275-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOODSIDE CA
2005-05-10 650-275-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOODSIDE CA
2005-05-10 650-275-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 WOODSIDE CA
2005-05-10 650-618-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2005-05-10 650-618-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2005-05-10 650-618-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2005-04-20 650-200-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2005-04-20 650-200-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2005-04-12 650-646-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2005-03-16 650-376-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2005-03-16 650-454-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C REDWOOD CY CA
2005-03-11 650-815-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2005-03-08 650-396-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2005-03-08 650-539-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2005-03-08 650-646-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2005-03-07 650-278-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2005-03-07 650-676-6XXX 6000–6999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SSNFRNCSCO CA
2005-03-02 650-293-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-03-02 650-293-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-24 650-242-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-24 650-242-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-18 650-452-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SSNFRNCSCO CA
2005-02-18 650-515-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SSNFRNCSCO CA
2005-02-18 650-646-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2005-02-18 650-646-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2005-02-17 650-204-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C MILLBRAE CA
2005-02-17 650-215-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2005-02-17 650-242-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-17 650-270-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SSNFRNCSCO CA
2005-02-17 650-319-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2005-02-04 650-288-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-04 650-288-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2005-02-02 650-276-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HALFMOONBY CA
2005-01-28 650-305-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LOS ALTOS CA
2005-01-21 650-262-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PESCADERO CA
2005-01-21 650-419-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA HONDA CA
2005-01-06 650-489-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCRL-BLMT 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.