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
2011-09-13 650-258-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
2011-09-13 650-258-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
2011-09-13 650-258-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
2011-09-13 650-258-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 PALO ALTO CA
2011-09-07 650-235-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2011-09-07 650-278-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SSNFRNCSCO CA
2011-09-07 650-362-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REDWOOD CY CA
2011-09-07 650-362-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C REDWOOD CY CA
2011-09-07 650-397-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LOS ALTOS CA
2011-09-07 650-463-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2011-09-07 650-614-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C PALO ALTO CA
2011-09-07 650-924-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2011-09-02 650-394-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNCRL-BLMT CA
2011-09-01 650-336-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MT VIEW CA
2011-09-01 650-389-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN MATEO CA
2011-09-01 650-754-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SSNFRNCSCO CA
2011-08-24 650-518-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LOS ALTOS CA
2011-08-24 650-784-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2011-08-24 650-863-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2011-08-24 650-963-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MT VIEW CA
2011-08-23 650-999-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C PALO ALTO CA
2011-08-22 650-404-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2011-08-18 650-494-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2011-08-18 650-550-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2011-08-16 650-754-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 SSNFRNCSCO CA
2011-08-15 650-474-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2011-08-15 650-474-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDWOOD CY CA
2011-08-05 650-295-1XXX 1000–1999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2011-08-05 650-388-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2011-08-05 650-390-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2011-08-05 650-458-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2011-08-05 650-752-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J PALO ALTO CA
2011-08-02 650-489-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2011-08-02 650-489-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2011-08-02 650-729-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HALFMOONBY CA
2011-07-28 650-263-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MOSS BEACH CA
2011-07-28 650-297-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PESCADERO CA
2011-07-27 650-485-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2011-07-27 650-889-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2011-07-22 650-336-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C MT VIEW CA
2011-07-11 650-389-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN MATEO CA
2011-06-17 650-532-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2011-06-07 650-798-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-06-07 650-798-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-06-07 650-798-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-06-07 650-842-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-05-27 650-468-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2011-05-27 650-517-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2011-05-27 650-517-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2011-05-27 650-517-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E 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.