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
2011-03-21 650-416-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2011-03-16 650-683-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WOODSIDE CA
2011-03-14 650-627-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MATEO CA
2011-03-14 650-830-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNCRL-BLMT CA
2011-03-11 650-308-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-03-08 650-282-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2011-03-08 650-350-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-03-02 650-209-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LOS ALTOS CA
2011-03-02 650-307-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLBRAE CA
2011-03-02 650-307-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MILLBRAE CA
2011-03-02 650-479-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E HALFMOONBY CA
2011-03-02 650-539-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-03-02 650-539-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2011-03-02 650-735-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2011-03-02 650-735-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PACIFICA CA
2011-03-01 650-701-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-03-01 650-701-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E REDWOOD CY CA
2011-02-24 650-453-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNCRL-BLMT CA
2011-02-19 650-492-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALTOS CA
2011-02-10 650-610-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNCRL-BLMT CA
2011-02-09 650-733-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PACIFICA CA
2011-02-04 650-933-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2011-02-04 650-933-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2011-01-31 650-554-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2011-01-25 650-289-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2011-01-19 650-392-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SSNFRNCSCO CA
2011-01-19 650-561-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-01-19 650-561-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-01-19 650-924-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2011-01-14 650-544-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN MATEO CA
2011-01-14 650-918-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN MATEO CA
2011-01-07 650-690-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2011-01-06 650-622-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNCRL-BLMT CA
2010-12-23 650-308-0XXX 0000–0999Assigned PACIFIC BELL 9740 PALO ALTO CA
2010-12-23 650-308-1XXX 1000–1999Assigned PACIFIC BELL 9740 PALO ALTO CA
2010-12-23 650-308-2XXX 2000–2999Assigned PACIFIC BELL 9740 PALO ALTO CA
2010-12-23 650-308-3XXX 3000–3999Assigned PACIFIC BELL 9740 PALO ALTO CA
2010-12-17 650-937-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2010-12-09 650-889-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2010-12-03 650-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2010-12-03 650-621-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 PALO ALTO CA
2010-11-30 650-461-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2010-11-29 650-752-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2010-11-17 650-391-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C PALO ALTO CA
2010-11-09 650-394-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SNCRL-BLMT CA
2010-11-09 650-458-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2010-11-09 650-522-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2010-11-09 650-669-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2010-11-09 650-877-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SSNFRNCSCO CA
2010-11-03 650-409-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLBRAE 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.