NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

17 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2005-01-04 650-557-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PACIFICA CA
2004-12-13 650-265-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2004-11-23 650-267-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SSNFRNCSCO CA
2004-11-23 650-267-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SSNFRNCSCO CA
2004-11-12 650-273-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2004-11-12 650-273-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2004-11-02 650-200-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2004-11-02 650-267-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2004-09-23 650-353-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2004-09-22 650-777-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLBRAE CA
2004-09-16 650-384-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2004-08-31 650-388-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2004-08-31 650-388-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2004-08-24 650-515-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2004-08-24 650-515-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2004-08-19 650-451-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 PACIFICA CA
2004-08-03 650-353-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2004-07-28 650-515-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2004-07-06 650-200-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2004-07-06 650-267-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2004-07-06 650-353-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2004-07-06 650-353-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2004-07-06 650-861-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MT VIEW CA
2004-06-10 650-716-6XXX 6000–6999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2004-06-10 650-716-7XXX 7000–7999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2004-06-10 650-716-8XXX 8000–8999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2004-06-10 650-716-9XXX 9000–9999Assigned METROPCS, INC. 5562 REDWOOD CY CA
2004-04-27 650-253-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-27 650-253-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MT VIEW CA
2004-04-13 650-267-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2004-04-07 650-267-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SSNFRNCSCO CA
2004-03-16 650-490-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MILLBRAE CA
2004-03-16 650-529-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 WOODSIDE CA
2004-03-16 650-897-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MOSS BEACH CA
2004-03-12 650-206-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WOODSIDE CA
2004-02-11 650-380-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2004-02-11 650-380-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2004-02-05 650-804-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2004-01-12 650-267-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SSNFRNCSCO CA
2004-01-12 650-393-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN MATEO CA
2004-01-12 650-450-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J MT VIEW CA
2003-12-23 650-276-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HALFMOONBY CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.