NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

25 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 19
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-01-12 650-989-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SSNFRNCSCO CA
2007-01-12 650-995-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L REDWOOD CY CA
2006-12-28 650-356-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN MATEO CA
2006-12-28 650-887-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C LOS ALTOS CA
2006-12-28 650-963-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E MT VIEW CA
2006-12-27 650-427-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-27 650-427-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PALO ALTO CA
2006-12-14 650-452-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2006-12-14 650-618-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E PALO ALTO CA
2006-12-01 650-641-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2006-11-07 650-242-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2006-11-07 650-393-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN MATEO CA
2006-10-19 650-362-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C REDWOOD CY CA
2006-10-10 650-930-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 MT VIEW CA
2006-10-05 650-561-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2006-10-05 650-561-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PALO ALTO CA
2006-10-03 650-388-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2006-10-03 650-388-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 PALO ALTO CA
2006-09-18 650-376-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN MATEO CA
2006-09-14 650-235-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN MATEO CA
2006-09-14 650-350-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SAN MATEO CA
2006-09-14 650-438-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2006-09-13 650-392-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SSNFRNCSCO CA
2006-09-13 650-515-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SSNFRNCSCO CA
2006-09-05 650-391-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2006-09-05 650-391-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2006-09-05 650-391-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2006-09-05 650-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2006-09-05 650-521-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2006-08-23 650-440-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HALFMOONBY CA
2006-08-23 650-450-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2006-08-23 650-587-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDWOOD CY CA
2006-08-23 650-646-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2006-08-22 650-492-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALTOS CA
2006-08-18 650-433-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2006-08-18 650-433-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 PALO ALTO CA
2006-08-04 650-282-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C MT VIEW CA
2006-08-04 650-294-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C SAN MATEO CA
2006-08-04 650-305-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LOS ALTOS CA
2006-08-04 650-863-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2006-08-04 650-863-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2006-08-04 650-863-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2006-08-04 650-863-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN MATEO CA
2006-07-26 650-293-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SAN MATEO 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.