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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2003-12-23 650-492-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LOS ALTOS CA
2003-12-22 650-243-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-12-22 650-243-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-12-17 650-384-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2003-12-05 650-353-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PALO ALTO CA
2003-10-10 650-922-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-09-26 650-240-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SAN MATEO CA
2003-09-22 650-282-1XXX 1000–1999Assigned TWILIO INTERNATIONAL, INC. 506J MT VIEW CA
2003-09-22 650-282-2XXX 2000–2999Assigned IP HORIZON LLC 515J MT VIEW CA
2003-09-22 650-490-1XXX 1000–1999Assigned IP HORIZON LLC 515J MILLBRAE CA
2003-09-22 650-490-2XXX 2000–2999Assigned IP HORIZON LLC 515J MILLBRAE CA
2003-09-22 650-563-1XXX 1000–1999Assigned IP HORIZON LLC 515J MOSS BEACH CA
2003-09-22 650-563-2XXX 2000–2999Assigned IP HORIZON LLC 515J MOSS BEACH CA
2003-09-22 650-730-1XXX 1000–1999Assigned IP HORIZON LLC 515J SNCRL-BLMT CA
2003-09-22 650-730-2XXX 2000–2999Assigned TWILIO INTERNATIONAL, INC. 506J SNCRL-BLMT CA
2003-09-12 650-804-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2003-09-12 650-804-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2003-09-03 650-238-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-09-03 650-238-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-08-21 650-206-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 WOODSIDE CA
2003-08-21 650-262-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PESCADERO CA
2003-08-21 650-263-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MOSS BEACH CA
2003-08-21 650-290-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 PACIFICA CA
2003-08-21 650-419-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 LA HONDA CA
2003-08-05 650-557-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 PACIFICA CA
2003-07-15 650-201-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-07-10 650-804-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2003-05-23 650-228-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-03-19 650-238-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2003-03-19 650-804-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2003-03-03 650-265-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 MT VIEW CA
2003-03-03 650-419-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 LA HONDA CA
2003-01-03 650-284-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 HALFMOONBY CA
2002-12-17 650-249-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 REDWOOD CY CA
2002-12-17 650-488-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2002-12-09 650-466-1XXX 1000–1999Assigned PACIFIC BELL 9740 SNFC JUNPR CA
2002-12-09 650-466-2XXX 2000–2999Assigned PACIFIC BELL 9740 SNFC JUNPR CA
2002-12-09 650-466-3XXX 3000–3999Assigned PACIFIC BELL 9740 SNFC JUNPR CA
2002-12-09 650-466-4XXX 4000–4999Assigned PACIFIC BELL 9740 SNFC JUNPR CA
2002-12-09 650-466-5XXX 5000–5999Assigned PACIFIC BELL 9740 SNFC JUNPR CA
2002-11-09 650-451-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PACIFICA CA
2002-11-09 650-898-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PACIFICA CA
2002-10-31 650-438-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SSNFRNCSCO CA
2002-10-31 650-804-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2002-10-31 650-804-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2002-10-31 650-804-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALO ALTO CA
2002-10-04 650-746-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC JUNPR CA
2002-08-22 650-623-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MT VIEW CA
2002-08-22 650-623-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MT VIEW CA
2002-06-25 650-449-5XXX 5000–5999Assigned AT&T - LOCAL 7421 SNFC JUNPR 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.