NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 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 415
BOOST SUBSCRIBERCO L.L.C. 1
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
2008-04-04 415-230-7XXX 7000–7999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2008-04-04 415-230-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2008-04-04 415-644-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2008-04-03 415-230-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2008-04-03 415-230-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2008-03-31 415-230-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2008-03-28 415-975-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2008-03-26 415-684-6XXX 6000–6999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2008-03-25 415-827-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2008-03-24 415-685-0XXX 0000–0999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2008-03-13 415-349-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC JUNPR CA
2008-03-04 415-230-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2008-02-15 415-684-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2008-02-08 415-405-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2008-02-04 415-202-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2008-01-22 415-655-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2008-01-17 415-889-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2008-01-16 415-490-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2008-01-16 415-490-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2008-01-11 415-450-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2008-01-04 415-323-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2008-01-04 415-323-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2007-12-13 415-742-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC MT-EV CA
2007-12-10 415-525-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-12-10 415-525-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-12-10 415-525-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-12-10 415-525-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2007-12-03 415-848-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2007-11-28 415-483-8XXX 8000–8999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J IGNACIO CA
2007-11-28 415-798-3XXX 3000–3999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J NOVATO CA
2007-11-28 415-944-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAUSALITO CA
2007-11-20 415-525-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2007-11-20 415-525-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC CNTRL CA
2007-11-09 415-680-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC MT-EV CA
2007-10-30 415-405-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNFC JUNPR CA
2007-10-24 415-349-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNFC JUNPR CA
2007-10-17 415-682-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2007-10-15 415-684-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2007-10-15 415-684-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2007-10-08 415-827-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 NOVATO CA
2007-09-26 415-418-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2007-09-25 415-578-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2007-09-18 415-230-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2007-09-07 415-683-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC MT-EV CA
2007-08-23 415-524-5XXX 5000–5999Assigned METROPCS, INC. 5562 SAN RAFAEL CA
2007-08-23 415-524-6XXX 6000–6999Assigned METROPCS, INC. 5562 SAN RAFAEL CA
2007-08-20 415-525-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SNFC CNTRL CA
2007-08-17 415-419-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SAN RAFAEL CA
2007-08-14 415-632-4XXX 4000–4999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2007-08-14 415-632-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL 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.