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
2005-08-25 415-624-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-23 415-483-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7145 IGNACIO CA
2005-08-17 415-234-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L IGNACIO CA
2005-08-17 415-408-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NOVATO CA
2005-08-17 415-599-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2005-08-17 415-599-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 NOVATO CA
2005-08-17 415-686-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2005-08-17 415-686-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SAN RAFAEL CA
2005-08-10 415-992-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-10 415-992-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-10 415-992-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-10 415-992-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-10 415-992-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-10 415-992-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SNFC CNTRL CA
2005-08-05 415-312-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-05 415-439-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-05 415-439-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-05 415-632-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-05 415-632-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SNFC CNTRL CA
2005-08-03 415-814-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C SNFC CNTRL CA
2005-07-26 415-630-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NICASIO CA
2005-07-26 415-690-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELVEDERE CA
2005-07-22 415-342-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2005-07-22 415-419-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN RAFAEL CA
2005-07-22 415-962-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2005-07-22 415-962-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNFC CNTRL CA
2005-07-18 415-504-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-504-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-573-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-6XXX 6000–6999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-7XXX 7000–7999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-8XXX 8000–8999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-574-9XXX 9000–9999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-632-0XXX 0000–0999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2005-07-18 415-632-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNFC CNTRL CA
2005-07-18 415-933-1XXX 1000–1999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-933-2XXX 2000–2999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-933-3XXX 3000–3999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-933-4XXX 4000–4999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-18 415-933-5XXX 5000–5999Assigned METROPCS, INC. 5562 SNFC MT-EV CA
2005-07-11 415-480-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C SAUSALITO CA
2005-07-11 415-599-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C NOVATO CA
2005-07-07 415-202-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-07-07 415-623-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-07-07 415-623-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-07-07 415-623-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-07-07 415-623-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SNFC CNTRL CA
2005-06-29 415-992-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.