NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

34 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 442
NEW CINGULAR WIRELESS PCS, LLC 14
ONVOY, LLC - CA 10
HD CARRIER LLC 4
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - 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
2020-03-11 442-307-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INDIO CA
2020-02-26 442-303-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OCSD CRLS CA
2020-02-26 442-382-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VTVL HSPR CA
2020-02-13 442-315-2XXX 2000–2999Assigned CSC WIRELESS, LLC 425J PALM SPG CA
2020-02-10 442-314-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-314-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-337-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-350-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-350-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-02-10 442-380-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-380-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-380-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-380-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-10 442-380-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-02-05 442-307-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INDIO CA
2020-02-04 442-231-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2020-02-04 442-231-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2020-02-03 442-309-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BARSTOW CA
2020-01-25 442-936-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E WRWD PHLN CA
2020-01-24 442-248-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-01-24 442-248-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-01-24 442-257-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-01-24 442-777-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-01-14 442-309-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C BARSTOW CA
2020-01-14 442-309-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BARSTOW CA
2020-01-14 442-309-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C BARSTOW CA
2020-01-13 442-279-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BRAWLEY 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.