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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2020-12-17 442-351-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-17 442-351-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-17 442-351-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-17 442-351-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-17 442-351-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2020-12-17 442-352-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-17 442-352-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-16 442-353-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-16 442-353-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-16 442-353-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-16 442-353-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-16 442-353-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-15 442-292-4XXX 4000–4999Assigned TERRA NOVA TELECOM INC. 145J VTVL APVY CA
2020-12-15 442-423-3XXX 3000–3999Assigned MCC TELEPHONY OF THE WEST, LLC - CA 857F LKISABELLA CA
2020-12-10 442-303-1XXX 1000–1999Assigned METROPCS, INC. 5562 OCSD CRLS CA
2020-12-10 442-303-4XXX 4000–4999Assigned METROPCS, INC. 5562 OCSD CRLS CA
2020-12-10 442-303-5XXX 5000–5999Assigned METROPCS, INC. 5562 OCSD CRLS CA
2020-12-10 442-341-0XXX 0000–0999Assigned METROPCS, INC. 5562 ESCONDIDO CA
2020-12-10 442-432-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CALEXICO CA
2020-12-09 442-344-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-09 442-344-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-07 442-338-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-07 442-338-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-07 442-338-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-07 442-338-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-07 442-338-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALM SPG CA
2020-12-04 442-577-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PAUMA VLY CA
2020-12-02 442-786-0XXX 0000–0999Assigned TELNYX LLC 073H BLYTHE CA
2020-12-01 442-342-1XXX 1000–1999Assigned IP HORIZON LLC 515J PALM SPG CA
2020-12-01 442-343-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-01 442-343-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-01 442-343-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-01 442-343-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL CA
2020-12-01 442-343-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 VICTORVL 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.