NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

16 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 385
LEVEL 3 COMMUNICATIONS, LLC - UT 5
BANDWIDTH.COM CLEC, LLC - UT 5
NEW CINGULAR WIRELESS PCS, LLC 4
ONVOY, LLC - UT 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
2021-01-20 385-855-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2021-01-20 385-855-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2021-01-18 385-365-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2021-01-18 385-365-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2021-01-18 385-365-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2021-01-18 385-365-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2021-01-18 385-365-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2021-01-13 385-364-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E OGDEN UT
2021-01-13 385-364-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E OGDEN UT
2021-01-13 385-379-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-13 385-379-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-13 385-379-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-13 385-379-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-13 385-395-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-395-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-01-13 385-402-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-01-13 385-402-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-01-13 385-483-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-13 385-483-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-13 385-483-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-13 385-483-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-11 385-427-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-11 385-427-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-11 385-427-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-11 385-427-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-11 385-427-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-11 385-427-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-01-07 385-340-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-01-07 385-340-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-01-07 385-341-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-07 385-341-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-01-07 385-349-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-07 385-378-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MURRAY UT
2021-01-07 385-378-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E MURRAY UT
2021-01-07 385-378-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E MURRAY UT
2021-01-07 385-378-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E MURRAY UT
2021-01-07 385-412-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E PROVO UT
2021-01-07 385-600-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E OGDEN UT
2021-01-07 385-600-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E OGDEN UT
2021-01-07 385-600-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E OGDEN UT
2020-12-23 385-378-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2020-12-18 385-372-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT

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.