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
2020-09-10 385-369-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-10 385-369-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2020-09-08 385-365-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2020-09-08 385-365-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2020-09-08 385-853-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2020-09-08 385-853-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2020-09-04 385-358-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2020-09-04 385-358-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2020-09-04 385-358-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2020-09-04 385-358-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2020-09-04 385-358-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2020-09-03 385-359-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-03 385-359-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-03 385-359-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-03 385-359-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-03 385-359-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-09-03 385-376-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-03 385-376-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-03 385-376-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-03 385-376-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-03 385-376-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PLEASATGRV UT
2020-09-02 385-316-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2020-09-02 385-316-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2020-09-02 385-358-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-08-28 385-307-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2020-08-28 385-307-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2020-08-28 385-307-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2020-08-28 385-307-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2020-08-28 385-307-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2020-08-28 385-344-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2020-08-28 385-357-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-28 385-357-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-28 385-357-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-28 385-357-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-28 385-357-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AMERCNFORK UT
2020-08-26 385-842-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-08-26 385-842-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-08-26 385-842-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2020-08-24 385-354-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2020-08-24 385-354-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2020-08-24 385-354-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2020-08-24 385-354-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE 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.