NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

16 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 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
2022-01-14 385-452-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2022-01-13 385-481-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-01-13 385-481-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-01-07 385-789-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LEHI UT
2022-01-06 385-488-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2021-12-28 385-453-0XXX 0000–0999Assigned TELNYX LLC 073H OGDEN UT
2021-12-28 385-453-1XXX 1000–1999Assigned TELNYX LLC 073H OGDEN UT
2021-12-23 385-402-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOUNTIFUL UT
2021-12-17 385-452-5XXX 5000–5999Assigned BOOST SUBSCRIBERCO L.L.C. 490J PROVO UT
2021-12-17 385-453-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J OGDEN UT
2021-12-15 385-417-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H AMERCNFORK UT
2021-12-15 385-426-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-12-15 385-426-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-12-15 385-426-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-12-15 385-443-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2021-12-15 385-443-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2021-12-15 385-451-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-451-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H KAYSVILLE UT
2021-12-15 385-503-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BOUNTIFUL UT
2021-12-15 385-503-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BOUNTIFUL UT
2021-12-10 385-622-9XXX 9000–9999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SALT LAKE UT
2021-12-08 385-732-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-12-08 385-732-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-12-08 385-732-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-12-08 385-732-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-12-01 385-458-7XXX 7000–7999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H MORGAN UT
2021-11-18 385-595-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPRINGVL UT
2021-11-12 385-567-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-12 385-567-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-12 385-567-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-12 385-567-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-12 385-866-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-12 385-866-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-11-10 385-403-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H FARMINGTON UT
2021-11-10 385-403-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H FARMINGTON UT
2021-11-10 385-503-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-11-10 385-503-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-11-10 385-503-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-11-10 385-503-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2021-11-09 385-443-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-11-09 385-443-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-11-08 385-443-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-11-08 385-443-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-11-08 385-443-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-11-08 385-443-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT

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.