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
2023-10-23 385-512-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2023-10-23 385-544-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2023-10-05 385-556-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2023-10-05 385-556-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2023-10-05 385-556-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2023-09-28 385-480-2XXX 2000–2999Assigned CENTRAL TELCOM SVCS DBA CENTRACOM INTERACTIVE - NV 791D PROVO UT
2023-09-28 385-534-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2023-09-28 385-554-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2023-09-25 385-551-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-25 385-551-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 MURRAY UT
2023-09-14 385-452-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PROVO UT
2023-09-14 385-452-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E PROVO UT
2023-09-14 385-472-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PROVO UT
2023-09-14 385-480-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E PROVO UT
2023-09-14 385-480-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PROVO UT
2023-09-14 385-553-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E MORGAN UT
2023-09-14 385-554-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-14 385-554-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2023-09-12 385-469-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2023-09-12 385-521-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2023-09-06 385-551-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2023-09-05 385-510-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2023-08-17 385-874-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2023-08-15 385-508-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2023-08-15 385-508-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2023-08-09 385-550-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2023-08-09 385-550-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2023-08-08 385-541-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2023-08-02 385-541-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SALT LAKE UT
2023-08-02 385-541-1XXX 1000–1999Assigned BOOST SUBSCRIBERCO L.L.C. 490J SALT LAKE UT
2023-08-02 385-548-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-02 385-548-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-02 385-548-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-02 385-548-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-01 385-547-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-01 385-547-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-01 385-547-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2023-08-01 385-547-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 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.