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
2014-05-27 385-355-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-05-27 385-355-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-05-13 385-695-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2014-05-07 385-888-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-05-02 385-236-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E PROVO UT
2014-04-30 385-888-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J KAYSVILLE UT
2014-04-24 385-404-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PAYSON UT
2014-04-24 385-404-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PAYSON UT
2014-04-24 385-404-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PAYSON UT
2014-04-24 385-449-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2014-04-24 385-449-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2014-04-23 385-217-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-23 385-217-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-22 385-695-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2014-04-17 385-325-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2014-04-17 385-325-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPRINGVL UT
2014-04-16 385-288-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-04-16 385-288-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-04-16 385-393-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2014-04-16 385-393-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2014-04-16 385-626-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2014-04-16 385-999-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2014-04-16 385-999-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2014-04-15 385-209-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2014-04-15 385-236-5XXX 5000–5999Assigned FIRSTDIGITAL COMMUNICATIONS, LLC 716D PROVO UT
2014-04-10 385-355-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-04-10 385-626-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 OGDEN UT
2014-04-08 385-213-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-08 385-213-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2014-04-02 385-374-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 LEHI UT
2014-04-02 385-528-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-04-02 385-528-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-04-02 385-528-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2014-04-02 385-528-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 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.