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
2014-09-30 385-231-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2014-09-30 385-238-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E OGDEN UT
2014-09-30 385-238-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E OGDEN UT
2014-09-30 385-238-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 OGDEN UT
2014-09-30 385-269-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2014-09-30 385-269-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2014-09-30 385-374-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E LEHI UT
2014-09-30 385-374-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E LEHI UT
2014-09-30 385-777-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2014-09-30 385-777-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E BOUNTIFUL UT
2014-09-30 385-800-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E MURRAY UT
2014-09-30 385-831-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2014-09-29 385-231-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KAYSVILLE UT
2014-09-29 385-238-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2014-09-29 385-265-0XXX 0000–0999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 AMERCNFORK UT
2014-09-29 385-265-6XXX 6000–6999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 AMERCNFORK UT
2014-09-29 385-519-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E CLEARFIELD UT
2014-09-29 385-519-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E CLEARFIELD UT
2014-09-29 385-800-9XXX 9000–9999Assigned FIRSTDIGITAL TELECOM, LLC - UT 5727 MURRAY UT
2014-09-26 385-241-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-09-26 385-309-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PROVO UT
2014-09-25 385-269-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2014-09-25 385-269-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2014-09-24 385-309-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2014-09-24 385-309-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2014-09-24 385-309-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2014-09-24 385-309-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2014-09-24 385-325-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SPRINGVL UT
2014-09-24 385-325-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SPRINGVL UT
2014-09-18 385-237-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2014-09-18 385-237-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2014-09-18 385-237-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2014-09-18 385-237-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2014-09-18 385-237-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2014-09-18 385-265-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2014-09-18 385-265-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2014-09-18 385-309-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-09-18 385-309-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2014-09-18 385-350-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MORGAN UT
2014-09-18 385-375-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E PROVO UT
2014-09-18 385-419-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-18 385-419-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-18 385-419-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-18 385-419-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-18 385-831-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-18 385-831-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2014-09-15 385-238-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2014-09-15 385-241-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-09-15 385-241-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2014-09-15 385-419-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 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.