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
2018-08-22 385-260-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2018-08-22 385-337-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2018-07-31 385-421-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2018-07-31 385-492-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2018-07-31 385-492-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2018-07-24 385-337-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2018-07-18 385-270-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-18 385-270-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-18 385-270-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-18 385-270-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-18 385-270-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-18 385-270-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-07-17 385-270-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2018-07-09 385-337-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2018-07-09 385-337-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2018-07-02 385-273-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2018-07-02 385-273-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2018-06-28 385-337-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2018-06-22 385-270-0XXX 0000–0999Assigned ADVANCED TELECOM SOLUTIONS, LLC 181J SALT LAKE UT
2018-06-21 385-501-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-21 385-501-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-15 385-955-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-15 385-955-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2018-06-12 385-447-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2018-06-12 385-666-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2018-06-11 385-955-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2018-06-11 385-955-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2018-06-11 385-955-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2018-06-11 385-955-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2018-06-11 385-955-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2018-06-08 385-492-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2018-05-22 385-367-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
2018-05-22 385-367-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
2018-05-22 385-367-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
2018-05-09 385-955-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-09 385-955-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-09 385-955-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2018-05-01 385-337-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2018-05-01 385-787-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2018-05-01 385-867-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-05-01 385-867-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-05-01 385-867-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-05-01 385-867-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2018-05-01 385-867-7XXX 7000–7999Assigned 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.