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
2016-02-19 385-477-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2016-02-19 385-895-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON UT
2016-02-18 385-331-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2016-02-18 385-331-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E AMERCNFORK UT
2016-02-18 385-388-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E MURRAY UT
2016-02-18 385-388-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MURRAY UT
2016-02-18 385-557-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2016-02-18 385-557-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E MIDVALE UT
2016-02-18 385-707-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2016-02-17 385-707-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2016-02-17 385-988-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2016-02-17 385-988-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2016-02-12 385-323-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2016-02-12 385-323-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2016-02-12 385-383-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E CLEARFIELD UT
2016-02-12 385-685-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SPRINGVL UT
2016-02-12 385-685-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E SPRINGVL UT
2016-02-10 385-350-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MORGAN UT
2016-02-10 385-350-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E MORGAN UT
2016-02-10 385-895-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PAYSON UT
2016-02-10 385-895-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E PAYSON UT
2016-02-09 385-262-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E KAYSVILLE UT
2016-02-09 385-262-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E KAYSVILLE UT
2016-02-09 385-389-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E OGDEN UT
2016-02-09 385-389-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E OGDEN UT
2016-02-08 385-707-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-02-08 385-707-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-02-08 385-707-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-02-03 385-257-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E MURRAY UT
2016-02-03 385-257-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E MURRAY UT
2016-02-03 385-557-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2016-01-28 385-331-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AMERCNFORK UT
2016-01-26 385-243-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOUNTIFUL UT
2016-01-26 385-448-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPANIHFORK UT
2016-01-26 385-455-2XXX 2000–2999Assigned QWEST CORPORATION 9636 LEHI UT
2016-01-26 385-707-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SALT LAKE UT
2016-01-15 385-263-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-15 385-263-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E ALTA UT
2016-01-11 385-389-0XXX 0000–0999Assigned METROPCS, INC. 5562 OGDEN UT
2016-01-11 385-557-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MIDVALE UT
2016-01-11 385-630-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-01-11 385-630-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-01-11 385-630-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-01-11 385-630-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-01-11 385-630-5XXX 5000–5999Assigned 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.