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
2016-09-06 385-262-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2016-08-23 385-251-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2016-08-23 385-251-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2016-08-23 385-251-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2016-08-22 385-440-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2016-08-22 385-440-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2016-08-18 385-685-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SPRINGVL UT
2016-08-17 385-248-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2016-08-17 385-254-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2016-08-17 385-254-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2016-08-17 385-482-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2016-08-17 385-482-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2016-08-16 385-988-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2016-08-16 385-988-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2016-08-11 385-256-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-256-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-256-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-256-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-267-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-267-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-11 385-267-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-08-04 385-289-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2016-08-03 385-254-0XXX 0000–0999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PROVO UT
2016-08-03 385-256-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2016-08-03 385-267-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-08-03 385-267-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-08-03 385-267-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2016-07-29 385-289-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2016-07-29 385-289-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2016-07-27 385-267-2XXX 2000–2999Assigned METROPCS, INC. 5562 SALT LAKE UT
2016-07-27 385-267-3XXX 3000–3999Assigned METROPCS, INC. 5562 SALT LAKE UT
2016-07-27 385-267-4XXX 4000–4999Assigned METROPCS, INC. 5562 SALT LAKE UT
2016-07-26 385-267-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SALT LAKE UT
2016-07-26 385-482-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2016-07-26 385-482-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2016-07-26 385-482-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F PROVO UT
2016-07-25 385-253-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2016-07-22 385-388-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2016-07-19 385-254-6XXX 6000–6999Assigned ONVOY, LLC - UT 871E PROVO UT
2016-07-19 385-254-7XXX 7000–7999Assigned ONVOY, LLC - UT 871E PROVO UT
2016-07-19 385-256-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2016-07-19 385-256-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SALT LAKE UT
2016-07-19 385-257-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MURRAY UT
2016-07-14 385-388-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2016-07-08 385-268-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2016-07-08 385-268-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2016-07-08 385-298-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2016-07-08 385-298-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2016-06-30 385-441-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2016-06-30 385-441-1XXX 1000–1999Assigned 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.