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
2015-07-29 385-368-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-368-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-368-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-368-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-368-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-368-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2015-07-29 385-448-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2015-07-29 385-448-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2015-07-28 385-448-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2015-07-28 385-448-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F SPANIHFORK UT
2015-07-23 385-900-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MIDVALE UT
2015-07-08 385-368-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2015-07-08 385-535-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-07-08 385-535-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-07-06 385-249-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-249-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-881-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-881-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-881-5XXX 5000–5999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-881-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-06 385-881-9XXX 9000–9999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-07-01 385-352-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2015-07-01 385-352-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 LEHI UT
2015-07-01 385-404-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PAYSON UT
2015-07-01 385-685-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPRINGVL UT
2015-06-26 385-243-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOUNTIFUL UT
2015-06-26 385-243-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOUNTIFUL UT
2015-06-26 385-347-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2015-06-26 385-347-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2015-06-26 385-347-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2015-06-19 385-298-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2015-06-19 385-298-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OGDEN UT
2015-06-19 385-352-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LEHI UT
2015-06-19 385-529-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2015-06-19 385-529-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2015-06-19 385-529-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2015-06-19 385-529-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT
2015-06-18 385-881-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2015-06-16 385-248-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-06-16 385-248-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-06-16 385-248-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-06-16 385-350-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 MORGAN UT
2015-06-16 385-625-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-06-16 385-625-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2015-06-16 385-881-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2015-06-11 385-249-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7176 SALT LAKE UT
2015-06-08 385-519-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 CLEARFIELD UT
2015-06-02 385-405-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2015-06-01 385-449-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2015-05-21 385-368-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE 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.