NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

16 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2022-07-20 385-865-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2022-07-20 385-865-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2022-07-20 385-865-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2022-07-20 385-865-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2022-07-18 385-746-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2022-07-18 385-746-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2022-07-18 385-746-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F LEHI UT
2022-07-14 385-410-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MORGAN UT
2022-07-12 385-406-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E SPANIHFORK UT
2022-07-08 385-403-8XXX 8000–8999Assigned ONVOY, LLC - UT 871E FARMINGTON UT
2022-07-05 385-481-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-07-05 385-481-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2022-07-05 385-563-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2022-06-28 385-464-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-464-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-464-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-464-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-464-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-464-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F MIDVALE UT
2022-06-28 385-732-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F OGDEN UT
2022-06-17 385-566-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-566-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-17 385-786-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2022-06-15 385-563-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2022-06-15 385-563-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2022-06-15 385-563-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2022-06-15 385-563-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2022-06-15 385-563-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SALT LAKE UT
2022-06-14 385-563-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 SALT LAKE UT
2022-06-03 385-832-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AMERCNFORK UT
2022-06-03 385-832-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J AMERCNFORK UT
2022-06-03 385-837-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2022-06-03 385-865-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J OGDEN UT
2022-06-03 385-899-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J PAYSON UT
2022-05-19 385-415-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2022-05-18 385-406-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SPANIHFORK UT
2022-05-13 385-461-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-13 385-461-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2022-05-12 385-464-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MIDVALE UT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.