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
2021-05-20 385-416-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-05-20 385-416-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-05-19 385-346-0XXX 0000–0999Assigned TELNYX LLC 073H MIDVALE UT
2021-05-19 385-370-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-05-19 385-370-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-05-19 385-370-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-05-19 385-370-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-05-19 385-370-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-05-19 385-396-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D MURRAY UT
2021-05-19 385-396-3XXX 3000–3999Assigned VONAGE AMERICA LLC 197D MURRAY UT
2021-05-19 385-418-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-418-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-418-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-487-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-487-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-487-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-19 385-487-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-05-17 385-402-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D BOUNTIFUL UT
2021-05-07 385-384-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-392-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-392-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-392-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-866-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-866-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-866-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-866-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-05-07 385-866-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 PROVO UT
2021-04-30 385-392-1XXX 1000–1999Assigned IP HORIZON LLC 515J PROVO UT
2021-04-27 385-378-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MURRAY UT
2021-04-23 385-487-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2021-04-23 385-487-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H SALT LAKE UT
2021-04-21 385-379-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-379-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-379-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-418-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-418-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-418-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-487-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-487-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-487-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-501-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-501-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-799-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-910-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-910-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-21 385-910-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-04-19 385-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J OGDEN UT
2021-04-19 385-910-0XXX 0000–0999Assigned ONVOY, LLC - UT 871E SALT LAKE UT
2021-04-17 385-524-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE 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.