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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-11-08 385-443-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 SALT LAKE UT
2021-11-03 385-446-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-03 385-446-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F ALTA UT
2021-11-01 385-426-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CLEARFIELD UT
2021-10-27 385-403-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2021-10-27 385-403-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F FARMINGTON UT
2021-10-27 385-766-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ALTA UT
2021-10-27 385-766-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ALTA UT
2021-10-26 385-426-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-426-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-426-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-426-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-426-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - UT 117F CLEARFIELD UT
2021-10-26 385-443-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-26 385-451-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-10-26 385-451-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-10-26 385-451-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-10-25 385-392-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-10-25 385-392-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-10-25 385-392-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-10-25 385-392-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-10-25 385-392-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-10-25 385-417-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H AMERCNFORK UT
2021-10-25 385-417-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H AMERCNFORK UT
2021-10-25 385-436-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-25 385-436-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-10-21 385-789-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H LEHI UT
2021-10-21 385-789-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LEHI UT
2021-10-20 385-402-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H BOUNTIFUL UT
2021-10-18 385-430-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-10-18 385-430-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-10-18 385-430-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-10-18 385-430-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CLEARFIELD UT
2021-10-15 385-488-0XXX 0000–0999Assigned TELNYX LLC 073H MIDVALE UT
2021-10-15 385-488-1XXX 1000–1999Assigned TELNYX LLC 073H MIDVALE 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.