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
2021-04-17 385-524-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-524-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-17 385-842-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 KAYSVILLE UT
2021-04-13 385-370-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-13 385-370-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-13 385-376-1XXX 1000–1999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2021-04-13 385-376-2XXX 2000–2999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2021-04-13 385-376-3XXX 3000–3999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2021-04-13 385-376-4XXX 4000–4999Assigned ONVOY, LLC - UT 871E PLEASATGRV UT
2021-04-13 385-384-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-13 385-384-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-12 385-307-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-12 385-364-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-12 385-380-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-12 385-400-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-12 385-400-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-12 385-400-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 OGDEN UT
2021-04-12 385-483-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-12 385-483-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PROVO UT
2021-04-08 385-866-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J PROVO UT
2021-04-05 385-391-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-04-05 385-391-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-04-05 385-391-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-04-05 385-391-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-04-05 385-391-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 KAYSVILLE UT
2021-04-05 385-438-9XXX 9000–9999Assigned PEERLESS NETWORK OF UTAH, LLC - UT 526H PAYSON UT
2021-03-23 385-361-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - UT 3231 MIDVALE UT
2021-03-22 385-378-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2021-03-22 385-378-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MURRAY UT
2021-03-22 385-418-1XXX 1000–1999Assigned STRATUS NETWORKS 495J SALT LAKE UT
2021-03-17 385-766-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - UT 6571 ALTA UT
2021-03-16 385-524-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J KAYSVILLE UT
2021-03-11 385-371-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SALT LAKE UT
2021-03-11 385-371-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SALT LAKE 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.