NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 725
LEVEL 3 COMMUNICATIONS, LLC - NV 31
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
2024-04-25 725-332-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2023-11-07 725-316-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2023-09-19 725-313-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 INDIAN SPG NV
2023-09-12 725-550-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 MTCHARLETN NV
2022-10-04 725-745-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 MTCHARLETN NV
2022-04-06 725-281-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2022-03-22 725-281-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2022-01-27 725-272-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-11-05 725-269-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-07-27 725-254-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-07-07 725-250-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-05-19 725-248-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-03-24 725-277-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-03-11 725-245-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 NELSON NV
2021-03-02 725-373-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2021-02-12 725-755-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 JEAN NV
2020-11-06 725-977-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 SEARCHLIHT NV
2020-04-15 725-231-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2020-03-25 725-229-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2020-03-25 725-229-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2020-01-28 725-735-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-12-26 725-710-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-11-27 725-228-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-10-09 725-228-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-08-20 725-216-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-04-17 725-218-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2019-02-20 725-208-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAUGHLIN NV
2019-01-31 725-204-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2018-10-10 725-726-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2018-08-22 725-206-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV
2014-07-09 725-666-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NV 4805 LAS VEGAS NV

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.