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 385
CENTURYLINK COMMUNICATIONS, LLC 29
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
2022-10-14 385-622-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2020-07-09 385-346-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2019-11-05 385-342-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2019-11-05 385-342-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2019-03-12 385-425-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MURRAY UT
2018-11-06 385-295-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2018-11-06 385-295-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2018-09-07 385-300-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BOUNTIFUL UT
2018-07-24 385-337-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2018-01-30 385-278-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KAYSVILLE UT
2017-12-28 385-465-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2017-12-28 385-465-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2017-12-20 385-522-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE UT
2017-04-11 385-497-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PROVO UT
2017-03-28 385-264-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OGDEN UT
2017-03-28 385-278-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KAYSVILLE UT
2017-03-28 385-484-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEHI UT
2017-03-02 385-448-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPANIHFORK UT
2017-03-01 385-331-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AMERCNFORK UT
2017-03-01 385-350-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MORGAN UT
2017-03-01 385-388-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MURRAY UT
2017-03-01 385-423-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLEARFIELD UT
2017-03-01 385-434-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDVALE UT
2017-03-01 385-440-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLEASATGRV UT
2017-03-01 385-449-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALTA UT
2017-03-01 385-489-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BOUNTIFUL UT
2017-03-01 385-895-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PAYSON UT
2017-03-01 385-988-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FARMINGTON UT
2016-11-28 385-261-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALT LAKE 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.