NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 317
CENTURYLINK COMMUNICATIONS, LLC 30
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
2018-12-12 317-740-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARMEL IN
2017-02-23 317-343-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARMEL IN
2016-06-22 317-746-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDIANAPLS IN
2016-03-21 317-794-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDIANAPLS IN
2014-06-30 317-763-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WESTFIELD IN
2014-06-19 317-878-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRAFALGAR IN
2014-06-16 317-978-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHARLOTSVL IN
2014-05-30 317-350-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROWNSBURG IN
2014-05-30 317-360-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENWOOD IN
2014-05-30 317-434-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CUMBERLAND IN
2014-05-30 317-483-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MOORESVL IN
2014-05-30 317-572-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FISHERS IN
2014-05-30 317-593-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ACTON IN
2014-05-30 317-597-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OAKLANDON IN
2014-05-30 317-606-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CICERO IN
2014-05-30 317-623-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEWPALSTIN IN
2014-05-30 317-649-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GREENFIELD IN
2014-05-30 317-668-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FRANKLIN IN
2014-05-30 317-718-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DANVILLE IN
2014-05-30 317-720-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAIRLAND IN
2014-05-30 317-747-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FORTVILLE IN
2014-05-30 317-900-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NOBLESVL IN
2014-05-30 317-933-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NINEVEH IN
2014-05-29 317-561-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLAINFIELD IN
2014-05-29 317-604-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHELBYVL IN
2014-05-29 317-647-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHERIDAN IN
2014-05-29 317-830-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WESTNEWTON IN
2014-05-29 317-942-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ZIONSVILLE IN
2014-04-02 317-975-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARMEL IN
2014-03-14 317-991-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J INDIANAPLS IN

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.