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 574
CENTURYLINK COMMUNICATIONS, LLC 41
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
2014-07-09 574-701-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GALVESTON IN
2014-06-26 574-857-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FULTON IN
2014-06-25 574-382-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MACY IN
2014-06-25 574-598-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AKRON IN
2014-06-25 574-626-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALTON IN
2014-06-25 574-643-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROYAL CTR IN
2014-06-25 574-889-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LUCERNE IN
2014-05-16 574-566-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLAYPOOL IN
2014-04-02 574-725-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOGANSPORT IN
2014-03-25 574-207-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KNOX IN
2014-03-25 574-279-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WALKERTON IN
2014-03-25 574-285-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NAPPANEE IN
2014-03-25 574-313-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FLORA IN
2014-03-25 574-329-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OSCEOLA IN
2014-03-25 574-635-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CULVER IN
2014-03-25 574-678-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILFORD IN
2014-03-25 574-808-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTICELLO IN
2014-03-25 574-891-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DUNLAP IN
2014-03-24 574-200-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINAMAC IN
2014-03-24 574-212-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTEREY IN
2014-03-24 574-227-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILLWOOD IN
2014-03-24 574-241-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NO JUDSON IN
2014-03-24 574-248-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BREMEN IN
2014-03-24 574-330-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MILLERSBG IN
2014-03-24 574-358-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDDLEBURY IN
2014-03-24 574-364-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GOSHEN IN
2014-03-24 574-526-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEESBURG IN
2014-03-24 574-633-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WYATT IN
2014-03-24 574-797-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NEWCARLISL IN
2014-03-24 574-862-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WAKARUSA IN
2014-03-21 574-203-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAPAZ IN
2014-03-21 574-228-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BURNETTSVL IN
2014-03-21 574-244-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NO WEBSTER IN
2014-03-21 574-275-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SYRACUSE IN
2014-03-21 574-281-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARGOS IN
2014-03-21 574-328-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BURKET IN
2014-03-21 574-376-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WARSAW IN
2014-03-21 574-380-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ATWOOD IN
2013-12-17 574-327-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ELKHART IN
2013-12-17 574-401-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SOUTH BEND IN
2013-11-15 574-704-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PLYMOUTH IN

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.