WWW.ROBTEX.COM - challenge-21c.com
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challenge-21c.com checked at 2025-11-25T10:09:11.383Z 254ms 213/213/213 100% R:12 allDone:true timedOut:false challenge-21c.com
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Starts with same word
challenge-21c.co.jp |
challenge-21c.com |
Starts similarily
challenge-21c.co.jp |
challenge-21c.com |
AI analysis
challenge-21c.com is a parent of mail.challenge-21c.com and pop.challenge-21c.com.
challenge-21c.com is delegated to two name servers vip3.alidns.com and vip4.alidns.com.
challenge-21c.com shares the same name server setup as other domains, for instance tapsvc.com, uodoo.cn, haowujidian.com, unicompayment.com and ztn.com.
challenge-21c.com at least partially shares name servers with other domains, for instance wxianlai.com, tripcdn.cn, huya.info, xylrs.com and tedu.cn.
These name servers are commonly used alongside ns1.huyatvns.com and ns2.huyatvns.com.
Seven IP numbers per host name:
vip3.alidns.com points to: 2408:4009:500::3, 8.212.93.3, 140.205.1.5, 170.33.32.210, 170.33.40.136, 170.33.73.26 and 170.33.80.10
vip4.alidns.com points to: 2408:4009:500::4, 8.212.93.4, 140.205.1.6, 170.33.32.211, 170.33.40.137, 170.33.73.27 and 170.33.80.11
Two mail servers handle challenge-21c.com: mxbiz1.qq.com and mxbiz2.qq.com.
challenge-21c.com shares the same mail server setup as other domains, for instance ccer.pku.edu.cn, jgshome.com, qutj.com, bjtdty.com and gamebrain.io.
challenge-21c.com shares at least partially some mail servers with other domains, including happytoon.cn, meinaide.com and fgloka.com.
Host names with two IP numbers:
The host name mxbiz1.qq.com points to 103.86.78.2 and 103.86.78.3; the host name mxbiz2.qq.com points to 43.154.252.16 and 43.154.252.202.