`mail.duikan.com`

	DNSSEC	⚠️ Not signed
	A	218.240.31.68^{🇨🇳 CHINANET-BJ-METRO218.240.0.0/19 China Telecom Beijing Co. Ltd.}

`duikan.com`

	DNSSEC	⚠️ Not signed
	A	117.28.254.45^{🇨🇳 harry-ASN117.28.224.0/19 PACNET (proxy-registered route object)}
	NS	`ns1.cnolnic.com` ⭐
	NS	`ns2.cnolnic.com`
	MX	`mail.duikan.com` ⭐
	SOA	`ns1.cnolnic.com`root@cnolnic.net 2006-11-24 #1

MX for

duikan.com

Same first word

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DNS History

1 record (1 active, 0 former)

●A218.240.31.682015-07-21 → 2026-05-11 · 2 obs

● 2015-07-21 00:15:20
● 2026-05-11 15:32:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
duikan.com	ns1.cnolnic.com, ns2.cnolnic.com	6 records

✅ Authoritative Response

Server:106.12.41.178

NS records: ns1.cnolnic.com, ns2.cnolnic.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for duikan.com (unsigned zone)

⏱️ Timing

Total: 3582ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`218.240.31.68`

📌 Glue Records Collected

Total: 6

Out-of-bailiwick: 6 (ns1.cnolnic.com, ns1.cnolnic.com, ns1.cnolnic.com...)

Analysis

Mail Server Role

mail.duikan.com functions as a mail server for duikan.com.

IP Addresses

mail.duikan.com resolves to one IP number: 218.240.31.68.

Other host names, for instance mail.chinaztjx.com, mail.cdlpw.cn, mail.oetro.cn and mail.jfsun.com share IP numbers with mail.duikan.com.

mail.duikan.com - robtex.com

mail.duikan.com

duikan.com