`mail.worldoor.com`

	DNSSEC	⚠️ Not signed
	A	218.5.79.192^{🇨🇳 CHINATELECOM-Fujian-Xiamen-IDC1218.5.72.0/21 厦门}

`worldoor.com`

	DNSSEC	⚠️ Not signed
	NS	`ns1.cnolnic.com` ⭐
	NS	`ns2.cnolnic.com`
	MX	`mail.worldoor.com` ⭐
	SOA	`ns1.cnolnic.com`root@cnolnic.net 2006-11-24 #1

MX for

worldoor.com

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DNS History

1 record (1 active, 0 former)

●A218.5.79.1922015-06-03 → 2026-04-12 · 2 obs

● 2015-06-03 03:56:46
● 2026-04-12 23:59:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
worldoor.com	ns1.cnolnic.com, ns2.cnolnic.com	6 records

✅ Authoritative Response

Server:240c:4082:0:5d01::5

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for worldoor.com (unsigned zone)

⏱️ Timing

Total: 2468ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`218.5.79.192`

📌 Glue Records Collected

Total: 6

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

Analysis

Mail Server Role

mail.worldoor.com serves as a mail server for worldoor.com.

IP Addresses

mail.worldoor.com resolves to one IP number: 218.5.79.192.

Other host names, for example mail.ax-art.cn, share IP numbers with mail.worldoor.com.

mail.worldoor.com - robtex.com