`mail.crystallinus.com`

DNSSEC	⚠️ Not signed
A	188.68.47.110^{🇩🇪 netcup-AS188.68.47.0/24}
		PTR	`mx2f6e.netcup.net`

`crystallinus.com`

	DNSSEC	⚠️ Not signed
	A	2a03:4000:30:3d98::11:5848^{🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH}
	A	188.68.47.108^{🇩🇪 netcup-AS188.68.47.0/24}
	NS	`root-dns.netcup.net` ⭐
	NS	`second-dns.netcup.net`
	NS	`third-dns.netcup.net`
	MX	`mail.crystallinus.com` ⭐
	MX	`mx2f6e.netcup.net`⁽⁵⁰⁾
	TXT	`v=spf1 mx a include:_spf.webhosting.systems ~all`
	SOA	`root-dns.netcup.net`dnsadmin@netcup.net 2019-12-23 #1

MX for

crystallinus.com

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DNS History

1 record (1 active, 0 former)

●A188.68.47.1102026-03-08 → 2026-04-25 · 2 obs

● 2026-03-08 02:12:06
● 2026-04-25 06:36:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
crystallinus.com	root-dns.netcup.net, second-dns.netcup.net, third-dns.netcup.net	-

✅ Authoritative Response

Server:188.68.63.68

NS records: root-dns.netcup.net, second-dns.netcup.net, third-dns.netcup.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for crystallinus.com (unsigned zone)

⏱️ Timing

Total: 730ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`188.68.47.110`

Analysis

Mail Server Role

mail.crystallinus.com serves as the mail server for crystallinus.com.

mx2f6e.netcup.net is commonly used as a mail server with mail.crystallinus.com.

IP Addresses

mail.crystallinus.com resolves to a single IP address: 188.68.47.110.

Other host names including mail.mm3tools.com, mail.diepuppenspielerin.de, mail.1a-immo.com, mail.ithassler.de and mail.himpler.eu share IP numbers with mail.crystallinus.com.

mail.crystallinus.com - robtex.com