`grid-security.com`

DNSSEC	⚠️ Not signed
NS	`robin.dfn-cert.de` ⭐
		A	193.174.13.65^{🇩🇪 DFN193.174.0.0/15 -AGG-1}
			PTR	`robin.dfn-cert.de`
NS	`ns.work.de`
		A	2a00:ea8:200::35^{🇩🇪 WORK-AS2a00:ea8::/32 n@work Internet Informationssysteme GmbH}
			PTR	`ns.work.de`
		A	212.12.32.174^{🇩🇪 WORK-AS212.12.32.0/20 n@work Internet Informationssysteme GmbH}
			PTR	`ns.work.de`
MX	`mail1.dfn-cert.de` ⭐
		A	2001:638:714:2811:5::1^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
			PTR	`mail1.dfn-cert.de`
		A	193.174.13.200^{🇩🇪 DFN193.174.0.0/15 -AGG-1}
			PTR	`mail1.dfn-cert.de`
MX	`mail2.dfn-cert.de` ⭐
		A	2001:638:714:2811:5::2^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
			PTR	`mail2.dfn-cert.de`
		A	193.174.13.207^{🇩🇪 DFN193.174.0.0/15 -AGG-1}
			PTR	`mail2.dfn-cert.de`
SOA	`robin.dfn-cert.de`hostmaster@dfn-cert.de 2022-05-13 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774473247

Same first word

grid-security.net

grid-security.com

DNS History

5 records (4 active, 1 former)

●NSns.work.de2015-05-02 → 2026-03-25 · 2 obs

● 2015-05-02 15:44:44
● 2026-03-25 21:14:56

●NSrobin.dfn-cert.de2015-05-02 → 2026-03-25 · 2 obs

● 2015-05-02 15:44:44
● 2026-03-25 21:14:56

●MXmail1.dfn-cert.de2015-05-02 → 2026-03-25 · 2 obs

● 2015-05-02 15:44:44
● 2026-03-25 21:14:56

●MXmail2.dfn-cert.de2016-12-25 → 2026-03-25 · 3 obs

○ 2016-04-03 20:07:22
● 2016-12-25 07:50:28
● 2026-03-25 21:14:56

○MXsam.dfn-cert.de2015-05-02 → 2016-04-03 · 4 obs

● 2015-05-02 15:44:44
● 2016-04-03 20:07:22
○ 2016-12-25 07:50:28
○ 2026-03-25 21:14:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, d.gtld-servers.net, e.gtld-servers.net, h.gtld-servers.net...	-
grid-security.com	ns.work.de, robin.dfn-cert.de	-

✅ Authoritative Response

Server:212.12.32.174

NS records: ns.work.de, robin.dfn-cert.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for grid-security.com (unsigned zone)

⏱️ Timing

Total: 674ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`robin.dfn-cert.de, ns.work.de`
MX	2	`mail2.dfn-cert.de (pri: 50), mail1.dfn-cert.de (pri: 50)`
SOA	1	`robin.dfn-cert.de hostmaster.dfn-cert.de`

Analysis

Name Servers

grid-security.com's delegation uses two name servers, robin.dfn-cert.de and ns.work.de.

grid-security.com shares the same name server setup as other domains, for instance grid-security.net.

grid-security.com at least partially shares name servers with other domains, including gratis-gutscheine.de, beteiligungsmakler.de, crow.38.12.212.in-addr.arpa, gelbeseiten-heimfeld.com and ottooffice.eu.

These name servers are often used together with hulk.work.de, ns.duf.de, deneb.dfn.de, rzdspc1.informatik.uni-hamburg.de, dns1.rrz.uni-hamburg.de, dns2.rrz.uni-hamburg.de, dns-1.dfn.de, dns-2.dfn.de and dns-3.dfn.de.

Hosts with two IPs:

ns.work.de points to 2a00:ea8:200::35 and 212.12.32.174.

Hosts with one IP:

robin.dfn-cert.de points to 193.174.13.65.

Mail Servers

grid-security.com is handled by two mail servers: mail1.dfn-cert.de and mail2.dfn-cert.de.

grid-security.com shares its mail server setup with other domains, including cdp.pca.dfn.de, portal.cert.dfn.de, ra.pca.dfn.de, acdc-project.eu and ocsp.pca.dfn.de.

grid-security.com shares at least partially some mail servers with other domains, for instance carmentes.org, carmentis.org and carmentes.de.

Host names with two IPs:

mail1.dfn-cert.de points to: 2001:638:714:2811:5::1 and 193.174.13.200

mail2.dfn-cert.de points to: 2001:638:714:2811:5::2 and 193.174.13.207

grid-security.com - robtex.com