`mail.gap-system.org`

CNAME	`wta-web.rhrk.uni-kl.de`
DNSSEC	⚠️ Not signed
A	2001:638:208:ef61:0:ff:fe00:2^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
		PTR	`wta-web.rhrk.uni-kl.de`
A	131.246.120.130^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
MX	`mailgate2.uni-kl.de` ⭐
		A	2001:638:208:120::209^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
		A	131.246.120.209^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
			PTR	`mailgate2.uni-kl.de`
MX	`mailgate1.uni-kl.de`⁽¹⁰⁾
		A	2001:638:208:120::208^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
			PTR	`mailgate1.uni-kl.de`
		A	131.246.120.208^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
			PTR	`mailgate1.uni-kl.de`

`gap-system.org`

	DNSSEC	⚠️ Not signed
	A	2001:638:208:ef61:0:ff:fe00:2^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
	A	131.246.120.130^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
	NS	`ns1.rptu.de` ⭐
	NS	`ns2.rptu.de`
	MX	`mailgate2.uni-kl.de` ⭐
	MX	`mailgate1.uni-kl.de`⁽¹⁰⁾
	TXT	`v=spf1 redirect=_spf.uni-kl.de`
	SOA	`ns1.rptu.de`hostmaster@uni-kl.de 2026-02-09 #84

WOT: SAFE (60/100)
rank #163116 globally
rank #11476 in the tld
WOT: SAFE (87/100)
📈 Tranco rank: #439,935

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DNS History

2 records (1 active, 1 former)

○A138.251.21.1362018-05-29 → 2018-05-29 · 2 obs

● 2018-05-29 00:33:00
○ 2026-03-27 12:37:32

●CNAMEwta-web.rhrk.uni-kl.de2026-03-27 → 2026-03-27 · 1 obs

● 2026-03-27 12:37:32

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org	-
gap-system.org	ns1.rptu.de, ns2.rptu.de	-

✅ Authoritative Response

Server:131.246.9.117

NS records: ns1.rptu.de, ns2.rptu.de

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for gap-system.org (unsigned zone)

⏱️ Timing

Total: 760ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`wta-web.rhrk.uni-kl.de`

Analysis

IP Addresses

mail.gap-system.org resolves to two IP numbers: 2001:638:208:ef61:0:ff:fe00:2 and 131.246.120.130.

Other host names, for instance ub.rptu.de, lautarium.de, hochschulsport.uni-kl.de, imove-kl.de and tuk.info share IP numbers with mail.gap-system.org.

Mail Servers

mail.gap-system.org is served by two mail servers: mailgate1.uni-kl.de and mailgate2.uni-kl.de.

mail.gap-system.org shares the mail server setup with other domains, for example ageing-smart.de, itwm.de, datacenter-search-scan-ipv4-0248.rhrk.uni-kl.de, imove-kl.de and ivw.uni-kl.de.

mail.gap-system.org shares some mail servers with other domains, at least partially; for instance bliemel.de, mail1.uni-kl.de, bau47-zv-workstations-ipv4-0016.verw.uni-kl.de, bau32-rhrk-ipv4-0006.rz.rptu.de and it-ipv4-0003.wiwi.uni-kl.de.

Host names with two IP numbers:

mailgate1.uni-kl.de points to: 2001:638:208:120::208 and 131.246.120.208; mailgate2.uni-kl.de points to: 2001:638:208:120::209 and 131.246.120.209.

mail.gap-system.org - robtex.com