`computeralgebra.org`

DNSSEC	⚠️ Not signed
NS	`ns1.rptu.de` ⭐
		A	2a03:63c0::53:1001^{🇩🇪 UNIKL2a03:63c0::/32 -V6-1}
			PTR	`ns1.rptu.de`
		A	131.246.9.117^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
			PTR	`ns1.rptu.de`
NS	`ns2.rptu.de`
		A	2a03:63c0::53:1002^{🇩🇪 UNIKL2a03:63c0::/32 -V6-1}
			PTR	`ns2.rptu.de`
		A	131.246.1.117^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
			PTR	`ns2.rptu.de`
MX	`mailgate2.uni-kl.de` ⭐
		A	2001:638:208:120::209^{🇩🇪 DFN2001:638::/32 -V6-AGG1}
			PTR	`mailgate2.uni-kl.de`
		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}
		A	131.246.120.208^{🇩🇪 UNIKL131.246.0.0/16 RHRK-LAN}
			PTR	`mailgate1.uni-kl.de`
SOA	`ns1.rptu.de`hostmaster@uni-kl.de 2024-11-15 #54

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐
	NS	`a2.org.afilias-nst.info`
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info`
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1774646990

Same first word

computeralgebra.org

DNS History

6 records (4 active, 2 former)

○NSminnehaha.rhrk.uni-kl.de2015-07-20 → 2020-01-11 · 4 obs

● 2015-07-20 08:44:38
● 2020-01-11 06:41:46
○ 2026-03-23 22:33:50
○ 2026-03-27 22:01:10

○NSminnetonka.rhrk.uni-kl.de2015-07-20 → 2020-01-11 · 4 obs

● 2015-07-20 08:44:38
● 2020-01-11 06:41:46
○ 2026-03-23 22:33:50
○ 2026-03-27 22:01:10

●NSns1.rptu.de2026-03-23 → 2026-03-27 · 3 obs

○ 2020-01-11 06:41:46
● 2026-03-23 22:33:50
● 2026-03-27 22:01:10

●NSns2.rptu.de2026-03-23 → 2026-03-27 · 3 obs

○ 2020-01-11 06:41:46
● 2026-03-23 22:33:50
● 2026-03-27 22:01:10

●MXmailgate1.uni-kl.de2015-07-20 → 2026-03-27 · 2 obs

● 2015-07-20 08:44:38
● 2026-03-27 22:01:10

●MXmailgate2.uni-kl.de2015-07-20 → 2026-03-27 · 2 obs

● 2015-07-20 08:44:38
● 2026-03-27 22:01:10

🔍 DNS Trace

📋 Delegation Chain

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

✅ Authoritative Response

Server:131.246.9.117

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for computeralgebra.org (unsigned zone)

⏱️ Timing

Total: 1471ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.rptu.de, ns2.rptu.de`
MX	2	`mailgate1.uni-kl.de (pri: 10), mailgate2.uni-kl.de (pri: 5)`
SOA	1	`ns1.rptu.de hostmaster.uni-kl.de`

Analysis

Name Servers

Two name servers ns1.rptu.de and ns2.rptu.de are delegated to computeralgebra.org.

computeralgebra.org uses the same name server configuration as other domains, such as iasb-hsb.org, thefutureiscomposite.com, gap-system.org, willkommenimbusch.de and emecs.eu.

computeralgebra.org at least partially shares name servers with other domains such as 167.68.192.in-addr.arpa, zit-rlp.de, zfh.de, 165.68.192.in-addr.arpa and itwm.fhg.de.

These name servers are often used together with dns1.belwue.de, dns-3.dfn.de, dns-1.dfn.de, ns1.fraunhofer.de, ns2.fraunhofer.de, ns3.fraunhofer.de, nserver1.hs-koblenz.de, nserver2.hs-koblenz.de and elfenkauz.zit.uni-kl.de.

Host names with two IPs:

ns1.rptu.de points to 2a03:63c0::53:1001 and 131.246.9.117.

ns2.rptu.de points to 2a03:63c0::53:1002 and 131.246.1.117.

Mail Servers

Two mail servers handle computeralgebra.org: mailgate1.uni-kl.de and mailgate2.uni-kl.de.

computeralgebra.org shares the same mail server setup as other domains, including nocacct.rhrk.uni-kl.de, vpn-ipv4-1011.triple-a.uni-kl.de, ru.uni-kl.de, alcatraz035.wohnheim.uni-kl.de and dfki-1027.dfki.uni-kl.de.

computeralgebra.org shares mail servers with other domains at least in part, for instance bliemel.de, datacenter-web-hosting-ipv4-0111.rhrk.uni-kl.de, bau76-rest-ipv4-0045.physik.uni-kl.de, rotes190.wohnheim.uni-kl.de and gap-system.org.

Host names with two IPs:

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.

computeralgebra.org - robtex.com