co3learn.de - robtex.com
co3learn.de
de
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | f.nic.de ⭐ | ||||||
| NS | a.nic.de | ||||||
| NS | l.de.net ⚠️ Not in parent delegation | ||||||
| NS | n.de.net ⚠️ Not in parent delegation | ||||||
| NS | s.de.net ⚠️ Not in parent delegation | ||||||
| NS | z.nic.de | ||||||
| SOA | f.nic.dedns-operations@denic.de serial=1774517444 | ||||||
PTR for
Same first word
co3learn.de |
DNS History
7 records (7 active, 0 former)
●MXa1234.mx.srv.dfn.de2026-03-12 → 2026-03-26 · 2 obs
● 2026-03-26 09:39:08
●MXb1234.mx.srv.dfn.de2026-03-12 → 2026-03-26 · 2 obs
● 2026-03-26 09:39:08
●MXc1234.mx.srv.dfn.de2026-03-12 → 2026-03-26 · 2 obs
● 2026-03-26 09:39:08
●A134.76.9.142026-03-12 → 2026-03-26 · 2 obs
● 2026-03-26 09:39:08
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| co3learn.de | dns1.gwdg.de, dns3.gwdg.de, dns2.gwdg.de | 5 records |
✅ Authoritative Response
Server:134.76.33.42
NS records: dns1.gwdg.de, dns3.gwdg.de, dns2.gwdg.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for co3learn.de (unsigned zone)
⏱️ Timing
Total: 687ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 134.76.9.14 |
| NS | 3 | dns3.gwdg.de, dns2.gwdg.de... |
| MX | 3 | c1234.mx.srv.dfn.de (pri: 50), b1234.mx.srv.dfn.de (pri: 50)... |
| TXT | 1 | v=spf1 mx include:spf.gwdg.de ~all |
| SOA | 1 | dns1.gwdg.de hostmaster.gwdg.de |
📌 Glue Records Collected
Total: 5
Out-of-bailiwick: 5 (dns3.gwdg.de, dns2.gwdg.de, dns1.gwdg.de...)
Analysis
IP Addresses
co3learn.de resolves to a single IP: 134.76.9.14.
Other host names, for instance gutenbergdigital.de, xlab-stiftung.de, studium-in-goettingen.de, ifdem.de and open-forecast.eu share IP numbers with co3learn.de.
Name Servers
co3learn.de delegates to three name servers: dns1.gwdg.de, dns2.gwdg.de and dns3.gwdg.de.
co3learn.de shares some name servers with other domains, for example bmb.forst.uni-goettingen.de, fml.tuebingen.mpg.de, 229.37.195.in-addr.arpa, informatik.uni-goettingen.de and tropenzentrum.uni-goettingen.de.
these name servers are often used with dns1.belwue.de, dns1.demogr.mpg.de, dns3.belwue.de, cooga.bgc-jena.mpg.de, elena.rz-berlin.mpg.de, dns.mpicc.de, dns-3.dfn.de, dns1.tuebingen.mpg.de, dns2.mpifr-bonn.mpg.de and dns.mpifr-bonn.mpg.de.
Host names with two IP numbers:
dns1.gwdg.de points to 2a06:93c7:e1::1 and 134.76.33.41.
dns2.gwdg.de points to 2a06:93c7:e2::1 and 134.76.33.42.
Host names with one IP number:
dns3.gwdg.de points to 193.175.210.140.
Mail Servers
co3learn.de is handled by three mail servers: a1234.mx.srv.dfn.de, b1234.mx.srv.dfn.de and c1234.mx.srv.dfn.de.
co3learn.de shares some mail servers with other domains, at least partially; for instance csl.mpg.de, mpia.de, vw.mppmu.mpg.de, hausderastronomie.de and hausderastronomie.org.
Host names with a single IP: a1234.mx.srv.dfn.de points to 194.95.232.102; b1234.mx.srv.dfn.de points to 194.95.234.102; c1234.mx.srv.dfn.de points to 194.95.238.102.