ctbk.de - robtex.com
ctbk.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2a03:4000:61:8560::20:2341🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| A | 202.61.232.157🇩🇪 netcup-AS202.61.232.0/24 | ||||||
| NS | root-dns.netcup.net ⭐ | ||||||
| A | 2a03:4000:0:1::e1e1🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| PTR | root-dns.netcup.net | ||||||
| A | 46.38.225.225🇩🇪 netcup-AS46.38.225.0/24 | ||||||
| PTR | root-dns.netcup.net | ||||||
| NS | second-dns.netcup.net | ||||||
| A | 2a03:4000:2:24b::c7c7🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| PTR | second-dns.netcup.net | ||||||
| A | 37.221.199.199🇩🇪 netcup-AS37.221.196.0/22 | ||||||
| PTR | second-dns.netcup.net | ||||||
| NS | third-dns.netcup.net | ||||||
| A | 2a03:4001:0:106::3f44🇩🇪 netcup-AS2a03:4001::/32 NETCUP-GMBH | ||||||
| PTR | third-dns.netcup.net | ||||||
| A | 188.68.63.68🇩🇪 netcup-AS188.68.63.0/24 NETCUP-GMBH | ||||||
| PTR | third-dns.netcup.net | ||||||
| MX | mxe89f.netcup.net ⭐ | ||||||
| A | 2a03:4000:0:2c7:747e:83ff:fe0c:ee14🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| PTR | mxe89f.netcup.net | ||||||
| A | 202.61.232.159🇩🇪 netcup-AS202.61.232.0/24 | ||||||
| PTR | mxe89f.netcup.net | ||||||
| TXT | v=spf1 mx a include:_spf.webhosting.systems ~all | ||||||
| TXT | google-site-verification=NomXQS-ny2vEZ2EBpMgR4hFlcQHV0mJTdfC4GDdIKAE | ||||||
| SOA | root-dns.netcup.netdnsadmin@netcup.net 2026-07-09 #77 | ||||||
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=1785747295 | ||||||
Subdomains
git.ctbk.de |
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●NSroot-dns.netcup.net2026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
●NSsecond-dns.netcup.net2026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
●NSthird-dns.netcup.net2026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
●MXmxe89f.netcup.net2026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
●A202.61.232.1572026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
●A2a03:4000:61:8560::20:23412026-05-12 → 2026-08-03 · 2 obs
● 2026-08-03 09:50:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| ctbk.de | root-dns.netcup.net, third-dns.netcup.net, second-dns.netcup.net | - |
✅ Authoritative Response
Server:46.38.225.225
NS records: root-dns.netcup.net, third-dns.netcup.net, second-dns.netcup.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for ctbk.de (unsigned zone)
⏱️ Timing
Total: 1130ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.61.232.157 |
| AAAA | 1 | 2a03:4000:61:8560::20:2341 |
| NS | 3 | root-dns.netcup.net, second-dns.netcup.net... |
| MX | 1 | mxe89f.netcup.net (pri: 50) |
| TXT | 2 | google-site-verification=NomXQS-ny2vEZ2E, v=spf1 mx a include:_spf.webhosting.syst |
| SOA | 1 | root-dns.netcup.net dnsadmin.netcup.net |
Analysis
Hierarchy
ctbk.de is the parent zone for git.ctbk.de.
IP Addresses
ctbk.de resolves to the IP addresses 202.61.232.157 and 2a03:4000:61:8560::20:2341
Two other host names, along with off-theater.de, schachschule.de and enterprise.itscene.de, also share IP numbers with ctbk.de.
Name Servers
The authoritative name servers for ctbk.de are root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net — three in total.
ctbk.de partially shares its NS delegation with several other domains, including zthr.de, biodanza-osnabrueck.de, deutsche-internetagentur.de and two others.
root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net all resolve to exactly two IP numbers apiece: root-dns.netcup.net → 46.38.225.225 and 2a03:4000:0:1::e1e1; second-dns.netcup.net → 37.221.199.199 and 2a03:4000:2:24b::c7c7; third-dns.netcup.net → 188.68.63.68 and 2a03:4001:0:106::3f44.
Mail Servers
The sole mail server for ctbk.de is mxe89f.netcup.net.
ctbk.de has mail servers in common with gourmetfestival.de, shgf.de, db7te.de and fjordblau.de, among others.
There is at least a partial MX overlap between ctbk.de and other domains, including gesundu.com, dream-community.de, indiekultur.de and two others.
These mail servers tend to appear in combination with mail servers mail.gesundu.com, mail.dream-community.de, mail.indiekultur.de and 4 others.
The host mxe89f.netcup.net resolves to 202.61.232.159 and 2a03:4000:0:2c7:747e:83ff:fe0c:ee14 — two IP addresses.