mail-bu.de - robtex.com
mail-bu.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 159.195.51.91🇩🇰 netcup-AS159.195.48.0/22 | ||||||
| PTR | mail-bu.de | ||||||
| NS | root-dns.netcup.net ⭐ | ||||||
| A | 2a03:4000:0:1::e1e1🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| A | 46.38.225.225 | ||||||
| NS | second-dns.netcup.net | ||||||
| A | 2a03:4000:2:24b::c7c7🇩🇪 netcup-AS2a03:4000::/32 NETCUP-GMBH | ||||||
| A | 37.221.199.199 | ||||||
| NS | third-dns.netcup.net | ||||||
| A | 2a03:4001:0:106::3f44 | ||||||
| A | 188.68.63.68 | ||||||
| MX | mail-bu.de ⭐ | ||||||
| A | 159.195.51.91🇩🇰 netcup-AS159.195.48.0/22 | ||||||
| PTR | mail-bu.de | ||||||
| TXT | v=spf1 mx a:mail-bu.de ~all | ||||||
| SOA | root-dns.netcup.netdnsadmin@netcup.net 2026-03-29 #19 | ||||||
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=1777218020 | ||||||
PTR for
MX for
Same first word
mail-bu.de |
Similar names
DNS History
5 records (5 active, 0 former)
●NSroot-dns.netcup.net2026-02-22 → 2026-04-26 · 2 obs
● 2026-04-26 16:10:28
●NSsecond-dns.netcup.net2026-02-22 → 2026-04-26 · 2 obs
● 2026-04-26 16:10:28
●NSthird-dns.netcup.net2026-02-22 → 2026-04-26 · 2 obs
● 2026-04-26 16:10:28
●MXmail-bu.de2026-02-22 → 2026-04-26 · 2 obs
● 2026-04-26 16:10:28
●A159.195.51.912026-02-22 → 2026-04-26 · 2 obs
● 2026-04-26 16:10:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | f.nic.de, z.nic.de, n.de.net, a.nic.de... | - |
| mail-bu.de | root-dns.netcup.net, third-dns.netcup.net, second-dns.netcup.net | - |
✅ Authoritative Response
Server:37.221.199.199
NS records: root-dns.netcup.net, third-dns.netcup.net, second-dns.netcup.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for mail-bu.de (unsigned zone)
⏱️ Timing
Total: 1529ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 159.195.51.91 |
| NS | 3 | root-dns.netcup.net, second-dns.netcup.net... |
| MX | 1 | mail-bu.de (pri: 10) |
| TXT | 1 | v=spf1 mx a:mail-bu.de ~all |
| SOA | 1 | root-dns.netcup.net dnsadmin.netcup.net |
Analysis
Mail Server Role
mail-bu.de serves as the mail server for enkrich.de and mail-bu.de.
IP Addresses
mail-bu.de points to a single IP address: 159.195.51.91.
Name Servers
mail-bu.de is delegated to three name servers: root-dns.netcup.net, second-dns.netcup.net and third-dns.netcup.net.
At least part of the name servers for mail-bu.de are shared with other domains, for instance planet-web.de, wealth-collect.com, agnesen.de, evolutionclips.de and cl0u.de.
Host names with two IP numbers:
root-dns.netcup.net points to 2a03:4000:0:1::e1e1 and 46.38.225.225
second-dns.netcup.net points to 2a03:4000:2:24b::c7c7 and 37.221.199.199
third-dns.netcup.net points to 2a03:4001:0:106::3f44 and 188.68.63.68
Mail Servers
Mail for mail-bu.de is handled by a single mail server, mail-bu.de.
mail-bu.de shares the same mail server setup as other domains, for instance enkrich.de.
Host mail-bu.de points to IP 159.195.51.91.