jacobi-server.de - robtex.com
jacobi-server.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 213.241.163.222🇩🇪 OSN213.241.128.0/18 -NET | ||||||
| PTR | mail.jacobi-server.de | ||||||
| NS | dns.osn.de ⭐ | ||||||
| A | 194.45.27.73🇩🇪 OSN194.45.27.0/24 -NET | ||||||
| NS | dns.osn.net | ||||||
| A | 95.179.241.54🇩🇪 AS-VULTR95.179.240.0/20 Vultr Assigned Prefix | ||||||
| NS | dns.osn.org | ||||||
| A | 213.241.148.43🇩🇪 OSN213.241.128.0/18 -NET | ||||||
| MX | mail.jacobi-server.de ⭐ | ||||||
| A | 213.241.163.222🇩🇪 OSN213.241.128.0/18 -NET | ||||||
| PTR | mail.jacobi-server.de | ||||||
| TXT | v=spf1 include:jacobi.to ~all | ||||||
| SOA | dns.osn.deroot@osn.de serial=1764757320 | ||||||
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=1785349638 | ||||||
Subdomains
mail.jacobi-server.de |
Same first word
jacobi-server.de |
DNS History
7 records (5 active, 2 former)
●NSdns.osn.de2026-03-24 → 2026-07-29 · 3 obs
● 2026-03-24 18:52:12
● 2026-07-29 18:49:46
●NSdns.osn.net2026-03-24 → 2026-07-29 · 3 obs
● 2026-03-24 18:52:12
● 2026-07-29 18:49:46
●NSdns.osn.org2026-03-24 → 2026-07-29 · 3 obs
● 2026-03-24 18:52:12
● 2026-07-29 18:49:46
○NSns1.jacobi-jcs.de2020-04-14 → 2020-04-14 · 3 obs
○ 2026-03-24 18:52:12
○ 2026-07-29 18:49:46
○NSns2.jacobi-jcs.de2020-04-14 → 2020-04-14 · 3 obs
○ 2026-03-24 18:52:12
○ 2026-07-29 18:49:46
●MXmail.jacobi-server.de2020-04-14 → 2026-07-29 · 2 obs
● 2026-07-29 18:49:46
●A213.241.163.2222020-04-14 → 2026-07-29 · 2 obs
● 2026-07-29 18:49:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | a.nic.de, f.nic.de, z.nic.de | - |
| jacobi-server.de | dns.osn.de, dns.osn.org, dns.osn.net | 1 record |
✅ Authoritative Response
Server:194.45.27.73
NS records: dns.osn.de, dns.osn.org, dns.osn.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for jacobi-server.de (unsigned zone)
⏱️ Timing
Total: 1136ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 213.241.163.222 |
| NS | 3 | dns.osn.de, dns.osn.net... |
| MX | 1 | mail.jacobi-server.de (pri: 10) |
| TXT | 1 | v=spf1 include:jacobi.to ~all |
| SOA | 1 | dns.osn.de root.osn.de |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (dns.osn.de)
Analysis
Hierarchy
The domain mail.jacobi-server.de falls under the parent jacobi-server.de.
IP Addresses
jacobi-server.de resolves to just one IP address, 213.241.163.222.
mail.jacobi-server.de, for instance, is one of the other host names sharing IP numbers with jacobi-server.de.
Name Servers
The authoritative name servers for jacobi-server.de are dns.osn.de, dns.osn.net and dns.osn.org — three in total.
At least some of jacobi-server.de's name servers are shared with other domains, for example hipp.uk, jg.de, 80.114.212.in-addr.arpa and two more.
The hostnames dns.osn.de, dns.osn.net and dns.osn.org each resolve to a single IP: dns.osn.de → 194.45.27.73, dns.osn.net → 95.179.241.54, dns.osn.org → 213.241.148.43.
Mail Servers
The sole mail server for jacobi-server.de is mail.jacobi-server.de.
mail.jacobi-server.de directs to just one IP number, 213.241.163.222.