studmail.rfh-koeln.de - robtex.com
studmail.rfh-koeln.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 195.37.22.8🇩🇪 DFN195.37.0.0/16 -AGG-3 | ||||||
| PTR | edumail.rfh-koeln.de | ||||||
| MX | a1851.mx.srv.dfn.de ⭐ | ||||||
| A | 194.95.232.129🇩🇪 DFN194.94.0.0/15 -AGG-16 | ||||||
| PTR | a1851.mx.srv.dfn.de | ||||||
| MX | b1851.mx.srv.dfn.de ⭐ | ||||||
| A | 194.95.234.129🇩🇪 DFN194.94.0.0/15 -AGG-16 | ||||||
| PTR | b1851.mx.srv.dfn.de | ||||||
| MX | c1851.mx.srv.dfn.de ⭐ | ||||||
| A | 194.95.238.129🇩🇪 DFN194.94.0.0/15 -AGG-16 | ||||||
| PTR | c1851.mx.srv.dfn.de | ||||||
| TXT | MS=56319A559AEFB2D705695A93628A693CBB486452 | ||||||
| TXT | v=spf1 a:studmail.rfh-koeln.de a:mail.rfh-campus.de a:edumail.rfh-koeln.de a:... | ||||||
rfh-koeln.de
| DNSSEC | ⚠️ Not signed | ||||||
| A | 78.46.0.152🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5 | ||||||
| NS | ans1.rh-koeln.de ⭐ | ||||||
| NS | ans2.rh-koeln.de | ||||||
| NS | deneb.dfn.de | ||||||
| MX | a1851.mx.srv.dfn.de ⭐ | ||||||
| MX | b1851.mx.srv.dfn.de ⭐ | ||||||
| MX | c1851.mx.srv.dfn.de ⭐ | ||||||
| TXT | facebook-domain-verification=j1q4yizayhuibejcv4n3m52tyvf6h6 | ||||||
| TXT | adobe-idp-site-verification=934e3408e51d196824596d7102a13ee03bbf30c280675e8ba... | ||||||
| TXT | google-site-verification=ni3nAMWfVxG23Rv2yzJrHzdwcLHiAdQpyKE_T4OTs24 | ||||||
| TXT | apple-domain-verification=ZTlaK8DH4LXcXIkA | ||||||
| TXT | HARICA-78ex4DgIKnPsTlqExLa | ||||||
| TXT | MS=5F015BA84DB1BC7A3AE2C58FF504CDA2A5CDFE6A | ||||||
| TXT | "v=spf1 include:spf.protection.outlook.com ip4:195.37.22.5 a:mx01.verwaltung.... | ||||||
| SOA | ans1.rh-koeln.dehostmaster@rfh-koeln.de 2026-04-09 #6 | ||||||
rank #341089 globally
rank #13439 in the tld
WOT: SAFE (68/100)
📈 Tranco rank: #505,166
PTR for
Same first word
Similar names
DNS History
6 records (4 active, 2 former)
●MXa1851.mx.srv.dfn.de2026-05-09 → 2026-05-09 · 3 obs
● 2026-05-09 07:33:44
● 2026-05-09 07:33:46
●MXb1851.mx.srv.dfn.de2026-05-09 → 2026-05-09 · 3 obs
● 2026-05-09 07:33:44
● 2026-05-09 07:33:46
●MXc1851.mx.srv.dfn.de2026-05-09 → 2026-05-09 · 3 obs
● 2026-05-09 07:33:44
● 2026-05-09 07:33:46
○MXstudmail.rfh-koeln.de2015-07-16 → 2017-01-18 · 4 obs
● 2017-01-18 16:37:14
○ 2026-05-09 07:33:44
○ 2026-05-09 07:33:46
○A195.37.20.1732015-07-16 → 2017-01-18 · 4 obs
● 2017-01-18 16:37:14
○ 2026-05-09 07:33:44
○ 2026-05-09 07:33:46
●A195.37.22.82026-05-09 → 2026-05-09 · 3 obs
● 2026-05-09 07:33:44
● 2026-05-09 07:33:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| de | z.nic.de, a.nic.de, f.nic.de | - |
| rfh-koeln.de | ans1.rh-koeln.de, ans2.rh-koeln.de, deneb.dfn.de | 2 records |
✅ Authoritative Response
Server:195.37.23.3
NS records: ans1.rh-koeln.de, ans2.rh-koeln.de, deneb.dfn.de
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rfh-koeln.de (unsigned zone)
⏱️ Timing
Total: 1460ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 195.37.22.8 |
| MX | 3 | c1851.mx.srv.dfn.de (pri: 10), a1851.mx.srv.dfn.de (pri: 10)... |
| TXT | 2 | MS=56319A559AEFB2D705695A93628A693CBB486, v=spf1 a:studmail.rfh-koeln.de a:mail.rf |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ans2.rh-koeln.de, ans1.rh-koeln.de)
Analysis
IP Addresses
studmail.rfh-koeln.de maps to IP address 195.37.22.8.
Other host names, for example dozmail.rfh-koeln.de, edumail.rfh-koeln.de and mail.rfh-campus.de share the same IP as studmail.rfh-koeln.de.
Mail Servers
studmail.rfh-koeln.de is handled by three mail servers: a1851.mx.srv.dfn.de, b1851.mx.srv.dfn.de and c1851.mx.srv.dfn.de.
studmail.rfh-koeln.de shares some mail servers with other domains, for instance rfh-koeln.de and rfh-campus.de.
Host names with a single IP:
a1851.mx.srv.dfn.de points to 194.95.232.129
b1851.mx.srv.dfn.de points to 194.95.234.129
c1851.mx.srv.dfn.de points to 194.95.238.129