rfh-koeln.de - robtex.com

rfh-koeln.de

DNSSEC⚠️ Not signed
A78.46.0.152🇩🇪 Hetzner78.46.0.0/15 HETZNER-RZ-NBG-BLK5
PTRdedi2252.your-server.de
NSans1.rh-koeln.de ⭐
A195.37.23.3🇩🇪 DFN195.37.0.0/16 -AGG-3
PTRans1.rh-koeln.de
NSans2.rh-koeln.de
A195.37.18.84🇩🇪 DFN195.37.0.0/16 -AGG-3
PTRans2.rh-koeln.de
NSdeneb.dfn.de
A2001:638:800:1::9🇩🇪 DFN2001:638::/32 -V6-AGG1
PTRdeneb.dfn.de
A192.76.176.9🇺🇸 DFN192.76.176.0/24 ZPL-NET
PTRdeneb.dfn.de
MXa1851.mx.srv.dfn.de ⭐
A194.95.232.129🇩🇪 DFN194.94.0.0/15 -AGG-16
PTRa1851.mx.srv.dfn.de
MXb1851.mx.srv.dfn.de ⭐
A194.95.234.129🇩🇪 DFN194.94.0.0/15 -AGG-16
PTRb1851.mx.srv.dfn.de
MXc1851.mx.srv.dfn.de ⭐
A194.95.238.129🇩🇪 DFN194.94.0.0/15 -AGG-16
PTRc1851.mx.srv.dfn.de
TXTadobe-idp-site-verification=934e3408e51d196824596d7102a13ee03bbf30c280675e8ba...
TXTgoogle-site-verification=ni3nAMWfVxG23Rv2yzJrHzdwcLHiAdQpyKE_T4OTs24
TXTapple-domain-verification=ZTlaK8DH4LXcXIkA
TXT"v=spf1 include:spf.protection.outlook.com ip4:195.37.22.5 a:mx01.verwaltung....
TXTMS=5F015BA84DB1BC7A3AE2C58FF504CDA2A5CDFE6A
TXTfacebook-domain-verification=j1q4yizayhuibejcv4n3m52tyvf6h6
TXTHARICA-78ex4DgIKnPsTlqExLa
SOAans1.rh-koeln.dehostmaster@rfh-koeln.de 2026-04-09 #6

de

DNSSEC🔒 Signed (DS record present)
NSf.nic.de ⭐
NSa.nic.de
NSl.de.net ⚠️ Not in parent delegation
NSn.de.net ⚠️ Not in parent delegation
NSs.de.net ⚠️ Not in parent delegation
NSz.nic.de
SOAf.nic.dedns-operations@denic.de serial=1778298446
rank #341089 globally
rank #13439 in the tld
WOT: SAFE (68/100)
📈 Tranco rank: #505,166

Subdomains

infoservice.rfh-koeln.de
iliastest.rfh-koeln.de
edumail02.rfh-koeln.de
dozmail.rfh-koeln.de
bib.rfh-koeln.de
webmail.rfh-koeln.de
dual.rfh-koeln.de
qmh.rfh-koeln.de
plandbverwaltung.rfh-koeln.de
ipv6.rfh-koeln.de
dns1.rfh-koeln.de
mailbox.rfh-koeln.de
xwiki.rfh-koeln.de
studmail.rfh-koeln.de
edumail01.rfh-koeln.de
eplan.rfh-koeln.de
druckservice.rfh-koeln.de
cls4.rfh-koeln.de
edumail.rfh-koeln.de
radius.rfh-koeln.de
dns2.rfh-koeln.de
webmail-back.rfh-koeln.de
vpool1.rfh-koeln.de
www.rfh-koeln.de
rz.rfh-koeln.de
rzsupport.rfh-koeln.de
app.rfh-koeln.de
mail.rfh-koeln.de

Same first word

rfh-koeln.de

DNS History

11 records (7 active, 4 former)

20162017201820192020202120222023202420252026NSans1.rh-koeln.deans2.rh-koeln.dedeneb.dfn.dedns1.rfh-koeln.dedns2.rfh-koeln.deMXa1851.mx.srv.dfn.deb1851.mx.srv.dfn.dec1851.mx.srv.dfn.demail.rfh-koeln.deA78.46.0.152195.37.20.135
●NSans1.rh-koeln.de2026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24
●NSans2.rh-koeln.de2026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24
●NSdeneb.dfn.de2015-08-24 → 2026-05-09 · 2 obs
● 2015-08-24 07:02:36
● 2026-05-09 04:17:24
○NSdns1.rfh-koeln.de2015-08-24 → 2018-09-06 · 4 obs
● 2015-08-24 07:02:36
● 2018-09-06 12:14:54
○ 2026-02-14 18:08:54
○ 2026-05-09 04:17:24
○NSdns2.rfh-koeln.de2015-08-24 → 2018-09-06 · 4 obs
● 2015-08-24 07:02:36
● 2018-09-06 12:14:54
○ 2026-02-14 18:08:54
○ 2026-05-09 04:17:24
●MXa1851.mx.srv.dfn.de2026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24
●MXb1851.mx.srv.dfn.de2026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24
●MXc1851.mx.srv.dfn.de2026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24
○MXmail.rfh-koeln.de2015-08-24 → 2018-09-06 · 4 obs
● 2015-08-24 07:02:36
● 2018-09-06 12:14:54
○ 2026-02-14 18:08:54
○ 2026-05-09 04:17:24
○A195.37.20.1352015-08-24 → 2018-09-06 · 4 obs
● 2015-08-24 07:02:36
● 2018-09-06 12:14:54
○ 2026-02-14 18:08:54
○ 2026-05-09 04:17:24
●A78.46.0.1522026-02-14 → 2026-05-09 · 3 obs
○ 2018-09-06 12:14:54
● 2026-02-14 18:08:54
● 2026-05-09 04:17:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dea.nic.de, f.nic.de, z.nic.de-
rfh-koeln.deans1.rh-koeln.de, ans2.rh-koeln.de, deneb.dfn.de2 records

✅ Authoritative Response

Server:195.37.18.84

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: 1047ms | Queries: -

📄 Records

TypeCountSample Data
A178.46.0.152
NS3deneb.dfn.de, ans2.rh-koeln.de...
MX3a1851.mx.srv.dfn.de (pri: 10), b1851.mx.srv.dfn.de (pri: 10)...
TXT7facebook-domain-verification=j1q4yizayhu, MS=5F015BA84DB1BC7A3AE2C58FF504CDA2A5CDF...
SOA1ans1.rh-koeln.de hostmaster.rfh-koeln.de

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ans2.rh-koeln.de, ans1.rh-koeln.de)

Analysis

Hierarchy

The parent of infoservice.rfh-koeln.de, iliastest.rfh-koeln.de, edumail02.rfh-koeln.de, dozmail.rfh-koeln.de, bib.rfh-koeln.de and a few other host names is rfh-koeln.de.

IP Addresses

rfh-koeln.de resolves to a single IP: 78.46.0.152.

Other host names, for instance teckentrup.it, teckentrup.ch, teckentrup.fr, star.de and www.rfh-koeln.de share IP numbers with rfh-koeln.de.

Name Servers

rfh-koeln.de delegates to three name servers: deneb.dfn.de, ans1.rh-koeln.de and ans2.rh-koeln.de.

rfh-koeln.de shares some name servers with other domains, for example 128.95.194.in-addr.arpa, hs-bremerhaven.de, scarlet-project.eu, biocult.net and hs-nb.eu.

these name servers are often used with dns-3.dfn.de, dns-1.dfn.de, dns-2.dfn.de, rzdnsprime.rz.tu-bs.de, rzdnssecond.rz.tu-bs.de, dnsisp1.dwd.de, dnsisp2.dwd.de, zrt7b.gfz-potsdam.de, ns1.uni-halle.de and ns2.uni-halle.de.

Host names with two IP numbers: deneb.dfn.de points to 2001:638:800:1::9 and 192.76.176.9.

Host names with one IP number: ans1.rh-koeln.de points to 195.37.23.3 and ans2.rh-koeln.de points to 195.37.18.84.

Mail Servers

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.

rfh-koeln.de shares some mail servers with other domains at least partially, for instance rfh-campus.de and studmail.rfh-koeln.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.