mail.linuxlinus.de - dns.ninja

mail.linuxlinus.de

DNSSEC⚠️ Not signed
A2606:4700:3032::6815:1715🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d06c🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.23.21Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.208.108🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.23.21, 172.67.208.108
IPv6 hints2606:4700:3032::6815:1715, 2606:4700:3037::ac43:d06c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=113, name=cloudflare-ech.com

linuxlinus.de

DNSSEC🔒 Signed (DS record present)
A2606:4700:3032::6815:1715🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d06c🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.23.21Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.208.108🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSiris.ns.cloudflare.com ⭐
NSruben.ns.cloudflare.com
MXmail.linuxlinus.de ⭐
MXmx2fc9.netcup.net(50)
TXTv=spf1 mx a include:_spf.webhosting.systems ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.23.21, 172.67.208.108
IPv6 hints2606:4700:3032::6815:1715, 2606:4700:3037::ac43:d06c
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=113, name=cloudflare-ech.com
SOAiris.ns.cloudflare.comdns@cloudflare.com serial=2410153502

MX for

linuxlinus.de

Same first word

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DNS History

13 records (4 active, 9 former)

A104.21.23.21172.67.208.1082606:4700:3032::6815:17152606:4700:3037::ac43:d06c172.64.80.1188.114.96.0188.114.97.02606:4700:130:436c:6f75:6466:6c61:72652606:4700:3033::ac43:d06c2a06:98c1:3120::2a06:98c1:3120::42a06:98c1:3121::2a06:98c1:3121::4
●A104.21.23.212026-03-20 → 2026-08-03 · 11 obs
● 2026-03-20 10:32:34
● 2026-04-29 18:17:00
○ 2026-04-30 15:47:30
● 2026-05-01 05:01:28
● 2026-05-01 19:17:44
○ 2026-05-02 12:47:44
○ 2026-06-12 16:55:44
● 2026-07-11 02:30:40
○ 2026-07-14 15:52:50
● 2026-08-01 20:58:54
● 2026-08-03 00:40:36
○A172.64.80.12026-03-20 → 2026-08-03 · 2 obs
○ 2026-03-20 10:32:34
○ 2026-08-03 00:40:36
●A172.67.208.1082026-03-20 → 2026-08-03 · 11 obs
● 2026-03-20 10:32:34
● 2026-04-29 18:17:00
○ 2026-04-30 15:47:30
● 2026-05-01 05:01:28
● 2026-05-01 19:17:44
○ 2026-05-02 12:47:44
○ 2026-06-12 16:55:44
● 2026-07-11 02:30:40
○ 2026-07-14 15:52:50
● 2026-08-01 20:58:54
● 2026-08-03 00:40:36
○A188.114.96.02026-04-30 → 2026-07-14 · 10 obs
○ 2026-04-29 18:17:00
● 2026-04-30 15:47:30
○ 2026-05-01 05:01:28
○ 2026-05-01 19:17:44
● 2026-05-02 12:47:44
● 2026-06-12 16:55:44
○ 2026-07-11 02:30:40
● 2026-07-14 15:52:50
○ 2026-08-01 20:58:54
○ 2026-08-03 00:40:36
○A188.114.97.02026-04-30 → 2026-07-14 · 10 obs
○ 2026-04-29 18:17:00
● 2026-04-30 15:47:30
○ 2026-05-01 05:01:28
○ 2026-05-01 19:17:44
● 2026-05-02 12:47:44
● 2026-06-12 16:55:44
○ 2026-07-11 02:30:40
● 2026-07-14 15:52:50
○ 2026-08-01 20:58:54
○ 2026-08-03 00:40:36
○A2606:4700:130:436c:6f75:6466:6c61:72652026-03-20 → 2026-08-03 · 2 obs
○ 2026-03-20 10:32:34
○ 2026-08-03 00:40:36
●A2606:4700:3032::6815:17152026-03-20 → 2026-08-03 · 11 obs
● 2026-03-20 10:32:34
● 2026-04-29 18:17:00
○ 2026-04-30 15:47:30
● 2026-05-01 05:01:28
● 2026-05-01 19:17:44
○ 2026-05-02 12:47:44
○ 2026-06-12 16:55:44
● 2026-07-11 02:30:40
○ 2026-07-14 15:52:50
● 2026-08-01 20:58:54
● 2026-08-03 00:40:36
○A2606:4700:3033::ac43:d06c2026-03-20 → 2026-05-01 · 7 obs
● 2026-03-20 10:32:34
● 2026-04-29 18:17:00
○ 2026-04-30 15:47:30
● 2026-05-01 05:01:28
● 2026-05-01 19:17:44
○ 2026-05-02 12:47:44
○ 2026-08-03 00:40:36
●A2606:4700:3037::ac43:d06c2026-07-11 → 2026-08-03 · 5 obs
○ 2026-06-12 16:55:44
● 2026-07-11 02:30:40
○ 2026-07-14 15:52:50
● 2026-08-01 20:58:54
● 2026-08-03 00:40:36
○A2a06:98c1:3120::2026-04-30 → 2026-07-15 · 10 obs
○ 2026-04-29 18:17:00
● 2026-04-30 15:47:30
○ 2026-05-01 05:01:28
○ 2026-05-01 19:17:44
● 2026-05-02 12:47:44
● 2026-06-12 16:55:44
○ 2026-07-11 02:30:40
● 2026-07-15 15:58:54
○ 2026-08-01 20:58:54
○ 2026-08-03 00:40:36
○A2a06:98c1:3120::42026-07-14 → 2026-07-14 · 4 obs
○ 2026-07-11 02:30:40
● 2026-07-14 15:52:50
○ 2026-07-15 15:58:54
○ 2026-08-03 00:40:36
○A2a06:98c1:3121::2026-04-30 → 2026-07-15 · 10 obs
○ 2026-04-29 18:17:00
● 2026-04-30 15:47:30
○ 2026-05-01 05:01:28
○ 2026-05-01 19:17:44
● 2026-05-02 12:47:44
● 2026-06-12 16:55:44
○ 2026-07-11 02:30:40
● 2026-07-15 15:58:54
○ 2026-08-01 20:58:54
○ 2026-08-03 00:40:36
○A2a06:98c1:3121::42026-07-14 → 2026-07-14 · 4 obs
○ 2026-07-11 02:30:40
● 2026-07-14 15:52:50
○ 2026-07-15 15:58:54
○ 2026-08-03 00:40:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dea.nic.de, f.nic.de, z.nic.de-
linuxlinus.deiris.ns.cloudflare.com, ruben.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.35.71

NS records: iris.ns.cloudflare.com, ruben.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 757ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.208.108, 104.21.23.21
AAAA22606:4700:3037::ac43:d06c, 2606:4700:3032::6815:1715
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

Mail Server Role

The mail server mail.linuxlinus.de processes email for linuxlinus.de.

mx2fc9.netcup.net is a mail server commonly deployed alongside mail.linuxlinus.de.

IP Addresses

mail.linuxlinus.de points to the four IP addresses 104.21.23.21, 172.67.208.108, 2606:4700:3032::6815:1715 and 2606:4700:3037::ac43:d06c.

Two other host names, along with hyper360sphere.digital, kilroy.at and studylink.com.au, also share IP numbers with mail.linuxlinus.de.