mail.app42.de - robtex.com

mail.app42.de

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:231b🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d448🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.35.27Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.212.72🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.35.27, 172.67.212.72
IPv6 hints2606:4700:3031::6815:231b, 2606:4700:3037::ac43:d448
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=131, name=cloudflare-ech.com

app42.de

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:231b🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:d448🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.35.27Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.212.72🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSelsa.ns.cloudflare.com ⭐
NStrey.ns.cloudflare.com
MXmail1.domainssaubillig.de ⭐
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.35.27, 172.67.212.72
IPv6 hints2606:4700:3031::6815:231b, 2606:4700:3037::ac43:d448
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=131, name=cloudflare-ech.com
SOAelsa.ns.cloudflare.comdns@cloudflare.com serial=2398699765

Previously MX for

app42.de

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.35.27172.67.212.722606:4700:3031::6815:231b2606:4700:3037::ac43:d448178.63.47.108
●A104.21.35.272026-04-20 → 2026-04-21 · 3 obs
○ 2016-11-25 10:33:54
● 2026-04-20 10:51:36
● 2026-04-21 19:50:28
●A172.67.212.722026-04-20 → 2026-04-21 · 3 obs
○ 2016-11-25 10:33:54
● 2026-04-20 10:51:36
● 2026-04-21 19:50:28
○A178.63.47.1082015-08-02 → 2016-11-25 · 4 obs
● 2015-08-02 00:49:42
● 2016-11-25 10:33:54
○ 2026-04-20 10:51:36
○ 2026-04-21 19:50:28
●A2606:4700:3031::6815:231b2026-04-20 → 2026-04-21 · 3 obs
○ 2016-11-25 10:33:54
● 2026-04-20 10:51:36
● 2026-04-21 19:50:28
●A2606:4700:3037::ac43:d4482026-04-20 → 2026-04-21 · 3 obs
○ 2016-11-25 10:33:54
● 2026-04-20 10:51:36
● 2026-04-21 19:50:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
dea.nic.de, f.nic.de, z.nic.de-
app42.deelsa.ns.cloudflare.com, trey.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.192.111

NS records: elsa.ns.cloudflare.com, trey.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for app42.de (unsigned zone)

⏱️ Timing

Total: 893ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.212.72, 104.21.35.27
AAAA22606:4700:3037::ac43:d448, 2606:4700:3031::6815:231b
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.app42.de points to four IP numbers: 2606:4700:3031::6815:231b, 2606:4700:3037::ac43:d448, 104.21.35.27 and 172.67.212.72.

For instance, other host names iccwt.com, xiaoipo.com.cn, we17play79.com, rdp.signalprime.com and thumbexpert.com share IP numbers with mail.app42.de.