mail.contabo.co - robtex.com

mail.contabo.co

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:14c7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:c21f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.20.199Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.194.31🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.20.199, 172.67.194.31
IPv6 hints2606:4700:3030::6815:14c7, 2606:4700:3037::ac43:c21f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=227, name=cloudflare-ech.com

contabo.co

DNSSEC⚠️ Not signed
A2606:4700:3030::6815:14c7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:c21f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.20.199Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.194.31🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSben.ns.cloudflare.com ⭐
NSsue.ns.cloudflare.com
MXmail.contabo.co ⭐
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.20.199, 172.67.194.31
IPv6 hints2606:4700:3030::6815:14c7, 2606:4700:3037::ac43:c21f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=227, name=cloudflare-ech.com
SOAben.ns.cloudflare.comdns@cloudflare.com serial=2402584716

MX for

contabo.co

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DNS History

6 records (4 active, 2 former)

20162017201820192020202120222023202420252026A104.21.20.199172.67.194.312606:4700:3030::6815:14c72606:4700:3037::ac43:c21f91.194.91.21591.194.91.220
●A104.21.20.1992026-02-14 → 2026-04-28 · 3 obs
○ 2016-11-15 18:50:16
● 2026-02-14 18:48:20
● 2026-04-28 01:35:58
●A172.67.194.312026-02-14 → 2026-04-28 · 3 obs
○ 2016-11-15 18:50:16
● 2026-02-14 18:48:20
● 2026-04-28 01:35:58
●A2606:4700:3030::6815:14c72026-02-14 → 2026-04-28 · 3 obs
○ 2016-11-15 18:50:16
● 2026-02-14 18:48:20
● 2026-04-28 01:35:58
●A2606:4700:3037::ac43:c21f2026-02-14 → 2026-04-28 · 3 obs
○ 2016-11-15 18:50:16
● 2026-02-14 18:48:20
● 2026-04-28 01:35:58
○A91.194.91.2152015-07-16 → 2016-01-27 · 4 obs
● 2015-07-16 01:45:28
● 2016-01-27 20:13:24
○ 2016-05-01 23:06:12
○ 2026-04-28 01:35:58
○A91.194.91.2202016-05-01 → 2016-11-15 · 5 obs
○ 2016-01-27 20:13:24
● 2016-05-01 23:06:12
● 2016-11-15 18:50:16
○ 2026-02-14 18:48:20
○ 2026-04-28 01:35:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coc.registrydns.co, b.registrydns.co, d.registrydns.co, a.registrydns.co-
contabo.coben.ns.cloudflare.com, sue.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.33.103

NS records: ben.ns.cloudflare.com, sue.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for contabo.co (unsigned zone)

⏱️ Timing

Total: 501ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.20.199, 172.67.194.31
AAAA22606:4700:3030::6815:14c7, 2606:4700:3037::ac43:c21f
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

Mail Server Role

mail.contabo.co is the mail server for contabo.co.

IP Addresses

mail.contabo.co resolves to four IP numbers: 2606:4700:3030::6815:14c7, 2606:4700:3037::ac43:c21f, 104.21.20.199 and 172.67.194.31.

other host names for instance www.refinery.uk.com, douceurvitalite.store, comelv.com, mail.tribe513.org and commonality.uouofun.com share IP numbers with mail.contabo.co.