mail.kalkulation.info - robtex.com

mail.kalkulation.info

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:b536🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:2849🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.73Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.181.54🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.73, 172.67.181.54
IPv6 hints2606:4700:3031::ac43:b536, 2606:4700:3034::6815:2849
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=0, name=cloudflare-ech.com

kalkulation.info

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:b536🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3034::6815:2849🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.40.73Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.181.54🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSgwen.ns.cloudflare.com ⭐
NSsterling.ns.cloudflare.com
MX_dc-mx.ef7ac3c0f38d.kalkulation.info ⭐
TXTv=spf1 a mx ip4:157.250.197.42 include:relay.mailbaby.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.40.73, 172.67.181.54
IPv6 hints2606:4700:3031::ac43:b536, 2606:4700:3034::6815:2849
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=0, name=cloudflare-ech.com
SOAgwen.ns.cloudflare.comdns@cloudflare.com serial=2409766754
⚠️ On DNS blocklist: tif

Previously MX for

kalkulation.info

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.40.73172.67.181.542606:4700:3031::ac43:b5362606:4700:3034::6815:2849127.0.0.1
●A104.21.40.732026-08-08 → 2026-08-08 · 2 obs
○ 2016-09-26 06:38:26
● 2026-08-08 12:04:40
○A127.0.0.12015-06-17 → 2016-09-26 · 3 obs
● 2015-06-17 00:16:40
● 2016-09-26 06:38:26
○ 2026-08-08 12:04:40
●A172.67.181.542026-08-08 → 2026-08-08 · 2 obs
○ 2016-09-26 06:38:26
● 2026-08-08 12:04:40
●A2606:4700:3031::ac43:b5362026-08-08 → 2026-08-08 · 2 obs
○ 2016-09-26 06:38:26
● 2026-08-08 12:04:40
●A2606:4700:3034::6815:28492026-08-08 → 2026-08-08 · 2 obs
○ 2016-09-26 06:38:26
● 2026-08-08 12:04:40

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
infoa0.info.afilias-nst.info, a2.info.afilias-nst.info, c0.info.afilias-nst.info-
kalkulation.infogwen.ns.cloudflare.com, sterling.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.35.143

NS records: gwen.ns.cloudflare.com, sterling.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for kalkulation.info (unsigned zone)

⏱️ Timing

Total: 245ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.40.73, 172.67.181.54
AAAA22606:4700:3031::ac43:b536, 2606:4700:3034::6815:2849
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.kalkulation.info points to the four IP addresses 104.21.40.73, 172.67.181.54, 2606:4700:3031::ac43:b536 and 2606:4700:3034::6815:2849.

doktornet.de, imtoken.la, dian4d6.site and two other host names share IP numbers with mail.kalkulation.info.