mail.oncourse.se - robtex.com

mail.oncourse.se

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:23bc🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:b299🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.35.188Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.178.153🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.35.188, 172.67.178.153
IPv6 hints2606:4700:3031::6815:23bc, 2606:4700:3031::ac43:b299
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=6, name=cloudflare-ech.com

oncourse.se

DNSSEC⚠️ Not signed
A2606:4700:3031::6815:23bc🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::ac43:b299🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.35.188Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.178.153🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSbradley.ns.cloudflare.com ⭐
NStegan.ns.cloudflare.com
MXmailcluster.loopia.se ⭐
MXmail2.loopia.se(20)
TXTgoogle-site-verification=v7FBD4ADFeJb27TiPqQleR0iuo0y2mMhMrphwWEbwVw
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.35.188, 172.67.178.153
IPv6 hints2606:4700:3031::6815:23bc, 2606:4700:3031::ac43:b299
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=6, name=cloudflare-ech.com
SOAbradley.ns.cloudflare.comdns@cloudflare.com serial=2399701105

Previously MX for

oncourse.se

Same first word

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DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026A104.21.35.188172.67.178.1532606:4700:3031::6815:23bc2606:4700:3031::ac43:b299195.74.38.202
●A104.21.35.1882026-04-14 → 2026-04-14 · 2 obs
○ 2016-05-05 19:42:30
● 2026-04-14 06:00:28
●A172.67.178.1532026-04-14 → 2026-04-14 · 2 obs
○ 2016-05-05 19:42:30
● 2026-04-14 06:00:28
○A195.74.38.2022015-05-06 → 2016-01-02 · 4 obs
● 2015-05-06 06:37:12
● 2016-01-02 10:07:42
○ 2016-05-05 19:42:30
○ 2026-04-14 06:00:28
●A2606:4700:3031::6815:23bc2026-04-14 → 2026-04-14 · 2 obs
○ 2016-05-05 19:42:30
● 2026-04-14 06:00:28
●A2606:4700:3031::ac43:b2992026-04-14 → 2026-04-14 · 2 obs
○ 2016-05-05 19:42:30
● 2026-04-14 06:00:28

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
sez.ns.se, a.ns.se, x.ns.se, i.ns.se...-
oncourse.setegan.ns.cloudflare.com, bradley.ns.cloudflare.com-

✅ Authoritative Response

Server:172.64.32.226

NS records: tegan.ns.cloudflare.com, bradley.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for oncourse.se (unsigned zone)

⏱️ Timing

Total: 659ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.178.153, 104.21.35.188
AAAA22606:4700:3031::6815:23bc, 2606:4700:3031::ac43:b299
HTTPS1{"priority":1,"target":".","alpn":["h3",

Analysis

IP Addresses

mail.oncourse.se maps to four IP numbers: 2606:4700:3031::6815:23bc, 2606:4700:3031::ac43:b299, 104.21.35.188 and 172.67.178.153.

Other host names, for instance pencilsharpener.company, www.qjaype.cc, russianarms.ru, littlechefni.com and www.pira.at share IP numbers with mail.oncourse.se.