mail.checourse.com - robtex.com

mail.checourse.com

DNSSEC⚠️ Not signed

checourse.com

DNSSEC⚠️ Not signed
A2606:4700:3032::ac43:cf5e🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::6815:3d4a🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.61.74Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.207.94🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSalbert.ns.cloudflare.com ⭐
NSdalary.ns.cloudflare.com
MXroute2.mx.cloudflare.net ⭐
MXroute1.mx.cloudflare.net(28)
MXroute3.mx.cloudflare.net(94)
TXTv=spf1 include:_spf.mx.cloudflare.net ~all
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.61.74, 172.67.207.94
IPv6 hints2606:4700:3032::ac43:cf5e, 2606:4700:3037::6815:3d4a
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=16, name=cloudflare-ech.com
SOAalbert.ns.cloudflare.comdns@cloudflare.com serial=2402100108

Previously MX for

checourse.com

Same first word

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DNS History

1 record (0 active, 1 former)

20162017201820192020202120222023202420252026A68.15.28.185
○A68.15.28.1852015-08-04 → 2016-07-13 · 4 obs
● 2015-08-04 10:25:14
● 2016-07-13 15:36:08
○ 2026-05-10 13:12:16
○ 2026-05-12 06:59:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coml.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...-
checourse.comalbert.ns.cloudflare.com, dalary.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.58

NS records: albert.ns.cloudflare.com, dalary.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for checourse.com (unsigned zone)

⏱️ Timing

Total: 267ms | Queries: -

📄 Records

TypeCountSample Data

📌 Glue Records Collected

Total: 12

Out-of-bailiwick: 12 (albert.ns.cloudflare.com, albert.ns.cloudflare.com, albert.ns.cloudflare.com...)