www.flexicourses.com - robtex.com

www.flexicourses.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:9be7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:510d🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.81.13Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.155.231🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.81.13, 172.67.155.231
IPv6 hints2606:4700:3030::ac43:9be7, 2606:4700:3031::6815:510d
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=39, name=cloudflare-ech.com

flexicourses.com

DNSSEC⚠️ Not signed
A2606:4700:3030::ac43:9be7🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3031::6815:510d🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.81.13Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.155.231🇺🇸 Cloudflare172.67.144.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSanuj.ns.cloudflare.com ⭐
NSmina.ns.cloudflare.com
MXmx.stackmail.com ⭐
TXTgoogle-site-verification=RgfwmsCA58TL8sCHeCFI3kvD-nW0WibGmP-UgKoBNyU
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.81.13, 172.67.155.231
IPv6 hints2606:4700:3030::ac43:9be7, 2606:4700:3031::6815:510d
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=39, name=cloudflare-ech.com
SOAanuj.ns.cloudflare.comdns@cloudflare.com serial=2410480920
📈 Tranco rank: #877,780

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DNS History

8 records (4 active, 4 former)

A104.21.81.13172.67.155.2312606:4700:3030::ac43:9be72606:4700:3031::6815:510d188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●A104.21.81.132026-08-03 → 2026-08-03 · 2 obs
○ 2026-06-29 01:32:20
● 2026-08-03 16:18:46
●A172.67.155.2312026-08-03 → 2026-08-03 · 2 obs
○ 2026-06-29 01:32:20
● 2026-08-03 16:18:46
○A188.114.96.02026-06-29 → 2026-06-29 · 2 obs
● 2026-06-29 01:32:20
○ 2026-08-03 16:18:46
○A188.114.97.02026-06-29 → 2026-06-29 · 2 obs
● 2026-06-29 01:32:20
○ 2026-08-03 16:18:46
●A2606:4700:3030::ac43:9be72026-08-03 → 2026-08-03 · 2 obs
○ 2026-06-29 01:32:20
● 2026-08-03 16:18:46
●A2606:4700:3031::6815:510d2026-08-03 → 2026-08-03 · 2 obs
○ 2026-06-29 01:32:20
● 2026-08-03 16:18:46
○A2a06:98c1:3120::2026-06-29 → 2026-06-29 · 2 obs
● 2026-06-29 01:32:20
○ 2026-08-03 16:18:46
○A2a06:98c1:3121::2026-06-29 → 2026-06-29 · 2 obs
● 2026-06-29 01:32:20
○ 2026-08-03 16:18:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net, k.gtld-servers.net...-
flexicourses.comanuj.ns.cloudflare.com, mina.ns.cloudflare.com12 records

✅ Authoritative Response

Server:108.162.193.65

NS records: anuj.ns.cloudflare.com, mina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for flexicourses.com (unsigned zone)

⏱️ Timing

Total: 191ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.155.231, 104.21.81.13
AAAA22606:4700:3030::ac43:9be7, 2606:4700:3031::6815:510d
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

www.flexicourses.com resolves to four IP addresses: 104.21.81.13, 172.67.155.231, 2606:4700:3030::ac43:9be7 and 2606:4700:3031::6815:510d.

Among the host names that share IP numbers with www.flexicourses.com are 5agc.xyz, kokowaiworksco.click, myopenai.214839648.workers.dev and two others.