join.coursefromscratch.com - robtex.com

join.coursefromscratch.com

DNSSEC⚠️ Not signed
A2606:4700:3037::6815:2ef1🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3037::ac43:8f2f🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.46.241Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.143.47🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.46.241, 172.67.143.47
IPv6 hints2606:4700:3037::6815:2ef1, 2606:4700:3037::ac43:8f2f
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=151, name=cloudflare-ech.com

coursefromscratch.com

DNSSEC⚠️ Not signed
A2606:4700::6810:cc2🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A2606:4700::6810:dc2🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A2606:4700::6810:ec2🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A2606:4700::6810:fc2🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A2606:4700::6810:10c2🇺🇸 Cloudflare2606:4700::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.16.12.194Cloudflare104.16.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.16.13.194Cloudflare104.16.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.16.14.194Cloudflare104.16.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.16.15.194Cloudflare104.16.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
A104.16.16.194Cloudflare104.16.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US
NSterin.ns.cloudflare.com ⭐
NSzelda.ns.cloudflare.com
MXeforward1.registrar-servers.com ⭐
MXeforward2.registrar-servers.com ⭐
MXeforward3.registrar-servers.com ⭐
MXeforward4.registrar-servers.com(15)
MXeforward5.registrar-servers.com(20)
TXTgoogle-site-verification=PRFT7EnSho8WdPONZDxJaqURiyyRMOKJIK8QN8_E4c4
TXTgoogle-site-verification=h1oAw6xCSddJG-fo4u2-2qjoio5tpBOcRDzzWv8MYzE
TXTv=spf1 include:spf.efwd.registrar-servers.com ~all
SOAterin.ns.cloudflare.comdns@cloudflare.com serial=2401066642
⚠️ On DNS blocklist: tif

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DNS History

4 records (4 active, 0 former)

A104.21.46.241172.67.143.472606:4700:3037::6815:2ef12606:4700:3037::ac43:8f2f
●A104.21.46.2412026-03-07 → 2026-05-11 · 2 obs
● 2026-03-07 19:56:54
● 2026-05-11 04:04:34
●A172.67.143.472026-03-07 → 2026-05-11 · 2 obs
● 2026-03-07 19:56:54
● 2026-05-11 04:04:34
●A2606:4700:3037::6815:2ef12026-03-07 → 2026-05-11 · 2 obs
● 2026-03-07 19:56:54
● 2026-05-11 04:04:34
●A2606:4700:3037::ac43:8f2f2026-03-07 → 2026-05-11 · 2 obs
● 2026-03-07 19:56:54
● 2026-05-11 04:04:34

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comh.gtld-servers.net, c.gtld-servers.net, i.gtld-servers.net, b.gtld-servers.net...-
coursefromscratch.comzelda.ns.cloudflare.com, terin.ns.cloudflare.com12 records

✅ Authoritative Response

Server:172.64.33.236

NS records: zelda.ns.cloudflare.com, terin.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coursefromscratch.com (unsigned zone)

⏱️ Timing

Total: 183ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.46.241, 172.67.143.47
AAAA22606:4700:3037::ac43:8f2f, 2606:4700:3037::6815:2ef1
HTTPS1{"priority":1,"target":".","alpn":["h3",

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

join.coursefromscratch.com maps to four IP numbers: 2606:4700:3037::6815:2ef1, 2606:4700:3037::ac43:8f2f, 104.21.46.241 and 172.67.143.47.

other host names include purch.org.cn, perv(0x736c7574).com, advancedmanufacturing.com.au, snowcloud.pro and 24matrixlogic.pics; they share IP numbers with join.coursefromscratch.com.