startupclass.co - robtex.com

startupclass.co

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:de4aCloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:1921Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.25.33Cloudflare104.21.16.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.222.74Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSian.ns.cloudflare.com ⭐
NSnina.ns.cloudflare.com
MXsmtp.secureserver.net ⭐
A216.69.141.71🇺🇸 AS398101216.69.140.0/22
A216.69.141.84🇺🇸 AS398101216.69.140.0/22
A216.69.141.113🇺🇸 AS398101216.69.140.0/22
MXmailstore1.secureserver.net(10)
A216.69.141.78🇺🇸 AS398101216.69.140.0/22
A216.69.141.114🇺🇸 AS398101216.69.140.0/22
A216.69.141.162🇺🇸 AS398101216.69.140.0/22
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4104.21.25.33, 172.67.222.74
IPv62606:4700:3031::ac43:de4a, 2606:4700:3035::6815:1921
SOAian.ns.cloudflare.comdns@cloudflare.com serial=2396871874

co

DNSSEC🔒 Signed (DS record present)
NSns0.centralnic.net ⭐
NSa.registrydns.co 🔒
NSb.registrydns.co 🔒
NSc.registrydns.co 🔒
NSd.registrydns.co 🔒
SOAns0.centralnic.nethostmaster@centralnic.net serial=1759588016

Up

cloudflareschool.startupclass.co

Same first word

startupclass.co
startupclass.at

DNS History

12 records (8 active, 4 former)

2017201820192020202120222023202420252026NSian.ns.cloudflare.comnina.ns.cloudflare.comMXmailstore1.secureserver.netsmtp.secureserver.netA104.21.25.33172.67.222.742606:4700:3031::ac43:de4a2606:4700:3035::6815:1921104.31.90.6104.31.91.62400:cb00:2048:1::681f:5a062400:cb00:2048:1::681f:5b06
●NSian.ns.cloudflare.com2016-12-05 → 2026-02-25 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-25 04:54:20
●NSnina.ns.cloudflare.com2016-12-05 → 2026-02-25 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-25 04:54:20
●MXmailstore1.secureserver.net2016-12-05 → 2026-02-25 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-25 04:54:20
●MXsmtp.secureserver.net2016-12-05 → 2026-02-25 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-25 04:54:20
●A104.21.25.332026-02-24 → 2026-02-25 · 3 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
● 2026-02-25 04:54:20
○A104.31.90.62016-12-05 → 2016-12-28 · 4 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○ 2026-02-25 04:54:20
○A104.31.91.62016-12-05 → 2016-12-28 · 4 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○ 2026-02-25 04:54:20
●A172.67.222.742026-02-24 → 2026-02-25 · 3 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
● 2026-02-25 04:54:20
○A2400:cb00:2048:1::681f:5a062016-12-05 → 2016-12-28 · 4 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○ 2026-02-25 04:54:20
○A2400:cb00:2048:1::681f:5b062016-12-05 → 2016-12-28 · 4 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○ 2026-02-25 04:54:20
●A2606:4700:3031::ac43:de4a2026-02-24 → 2026-02-25 · 3 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
● 2026-02-25 04:54:20
●A2606:4700:3035::6815:19212026-02-24 → 2026-02-25 · 3 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
● 2026-02-25 04:54:20

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coa.registrydns.co, c.registrydns.co, b.registrydns.co, d.registrydns.co-
startupclass.coian.ns.cloudflare.com, nina.ns.cloudflare.com-

✅ Authoritative Response

Server: 108.162.192.136

NS records: ian.ns.cloudflare.com, nina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for startupclass.co (unsigned zone)

⏱️ Timing

Total: 845ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.222.74, 104.21.25.33
AAAA22606:4700:3035::6815:1921, 2606:4700:3031::ac43:de4a
NS2ian.ns.cloudflare.com, nina.ns.cloudflare.com
MX2smtp.secureserver.net (pri: 0), mailstore1.secureserver.net (pri: 10)
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1ian.ns.cloudflare.com dns.cloudflare.com

AI analysis

cloudflareschool.startupclass.co has startupclass.co as its parent.

startupclass.co maps to four IP numbers: 2606:4700:3031::ac43:de4a, 2606:4700:3035::6815:1921, 104.21.25.33 and 172.67.222.74.

Two name servers ian.ns.cloudflare.com and nina.ns.cloudflare.com are delegated to startupclass.co.

Two mail servers handle startupclass.co: mailstore1.secureserver.net and smtp.secureserver.net.

Host names with three IP numbers:

mailstore1.secureserver.net points to 216.69.141.78, 216.69.141.114 and 216.69.141.162; smtp.secureserver.net points to 216.69.141.71, 216.69.141.84 and 216.69.141.113.