startupclass.co - robtex.com

startupclass.co

DNSSEC⚠️ Not signed
A2606:4700:3031::ac43:de4a🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3035::6815:1921🇺🇸 Cloudflare2606:4700:3035::/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
A172.67.222.74🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NSian.ns.cloudflare.com ⭐
A2606:4700:58::adf5:3b76🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRian.ns.cloudflare.com
A2803:f800:50::6ca2:c176🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRian.ns.cloudflare.com
A2a06:98c1:50::ac40:2176🇺🇸 Cloudflare2a06:98c1:50::/45
PTRian.ns.cloudflare.com
A108.162.193.118🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRian.ns.cloudflare.com
A172.64.33.118🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRian.ns.cloudflare.com
A173.245.59.118🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRian.ns.cloudflare.com
NSnina.ns.cloudflare.com
A2606:4700:50::adf5:3a88🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnina.ns.cloudflare.com
A2803:f800:50::6ca2:c088🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRnina.ns.cloudflare.com
A2a06:98c1:50::ac40:2088🇺🇸 Cloudflare2a06:98c1:50::/45
PTRnina.ns.cloudflare.com
A108.162.192.136🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnina.ns.cloudflare.com
A172.64.32.136🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnina.ns.cloudflare.com
A173.245.58.136🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRnina.ns.cloudflare.com
MXsmtp.secureserver.net ⭐
A216.69.141.71🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp01-v01.prod.phx3.secureserver.net
A216.69.141.84🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp02-v01.prod.phx3.secureserver.net
A216.69.141.113🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp03-v01.prod.phx3.secureserver.net
MXmailstore1.secureserver.net(10)
A216.69.141.78🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp01-v02.prod.phx3.secureserver.net
A216.69.141.114🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp03-v02.prod.phx3.secureserver.net
A216.69.141.162🇺🇸 AS398101216.69.140.0/22
PTRosplibsmtp02-v02.prod.phx3.secureserver.net
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 → 2026-02-24 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-24 20:37:46
●NSnina.ns.cloudflare.com2016-12-05 → 2026-02-24 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-24 20:37:46
●MXmailstore1.secureserver.net2016-12-05 → 2026-02-24 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-24 20:37:46
●MXsmtp.secureserver.net2016-12-05 → 2026-02-24 · 2 obs
● 2016-12-05 02:01:30
● 2026-02-24 20:37:46
●A104.21.25.332026-02-24 → 2026-02-24 · 2 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
○A104.31.90.62016-12-05 → 2016-12-28 · 3 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○A104.31.91.62016-12-05 → 2016-12-28 · 3 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
●A172.67.222.742026-02-24 → 2026-02-24 · 2 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
○A2400:cb00:2048:1::681f:5a062016-12-05 → 2016-12-28 · 3 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
○A2400:cb00:2048:1::681f:5b062016-12-05 → 2016-12-28 · 3 obs
● 2016-12-05 02:01:30
● 2016-12-28 00:08:50
○ 2026-02-24 20:37:46
●A2606:4700:3031::ac43:de4a2026-02-24 → 2026-02-24 · 2 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46
●A2606:4700:3035::6815:19212026-02-24 → 2026-02-24 · 2 obs
○ 2016-12-28 00:08:50
● 2026-02-24 20:37:46

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
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: 89ms | Queries: -

📄 Records

TypeCountSample Data
A2104.21.25.33, 172.67.222.74
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.

Other host names, for instance www.underground-review.com, siti-web-perugia.it, 96210b816421.sabung-ayam-online.com, mech.xyz and hepgezelim.com share IP numbers with startupclass.co.

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

startupclass.co uses the same name server configuration as other domains, such as bw2cloud.com, intellibot.fr, watchestent.com, paiement-securise.fr and pressclubbg.com.

startupclass.co at least partially shares name servers with other domains such as hoctiengnhatquaphim.com, breakinggroundgreenroof.com, kasem.info, freespace.by and segurosmotosonline.com.

these name servers are commonly used with the name servers lily.ns.cloudflare.com.

Host names with six IP numbers: Host name ian.ns.cloudflare.com points to 2606:4700:58::adf5:3b76, 2803:f800:50::6ca2:c176, 2a06:98c1:50::ac40:2176, 108.162.193.118, 172.64.33.118 and 173.245.59.118; host name nina.ns.cloudflare.com points to 2606:4700:50::adf5:3a88, 2803:f800:50::6ca2:c088, 2a06:98c1:50::ac40:2088, 108.162.192.136, 172.64.32.136 and 173.245.58.136.

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

startupclass.co shares the same mail server setup as other domains, including aircompressorenergy.biz, brakemax.biz, dssroad.com, figmentphotography.com and crodas.org.

startupclass.co shares some mail servers with other domains, at least partially, for instance watchpointvideo.com.

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.