groupstudy.app - robtex.com

groupstudy.app

DNSSEC⚠️ Not signed
A2606:4700:3035::ac43:d826🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A2606:4700:3036::6815:3306🇺🇸 Cloudflare2606:4700:3036::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A104.21.51.6Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
A172.67.216.38🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints
NStina.ns.cloudflare.com ⭐
A2606:4700:50::adf5:3ae6🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtina.ns.cloudflare.com
A2803:f800:50::6ca2:c0e6🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRtina.ns.cloudflare.com
A2a06:98c1:50::ac40:20e6🇺🇸 Cloudflare2a06:98c1:50::/45
PTRtina.ns.cloudflare.com
A108.162.192.230🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtina.ns.cloudflare.com
A172.64.32.230🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtina.ns.cloudflare.com
A173.245.58.230🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtina.ns.cloudflare.com
NStony.ns.cloudflare.com
A2606:4700:58::adf5:3bf0🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtony.ns.cloudflare.com
A2803:f800:50::6ca2:c1f0🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L
PTRtony.ns.cloudflare.com
A2a06:98c1:50::ac40:21f0🇺🇸 Cloudflare2a06:98c1:50::/45
PTRtony.ns.cloudflare.com
A108.162.193.240🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtony.ns.cloudflare.com
A172.64.33.240🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtony.ns.cloudflare.com
A173.245.59.240🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US
PTRtony.ns.cloudflare.com
HTTPSHTTP/3, HTTP/2 ✓ hints match
IPv4 hints104.21.51.6, 172.67.216.38
IPv6 hints2606:4700:3035::ac43:d826, 2606:4700:3036::6815:3306
ECHX25519, HKDF-SHA256 + AES-128-GCM draft, id=33, name=cloudflare-ech.com
SOAtina.ns.cloudflare.comdns@cloudflare.com serial=2411498545

app

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=101427
🔒 HSTS Preload (+subdomains)

Same first word

groupstudy.app
groupstudy.com
groupstudy.org

Similar names

studygroup.com
studygroup.co.uk
studygroup.ac.uk
studygroup.gr
studygroup.co
studygroup.edu.au
studygroup.com.au
studygroup.in
dugupstory.com
studygroup.biz
studygroup.net
studygroup.org.uk
studygroup.org
studygroup.de
studygroup.info
stuydgroup.com
studygroup.us

DNS History

10 records (6 active, 4 former)

NStina.ns.cloudflare.comtony.ns.cloudflare.comA104.21.51.6172.67.216.382606:4700:3035::ac43:d8262606:4700:3036::6815:3306188.114.96.0188.114.97.02a06:98c1:3120::2a06:98c1:3121::
●NStina.ns.cloudflare.com2026-08-10 → 2026-08-12 · 2 obs
● 2026-08-10 10:23:20
● 2026-08-12 16:54:30
●NStony.ns.cloudflare.com2026-08-10 → 2026-08-12 · 2 obs
● 2026-08-10 10:23:20
● 2026-08-12 16:54:30
●A104.21.51.62026-08-12 → 2026-08-12 · 2 obs
○ 2026-08-10 10:23:20
● 2026-08-12 16:54:30
●A172.67.216.382026-08-12 → 2026-08-12 · 2 obs
○ 2026-08-10 10:23:20
● 2026-08-12 16:54:30
○A188.114.96.02026-08-10 → 2026-08-10 · 2 obs
● 2026-08-10 10:23:20
○ 2026-08-12 16:54:30
○A188.114.97.02026-08-10 → 2026-08-10 · 2 obs
● 2026-08-10 10:23:20
○ 2026-08-12 16:54:30
●A2606:4700:3035::ac43:d8262026-08-12 → 2026-08-12 · 2 obs
○ 2026-08-10 10:23:20
● 2026-08-12 16:54:30
●A2606:4700:3036::6815:33062026-08-12 → 2026-08-12 · 2 obs
○ 2026-08-10 10:23:20
● 2026-08-12 16:54:30
○A2a06:98c1:3120::2026-08-10 → 2026-08-10 · 2 obs
● 2026-08-10 10:23:20
○ 2026-08-12 16:54:30
○A2a06:98c1:3121::2026-08-10 → 2026-08-10 · 2 obs
● 2026-08-10 10:23:20
○ 2026-08-12 16:54:30

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
appns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...-
groupstudy.apptony.ns.cloudflare.com, tina.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.240

NS records: tony.ns.cloudflare.com, tina.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for groupstudy.app (unsigned zone)

⏱️ Timing

Total: 599ms | Queries: -

📄 Records

TypeCountSample Data
A2172.67.216.38, 104.21.51.6
AAAA22606:4700:3036::6815:3306, 2606:4700:3035::ac43:d826
NS2tina.ns.cloudflare.com, tony.ns.cloudflare.com
HTTPS1{"priority":1,"target":".","alpn":["h3",
SOA1tina.ns.cloudflare.com dns.cloudflare.co

Analysis

IP Addresses

groupstudy.app resolves to four IP addresses: 104.21.51.6, 172.67.216.38, 2606:4700:3035::ac43:d826 and 2606:4700:3036::6815:3306.

Among the host names that share IP numbers with groupstudy.app are uncommonloot.com, web.ism.edu, titolsvagh.pro and two others.

Name Servers

groupstudy.app uses two name servers for its delegation: tina.ns.cloudflare.com and tony.ns.cloudflare.com.

groupstudy.app has the same name server delegation as a number of other domains, such as 660guitars.com, yallagoool1.com, fidalveneto.com and two more.

groupstudy.app has at least partial name server overlap with other domains, such as scentzonebd.com, inboxsdk.com, nxportal.shop and two others.

It is common to find these name servers paired with the name servers samara.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

Hostname tina.ns.cloudflare.com directs to 108.162.192.230, 172.64.32.230 and 173.245.58.230 along with 3 other IP addresses.

Hostname tony.ns.cloudflare.com directs to 108.162.193.240, 172.64.33.240 and 173.245.59.240 along with 3 other IP addresses.