studycs.org - dns.ninja

`studycs.org`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:ca2b^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:2509^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.37.9^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.202.43^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`alla.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a3e^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alla.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c03e^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`alla.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:203e^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`alla.ns.cloudflare.com`
		A	108.162.192.62^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alla.ns.cloudflare.com`
		A	172.64.32.62^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alla.ns.cloudflare.com`
		A	173.245.58.62^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`alla.ns.cloudflare.com`
NS	`george.ns.cloudflare.com`
		A	2606:4700:58::adf5:3ba7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c1a7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`george.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:21a7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`george.ns.cloudflare.com`
		A	108.162.193.167^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	172.64.33.167^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
		A	173.245.59.167^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`george.ns.cloudflare.com`
MX	`_dc-mx.bd5ab5672436.studycs.org` ⭐
		A	216.137.189.167^{🇺🇸 A2HOSTING216.137.188.0/22 A2 Hosting, Inc.}
			PTR	`server.studycs.org`
TXT	`google-site-verification=qx4lav5ymkTjJHVbbUUKCO6S1jXWkh-EXNUovMZWJE8`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.37.9, 172.67.202.43
		IPv6 hints	2606:4700:3033::ac43:ca2b, 2606:4700:3035::6815:2509
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=85, name=cloudflare-ech.com
SOA	`alla.ns.cloudflare.com`dns@cloudflare.com serial=2405008902

`org`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a0.org.afilias-nst.info` ⭐ ⚠️ Not in parent delegation
	NS	`a2.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`b0.org.afilias-nst.org`
	NS	`b2.org.afilias-nst.org`
	NS	`c0.org.afilias-nst.info` ⚠️ Not in parent delegation
	NS	`d0.org.afilias-nst.org`
	SOA	`a0.org.afilias-nst.info`hostmaster@donuts.email serial=1782654253

Same first word

studycs.com

studycs.org

Similar names

csstudy.com

studysc.com

tducsys.id.vn

csstudy.net

studysc.org

csstudy.gov.cn

studysc.com.cn

scstudy.site

DNS History

22 records (7 active, 15 former)

●NSalla.ns.cloudflare.com2019-01-23 → 2026-06-28 · 2 obs

● 2019-01-23 18:52:20
● 2026-06-28 13:59:10

●NSgeorge.ns.cloudflare.com2019-01-23 → 2026-06-28 · 2 obs

● 2019-01-23 18:52:20
● 2026-06-28 13:59:10

●MX_dc-mx.bd5ab5672436.studycs.org2026-02-27 → 2026-06-28 · 3 obs

○ 2019-01-23 18:52:20
● 2026-02-27 07:13:28
● 2026-06-28 13:59:10

○MXalt1.aspmx.l.google.com2019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○MXalt2.aspmx.l.google.com2019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○MXalt3.aspmx.l.google.com2019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○MXalt4.aspmx.l.google.com2019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○MXaspmx.l.google.com2019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

●A104.21.37.92026-02-27 → 2026-06-28 · 11 obs

○ 2019-01-23 18:52:20
● 2026-02-27 07:13:28
○ 2026-03-05 09:44:28
○ 2026-03-15 19:49:48
● 2026-03-30 09:24:44
● 2026-04-10 16:33:18
○ 2026-04-21 18:41:12
● 2026-04-24 11:54:44
● 2026-04-24 18:42:58
○ 2026-05-06 05:01:50
● 2026-06-28 13:59:10

○A104.31.90.812019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○A104.31.91.812019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

●A172.67.202.432026-02-27 → 2026-06-28 · 11 obs

○A188.114.96.02026-03-05 → 2026-05-06 · 10 obs

○ 2026-02-27 07:13:28
● 2026-03-05 09:44:28
● 2026-03-15 19:49:48
○ 2026-03-30 09:24:44
○ 2026-04-10 16:33:18
● 2026-04-21 18:41:12
○ 2026-04-24 11:54:44
○ 2026-04-24 18:42:58
● 2026-05-06 05:01:50
○ 2026-06-28 13:59:10

○A188.114.97.02026-03-05 → 2026-05-06 · 10 obs

○A2606:4700:30::681f:5a512019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

○A2606:4700:30::681f:5b512019-01-23 → 2019-01-23 · 3 obs

● 2019-01-23 18:52:20
○ 2026-02-27 07:13:28
○ 2026-06-28 13:59:10

●A2606:4700:3033::ac43:ca2b2026-06-28 → 2026-06-28 · 2 obs

○ 2026-05-06 05:01:50
● 2026-06-28 13:59:10

○A2606:4700:3034::6815:25092026-02-27 → 2026-04-24 · 11 obs

●A2606:4700:3035::6815:25092026-06-28 → 2026-06-28 · 2 obs

○ 2026-05-06 05:01:50
● 2026-06-28 13:59:10

○A2606:4700:3037::ac43:ca2b2026-02-27 → 2026-04-24 · 11 obs

○A2a06:98c1:3120::2026-03-05 → 2026-05-06 · 10 obs

○A2a06:98c1:3121::2026-03-05 → 2026-05-06 · 10 obs

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
org	b0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org	-
studycs.org	george.ns.cloudflare.com, alla.ns.cloudflare.com	-

✅ Authoritative Response

Server:172.64.33.167

NS records: george.ns.cloudflare.com, alla.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for studycs.org (unsigned zone)

⏱️ Timing

Total: 597ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.202.43, 104.21.37.9`
AAAA	2	`2606:4700:3035::6815:2509, 2606:4700:3033::ac43:ca2b`
NS	2	`alla.ns.cloudflare.com, george.ns.cloudflare.com`
MX	1	`_dc-mx.bd5ab5672436.studycs.org (pri: 0)`
TXT	1	`google-site-verification=qx4lav5ymkTjJHV`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`alla.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

studycs.org directs to four IP numbers, which are 104.21.37.9, 172.67.202.43, 2606:4700:3033::ac43:ca2b and 2606:4700:3035::6815:2509.

Additional host names — www.tommeyers.com, lawair.nl, calidra.com and two others — share IP numbers with studycs.org.

Name Servers

The NS records for studycs.org delegate to alla.ns.cloudflare.com and george.ns.cloudflare.com.

studycs.org shares its name server setup with other domains, including zobows.com, denmat.tv, mydenmat.com and two others.

The name servers of studycs.org overlap at least partially with those of other domains — among them marimoon.click, logicproperty.group, alager.ru and two more.

These name servers commonly appear in combination with the name servers keanu.ns.cloudflare.com.

Host names with 6 IP numbers:

alla.ns.cloudflare.com maps to 108.162.192.62, 172.64.32.62, 173.245.58.62 and 3 additional IP addresses.

george.ns.cloudflare.com maps to 108.162.193.167, 172.64.33.167, 173.245.59.167 and 3 additional IP addresses.

Mail Servers

studycs.org has one mail server: _dc-mx.bd5ab5672436.studycs.org.

_dc-mx.bd5ab5672436.studycs.org resolves to 216.137.189.167 and no other IP number.