`letzstudy.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:ceb3^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:4d67^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.77.103^{Cloudflare104.21.64.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.206.179^{🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`iris.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a76^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`iris.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c076^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`iris.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2076^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`iris.ns.cloudflare.com`
		A	108.162.192.118^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`iris.ns.cloudflare.com`
		A	172.64.32.118^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`iris.ns.cloudflare.com`
		A	173.245.58.118^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`iris.ns.cloudflare.com`
NS	`stanley.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c8d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c38d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`stanley.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:238d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`stanley.ns.cloudflare.com`
		A	108.162.195.141^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	162.159.44.141^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
		A	172.64.35.141^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`stanley.ns.cloudflare.com`
MX	`smtp.secureserver.net` ⭐
		A	216.69.141.71^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp01-v01.prod.phx3.secureserver.net`
		A	216.69.141.84^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp02-v01.prod.phx3.secureserver.net`
		A	216.69.141.113^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp03-v01.prod.phx3.secureserver.net`
MX	`mailstore1.secureserver.net`⁽¹⁰⁾
		A	216.69.141.78^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp01-v02.prod.phx3.secureserver.net`
		A	216.69.141.114^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp03-v02.prod.phx3.secureserver.net`
		A	216.69.141.162^{🇺🇸 AS398101216.69.140.0/22}
			PTR	`osplibsmtp02-v02.prod.phx3.secureserver.net`
TXT	`D3650650`
TXT	`v=spf1 include:secureserver.net -all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.77.103, 172.67.206.179
		IPv6 hints	2606:4700:3031::ac43:ceb3, 2606:4700:3035::6815:4d67
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=3, name=cloudflare-ech.com
SOA	`iris.ns.cloudflare.com`dns@cloudflare.com serial=2410614542

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1785954544

Previously MX for

letzstudy.com

Same first word

letzstudy.com

DNS History

16 records (8 active, 8 former)

●NSiris.ns.cloudflare.com2026-07-28 → 2026-08-05 · 3 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
● 2026-08-05 18:36:42

○NSns801.globehost.org2018-07-17 → 2018-07-17 · 3 obs

● 2018-07-17 23:59:06
○ 2026-07-28 02:30:08
○ 2026-08-05 18:36:42

○NSns802.globehost.org2018-07-17 → 2018-07-17 · 3 obs

● 2018-07-17 23:59:06
○ 2026-07-28 02:30:08
○ 2026-08-05 18:36:42

●NSstanley.ns.cloudflare.com2026-07-28 → 2026-08-05 · 3 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
● 2026-08-05 18:36:42

○MXletzstudy.com2018-07-17 → 2018-07-17 · 3 obs

● 2018-07-17 23:59:06
○ 2026-07-28 02:30:08
○ 2026-08-05 18:36:42

●MXmailstore1.secureserver.net2026-07-28 → 2026-08-05 · 3 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
● 2026-08-05 18:36:42

●MXsmtp.secureserver.net2026-07-28 → 2026-08-05 · 3 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
● 2026-08-05 18:36:42

●A104.21.77.1032026-07-31 → 2026-08-05 · 3 obs

○ 2026-07-28 02:30:08
● 2026-07-31 07:56:38
● 2026-08-05 18:36:42

○A148.72.152.242018-07-17 → 2018-07-17 · 3 obs

● 2018-07-17 23:59:06
○ 2026-07-28 02:30:08
○ 2026-08-05 18:36:42

●A172.67.206.1792026-07-31 → 2026-08-05 · 3 obs

○ 2026-07-28 02:30:08
● 2026-07-31 07:56:38
● 2026-08-05 18:36:42

○A188.114.96.02026-07-28 → 2026-07-28 · 4 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
○ 2026-07-31 07:56:38
○ 2026-08-05 18:36:42

○A188.114.97.02026-07-28 → 2026-07-28 · 4 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
○ 2026-07-31 07:56:38
○ 2026-08-05 18:36:42

●A2606:4700:3031::ac43:ceb32026-07-31 → 2026-08-05 · 3 obs

○ 2026-07-28 02:30:08
● 2026-07-31 07:56:38
● 2026-08-05 18:36:42

●A2606:4700:3035::6815:4d672026-07-31 → 2026-08-05 · 3 obs

○ 2026-07-28 02:30:08
● 2026-07-31 07:56:38
● 2026-08-05 18:36:42

○A2a06:98c1:3120::2026-07-28 → 2026-07-28 · 4 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
○ 2026-07-31 07:56:38
○ 2026-08-05 18:36:42

○A2a06:98c1:3121::2026-07-28 → 2026-07-28 · 4 obs

○ 2018-07-17 23:59:06
● 2026-07-28 02:30:08
○ 2026-07-31 07:56:38
○ 2026-08-05 18:36:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	k.gtld-servers.net, l.gtld-servers.net, h.gtld-servers.net, i.gtld-servers.net...	-
letzstudy.com	iris.ns.cloudflare.com, stanley.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.141

NS records: iris.ns.cloudflare.com, stanley.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for letzstudy.com (unsigned zone)

⏱️ Timing

Total: 203ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.77.103, 172.67.206.179`
AAAA	2	`2606:4700:3031::ac43:ceb3, 2606:4700:3035::6815:4d67`
NS	2	`iris.ns.cloudflare.com, stanley.ns.cloudflare.com`
MX	2	`smtp.secureserver.net (pri: 0), mailstore1.secureserver.net (pri: 10)`
TXT	2	`D3650650, v=spf1 include:secureserver.net -all`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`iris.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

letzstudy.com directs to four IP numbers, which are 104.21.77.103, 172.67.206.179, 2606:4700:3031::ac43:ceb3 and 2606:4700:3035::6815:4d67.

Additional host names — www.usdtpay188.com, www.yoake.lu, www.dpd-cexlora.link and two others — share IP numbers with letzstudy.com.

Name Servers

letzstudy.com has two authoritative name servers — iris.ns.cloudflare.com and stanley.ns.cloudflare.com.

letzstudy.com shares its name server setup with other domains, including daphnescorner.com, fortistechnology.pl, olivue.com and two others.

At least some of letzstudy.com's name servers are shared with other domains, for example suka2cuci.org, u888com.co, premiere-heure.fr and two more.

These name servers tend to be used in conjunction with the name servers vida.ns.cloudflare.com.

Host names with 6 IP numbers:

iris.ns.cloudflare.com points to 108.162.192.118, 172.64.32.118, 173.245.58.118 and 3 other IP addresses.

stanley.ns.cloudflare.com points to 108.162.195.141, 162.159.44.141, 172.64.35.141 and 3 other IP addresses.

Mail Servers

letzstudy.com has two mail servers: mailstore1.secureserver.net and smtp.secureserver.net.

letzstudy.com shares the same mail server setup as other domains, including apcmm.com, sdevloop.com, autodonationoklahoma.com and two others.

At least a portion of letzstudy.com's mail servers are shared with other domains, among them kjgoetigheim.de and browncad.com.

The hosts mailstore1.secureserver.net and smtp.secureserver.net both resolve to three IP numbers: mailstore1.secureserver.net to 216.69.141.78, 216.69.141.114 and 216.69.141.162, and smtp.secureserver.net to 216.69.141.71, 216.69.141.84 and 216.69.141.113.

letzstudy.com - robtex.com

letzstudy.com

com

Previously MX for

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

Mail Servers

`letzstudy.com`

`com`