`zdstudy.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3030::ac43:d68f^{🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:3b34^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.59.52^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.214.143^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`lisa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a83^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c083^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`lisa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2083^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`lisa.ns.cloudflare.com`
		A	108.162.192.131^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	172.64.32.131^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
		A	173.245.58.131^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`lisa.ns.cloudflare.com`
NS	`max.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b84^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`max.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c184^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`max.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2184^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`max.ns.cloudflare.com`
		A	108.162.193.132^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	172.64.33.132^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
		A	173.245.59.132^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.59.52, 172.67.214.143
		IPv6 hints	2606:4700:3030::ac43:d68f, 2606:4700:3037::6815:3b34
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=181, name=cloudflare-ech.com
SOA	`lisa.ns.cloudflare.com`dns@cloudflare.com serial=2409490274

`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=1784695662

Same first word

zdstudy.com

Similar names

dzstudy.com

studyzd.cn

DNS History

17 records (6 active, 11 former)

○NSa.share-dns.com2026-04-07 → 2026-07-22 · 2 obs

○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

○NSb.share-dns.net2026-04-07 → 2026-07-22 · 2 obs

○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

●NSlisa.ns.cloudflare.com2026-04-07 → 2026-07-22 · 3 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
● 2026-07-22 04:52:04

○NSmain2.ns365.net2016-12-17 → 2016-12-17 · 3 obs

● 2016-12-17 01:16:32
○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

●NSmax.ns.cloudflare.com2026-04-07 → 2026-07-22 · 3 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
● 2026-07-22 04:52:04

○NSns5.gzidc.com2016-12-17 → 2016-12-17 · 3 obs

● 2016-12-17 01:16:32
○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

○NSns6.gzidc.com2016-12-17 → 2016-12-17 · 3 obs

● 2016-12-17 01:16:32
○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

●A104.21.59.522026-04-07 → 2026-07-22 · 5 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
○ 2026-04-30 19:25:48
● 2026-06-28 14:31:10
● 2026-07-22 04:52:04

○A124.172.139.332016-12-17 → 2016-12-17 · 3 obs

● 2016-12-17 01:16:32
○ 2026-04-07 19:32:40
○ 2026-07-22 04:52:04

●A172.67.214.1432026-04-07 → 2026-07-22 · 5 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
○ 2026-04-30 19:25:48
● 2026-06-28 14:31:10
● 2026-07-22 04:52:04

○A188.114.96.02026-04-30 → 2026-04-30 · 4 obs

○ 2026-04-07 19:32:40
● 2026-04-30 19:25:48
○ 2026-06-28 14:31:10
○ 2026-07-22 04:52:04

○A188.114.97.02026-04-30 → 2026-04-30 · 4 obs

○ 2026-04-07 19:32:40
● 2026-04-30 19:25:48
○ 2026-06-28 14:31:10
○ 2026-07-22 04:52:04

●A2606:4700:3030::ac43:d68f2026-07-07 → 2026-07-22 · 3 obs

○ 2026-06-28 14:31:10
● 2026-07-07 20:41:52
● 2026-07-22 04:52:04

○A2606:4700:3035::ac43:d68f2026-04-07 → 2026-06-28 · 6 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
○ 2026-04-30 19:25:48
● 2026-06-28 14:31:10
○ 2026-07-07 20:41:52
○ 2026-07-22 04:52:04

●A2606:4700:3037::6815:3b342026-04-07 → 2026-07-22 · 5 obs

○ 2016-12-17 01:16:32
● 2026-04-07 19:32:40
○ 2026-04-30 19:25:48
● 2026-06-28 14:31:10
● 2026-07-22 04:52:04

○A2a06:98c1:3120::2026-04-30 → 2026-04-30 · 4 obs

○ 2026-04-07 19:32:40
● 2026-04-30 19:25:48
○ 2026-06-28 14:31:10
○ 2026-07-22 04:52:04

○A2a06:98c1:3121::2026-04-30 → 2026-04-30 · 4 obs

○ 2026-04-07 19:32:40
● 2026-04-30 19:25:48
○ 2026-06-28 14:31:10
○ 2026-07-22 04:52:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
zdstudy.com	lisa.ns.cloudflare.com, max.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:172.64.33.132

NS records: lisa.ns.cloudflare.com, max.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for zdstudy.com (unsigned zone)

⏱️ Timing

Total: 127ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.214.143, 104.21.59.52`
AAAA	2	`2606:4700:3030::ac43:d68f, 2606:4700:3037::6815:3b34`
NS	2	`lisa.ns.cloudflare.com, max.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`lisa.ns.cloudflare.com dns.cloudflare.co`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

zdstudy.com points to the four IP addresses 104.21.59.52, 172.67.214.143, 2606:4700:3030::ac43:d68f and 2606:4700:3037::6815:3b34.

Among the host names that share IP numbers with zdstudy.com are orthometrics.com, palette-pellets.be, hookerdeerdrag.com and two others.

Name Servers

DNS delegation for zdstudy.com points to two name servers: lisa.ns.cloudflare.com and max.ns.cloudflare.com.

zdstudy.com has the same name server delegation as a number of other domains, such as xdad56.com, kurand.com, irvbriscoe.com and two more.

There is at least partial name server overlap between zdstudy.com and other domains — ln-wrgd.com, californiapartnership.org, quickstartguides.com and two more among them.

These name servers are routinely deployed together with the name servers ken.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

lisa.ns.cloudflare.com has IP addresses 108.162.192.131, 172.64.32.131 and 173.245.58.131, plus 3 other.

max.ns.cloudflare.com has IP addresses 108.162.193.132, 172.64.33.132 and 173.245.59.132, plus 3 other.

zdstudy.com - robtex.com

zdstudy.com

com

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

📌 Glue Records Collected

Analysis

IP Addresses

Name Servers

`zdstudy.com`

`com`