`cert-prep.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:b451^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::6815:3043^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.48.67^{Cloudflare104.21.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.180.81^{🇺🇸 Cloudflare172.67.176.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`anastasia.ns.cloudflare.com` ⭐
		A	2606:4700:50::a29f:26e3^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`anastasia.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c2e3^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`anastasia.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:22e3^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`anastasia.ns.cloudflare.com`
		A	108.162.194.227^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`anastasia.ns.cloudflare.com`
		A	162.159.38.227^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`anastasia.ns.cloudflare.com`
		A	172.64.34.227^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`anastasia.ns.cloudflare.com`
NS	`ed.ns.cloudflare.com`
		A	2606:4700:58::adf5:3b6f^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ed.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c16f^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`ed.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:216f^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`ed.ns.cloudflare.com`
		A	108.162.193.111^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ed.ns.cloudflare.com`
		A	172.64.33.111^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ed.ns.cloudflare.com`
		A	173.245.59.111^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`ed.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.48.67, 172.67.180.81
		IPv6 hints	2606:4700:3033::ac43:b451, 2606:4700:3034::6815:3043
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=24, name=cloudflare-ech.com
SOA	`anastasia.ns.cloudflare.com`dns@cloudflare.com serial=2407157316

`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=1784620012

Previously MX for

cert-prep.com

Same first word

cert-prep.com

DNS History

16 records (6 active, 10 former)

●NSanastasia.ns.cloudflare.com2026-03-13 → 2026-07-21 · 3 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-07-21 07:55:28

●NSed.ns.cloudflare.com2026-03-13 → 2026-07-21 · 3 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-07-21 07:55:28

○NSns931.websitewelcome.com2015-05-20 → 2016-07-23 · 4 obs

● 2015-05-20 20:11:26
● 2016-07-23 11:39:46
○ 2017-10-18 21:05:42
○ 2026-07-21 07:55:28

○NSns932.websitewelcome.com2015-05-20 → 2016-07-23 · 4 obs

● 2015-05-20 20:11:26
● 2016-07-23 11:39:46
○ 2017-10-18 21:05:42
○ 2026-07-21 07:55:28

○MXcert-prep.com2015-05-20 → 2016-07-23 · 4 obs

● 2015-05-20 20:11:26
● 2016-07-23 11:39:46
○ 2017-10-18 21:05:42
○ 2026-07-21 07:55:28

●A104.21.48.672026-03-13 → 2026-07-21 · 8 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-04-13 14:03:58
○ 2026-04-24 06:07:20
○ 2026-05-01 11:15:08
● 2026-06-13 02:00:50
○ 2026-06-15 11:48:14
● 2026-07-21 07:55:28

●A172.67.180.812026-03-13 → 2026-07-21 · 8 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-04-13 14:03:58
○ 2026-04-24 06:07:20
○ 2026-05-01 11:15:08
● 2026-06-13 02:00:50
○ 2026-06-15 11:48:14
● 2026-07-21 07:55:28

○A188.114.96.02026-04-24 → 2026-06-15 · 6 obs

○ 2026-04-13 14:03:58
● 2026-04-24 06:07:20
● 2026-05-01 11:15:08
○ 2026-06-13 02:00:50
● 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

○A188.114.97.02026-04-24 → 2026-06-15 · 6 obs

○ 2026-04-13 14:03:58
● 2026-04-24 06:07:20
● 2026-05-01 11:15:08
○ 2026-06-13 02:00:50
● 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

○A192.185.194.1362015-05-20 → 2016-07-23 · 4 obs

● 2015-05-20 20:11:26
● 2016-07-23 11:39:46
○ 2017-10-18 21:05:42
○ 2026-07-21 07:55:28

○A2606:4700:3030::ac43:b4512026-03-13 → 2026-06-13 · 8 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-04-13 14:03:58
○ 2026-04-24 06:07:20
○ 2026-05-01 11:15:08
● 2026-06-13 02:00:50
○ 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

●A2606:4700:3033::ac43:b4512026-07-21 → 2026-07-21 · 2 obs

○ 2026-06-15 11:48:14
● 2026-07-21 07:55:28

●A2606:4700:3034::6815:30432026-07-21 → 2026-07-21 · 2 obs

○ 2026-06-15 11:48:14
● 2026-07-21 07:55:28

○A2606:4700:3035::6815:30432026-03-13 → 2026-06-13 · 8 obs

○ 2017-10-18 21:05:42
● 2026-03-13 09:38:50
● 2026-04-13 14:03:58
○ 2026-04-24 06:07:20
○ 2026-05-01 11:15:08
● 2026-06-13 02:00:50
○ 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

○A2a06:98c1:3120::2026-04-24 → 2026-06-15 · 6 obs

○ 2026-04-13 14:03:58
● 2026-04-24 06:07:20
● 2026-05-01 11:15:08
○ 2026-06-13 02:00:50
● 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

○A2a06:98c1:3121::2026-04-24 → 2026-06-15 · 6 obs

○ 2026-04-13 14:03:58
● 2026-04-24 06:07:20
● 2026-05-01 11:15:08
○ 2026-06-13 02:00:50
● 2026-06-15 11:48:14
○ 2026-07-21 07:55:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	c.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, j.gtld-servers.net...	-
cert-prep.com	ed.ns.cloudflare.com, anastasia.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.194.227

NS records: ed.ns.cloudflare.com, anastasia.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cert-prep.com (unsigned zone)

⏱️ Timing

Total: 359ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.180.81, 104.21.48.67`
AAAA	2	`2606:4700:3034::6815:3043, 2606:4700:3033::ac43:b451`
NS	2	`anastasia.ns.cloudflare.com, ed.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`anastasia.ns.cloudflare.com dns.cloudfla`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

cert-prep.com directs to four IP numbers, which are 104.21.48.67, 172.67.180.81, 2606:4700:3033::ac43:b451 and 2606:4700:3034::6815:3043.

Additional host names — sdhaoyang.net, dcmgroup.ca, daedalus-ug.de and two others — share IP numbers with cert-prep.com.

Name Servers

cert-prep.com has two authoritative name servers — anastasia.ns.cloudflare.com and ed.ns.cloudflare.com.

cert-prep.com shares its name server setup with other domains, including gmetrix.dev, battertech.com, fusiontomo.com and two others.

The name servers of cert-prep.com overlap at least partially with those of other domains — among them chcetoprzezyc.pl, luhangairbagfender.com, ceritamu.com and two more.

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

Host names with 6 IP numbers:

anastasia.ns.cloudflare.com points to 108.162.194.227, 162.159.38.227, 172.64.34.227 and 3 other IP addresses.

ed.ns.cloudflare.com points to 108.162.193.111, 172.64.33.111, 173.245.59.111 and 3 other IP addresses.

cert-prep.com - robtex.com

cert-prep.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

`cert-prep.com`

`com`