`certusstudymanager.com`

DNSSEC	⚠️ Not signed
A	2606:4700:3034::6815:5ee5^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3034::ac43:8ce0^{🇺🇸 Cloudflare2606:4700:3034::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.94.229^{Cloudflare104.21.80.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.140.224^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`asa.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3af6^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0f6^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`asa.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20f6^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`asa.ns.cloudflare.com`
		A	108.162.192.246^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	172.64.32.246^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
		A	173.245.58.246^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`asa.ns.cloudflare.com`
NS	`brady.ns.cloudflare.com`
		A	2606:4700:58::a29f:2cd7^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brady.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c3d7^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`brady.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:23d7^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`brady.ns.cloudflare.com`
		A	108.162.195.215^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brady.ns.cloudflare.com`
		A	162.159.44.215^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brady.ns.cloudflare.com`
		A	172.64.35.215^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`brady.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.94.229, 172.67.140.224
		IPv6	2606:4700:3034::6815:5ee5, 2606:4700:3034::ac43:8ce0
SOA	`asa.ns.cloudflare.com`dns@cloudflare.com serial=2399197706

`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=1774526022

Same first word

certusstudymanager.com

DNS History

18 records (6 active, 12 former)

●NSasa.ns.cloudflare.com2026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

●NSbrady.ns.cloudflare.com2026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

○NSns51.domaincontrol.com2015-06-26 → 2015-11-06 · 4 obs

● 2015-06-26 06:31:20
● 2015-11-06 00:45:58
○ 2016-02-04 08:34:28
○ 2026-03-26 12:11:52

○NSns52.domaincontrol.com2015-06-26 → 2015-11-06 · 4 obs

● 2015-06-26 06:31:20
● 2015-11-06 00:45:58
○ 2016-02-04 08:34:28
○ 2026-03-26 12:11:52

○NSpdns07.domaincontrol.com2016-02-04 → 2020-01-30 · 5 obs

○ 2015-11-06 00:45:58
● 2016-02-04 08:34:28
● 2020-01-30 17:57:58
○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○NSpdns08.domaincontrol.com2016-02-04 → 2020-01-30 · 5 obs

○ 2015-11-06 00:45:58
● 2016-02-04 08:34:28
● 2020-01-30 17:57:58
○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○MXmailstore1.secureserver.net2015-06-26 → 2020-01-30 · 4 obs

● 2015-06-26 06:31:20
● 2020-01-30 17:57:58
○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○MXsmtp.secureserver.net2015-06-26 → 2020-01-30 · 4 obs

● 2015-06-26 06:31:20
● 2020-01-30 17:57:58
○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

●A104.21.94.2292026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

●A172.67.140.2242026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

○A184.168.221.932016-02-04 → 2020-01-30 · 5 obs

○ 2015-11-06 00:45:58
● 2016-02-04 08:34:28
● 2020-01-30 17:57:58
○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○A188.114.96.02026-03-26 → 2026-03-26 · 2 obs

○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○A188.114.97.02026-03-26 → 2026-03-26 · 2 obs

○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

●A2606:4700:3034::6815:5ee52026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

●A2606:4700:3034::ac43:8ce02026-03-26 → 2026-03-26 · 3 obs

○ 2020-01-30 17:57:58
● 2026-03-26 12:11:48
● 2026-03-26 12:11:52

○A2a06:98c1:3120::2026-03-26 → 2026-03-26 · 2 obs

○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○A2a06:98c1:3121::2026-03-26 → 2026-03-26 · 2 obs

○ 2026-03-26 12:11:48
○ 2026-03-26 12:11:52

○A50.63.246.1682015-06-26 → 2015-11-06 · 4 obs

● 2015-06-26 06:31:20
● 2015-11-06 00:45:58
○ 2016-02-04 08:34:28
○ 2026-03-26 12:11:52

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
certusstudymanager.com	asa.ns.cloudflare.com, brady.ns.cloudflare.com	12 records

✅ Authoritative Response

Server:108.162.195.215

NS records: asa.ns.cloudflare.com, brady.ns.cloudflare.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1671ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.140.224, 104.21.94.229`
AAAA	2	`2606:4700:3034::6815:5ee5, 2606:4700:3034::ac43:8ce0`
NS	2	`asa.ns.cloudflare.com, brady.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`asa.ns.cloudflare.com dns.cloudflare.com`

📌 Glue Records Collected

Total: 12

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

Analysis

IP Addresses

certusstudymanager.com maps to four IP numbers: 2606:4700:3034::6815:5ee5, 2606:4700:3034::ac43:8ce0, 104.21.94.229 and 172.67.140.224.

Name Servers

Two name servers asa.ns.cloudflare.com and brady.ns.cloudflare.com are delegated to certusstudymanager.com.

certusstudymanager.com uses the same name server configuration as other domains, such as nhcast.org, echiquier-nicois.org, negretefamily.com, danix.cz and medi-in-park.de.

certusstudymanager.com at least partially shares name servers with other domains such as xx3544xx.cc, badak178ee.site, madcat.media, sgnzs.com and marinasisetia.vip.

These name servers are commonly used with lilyana.ns.cloudflare.com and dilbert.ns.cloudflare.com.

Host names with six IP numbers: Host name asa.ns.cloudflare.com points to 2606:4700:50::adf5:3af6, 2803:f800:50::6ca2:c0f6, 2a06:98c1:50::ac40:20f6, 108.162.192.246, 172.64.32.246 and 173.245.58.246; host name brady.ns.cloudflare.com points to 2606:4700:58::a29f:2cd7, 2803:f800:50::6ca2:c3d7, 2a06:98c1:50::ac40:23d7, 108.162.195.215, 162.159.44.215 and 172.64.35.215.

certusstudymanager.com - robtex.com