`certus.app`

DNSSEC	🔒 Signed (DS record present)
A	4.180.104.106^{🇳🇱 Microsoft4.176.0.0/12 MICROSOFT}
NS	`ns1-04.azure-dns.com` ⭐
		A	2603:1061:0:700::4^{🇺🇸 Microsoft2603:1000::/25 MICROSOFT}
			PTR	`ns1-04.azure-dns.com`
		A	13.107.236.4^{🇺🇸 Microsoft13.104.0.0/14 MICROSOFT}
			PTR	`ns1-04.azure-dns.com`
NS	`ns2-04.azure-dns.net`
		A	2620:1ec:8ec:700::4^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns2-04.azure-dns.net`
		A	150.171.21.4^{🇺🇸 Microsoft150.171.0.0/16 MICROSOFT}
			PTR	`ns2-04.azure-dns.net`
NS	`ns3-04.azure-dns.org`
		A	2a01:111:4000:700::4^{🇬🇧 Microsoft2a01:111:4000::/36}
			PTR	`ns3-04.azure-dns.org`
		A	204.14.183.4^{🇺🇸 Microsoft204.14.180.0/22}
			PTR	`ns3-04.azure-dns.org`
NS	`ns4-04.azure-dns.info`
		A	2620:1ec:bda:700::4^{🇺🇸 Microsoft2620:1ec::/36 MICROSOFT}
			PTR	`ns4-04.azure-dns.info`
		A	208.84.5.4^{🇺🇸 Microsoft208.84.0.0/21 MICROSOFT}
			PTR	`ns4-04.azure-dns.info`
MX	`certus-app.mail.protection.outlook.com` ⭐
		A	2a01:111:f403:ca04::2^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-du2pr03cu00102.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::9^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-db7pr03cu00601.inbound.protection.outlook.com`
		A	2a01:111:f403:ca04::a^{🇮🇪 Microsoft2a01:111:f000::/36}
			PTR	`mail-du0pr03cu00102.inbound.protection.outlook.com`
		A	2a01:111:f403:ca09::1^{🇳🇱 Microsoft2a01:111:f000::/36}
			PTR	`mail-as9pr07cu00301.inbound.protection.outlook.com`
		A	52.101.68.3^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-db7pr03cu00403.inbound.protection.outlook.com`
		A	52.101.68.29^{🇮🇪 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-dbapr03cu00105.inbound.protection.outlook.com`
		A	52.101.73.4^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am0pr83cu00404.inbound.protection.outlook.com`
		A	52.101.73.6^{🇳🇱 Microsoft52.96.0.0/12 MICROSOFT}
			PTR	`mail-am6pr04cu00306.inbound.protection.outlook.com`
TXT	`MS=ms23434477`
TXT	`v=spf1 include:spf.protection.outlook.com -all`
SOA	`ns1-04.azure-dns.com`azuredns-hostmaster@microsoft.com serial=1

`app`

	DNSSEC	🔒 Signed (DS record present)
	NS	`ns-tld1.charlestonroadregistry.com` ⭐
	NS	`ns-tld2.charlestonroadregistry.com`
	NS	`ns-tld3.charlestonroadregistry.com`
	NS	`ns-tld4.charlestonroadregistry.com`
	NS	`ns-tld5.charlestonroadregistry.com`
	SOA	`ns-tld1.charlestonroadregistry.com`cloud-dns-hostmaster@google.com serial=101427

🔒 HSTS Preload (+subdomains)

Same first word

certus.net

certus.bydgoszcz.pl

certus.bytom.pl

certus.mx

certus.cn

certus.ru

certus.sk

certus.hu

certus.ie

certus.ca

certus.no

certus.net.pl

certus.med.pl

certus.group

certus.biz

certus.finance

certus.hr

certus.kiev.ua

certus.digital

certus.lv

certus.software

certus.solutions

certus.international

certus.com

certus.edu.pe

certus.me

certus.in

certus.gr

certus.it

certus.katowice.pl

certus.eu

certus.org

certus.com.mx

certus.com.br

certus.nl

certus.construction

certus.co

certus.inf.br

certus.cz

certus.es

certus.com.hk

certus.com.ua

certus.one

certus.healthcare

certus.net.br

certus.com.pl

certus.se

certus.co.nz

certus.pl

certus.de

certus.cnt.br

certus.fr

certus.app

certus.be

certus.co.uk

certus.edu.pl

Similar names

surtec.com.br

rectus.no

rectus.hu

custer.us

sectur.net

sectur.gov.do

tecsur.com.pe

sectur.mx

cetrus.pt

custer.com

trusec.co.uk

scuter.kiev.ua

surtec.nl

tecsur.org

tecsur.com

ruscet.xyz

rectus.edu.pl

curtes.zone

surtec.ch

crestu.com

cutres.com

surtec.eu

surtec.com

cetsur.org

securt.cz

rectus.cz

surtec.pl

recuts.org

cruset.eu

cetrus.pl

cruest.com

rectus.pl

cetsur.com

trusec.com.br

rectus.com

custer.net

scrute.com

rectus.be

tsecur.com

sectur.gob.mx

scuter.com

rectus.eu

surtec.net

rectus.jp

cretus.net

recstu.co.jp

ustcer.com

eucrst.com

rectus.es

surtec.uy

scuter.it

tecsur.pe

recstu.com

ecrust.net

surtec.es

cruset.ru

cusert.com

sucert.ro

rustec.net

ctuser.com

rectus.dk

sectur.gov.ar

custer.lt

cetrus.com.br

trecus.net

rectus.cn

custer.com.au

custer.cz

custer.ch

tecsur.net

ucerts.com

rectus.co.jp

surtec.info

cretus.ru

DNS History

6 records (6 active, 0 former)

●NSns1-04.azure-dns.com2026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

●NSns2-04.azure-dns.net2026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

●NSns3-04.azure-dns.org2026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

●NSns4-04.azure-dns.info2026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

●MXcertus-app.mail.protection.outlook.com2026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

●A4.180.104.1062026-02-18 → 2026-03-16 · 2 obs

● 2026-02-18 05:19:48
● 2026-03-16 10:59:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
app	ns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...	-
certus.app	ns1-04.azure-dns.com, ns3-04.azure-dns.org, ns2-04.azure-dns.net, ns4-04.azure-dns.info	-

✅ Authoritative Response

Server: 204.14.183.4

NS records: ns1-04.azure-dns.com, ns3-04.azure-dns.org, ns2-04.azure-dns.net, ns4-04.azure-dns.info

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 750ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`4.180.104.106`
NS	4	`ns1-04.azure-dns.com, ns2-04.azure-dns.net...`
MX	1	`certus-app.mail.protection.outlook.com (`
TXT	2	`MS=ms23434477, v=spf1 include:spf.protection.outlook.co`
SOA	1	`ns1-04.azure-dns.com azuredns-hostmaster`