`certd.cn`

DNSSEC	⚠️ Not signed
A	2606:4700:3033::ac43:dcba^{🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3035::6815:2ded^{🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.45.237^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.220.186^{🇺🇸 Cloudflare172.67.208.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`diva.ns.cloudflare.com` ⭐
		A	2606:4700:50::adf5:3a61^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`diva.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c061^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`diva.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2061^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`diva.ns.cloudflare.com`
		A	108.162.192.97^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`diva.ns.cloudflare.com`
		A	172.64.32.97^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`diva.ns.cloudflare.com`
		A	173.245.58.97^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`diva.ns.cloudflare.com`
NS	`rex.ns.cloudflare.com`
		A	2606:4700:58::a29f:2c0d^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c30d^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`rex.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:230d^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`rex.ns.cloudflare.com`
		A	108.162.195.13^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	162.159.44.13^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
		A	172.64.35.13^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`rex.ns.cloudflare.com`
MX	`route2.mx.cloudflare.net` ⭐
		A	2606:4700:f5::e^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::f^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	2606:4700:f5::10^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.17^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.18^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
		A	162.159.205.19^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route2.mx.cloudflare.net`
MX	`route3.mx.cloudflare.net`⁽⁸²⁾
		A	2606:4700:f5::11^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::12^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	2606:4700:f5::13^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.23^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.24^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
		A	162.159.205.25^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route3.mx.cloudflare.net`
MX	`route1.mx.cloudflare.net`⁽¹⁰⁰⁾
		A	2606:4700:f5::b^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::c^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	2606:4700:f5::d^{🇺🇸 Cloudflare2606:4700:f5::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.11^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.12^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
		A	162.159.205.13^{Cloudflare162.159.205.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`route1.mx.cloudflare.net`
TXT	`v=spf1 include:_spf.mx.cloudflare.net ~all`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4	104.21.45.237, 172.67.220.186
		IPv6	2606:4700:3033::ac43:dcba, 2606:4700:3035::6815:2ded
SOA	`diva.ns.cloudflare.com`dns@cloudflare.com serial=2399203405

`cn`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2034546407

🔒 HSTS Preload (+subdomains)

Same first word

certd.cn

certd.com

Similar names

rdetc.com

dtcre.com

drtec.co.uk

drect.net

tecrd.fr

crted.com

drtec.com.br

tecrd.com

rdtec.ru

dertc.com

dtrec.com

trecd.com

rdtec.co.il

dcert.de

cdter.com

rtedc.org

drect.com

dcert.ink

etrdc.com

rdtec.com

drtec.net

drect.org

cterd.com

cdetr.io

rdtec.de

dtrec.it

rdcte.com

tecdr.net

credt.ru

drect.de

dcert.com

tecdr.com

tdcre.com

credt.com

ctedr.com

drtec.de

credt.fr

redct.com

rtdec.cn

rdtec.com.cn

cdert.com

etcdr.com

tcred.com

ctred.net

drtec.com.sg

ecrtd.org

dcert.org

cerdt.be

rtedc.digital

DNS History

12 records (9 active, 3 former)

●NSdiva.ns.cloudflare.com2026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

○NSmenu.dnspod.net2026-02-27 → 2026-03-14 · 4 obs

● 2026-02-27 16:46:42
● 2026-03-14 09:57:02
○ 2026-03-23 13:58:14
○ 2026-03-23 13:58:16

○NSrailway.dnspod.net2026-02-27 → 2026-03-14 · 4 obs

● 2026-02-27 16:46:42
● 2026-03-14 09:57:02
○ 2026-03-23 13:58:14
○ 2026-03-23 13:58:16

●NSrex.ns.cloudflare.com2026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●MXroute1.mx.cloudflare.net2026-03-23 → 2026-03-23 · 2 obs

● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●MXroute2.mx.cloudflare.net2026-03-23 → 2026-03-23 · 2 obs

● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●MXroute3.mx.cloudflare.net2026-03-23 → 2026-03-23 · 2 obs

● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●A104.21.45.2372026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●A172.67.220.1862026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

○A216.198.79.12026-02-27 → 2026-03-14 · 4 obs

● 2026-02-27 16:46:42
● 2026-03-14 09:57:02
○ 2026-03-23 13:58:14
○ 2026-03-23 13:58:16

●A2606:4700:3033::ac43:dcba2026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

●A2606:4700:3035::6815:2ded2026-03-23 → 2026-03-23 · 3 obs

○ 2026-03-14 09:57:02
● 2026-03-23 13:58:14
● 2026-03-23 13:58:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	b.dns.cn, e.dns.cn, d.dns.cn, a.dns.cn...	-
certd.cn	rex.ns.cloudflare.com, diva.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.192.97

NS records: rex.ns.cloudflare.com, diva.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for certd.cn (unsigned zone)

⏱️ Timing

Total: 204ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`104.21.45.237, 172.67.220.186`
AAAA	2	`2606:4700:3033::ac43:dcba, 2606:4700:3035::6815:2ded`
NS	2	`diva.ns.cloudflare.com, rex.ns.cloudflare.com`
MX	3	`route1.mx.cloudflare.net (pri: 100), route2.mx.cloudflare.net (pri: 19)...`
TXT	1	`v=spf1 include:_spf.mx.cloudflare.net ~a`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`diva.ns.cloudflare.com dns.cloudflare.co`

Analysis

IP Addresses

certd.cn refers to four IP numbers: 2606:4700:3033::ac43:dcba, 2606:4700:3035::6815:2ded, 104.21.45.237 and 172.67.220.186.

Other host names, for instance buy.roskaki.org, birteb.com, powercms.in, laarmeria.com.mx and tjhongshang.com share IP numbers with certd.cn.

Name Servers

certd.cn's delegation uses two name servers: diva.ns.cloudflare.com and rex.ns.cloudflare.com.

The name server setup for certd.cn is the same as for other domains, such as kanye2020.country, imaginesl.com, fpzdi.buzz and pn-bantul.go.id.

certd.cn at least partially shares name servers with other domains, including telegjxlq.shop, webchef.com.tr, taxijackpot168.com, guizhoubbs.net and novaluckyworld.com.

These name servers are commonly used together with the name servers heather.ns.cloudflare.com, chloe.ns.cloudflare.com, dean.ns.cloudflare.com and ligia.ns.cloudflare.com.

Host names with six IP numbers:

diva.ns.cloudflare.com points to 2606:4700:50::adf5:3a61, 2803:f800:50::6ca2:c061, 2a06:98c1:50::ac40:2061, 108.162.192.97, 172.64.32.97 and 173.245.58.97.

rex.ns.cloudflare.com points to 2606:4700:58::a29f:2c0d, 2803:f800:50::6ca2:c30d, 2a06:98c1:50::ac40:230d, 108.162.195.13, 162.159.44.13 and 172.64.35.13.

Mail Servers

Three mail servers handle certd.cn: route1.mx.cloudflare.net, route2.mx.cloudflare.net and route3.mx.cloudflare.net.

certd.cn shares at least some mail servers with other domains, for example mrxn.net, citrafm.com, nettruyenhe.site, bfai.net and ctrlz.ro.

Host names with six IP numbers:

route1.mx.cloudflare.net points to: 2606:4700:f5::b, 2606:4700:f5::c, 2606:4700:f5::d, 162.159.205.11, 162.159.205.12 and 162.159.205.13

route2.mx.cloudflare.net points to: 2606:4700:f5::e, 2606:4700:f5::f, 2606:4700:f5::10, 162.159.205.17, 162.159.205.18 and 162.159.205.19

route3.mx.cloudflare.net points to: 2606:4700:f5::11, 2606:4700:f5::12, 2606:4700:f5::13, 162.159.205.23, 162.159.205.24 and 162.159.205.25

certd.cn - robtex.com

certd.cn

cn

Same first word

Similar names

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

IP Addresses

Name Servers

Mail Servers

`certd.cn`

`cn`