`webcertain.com.cn`

DNSSEC	⚠️ Not signed
A	2606:4700:3031::ac43:8e36^{🇺🇸 Cloudflare2606:4700:3031::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	2606:4700:3037::6815:2714^{🇺🇸 Cloudflare2606:4700:3037::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	104.21.39.20^{Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
A	172.67.142.54^{🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US} ✓ In HTTPS hints
NS	`johnathan.ns.cloudflare.com` ⭐
		A	2606:4700:58::a29f:2c2c^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnathan.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c32c^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`johnathan.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:232c^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`johnathan.ns.cloudflare.com`
		A	108.162.195.44^{🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnathan.ns.cloudflare.com`
		A	162.159.44.44^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnathan.ns.cloudflare.com`
		A	172.64.35.44^{🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`johnathan.ns.cloudflare.com`
NS	`poppy.ns.cloudflare.com`
		A	2606:4700:50::a29f:2621^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`poppy.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c221^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`poppy.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2221^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`poppy.ns.cloudflare.com`
		A	108.162.194.33^{🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`poppy.ns.cloudflare.com`
		A	162.159.38.33^{Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`poppy.ns.cloudflare.com`
		A	172.64.34.33^{🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`poppy.ns.cloudflare.com`
HTTPS	HTTP/3, HTTP/2 ✓ hints match
		IPv4 hints	104.21.39.20, 172.67.142.54
		IPv6 hints	2606:4700:3031::ac43:8e36, 2606:4700:3037::6815:2714
		ECH	X25519, HKDF-SHA256 + AES-128-GCM draft, id=123, name=cloudflare-ech.com
SOA	`johnathan.ns.cloudflare.com`dns@cloudflare.com serial=2410518570

`com.cn`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.cn` ⭐ ⚠️ Not in parent delegation
	NS	`b.dns.cn` ⚠️ Not in parent delegation
	NS	`c.dns.cn` ⚠️ Not in parent delegation
	NS	`cns.cernet.net` ⚠️ Not in parent delegation
	NS	`d.dns.cn` ⚠️ Not in parent delegation
	NS	`e.dns.cn` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2030721743

WOT: NOT_SAFE (20/100)

Same first word

webcertain.net

webcertain.hk

webcertain.es

webcertain.com

webcertain.com.cn

webcertain.it

Similar names

certainweb.com

bacnetwire.com

centriaweb.azurewebsites.net

waterbnice.com

DNS History

8 records (6 active, 2 former)

●NSjohnathan.ns.cloudflare.com2026-06-13 → 2026-08-02 · 2 obs

● 2026-06-13 13:55:14
● 2026-08-02 18:34:14

●NSpoppy.ns.cloudflare.com2026-06-13 → 2026-08-02 · 2 obs

● 2026-06-13 13:55:14
● 2026-08-02 18:34:14

●A104.21.39.202026-06-13 → 2026-08-02 · 2 obs

● 2026-06-13 13:55:14
● 2026-08-02 18:34:14

●A172.67.142.542026-06-13 → 2026-08-02 · 2 obs

● 2026-06-13 13:55:14
● 2026-08-02 18:34:14

●A2606:4700:3031::ac43:8e362026-07-07 → 2026-08-02 · 3 obs

○ 2026-06-13 13:55:14
● 2026-07-07 19:59:14
● 2026-08-02 18:34:14

○A2606:4700:3033::ac43:8e362026-06-13 → 2026-06-13 · 3 obs

● 2026-06-13 13:55:14
○ 2026-07-07 19:59:14
○ 2026-08-02 18:34:14

○A2606:4700:3034::6815:27142026-06-13 → 2026-06-13 · 3 obs

● 2026-06-13 13:55:14
○ 2026-07-07 19:59:14
○ 2026-08-02 18:34:14

●A2606:4700:3037::6815:27142026-07-07 → 2026-08-02 · 3 obs

○ 2026-06-13 13:55:14
● 2026-07-07 19:59:14
● 2026-08-02 18:34:14

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
webcertain.com.cn	poppy.ns.cloudflare.com, johnathan.ns.cloudflare.com	-

✅ Authoritative Response

Server:108.162.195.44

NS records: poppy.ns.cloudflare.com, johnathan.ns.cloudflare.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for webcertain.com.cn (unsigned zone)

⏱️ Timing

Total: 824ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`172.67.142.54, 104.21.39.20`
AAAA	2	`2606:4700:3031::ac43:8e36, 2606:4700:3037::6815:2714`
NS	2	`johnathan.ns.cloudflare.com, poppy.ns.cloudflare.com`
HTTPS	1	`{"priority":1,"target":".","alpn":["h3",`
SOA	1	`johnathan.ns.cloudflare.com dns.cloudfla`

Analysis

IP Addresses

webcertain.com.cn points to the four IP addresses 104.21.39.20, 172.67.142.54, 2606:4700:3031::ac43:8e36 and 2606:4700:3037::6815:2714.

Among the host names that share IP numbers with webcertain.com.cn are www.silicontap.com, pmb.stitastbr.ac.id, www.paki11.com and two others.

Name Servers

webcertain.com.cn is served by two delegated name servers, johnathan.ns.cloudflare.com and poppy.ns.cloudflare.com.

webcertain.com.cn has the same name server delegation as a number of other domains, such as 6171.com.cn, feishe.city, mfyun.com.cn and two more.

There is at least partial name server overlap between webcertain.com.cn and other domains — maximum22.ru, xinchengqm.com, js66678.com and two more among them.

These name servers frequently co-occur with the name servers stan.ns.cloudflare.com and alaric.ns.cloudflare.com.

Host names resolving to 6 IP numbers:

johnathan.ns.cloudflare.com carries IP addresses 108.162.195.44, 162.159.44.44 and 172.64.35.44, with 3 other addresses beyond those.

poppy.ns.cloudflare.com carries IP addresses 108.162.194.33, 162.159.38.33 and 172.64.34.33, with 3 other addresses beyond those.

webcertain.com.cn - robtex.com