b2bco.cn - dns.ninja

`b2bco.cn`

DNSSEC	⚠️ Not signed
A	192.236.128.139^{🇺🇸 HOSTWINDS-1192.236.128.0/17 MNT-HL-29 route 192.236.128.000/17 AS54290}
NS	`art.ns.cloudflare.com` ⭐
		A	2606:4700:58::adf5:3b66^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c166^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`art.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:2166^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`art.ns.cloudflare.com`
		A	108.162.193.102^{🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	172.64.33.102^{🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
		A	173.245.59.102^{🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`art.ns.cloudflare.com`
NS	`mona.ns.cloudflare.com`
		A	2606:4700:50::adf5:3ace^{🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mona.ns.cloudflare.com`
		A	2803:f800:50::6ca2:c0ce^{🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L}
			PTR	`mona.ns.cloudflare.com`
		A	2a06:98c1:50::ac40:20ce^{🇺🇸 Cloudflare2a06:98c1:50::/45}
			PTR	`mona.ns.cloudflare.com`
		A	108.162.192.206^{🇺🇸 Cloudflare108.162.192.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mona.ns.cloudflare.com`
		A	172.64.32.206^{🇺🇸 Cloudflare172.64.32.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mona.ns.cloudflare.com`
		A	173.245.58.206^{🇺🇸 Cloudflare173.245.58.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
			PTR	`mona.ns.cloudflare.com`
MX	`mail.b2bco.cn` ⭐
		A	192.236.128.139^{🇺🇸 HOSTWINDS-1192.236.128.0/17 MNT-HL-29 route 192.236.128.000/17 AS54290}
TXT	`v=spf1 a mx ~all`
SOA	`art.ns.cloudflare.com`dns@cloudflare.com serial=2407279151

`cn`

	DNSSEC	🔒 Signed (DS record present)
	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=2035104883

Subdomains

mail.b2bco.cn

Same first word

b2bco.com

b2bco.org

b2bco.net

b2bco.cn

Similar names

ocb2b.com

DNS History

6 records (4 active, 2 former)

●NSart.ns.cloudflare.com2026-03-23 → 2026-07-29 · 2 obs

● 2026-03-23 20:00:08
● 2026-07-29 08:05:16

●NSmona.ns.cloudflare.com2026-03-23 → 2026-07-29 · 2 obs

● 2026-03-23 20:00:08
● 2026-07-29 08:05:16

●MXmail.b2bco.cn2026-03-23 → 2026-07-29 · 2 obs

● 2026-03-23 20:00:08
● 2026-07-29 08:05:16

○A142.171.138.2482026-03-23 → 2026-03-25 · 4 obs

● 2026-03-23 20:00:08
● 2026-03-25 18:28:52
○ 2026-07-29 08:05:12
○ 2026-07-29 08:05:16

○A185.176.43.922026-03-23 → 2026-07-29 · 2 obs

○ 2026-03-23 20:00:08
○ 2026-07-29 08:05:16

●A192.236.128.1392026-07-29 → 2026-07-29 · 3 obs

○ 2026-03-25 18:28:52
● 2026-07-29 08:05:12
● 2026-07-29 08:05:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn...	-
b2bco.cn	art.ns.cloudflare.com, mona.ns.cloudflare.com	-

✅ Authoritative Response

Server:173.245.59.102

NS records: art.ns.cloudflare.com, mona.ns.cloudflare.com

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at cn: Error: DNS query timeout: 203.119.29.1 for DNSKEY cn

⏱️ Timing

Total: 3537ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.236.128.139`
NS	2	`art.ns.cloudflare.com, mona.ns.cloudflare.com`
MX	1	`mail.b2bco.cn (pri: 10)`
TXT	1	`v=spf1 a mx ~all`
SOA	1	`art.ns.cloudflare.com dns.cloudflare.com`

Analysis

Hierarchy

b2bco.cn serves as the parent of mail.b2bco.cn.

IP Addresses

b2bco.cn has exactly one IP address — 192.236.128.139.

Other host names — www.yakoo.cc, xiaba.cc, yakoo.cc and m.yakoo.cc — share IP numbers with b2bco.cn.

Name Servers

b2bco.cn is delegated to two name servers: art.ns.cloudflare.com and mona.ns.cloudflare.com.

The name server configuration of b2bco.cn is shared with other domains, for instance ambayhospital.com, drswith.workers.dev, bonafide.com.ar and two others.

b2bco.cn has at least partial name server overlap with other domains, such as dico-blagues.com, jowotd.za.com, x8.to and two others.

It is common to see these name servers used together with name servers ruben.ns.cloudflare.com and ridge.ns.cloudflare.com.

Hosts with 6 IP addresses each:

art.ns.cloudflare.com resolves to 108.162.193.102, 172.64.33.102, 173.245.59.102 and 3 other IP addresses.

mona.ns.cloudflare.com resolves to 108.162.192.206, 172.64.32.206, 173.245.58.206 and 3 other IP addresses.

Mail Servers

b2bco.cn uses one mail server — mail.b2bco.cn.

mail.b2bco.cn resolves to a single IP number: 192.236.128.139.