mail.b2bco.cn - robtex.com

mail.b2bco.cn

DNSSEC⚠️ Not signed
A142.171.138.248🇺🇸 MULTA-ASN1142.171.128.0/17
PTRhost-120-by.yhsrv.com

b2bco.cn

DNSSEC⚠️ Not signed
A142.171.138.248🇺🇸 MULTA-ASN1142.171.128.0/17
NSart.ns.cloudflare.com ⭐
NSmona.ns.cloudflare.com
MXmail.b2bco.cn ⭐
TXTv=spf1 a mx ~all
SOAart.ns.cloudflare.comdns@cloudflare.com serial=2398868524

MX for

b2bco.cn

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DNS History

2 records (1 active, 1 former)

A142.171.138.248192.210.207.22
●A142.171.138.2482026-03-23 → 2026-03-25 · 2 obs
● 2026-03-23 20:00:08
● 2026-03-25 18:28:52
○A192.210.207.222026-03-23 → 2026-03-25 · 2 obs
○ 2026-03-23 20:00:08
○ 2026-03-25 18:28:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cna.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...-
b2bco.cnart.ns.cloudflare.com, mona.ns.cloudflare.com-

✅ Authoritative Response

Server:108.162.193.102

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for b2bco.cn (unsigned zone)

⏱️ Timing

Total: 1374ms | Queries: -

📄 Records

TypeCountSample Data
A1142.171.138.248

Analysis

Mail Server Role

mail.b2bco.cn functions as a mail server for b2bco.cn.

IP Addresses

mail.b2bco.cn resolves to one IP number: 142.171.138.248.

Other host names, for instance b2bco.cn, share IP numbers with mail.b2bco.cn.