mail.st2b.com - robtex.com

mail.st2b.com

DNSSEC⚠️ Not signed
A203.137.75.20🇯🇵 IDC203.137.64.0/20 Frontier Inc.
PTRsv203137075020.extlink.co.jp

st2b.com

DNSSEC⚠️ Not signed
A203.183.80.38🇯🇵 IDC203.183.64.0/19 Frontier Inc.
NSns.st2b.com ⭐
NSns1.dns-domain.jp
NSns2.dns-domain.jp
NSns3.dns-domain.jp
NSns4.dns-domain.jp
NSns5.dns-domain.jp
MXmail.st2b.com ⭐
TXTv=spf1 a mx ~all
SOAns.st2b.compostmaster@st2b.com 2010-01-28 #3

MX for

st2b.com

Same first word

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DNS History

1 record (1 active, 0 former)

A203.137.75.20
●A203.137.75.202026-02-26 → 2026-04-15 · 2 obs
● 2026-02-26 10:38:32
● 2026-04-15 03:52:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comj.gtld-servers.net, k.gtld-servers.net, l.gtld-servers.net, m.gtld-servers.net...-
st2b.comns1.dns-domain.jp, ns2.dns-domain.jp, ns3.dns-domain.jp, ns4.dns-domain.jp...-

✅ Authoritative Response

Server:203.183.41.66

NS records: ns1.dns-domain.jp, ns2.dns-domain.jp, ns3.dns-domain.jp, ns4.dns-domain.jp, ns5.dns-domain.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for st2b.com (unsigned zone)

⏱️ Timing

Total: 1168ms | Queries: -

📄 Records

TypeCountSample Data
A1203.137.75.20

Analysis

Mail Server Role

mail.st2b.com serves as the mail server for st2b.com.

IP Addresses

mail.st2b.com points to IP number 203.137.75.20.

For instance, other host names mail.sy-tool.net, mail.akashi-shinsei.co.jp, mail.file-g.com, mail.success-speed.com and mail.meister-exterior.com share IP numbers with mail.st2b.com.