mail.jan-net.com - robtex.com

mail.jan-net.com

DNSSEC⚠️ Not signed
A203.137.75.19🇯🇵 IDC203.137.64.0/20 Frontier Inc.
PTRsv203137075019.extlink.co.jp

jan-net.com

DNSSEC⚠️ Not signed
A203.183.199.24🇯🇵 IDC203.183.192.0/18 Frontier Inc.
NSns.jan-net.com ⭐
NSns1.dns-domain.jp
NSns2.dns-domain.jp
NSns3.dns-domain.jp
NSns4.dns-domain.jp
NSns5.dns-domain.jp
MXmail.jan-net.com ⭐
TXTv=spf1 a mx +ip4:202.234.142.38 ~all
SOAns.jan-net.compostmaster@jan-net.com 2010-01-28 #30

MX for

jan-net.com

Same first word

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DNS History

1 record (1 active, 0 former)

A203.137.75.19
●A203.137.75.192026-02-25 → 2026-03-28 · 2 obs
● 2026-02-25 18:59:22
● 2026-03-28 02:11:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comc.gtld-servers.net, e.gtld-servers.net, g.gtld-servers.net, b.gtld-servers.net...-
jan-net.comns1.dns-domain.jp, ns2.dns-domain.jp, ns3.dns-domain.jp, ns4.dns-domain.jp...-

✅ Authoritative Response

Server:202.218.51.200

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 jan-net.com (unsigned zone)

⏱️ Timing

Total: 1112ms | Queries: -

📄 Records

TypeCountSample Data
A1203.137.75.19

Analysis

Mail Server Role

mail.jan-net.com functions as a mail server for jan-net.com.

IP Addresses

mail.jan-net.com resolves to one IP number: 203.137.75.19.

other host names including sv203137075019.extlink.co.jp, mail.matsuyama-tiryou.com, mail.bodix.net, mail.nijumaru.jp and mail.sanyo-1967.com share IP numbers with mail.jan-net.com.