mail.sein21.jp - robtex.com

mail.sein21.jp

DNSSEC⚠️ Not signed
A49.212.235.64🇯🇵 SAKURA-C49.212.0.0/16 (7/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww3354.sakura.ne.jp

sein21.jp

DNSSEC⚠️ Not signed
NSmaster.dns.ne.jp ⭐
NSns1.dns.ne.jp
NSns2.dns.ne.jp
MXmail.sein21.jp ⭐
TXTp93b6r5lh0qv1y456mt5qrc0yfmhyqfn
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-08-27 #1

MX for

sein21.jp

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DNS History

1 record (1 active, 0 former)

201820192020202120222023202420252026A49.212.235.64
●A49.212.235.642017-01-28 → 2026-05-11 · 2 obs
● 2017-01-28 05:52:36
● 2026-05-11 15:51:12

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
sein21.jpns2.dns.ne.jp, ns1.dns.ne.jp2 records

✅ Authoritative Response

Server:61.211.236.1

NS records: ns2.dns.ne.jp, ns1.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sein21.jp (unsigned zone)

⏱️ Timing

Total: 1262ms | Queries: -

📄 Records

TypeCountSample Data
A149.212.235.64

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.dns.ne.jp, ns1.dns.ne.jp)

Analysis

Mail Server Role

mail.sein21.jp serves as the mail server for sein21.jp.

IP Addresses

mail.sein21.jp points to a single IP address: 49.212.235.64.

Other host names such as msv-ehc01421.sakura.ne.jp, studio-tap.sakura.ne.jp, moderiver.com, mbwkb.com and kub.jp share IP numbers with mail.sein21.jp.