mail.firstone.jp - robtex.com

mail.firstone.jp

DNSSEC⚠️ Not signed
A114.17.21.142🇯🇵 KDDI114.17.0.0/16
PTRdns14.n-server.com

firstone.jp

DNSSEC⚠️ Not signed
A114.17.21.142🇯🇵 KDDI114.17.0.0/16
NSns.firstone.jp ⭐ ⚠️ Not in parent delegation
NSdns136.n-server.com ⚠️ Not in zone NS records
NSdns14.n-server.com ⚠️ Not in zone NS records
MXmail.firstone.jp ⭐
TXTv=spf1 +a +mx -all
SOAns.firstone.jpplesk@purenic.jp 2025-10-01 #2

MX for

firstone.jp

Same first word

mail.nr
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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A114.17.21.142106.186.69.11
○A106.186.69.112015-05-23 → 2016-06-20 · 4 obs
● 2015-05-23 23:43:38
● 2016-06-20 00:08:28
○ 2026-03-25 17:16:16
○ 2026-04-13 18:24:02
●A114.17.21.1422026-03-25 → 2026-04-13 · 3 obs
○ 2016-06-20 00:08:28
● 2026-03-25 17:16:16
● 2026-04-13 18:24:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpe.dns.jp, g.dns.jp, c.dns.jp, a.dns.jp...-
firstone.jpdns136.n-server.com, dns14.n-server.com-

✅ Authoritative Response

Server:114.17.21.142

NS records: dns136.n-server.com, dns14.n-server.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for firstone.jp (unsigned zone)

⏱️ Timing

Total: 1308ms | Queries: -

📄 Records

TypeCountSample Data
A1114.17.21.142

Analysis

Mail Server Role

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

IP Addresses

mail.firstone.jp resolves to a single IP address: 114.17.21.142.

Other host names including ns.ysautocraft.com, furisode-sanwa.co.jp, ns1.hayashi-ichigo.com, mail.lo-op.org and ns1.nakaopaint.com share IP numbers with mail.firstone.jp.