mail.frontier-u.jp - robtex.com

mail.frontier-u.jp

DNSSEC⚠️ Not signed
A160.16.64.226🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
PTRmail.kagawa.ac

frontier-u.jp

DNSSEC⚠️ Not signed
A160.16.117.56🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan
NSmaster.dns.ne.jp ⭐
NSns1.dns.ne.jp
NSns2.dns.ne.jp
MXmail.frontier-u.jp ⭐
TXTv=spf1 ip4:124.146.155.50 +ip4:153.149.172.206 +ip4:160.16.64.226 include:_sp...
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-03-20 #1

MX for

frontier-u.jp

Same first word

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DNS History

2 records (1 active, 1 former)

200920112013201520172019202120232025A160.16.64.226180.37.19.195
●A160.16.64.2262026-02-17 → 2026-05-13 · 3 obs
○ 2017-01-06 02:37:24
● 2026-02-17 02:33:26
● 2026-05-13 18:42:58
○A180.37.19.1952015-08-10 → 2017-01-06 · 5 obs
○ 2008-11-29 20:40:18
● 2015-08-10 13:17:52
● 2017-01-06 02:37:24
○ 2026-02-17 02:33:26
○ 2026-05-13 18:42:58

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpc.dns.jp, e.dns.jp, a.dns.jp, d.dns.jp...-
frontier-u.jpns1.dns.ne.jp, ns2.dns.ne.jp2 records

✅ Authoritative Response

Server:133.167.21.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for frontier-u.jp (unsigned zone)

⏱️ Timing

Total: 1105ms | Queries: -

📄 Records

TypeCountSample Data
A1160.16.64.226

📌 Glue Records Collected

Total: 2

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

Analysis

Mail Server Role

mail.frontier-u.jp is the mail server for frontier-u.jp.

IP Addresses

mail.frontier-u.jp points to a single IP number: 160.16.64.226.

Other host names, for instance ns2.kagawa.ac, mail.kagawa.ac and gateway.frontier-u.jp share IP numbers with mail.frontier-u.jp.