mx.tetsu.co.jp - robtex.com
mx.tetsu.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.206.94🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
tetsu.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.205.50🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | tetsu.co.jp ⭐ | ||||||
| NS | dnss10.so-net.ne.jp | ||||||
| NS | dnss11.so-net.ne.jp | ||||||
| MX | mx.tetsu.co.jp ⭐ | ||||||
| TXT | v=spf1 include:_spf.shared-server.net +mx ~all | ||||||
| SOA | tetsu.co.jphostmaster@tetsu.co.jp serial=2602171610 | ||||||
MX for
Same first word
Similar names
DNS History
2 records (1 active, 1 former)
●A153.122.206.942026-07-02 → 2026-07-29 · 3 obs
○ 2017-05-24 09:39:16
● 2026-07-02 05:01:58
● 2026-07-29 07:27:50
● 2026-07-02 05:01:58
● 2026-07-29 07:27:50
○A211.13.204.142017-05-24 → 2017-05-24 · 3 obs
● 2017-05-24 09:39:16
○ 2026-07-02 05:01:58
○ 2026-07-29 07:27:50
○ 2026-07-02 05:01:58
○ 2026-07-29 07:27:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| tetsu.co.jp | dnss10.so-net.ne.jp, dnss11.so-net.ne.jp | - |
✅ Authoritative Response
Server:210.139.255.1
NS records: dnss10.so-net.ne.jp, dnss11.so-net.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for tetsu.co.jp (unsigned zone)
⏱️ Timing
Total: 1471ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.206.94 |
Analysis
Mail Server Role
Mail for tetsu.co.jp is routed through the mail server mx.tetsu.co.jp.
IP Addresses
mx.tetsu.co.jp has exactly one IP address — 153.122.206.94.
mx.kiyonet.org, mx.rogweb.jp, mx.ksunet.co.jp plus two other host names have IP numbers in common with mx.tetsu.co.jp.