mx.system21.co.jp - robtex.com
mx.system21.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.206.114🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
system21.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.205.4🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | ns2.namedserver.net ⭐ | ||||||
| NS | ns.namedserver.net | ||||||
| MX | mx.system21.co.jp ⭐ | ||||||
| TXT | v=spf1 include:_spf.shared-server.net ~all | ||||||
| SOA | ns.namedserver.netroot@namedserver.net serial=2698686973 | ||||||
MX for
Same first word
Similar names
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| system21.co.jp | ns2.namedserver.net, ns.namedserver.net | - |
✅ Authoritative Response
Server:157.120.113.212
NS records: ns2.namedserver.net, ns.namedserver.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for system21.co.jp (unsigned zone)
⏱️ Timing
Total: 1404ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.206.114 |
Analysis
Mail Server Role
mx.system21.co.jp serves as the mail server for system21.co.jp.
IP Addresses
mx.system21.co.jp points to a single IP: 153.122.206.114.
Other host names, for instance mx.nohken.or.jp, mx.foryourgoodsmile.com, mx.okumed.com, mx.takejiro.net and mx.tamba-jun.com share IP numbers with mx.system21.co.jp.