mx.o21.co.jp - robtex.com
mx.o21.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.206.94🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
o21.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.205.34🇯🇵 AS131921153.122.192.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| NS | ns2.namedserver.net ⭐ | ||||||
| NS | ns.namedserver.net | ||||||
| MX | mx.o21.co.jp ⭐ | ||||||
| TXT | v=spf1 include:_spf.shared-server.net ~all | ||||||
| SOA | ns.namedserver.netroot@namedserver.net serial=2698676872 | ||||||
MX for
Same first word
Similar names
DNS History
2 records (1 active, 1 former)
●A153.122.206.942026-03-29 → 2026-03-29 · 2 obs
○ 2017-05-19 13:55:06
● 2026-03-29 18:47:24
● 2026-03-29 18:47:24
○A211.13.204.142017-05-19 → 2017-05-19 · 2 obs
● 2017-05-19 13:55:06
○ 2026-03-29 18:47:24
○ 2026-03-29 18:47:24
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| o21.co.jp | ns.namedserver.net, ns2.namedserver.net | - |
✅ Authoritative Response
Server:157.120.114.212
NS records: ns.namedserver.net, ns2.namedserver.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for o21.co.jp (unsigned zone)
⏱️ Timing
Total: 1243ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.206.94 |
Analysis
Mail Server Role
mx.o21.co.jp handles mail for o21.co.jp.
IP Addresses
mx.o21.co.jp points to a single IP address: 153.122.206.94.
Other host names such as mx.st-group.co.jp, mx.waterdoggarden.com, mx.fuku-chang.com, mx.jcps.or.jp and mx.washers.jp share IPs with mx.o21.co.jp.