mx.cb-school.com - robtex.com
mx.cb-school.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.19.140🇯🇵 AS131921153.122.16.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| PTR | sub0000550242.hmk-temp.com | ||||||
cb-school.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 203.137.185.184🇯🇵 IDC203.137.128.0/18 Frontier Inc. | ||||||
| NS | ns1.art21.co.jp ⭐ | ||||||
| NS | sdi05.h-ix.jp | ||||||
| MX | mx.cb-school.com ⭐ | ||||||
| TXT | v=spf1 +ip4:203.137.185.184 +include:mailsvr02.art21.co.jp ~all | ||||||
| SOA | ns1.art21.co.jppostmaster@ns1.art21.co.jp 2024-01-23 #0 | ||||||
MX for
Same first word
Similar names
xm.am |
xm.money |
xm.be |
xm.cz |
xm.hk.cn |
xm.fj.cn |
xm.pl |
xm.vn.ua |
xm.house |
xm.mk |
xm.com |
xm.biz |
xm.media |
xm.fyi |
xm.pe |
xm.wtf |
xm.nl |
xm.cn |
xm.gov.cn |
xm.city |
xm.ca |
xm.ee |
xm.ae |
xm.lc |
xm.chat |
xm.life |
xm.net |
DNS History
1 record (1 active, 0 former)
●A153.122.19.1402026-02-24 → 2026-03-24 · 2 obs
● 2026-02-24 13:50:48
● 2026-03-24 10:11:18
● 2026-03-24 10:11:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| cb-school.com | ns1.art21.co.jp, sdi05.h-ix.jp | - |
✅ Authoritative Response
Server:122.221.93.34
NS records: ns1.art21.co.jp, sdi05.h-ix.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cb-school.com (unsigned zone)
⏱️ Timing
Total: 1398ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.19.140 |
Analysis
Mail Server Role
mx.cb-school.com serves as the mail server for cb-school.com.
IP Addresses
mx.cb-school.com points to an IP address: 153.122.19.140.
other host names include mx.dohkohkai.or.jp, mx.imai-hcc.com, mx.asahibestlife.jp, mx.hosyuu.jp and mx.tateyo.com; they share IP numbers with mx.cb-school.com.