mtbs.co.jp - robtex.com
mtbs.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 140.227.100.131🇯🇵 InfoSphere140.227.0.0/16 INFOSPHERE | ||||||
| PTR | mtbs.co.jp | ||||||
| NS | ns3.sphere.ad.jp ⭐ | ||||||
| A | 202.239.113.22🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns3.sphere.ad.jp | ||||||
| NS | ns4.sphere.ad.jp | ||||||
| A | 202.239.113.30🇯🇵 InfoSphere202.239.64.0/18 INFOSPHERE | ||||||
| PTR | ns4.sphere.ad.jp | ||||||
| MX | mtbs.co.jp ⭐ | ||||||
| A | 140.227.100.131🇯🇵 InfoSphere140.227.0.0/16 INFOSPHERE | ||||||
| PTR | mtbs.co.jp | ||||||
| TXT | v=spf1 include:fmx.etius.jp +ip4:140.227.100.2/32 +ip4:140.227.100.131/32 -all | ||||||
| SOA | ns3.sphere.ad.jpdns@sphere.ad.jp serial=1576034154 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
PTR for
MX for
mtbs.co.jp |
Same first word
mtbs.gov |
mtbs.dk |
mtbs.eu |
mtbs.ca |
mtbs.nl |
mtbs.com.tw |
mtbs.com.au |
mtbs.com.cn |
mtbs.de |
mtbs.cz |
mtbs.eu.com |
mtbs.co.jp |
mtbs.net |
mtbs.com |
mtbs.workers.dev |
mtbs.com.pl |
mtbs.org |
mtbs.at |
mtbs.pl |
Similar names
DNS History
5 records (4 active, 1 former)
●NSns3.sphere.ad.jp2015-05-26 → 2026-07-17 · 2 obs
● 2026-07-17 15:26:26
●NSns4.sphere.ad.jp2015-05-26 → 2026-07-17 · 2 obs
● 2026-07-17 15:26:26
●MXmtbs.co.jp2015-05-26 → 2026-07-17 · 2 obs
● 2026-07-17 15:26:26
●A140.227.100.1312026-05-17 → 2026-07-17 · 3 obs
● 2026-05-17 05:08:12
● 2026-07-17 15:26:26
○A210.136.185.472015-05-26 → 2017-05-18 · 4 obs
● 2017-05-18 10:14:40
○ 2026-05-17 05:08:12
○ 2026-07-17 15:26:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| mtbs.co.jp | ns3.sphere.ad.jp, ns4.sphere.ad.jp | - |
✅ Authoritative Response
Server:202.239.113.30
NS records: ns3.sphere.ad.jp, ns4.sphere.ad.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for mtbs.co.jp (unsigned zone)
⏱️ Timing
Total: 1799ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 140.227.100.131 |
| NS | 2 | ns4.sphere.ad.jp, ns3.sphere.ad.jp |
| MX | 1 | mtbs.co.jp (pri: 10) |
| TXT | 1 | v=spf1 include:fmx.etius.jp +ip4:140.227 |
| SOA | 1 | ns3.sphere.ad.jp dns.sphere.ad.jp |
Analysis
Mail Server Role
The MX record for mtbs.co.jp points back to mtbs.co.jp — it is its own mail server.
IP Addresses
mtbs.co.jp directs to one IP number, which is 140.227.100.131.
Name Servers
mtbs.co.jp is delegated to two name servers: ns3.sphere.ad.jp and ns4.sphere.ad.jp.
mtbs.co.jp has the same name server delegation as a number of other domains, such as www.akiyamagarou.co.jp, sanritu-com.co.jp, 1-can.com and two more.
Some name servers delegated to mtbs.co.jp are also used by other domains, notably eload.jp and shirakabanosho.co.jp.
ns3.sphere.ad.jp → 202.239.113.22 and ns4.sphere.ad.jp → 202.239.113.30: one IP number per host name.
Mail Servers
The MX record for mtbs.co.jp points to a single mail server: mtbs.co.jp.
mtbs.co.jp resolves to a single IP number: 140.227.100.131.