koken-e.co.jp - robtex.com
koken-e.co.jp
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
Subdomains
www.koken-e.co.jp |
Same first word
Similar names
DNS History
11 records (6 active, 5 former)
○NSgntdns01.alpha-plt.jp2017-02-16 → 2017-02-16 · 3 obs
○ 2026-04-11 01:16:36
○ 2026-07-28 01:53:10
○NSgntdns02.alpha-plt.jp2017-02-16 → 2017-02-16 · 3 obs
○ 2026-04-11 01:16:36
○ 2026-07-28 01:53:10
○NSgntdns03.alpha-plt.jp2017-02-16 → 2017-02-16 · 3 obs
○ 2026-04-11 01:16:36
○ 2026-07-28 01:53:10
○NSgntmst21.alpha-plt.jp2017-02-16 → 2017-02-16 · 3 obs
○ 2026-04-11 01:16:36
○ 2026-07-28 01:53:10
●NSskydns11.otsuka-office365.jp2026-04-11 → 2026-07-28 · 3 obs
● 2026-04-11 01:16:36
● 2026-07-28 01:53:10
●NSskydns12.otsuka-office365.jp2026-04-11 → 2026-07-28 · 3 obs
● 2026-04-11 01:16:36
● 2026-07-28 01:53:10
●NSskydns13.otsuka-office365.jp2026-04-11 → 2026-07-28 · 3 obs
● 2026-04-11 01:16:36
● 2026-07-28 01:53:10
●NSskydns99.otsuka-office365.jp2026-04-11 → 2026-07-28 · 3 obs
● 2026-04-11 01:16:36
● 2026-07-28 01:53:10
○MXamxi.aics.ne.jp2017-02-16 → 2017-02-16 · 3 obs
○ 2026-04-11 01:16:36
○ 2026-07-28 01:53:10
●MXkoken-e.in.tmems-jp.trendmicro.com2026-04-11 → 2026-07-28 · 3 obs
● 2026-04-11 01:16:36
● 2026-07-28 01:53:10
●A153.120.2.1282026-04-11 → 2026-07-28 · 2 obs
● 2026-07-28 01:53:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | h.dns.jp, g.dns.jp, a.dns.jp, e.dns.jp... | - |
| koken-e.co.jp | skydns11.otsuka-office365.jp, skydns13.otsuka-office365.jp, skydns12.otsuka-office365.jp | 3 records |
✅ Authoritative Response
Server:157.205.160.35
NS records: skydns11.otsuka-office365.jp, skydns13.otsuka-office365.jp, skydns12.otsuka-office365.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for koken-e.co.jp (unsigned zone)
⏱️ Timing
Total: 675ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.120.2.128 |
| NS | 3 | skydns13.otsuka-office365.jp, skydns12.otsuka-office365.jp... |
| MX | 1 | koken-e.in.tmems-jp.trendmicro.com (pri: |
| TXT | 1 | v=spf1 include:spf.protection.outlook.co |
| SOA | 1 | skydns99.otsuka-office365.jp hostmaster. |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (skydns13.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns11.otsuka-office365.jp)
Analysis
Hierarchy
koken-e.co.jp serves as the parent of www.koken-e.co.jp.
IP Addresses
koken-e.co.jp has exactly one IP address — 153.120.2.128.
Additional host names — including www.koken-e.co.jp and www18114ui.sakura.ne.jp — share IP numbers with koken-e.co.jp.
Name Servers
Four name servers handle the delegation for koken-e.co.jp: skydns11.otsuka-office365.jp, skydns12.otsuka-office365.jp, skydns13.otsuka-office365.jp and skydns99.otsuka-office365.jp.
koken-e.co.jp has at least partial name server overlap with other domains, such as daido-kasei.co.jp, venetex.co.jp, suzukishokan.co.jp and two others.
Four host names, each with one IP address: skydns11.otsuka-office365.jp has 157.205.203.141, skydns12.otsuka-office365.jp has 157.205.160.35, skydns13.otsuka-office365.jp has 157.205.160.51 and skydns99.otsuka-office365.jp has 157.205.203.139.
Mail Servers
koken-e.co.jp uses one mail server — koken-e.in.tmems-jp.trendmicro.com.
koken-e.in.tmems-jp.trendmicro.com points to three IP addresses: 18.176.203.131, 18.176.203.132 and 18.176.203.133.