kouseikan.jp - robtex.com
kouseikan.jp
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1777364102 | ||||||
Subdomains
mail.kouseikan.jp |
Same first word
kouseikan.jp |
Similar names
kaisouken.co.jp |
seikankou.com |
akunekiso.co.jp |
kunoseika.com |
nasekouki.co.jp |
soukenkai.net |
nakeisoku.com |
saikenkou.org |
soukenkai.or.jp |
kankousei.org |
kienkousa.com |
DNS History
12 records (6 active, 6 former)
●NS01.dnsv.jp2026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
●NS02.dnsv.jp2026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
●NS03.dnsv.jp2026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
●NS04.dnsv.jp2026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
○NSns.mcnet.ad.jp2015-06-27 → 2018-08-09 · 4 obs
● 2018-08-09 19:36:42
○ 2026-02-26 08:29:08
○ 2026-04-28 08:24:26
○NSns2.mcnet.ad.jp2015-06-27 → 2018-08-09 · 4 obs
● 2018-08-09 19:36:42
○ 2026-02-26 08:29:08
○ 2026-04-28 08:24:26
○MXmail.kouseikan.jp2015-06-27 → 2018-08-09 · 4 obs
● 2018-08-09 19:36:42
○ 2026-02-26 08:29:08
○ 2026-04-28 08:24:26
●MXsmtp.google.com2026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
○A143.125.255.2022018-08-09 → 2018-08-09 · 4 obs
● 2018-08-09 19:36:42
○ 2026-02-26 08:29:08
○ 2026-04-28 08:24:26
●A157.7.189.2482026-02-26 → 2026-04-28 · 3 obs
● 2026-02-26 08:29:08
● 2026-04-28 08:24:26
○A203.211.185.2122017-02-06 → 2017-02-06 · 4 obs
● 2017-02-06 07:37:14
○ 2018-08-09 19:36:42
○ 2026-04-28 08:24:26
○A219.96.93.1922015-06-27 → 2016-04-27 · 4 obs
● 2016-04-27 04:16:30
○ 2017-02-06 07:37:14
○ 2026-04-28 08:24:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | f.dns.jp, e.dns.jp, h.dns.jp, g.dns.jp... | - |
| kouseikan.jp | 03.dnsv.jp, 04.dnsv.jp, 01.dnsv.jp, 02.dnsv.jp | 7 records |
✅ Authoritative Response
Server:157.7.33.53
NS records: 03.dnsv.jp, 04.dnsv.jp, 01.dnsv.jp, 02.dnsv.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kouseikan.jp (unsigned zone)
⏱️ Timing
Total: 959ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 157.7.189.248 |
| NS | 4 | 01.dnsv.jp, 02.dnsv.jp... |
| MX | 1 | smtp.google.com (pri: 10) |
| TXT | 2 | google-site-verification=cS0AtvaGtCiN2Vt, v=spf1 include:_spf.google.com ip4:157.7 |
| SOA | 1 | 01.dnsv.jp hostmaster.dnsv.jp |
📌 Glue Records Collected
Total: 7
Out-of-bailiwick: 7 (01.dnsv.jp, 01.dnsv.jp, 02.dnsv.jp...)
Analysis
Hierarchy
kouseikan.jp is a parent of mail.kouseikan.jp.
IP Addresses
kouseikan.jp points to a single IP address: 157.7.189.248.
Other host names such as 1ot0.com, mail.applenet.jp, tripuuu.com, stargakki.com and www.t-carry.com share IP numbers with kouseikan.jp.
Name Servers
kouseikan.jp is delegated to four name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.
At least part of the name servers for kouseikan.jp are shared with other domains, for instance vcjp.net, accessline.jp, landho.co.jp, englishlearner-m.net and plus-note.jp.
Two IP numbers per host:
01.dnsv.jp points to 2400:8500:3300::53 and 157.7.32.53.
03.dnsv.jp points to 2400:8500:3000::53 and 157.7.34.53.
04.dnsv.jp points to 2400:8500:3fff::53 and 157.7.35.53.
One IP number per host:
02.dnsv.jp points to 157.7.33.53.
Mail Servers
The mail server for kouseikan.jp is smtp.google.com.
kouseikan.jp uses the same mail server setup as other domains, for instance carlohindian.com, finecoop.com, ecenter.com.ua, passionfelins.com and odd-job-man.com.
kouseikan.jp shares at least some mail servers with other domains, for example peiforests.ca, ecoplastech.ca, webdepro.com, prettifycreative.com and tlsindia.com.
These mail servers are commonly used alongside aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com and alt3.aspmx.l.google.com.
smtp.google.com resolves to nine IP numbers: 2607:f8b0:4004:c1b::1a, 2607:f8b0:4004:c1b::1b, 2607:f8b0:4004:c1d::1a, 2607:f8b0:4004:c1d::1b, 142.251.163.26, 142.251.163.27, 142.251.167.26, 142.251.167.27 and 192.178.155.27.