koshiken.com - robtex.com
koshiken.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 219.94.192.30🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1620.sakura.ne.jp | ||||||
| NS | master.dns.ne.jp ⭐ | ||||||
| A | 210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | master.dns.ne.jp | ||||||
| NS | ns1.dns.ne.jp | ||||||
| A | 61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | ns1.dns.ne.jp | ||||||
| NS | ns2.dns.ne.jp | ||||||
| A | 133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | ns2.dns.ne.jp | ||||||
| MX | koshiken.com ⭐ | ||||||
| A | 219.94.192.30🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1620.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www1620.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-03-23 #1 | ||||||
com
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774502327 | ||||||
MX for
koshiken.com |
Same first word
koshiken.com |
Similar names
DNS History
12 records (5 active, 7 former)
○NS01.dnsv.jp2015-06-17 → 2019-01-21 · 4 obs
● 2019-01-21 10:11:12
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
○NS02.dnsv.jp2015-06-17 → 2019-01-21 · 4 obs
● 2019-01-21 10:11:12
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
○NS03.dnsv.jp2015-06-17 → 2019-01-21 · 4 obs
● 2019-01-21 10:11:12
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
○NS04.dnsv.jp2015-06-17 → 2019-01-21 · 4 obs
● 2019-01-21 10:11:12
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
●NSmaster.dns.ne.jp2026-03-17 → 2026-03-26 · 3 obs
● 2026-03-17 13:39:38
● 2026-03-26 05:40:12
●NSns1.dns.ne.jp2026-03-17 → 2026-03-26 · 3 obs
● 2026-03-17 13:39:38
● 2026-03-26 05:40:12
●NSns2.dns.ne.jp2026-03-17 → 2026-03-26 · 3 obs
● 2026-03-17 13:39:38
● 2026-03-26 05:40:12
○MXez-cloud-01.com2019-01-21 → 2019-01-21 · 3 obs
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
●MXkoshiken.com2026-03-17 → 2026-03-26 · 3 obs
● 2026-03-17 13:39:38
● 2026-03-26 05:40:12
○A153.122.3.822015-06-17 → 2017-02-10 · 4 obs
● 2017-02-10 22:08:48
○ 2019-01-21 10:11:12
○ 2026-03-26 05:40:12
○A202.254.236.1532019-01-21 → 2019-01-21 · 4 obs
● 2019-01-21 10:11:12
○ 2026-03-17 13:39:38
○ 2026-03-26 05:40:12
●A219.94.192.302026-03-17 → 2026-03-26 · 3 obs
● 2026-03-17 13:39:38
● 2026-03-26 05:40:12
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| koshiken.com | ns1.dns.ne.jp, ns2.dns.ne.jp | - |
✅ Authoritative Response
Server:133.167.21.1
NS records: ns1.dns.ne.jp, ns2.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for koshiken.com (unsigned zone)
⏱️ Timing
Total: 1279ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 219.94.192.30 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | koshiken.com (pri: 10) |
| TXT | 1 | v=spf1 a:www1620.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
Analysis
Mail Server Role
koshiken.com serves as the mail server for koshiken.com.
IP Addresses
koshiken.com resolves to a single IP address: 219.94.192.30.
Other host names including shinurayasu.com, 2-stage.jp, sig.jp, clelu.com and 2ka.jp share IP numbers with koshiken.com.
Name Servers
koshiken.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
koshiken.com at least partially shares name servers with other domains, including murasakigc.com, bocagrande.jp, robert-koda.com, vinylchamber.sakura.ne.jp and openavi.com.
These name servers are often used together with dns.sakura.ad.jp.
Hostnames with a single IP:
master.dns.ne.jp points to: 210.224.172.18.
ns1.dns.ne.jp points to: 61.211.236.1.
ns2.dns.ne.jp points to: 133.167.21.1.
Mail Servers
A single mail server handles koshiken.com.
koshiken.com points to a single IP: 219.94.192.30.