kouba.jp - robtex.com
kouba.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 219.94.163.168🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1528.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 | kouba.jp ⭐ | ||||||
| A | 219.94.163.168🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1528.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www1528.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2016-02-24 #17 | ||||||
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=1786597202 | ||||||
MX for
kouba.jp |
Same first word
kouba.name |
kouba.cz |
kouba.jp |
kouba.us |
kouba.co.uk |
kouba.com |
kouba.biz |
kouba.info |
kouba.xyz |
kouba.at |
kouba.net |
kouba.it |
kouba.de |
Similar names
DNS History
8 records (5 active, 3 former)
●NSmaster.dns.ne.jp2016-06-17 → 2026-08-13 · 3 obs
● 2016-06-17 23:59:56
● 2026-08-13 05:42:10
○NSns.madori.co.jp2015-05-22 → 2016-02-11 · 4 obs
● 2016-02-11 04:12:06
○ 2016-06-17 23:59:56
○ 2026-08-13 05:42:10
●NSns1.dns.ne.jp2016-06-17 → 2026-08-13 · 3 obs
● 2016-06-17 23:59:56
● 2026-08-13 05:42:10
●NSns2.dns.ne.jp2016-06-17 → 2026-08-13 · 3 obs
● 2016-06-17 23:59:56
● 2026-08-13 05:42:10
●MXkouba.jp2016-06-17 → 2026-08-13 · 3 obs
● 2016-06-17 23:59:56
● 2026-08-13 05:42:10
○MXmail.kouba.jp2015-05-22 → 2016-02-11 · 4 obs
● 2016-02-11 04:12:06
○ 2016-06-17 23:59:56
○ 2026-08-13 05:42:10
○A202.218.35.1162015-05-22 → 2016-02-11 · 4 obs
● 2016-02-11 04:12:06
○ 2016-06-17 23:59:56
○ 2026-08-13 05:42:10
●A219.94.163.1682016-06-17 → 2026-08-13 · 3 obs
● 2016-06-17 23:59:56
● 2026-08-13 05:42:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | b.dns.jp, a.dns.jp, f.dns.jp, h.dns.jp... | - |
| kouba.jp | ns2.dns.ne.jp, ns1.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:133.167.21.1
NS records: ns2.dns.ne.jp, ns1.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for kouba.jp (unsigned zone)
⏱️ Timing
Total: 1976ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 219.94.163.168 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | kouba.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www1528.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.dns.ne.jp, ns1.dns.ne.jp)
Analysis
Mail Server Role
kouba.jp acts as its own mail server.
IP Addresses
kouba.jp points to a single IP number: 219.94.163.168.
Additional host names — dolcesax.com, jccg.jp, fukada.co.jp and two others — share IP numbers with kouba.jp.
Name Servers
kouba.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
kouba.jp has at least partial name server overlap with other domains, such as nurse.to, dhlife.net, msv-im05844.sakura.ne.jp and two others.
It is common to find these name servers paired with the name servers dns.sakura.ad.jp.
master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp each resolve to a single IP address: master.dns.ne.jp resolves to 210.224.172.18, ns1.dns.ne.jp resolves to 61.211.236.1 and ns2.dns.ne.jp resolves to 133.167.21.1.
Mail Servers
kouba.jp has a single mail server: kouba.jp itself.
kouba.jp resolves to a single IP number: 219.94.163.168.