cstudies.co.jp - robtex.com
cstudies.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 202.181.99.29🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www309.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 | cstudies.co.jp ⭐ | ||||||
| A | 202.181.99.29🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www309.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www309.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2016-11-21 #11 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
MX for
cstudies.co.jp |
Same first word
Similar names
cdsuites.com |
situsedc.com |
desicuts.net |
dcsuites.com |
seductis.com |
icestuds.ca |
ductsies.com |
secudist.com |
cestudis.it |
desicuts.com |
DNS History
5 records (5 active, 0 former)
●MXcstudies.co.jp2019-12-13 → 2026-08-14 · 2 obs
● 2026-08-14 12:19:46
●A202.181.99.292019-12-13 → 2026-08-14 · 2 obs
● 2026-08-14 12:19:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| cstudies.co.jp | ns1.dns.ne.jp, ns2.dns.ne.jp | 2 records |
✅ 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 cstudies.co.jp (unsigned zone)
⏱️ Timing
Total: 1007ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 202.181.99.29 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | cstudies.co.jp (pri: 10) |
| TXT | 1 | v=spf1 a:www309.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)
Analysis
Mail Server Role
cstudies.co.jp acts as its own mail server.
IP Addresses
cstudies.co.jp points to a single IP number: 202.181.99.29.
Additional host names — betlemclub.com, fukuda-yamikin-soudan.jp, dgames.jp and two others — share IP numbers with cstudies.co.jp.
Name Servers
cstudies.co.jp carries NS records delegating to master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
cstudies.co.jp shares at least some of its name servers with other domains, including msv-im10214.sakura.ne.jp, musigrou.com, msv-im06742.sakura.ne.jp and two others.
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 — each hostname maps to exactly one IP address.
Mail Servers
cstudies.co.jp has a single mail server: cstudies.co.jp itself.
cstudies.co.jp carries a single IP number, which is 202.181.99.29.