cwork.jp - dns.ninja
cwork.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 219.94.163.216🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1576.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 | cwork.jp ⭐ | ||||||
| A | 219.94.163.216🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | www1576.sakura.ne.jp | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2008-12-07 #23 | ||||||
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=1782580502 | ||||||
MX for
cwork.jp |
Same first word
cwork.cat |
cwork.space |
cwork.co.kr |
cwork.at |
cwork.store |
cwork.io |
cwork.nl |
cwork.be |
cwork.jp |
cwork.vn |
cwork.cc |
cwork.co.jp |
cwork.org |
cwork.de |
cwork.eu |
cwork.co |
Similar names
rkwco.com |
wrkco.com |
cowrk.de |
wrock.pl |
wrock.org |
kwroc.com |
crowk.com |
wrock.net |
worck.nl |
kcrow.com |
cowrk.in |
wockr.org |
wkrco.com |
wkcor.top |
cowrk.com |
wrock.com.br |
workc.co |
wrock.co.jp |
worck.dk |
wrock.ws |
DNS History
5 records (5 active, 0 former)
●MXcwork.jp2015-08-19 → 2026-06-27 · 2 obs
● 2026-06-27 17:42:44
●A219.94.163.2162015-08-19 → 2026-06-27 · 2 obs
● 2026-06-27 17:42:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | d.dns.jp, e.dns.jp, a.dns.jp, b.dns.jp... | - |
| cwork.jp | ns1.dns.ne.jp, ns2.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:61.211.236.1
NS records: ns1.dns.ne.jp, ns2.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cwork.jp (unsigned zone)
⏱️ Timing
Total: 986ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 219.94.163.216 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | cwork.jp (pri: 10) |
| 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
cwork.jp acts as its own mail server.
IP Addresses
cwork.jp points to a single IP number: 219.94.163.216.
Additional host names — cs-satoh.com, wrm.tv, fx-ex.info and two others — share IP numbers with cwork.jp.
Name Servers
DNS for cwork.jp is handled by three authoritative name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
cwork.jp shares at least some of its name servers with other domains, including little-king.jp, syuka.com, kinuasa-eye.com and two others.
These name servers are frequently seen alongside the name servers dns.sakura.ad.jp.
master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp all have one IP address each — master.dns.ne.jp directs to 210.224.172.18, ns1.dns.ne.jp directs to 61.211.236.1 and ns2.dns.ne.jp directs to 133.167.21.1.
Mail Servers
cwork.jp has a single mail server: cwork.jp itself.
cwork.jp has exactly one IP number: 219.94.163.216.