f-cas.com - robtex.com
f-cas.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 133.167.8.141🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | www5201.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 | f-cas.com ⭐ | ||||||
| A | 133.167.8.141🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | www5201.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www5201.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2023-11-01 #0 | ||||||
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=1778668186 | ||||||
MX for
f-cas.com |
Same first word
f-cas.com |
Similar names
DNS History
5 records (5 active, 0 former)
●MXf-cas.com2026-03-18 → 2026-05-13 · 2 obs
● 2026-05-13 10:31:22
●A133.167.8.1412026-03-18 → 2026-05-13 · 2 obs
● 2026-05-13 10:31:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| f-cas.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 f-cas.com (unsigned zone)
⏱️ Timing
Total: 2999ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 133.167.8.141 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | f-cas.com (pri: 10) |
| TXT | 1 | v=spf1 a:www5201.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
Analysis
Mail Server Role
f-cas.com serves as a mail server for f-cas.com.
IP Addresses
f-cas.com points to a single IP: 133.167.8.141.
Other host names, for instance asahitochitatemono.co.jp, mail.hinata.net, osirase.sakura.ne.jp, okurinet.sakura.ne.jp and a-p-ccom.sakura.ne.jp share IP numbers with f-cas.com.
Name Servers
f-cas.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
f-cas.com partially shares name servers with other domains; examples include fertility-omiya.com, officenagao.com, sonyouin.biz, kukulu.co.jp and westdrive.co.jp.
Host names with one IP number:
Host master.dns.ne.jp points to 210.224.172.18.
Host ns1.dns.ne.jp points to 61.211.236.1.
Host ns2.dns.ne.jp points to 133.167.21.1.
Mail Servers
f-cas.com is handled by a single mail server, f-cas.com.
f-cas.com points to a single IP: 133.167.8.141.