opt-brain.com - robtex.com
opt-brain.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 163.43.197.174🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan | ||||||
| PTR | www50134.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 | opt-brain.com ⭐ | ||||||
| A | 163.43.197.174🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan | ||||||
| PTR | www50134.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www50134.sakura.ne.jp mx ~all | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2024-02-09 #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=1774956872 | ||||||
MX for
opt-brain.com |
Same first word
opt-brain.com |
Similar names
DNS History
9 records (5 active, 4 former)
○NSns1.naviservers.net2009-01-12 → 2018-08-16 · 3 obs
● 2018-08-16 03:52:56
○ 2026-03-31 11:44:46
○NSns2.naviservers.net2009-01-12 → 2018-08-16 · 3 obs
● 2018-08-16 03:52:56
○ 2026-03-31 11:44:46
●MXopt-brain.com2009-01-12 → 2026-03-31 · 2 obs
● 2026-03-31 11:44:46
●A163.43.197.1742026-03-31 → 2026-03-31 · 2 obs
● 2026-03-31 11:44:46
○A202.218.16.1132018-08-16 → 2018-08-16 · 3 obs
● 2018-08-16 03:52:56
○ 2026-03-31 11:44:46
○A202.218.98.2122009-01-12 → 2017-01-23 · 4 obs
● 2017-01-23 10:48:48
○ 2018-08-16 03:52:56
○ 2026-03-31 11:44:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | h.gtld-servers.net, a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net... | - |
| opt-brain.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 opt-brain.com (unsigned zone)
⏱️ Timing
Total: 1304ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 163.43.197.174 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | opt-brain.com (pri: 10) |
| TXT | 1 | v=spf1 a:www50134.sakura.ne.jp mx ~all |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
Analysis
Mail Server Role
opt-brain.com serves as a mail server for opt-brain.com.
IP Addresses
opt-brain.com points to a single IP: 163.43.197.174.
Other host names, for instance castwan.com, pea-eg.com, office-make.com, true.co.jp and kotobuki-en.com share IP numbers with opt-brain.com.
Name Servers
opt-brain.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
opt-brain.com partially shares name servers with other domains; examples include phymare.com, gamingdevice.net, u-at.sakura.ne.jp, mizuki-friend.com and nagasue.com.
these name servers are commonly used with the name servers dns.sakura.ad.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
opt-brain.com is handled by a single mail server, opt-brain.com.
opt-brain.com points to a single IP: 163.43.197.174.