brain.jp - robtex.com
brain.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 49.212.65.203🇯🇵 SAKURA-A49.212.65.0/24 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka-shi, Osaka 530-0011, Japan | ||||||
| PTR | 203.65.212.49.static.www2875m.sakura.ne.jp | ||||||
| NS | 01.dnsv.jp ⭐ | ||||||
| A | 2400:8500:3300::53🇯🇵 GMO-DNS2400:8500:3300::/48 GMO Internet,inc. | ||||||
| PTR | 01.dnsv.jp | ||||||
| A | 157.7.32.53🇯🇵 GMO-DNS157.7.32.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 01.dnsv.jp | ||||||
| NS | 02.dnsv.jp | ||||||
| A | 157.7.33.53🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 02.dnsv.jp | ||||||
| NS | 03.dnsv.jp ⚠️ Not in parent delegation | ||||||
| A | 2400:8500:3000::53🇯🇵 GMO-DNS2400:8500:3000::/48 GMO Internet,inc. | ||||||
| PTR | 03.dnsv.jp | ||||||
| A | 157.7.34.53🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 03.dnsv.jp | ||||||
| NS | 04.dnsv.jp ⚠️ Not in parent delegation | ||||||
| A | 2400:8500:3fff::53🇯🇵 GMO-DNS2400:8500:3fff::/48 GMO Internet,inc. | ||||||
| PTR | 04.dnsv.jp | ||||||
| A | 157.7.35.53🇯🇵 GMO-DNS157.7.35.0/24 GMO Internet,inc. Network-Team. | ||||||
| PTR | 04.dnsv.jp | ||||||
| MX | smtp.brain.jp ⭐ | ||||||
| A | 49.212.65.203🇯🇵 SAKURA-A49.212.65.0/24 (ISHIKARI) SAKURA Internet // HOKKAIDO JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka-shi, Osaka 530-0011, Japan | ||||||
| PTR | 203.65.212.49.static.www2875m.sakura.ne.jp | ||||||
| TXT | MS=ms37851475 | ||||||
| TXT | v=spf1 +ip4:49.212.65.203/32 +ip4:49.212.65.75/32 +ip4:153.120.85.146/32 +ip4... | ||||||
| SOA | 01.dnsv.jphostmaster@dnsv.jp serial=1754033803 | ||||||
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=1780397102 | ||||||
Subdomains
Same first word
Similar names
DNS History
6 records (6 active, 0 former)
●MXsmtp.brain.jp2015-07-11 → 2026-06-02 · 2 obs
● 2026-06-02 11:22:04
●A49.212.65.2032026-03-12 → 2026-06-02 · 2 obs
● 2026-06-02 11:22:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | b.dns.jp, e.dns.jp, h.dns.jp, a.dns.jp... | - |
| brain.jp | 02.dnsv.jp, 01.dnsv.jp | 3 records |
✅ Authoritative Response
Server:157.7.33.53
NS records: 02.dnsv.jp, 01.dnsv.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for brain.jp (unsigned zone)
⏱️ Timing
Total: 884ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 49.212.65.203 |
| NS | 4 | 01.dnsv.jp, 02.dnsv.jp... |
| MX | 1 | smtp.brain.jp (pri: 10) |
| TXT | 2 | MS=ms37851475, v=spf1 +ip4:49.212.65.203/32 +ip4:49.212 |
| SOA | 1 | 01.dnsv.jp hostmaster.dnsv.jp |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (02.dnsv.jp, 01.dnsv.jp, 01.dnsv.jp)
Analysis
Hierarchy
brain.jp serves as the parent of www.brain.jp and smtp.brain.jp.
IP Addresses
brain.jp has exactly one IP address — 49.212.65.203.
smtp.brain.jp, eleshin.org, 203.65.212.49.static.www2875m.sakura.ne.jp plus two other host names have IP numbers in common with brain.jp.
Name Servers
brain.jp carries NS records pointing to 4 name servers: 01.dnsv.jp, 02.dnsv.jp, 03.dnsv.jp and 04.dnsv.jp.
brain.jp has at least partial name server overlap with other domains, such as techfirm.jp, chathelp.net, aimenext.com and two others.
Host names pointing to two IP addresses:
01.dnsv.jp maps to two IP addresses — 157.7.32.53 and 2400:8500:3300::53.
03.dnsv.jp maps to two IP addresses — 157.7.34.53 and 2400:8500:3000::53.
04.dnsv.jp maps to two IP addresses — 157.7.35.53 and 2400:8500:3fff::53.
Host names with one IP number:
02.dnsv.jp points to the IP address 157.7.33.53.
Mail Servers
brain.jp uses one mail server — smtp.brain.jp.
There is one IP number for smtp.brain.jp: 49.212.65.203.