work-brain.co.jp - robtex.com
work-brain.co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 183.90.183.21🇯🇵 DRNET183.90.176.0/21 | ||||||
| PTR | c20.hpms1.jp | ||||||
| NS | ns1.value-domain.com ⭐ | ||||||
| A | 172.64.52.38🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| A | 172.64.52.161🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.value-domain.com | ||||||
| A | 172.64.53.3🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| A | 172.64.53.115🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| MX | work-brain.co.jp ⭐ | ||||||
| A | 183.90.183.21🇯🇵 DRNET183.90.176.0/21 | ||||||
| PTR | c20.hpms1.jp | ||||||
| TXT | v=spf1 ip4:183.90.183.21 include:mxr.valueserver.jp ~all | ||||||
| SOA | ns1.value-domain.comhostmaster@work-brain.co.jp 2020-08-26 #23 | ||||||
co.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | co.jp. | ||||||
MX for
work-brain.co.jp |
Same first word
work-brain.co.jp |
Similar names
DNS History
8 records (4 active, 4 former)
○NSdns01.xseed.co.jp2015-08-10 → 2017-03-24 · 4 obs
● 2017-03-24 08:47:36
○ 2026-02-18 12:07:50
○ 2026-03-27 13:11:38
○NSdns02.xseed.co.jp2015-08-10 → 2017-03-24 · 4 obs
● 2017-03-24 08:47:36
○ 2026-02-18 12:07:50
○ 2026-03-27 13:11:38
●NSns1.value-domain.com2026-02-18 → 2026-03-27 · 3 obs
● 2026-02-18 12:07:50
● 2026-03-27 13:11:38
●NSns2.value-domain.com2026-02-18 → 2026-03-27 · 3 obs
● 2026-02-18 12:07:50
● 2026-03-27 13:11:38
●MXwork-brain.co.jp2015-08-10 → 2026-03-27 · 2 obs
● 2026-03-27 13:11:38
○A153.128.36.1862017-03-24 → 2017-03-24 · 4 obs
● 2017-03-24 08:47:36
○ 2026-02-18 12:07:50
○ 2026-03-27 13:11:38
○A175.111.84.1362015-08-10 → 2016-07-27 · 4 obs
● 2016-07-27 13:40:32
○ 2017-03-24 08:47:36
○ 2026-03-27 13:11:38
●A183.90.183.212026-02-18 → 2026-03-27 · 3 obs
● 2026-02-18 12:07:50
● 2026-03-27 13:11:38
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| work-brain.co.jp | ns2.value-domain.com, ns1.value-domain.com | - |
✅ Authoritative Response
Server:172.64.52.161
NS records: ns2.value-domain.com, ns1.value-domain.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for work-brain.co.jp (unsigned zone)
⏱️ Timing
Total: 1115ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 183.90.183.21 |
| NS | 2 | ns2.value-domain.com, ns1.value-domain.com |
| MX | 1 | work-brain.co.jp (pri: 10) |
| TXT | 1 | v=spf1 ip4:183.90.183.21 include:mxr.val |
| SOA | 1 | ns1.value-domain.com hostmaster.work-bra |
Analysis
Mail Server Role
work-brain.co.jp serves as the mail server for work-brain.co.jp.
IP Addresses
work-brain.co.jp points to a single IP address: 183.90.183.21.
Other host names such as smtp.maruma.net, arimotoshika.com, www.akikoubou.co.jp, mainosato-naika.com and als303.com share IP numbers with work-brain.co.jp.
Name Servers
work-brain.co.jp is delegated to two name servers: ns1.value-domain.com and ns2.value-domain.com.
work-brain.co.jp uses the same name server setup as other domains, including 6999.jp, nomurashika.com, aod-co-ltd.com, aihaland.com and suginotowel.co.jp.
At least part of the name servers for work-brain.co.jp are shared with other domains, for instance kck.jp, kimamalife.com, joah-girls.com, shoda.tk and cometgaze.net.
These name servers are commonly used together with the name servers ns3.value-domain.com, ns4.value-domain.com, ns5.value-domain.com, ns11.value-domain.com, ns12.value-domain.com and ns13.value-domain.com.
Host names with two IP numbers:
ns1.value-domain.com points to 172.64.52.38 and 172.64.52.161.
ns2.value-domain.com points to 172.64.53.3 and 172.64.53.115.
Mail Servers
Mail for work-brain.co.jp is handled by a single mail server, work-brain.co.jp.
Host work-brain.co.jp points to IP 183.90.183.21.