first3.jp - dns.ninja
first3.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 75.2.15.28🇺🇸 Amazon75.2.0.0/20 | ||||||
| PTR | ae1c5e6a224228982.awsglobalaccelerator.com | ||||||
| NS | dns01.muumuu-domain.com ⭐ | ||||||
| A | 202.239.23.39🇯🇵 IDC202.239.23.0/24 Frontier Inc. | ||||||
| NS | dns02.muumuu-domain.com | ||||||
| A | 160.251.249.62🇯🇵 GMOOSK-NET160.251.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan | ||||||
| MX | mail.first3.jp ⭐ | ||||||
| A | 15.152.141.110🇯🇵 Amazon15.152.0.0/16 EC2 KIX prefix | ||||||
| PTR | first3.jp | ||||||
| TXT | v=spf1 ip4:15.152.141.110 ip4:18.180.56.79 ip4:52.199.116.48 ip4:15.152.247.2... | ||||||
| SOA | dns01.muumuu-domain.compostmaster@first3.jp serial=1782092495 | ||||||
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=1783233003 | ||||||
PTR for
Subdomains
mail.first3.jp |
Same first word
Similar names
DNS History
4 records (4 active, 0 former)
●NSdns01.muumuu-domain.com2026-02-26 → 2026-07-05 · 2 obs
● 2026-07-05 06:50:56
●NSdns02.muumuu-domain.com2026-02-26 → 2026-07-05 · 2 obs
● 2026-07-05 06:50:56
●MXmail.first3.jp2026-02-26 → 2026-07-05 · 2 obs
● 2026-07-05 06:50:56
●A75.2.15.282026-02-26 → 2026-07-05 · 2 obs
● 2026-07-05 06:50:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp... | - |
| first3.jp | dns02.muumuu-domain.com, dns01.muumuu-domain.com | - |
✅ Authoritative Response
Server:160.251.249.62
NS records: dns02.muumuu-domain.com, dns01.muumuu-domain.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for first3.jp (unsigned zone)
⏱️ Timing
Total: 939ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 75.2.15.28 |
| NS | 2 | dns02.muumuu-domain.com, dns01.muumuu-domain.com |
| MX | 1 | mail.first3.jp (pri: 20) |
| TXT | 1 | v=spf1 ip4:15.152.141.110 ip4:18.180.56. |
| SOA | 1 | dns01.muumuu-domain.com postmaster.first |
Analysis
Hierarchy
first3.jp serves as the parent of mail.first3.jp.
IP Addresses
first3.jp has exactly one IP address — 75.2.15.28.
Other host names, such as ae1c5e6a224228982.awsglobalaccelerator.com, share IP numbers with first3.jp.
Name Servers
first3.jp is delegated to two name servers: dns01.muumuu-domain.com and dns02.muumuu-domain.com.
The name server configuration of first3.jp is shared with other domains, for instance 1mg.org, kenkien.com, 3mart.biz and two others.
first3.jp has at least partial name server overlap with other domains, such as brown-mc.jp, findbase.net, iack.online and two others.
dns01.muumuu-domain.com directs to 202.239.23.39 and dns02.muumuu-domain.com directs to 160.251.249.62; each host name points to exactly one IP number.
Mail Servers
first3.jp uses one mail server — mail.first3.jp.
mail.first3.jp resolves to a single IP number: 15.152.141.110.