firstone.jp - robtex.com
firstone.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 114.17.21.142🇯🇵 KDDI114.17.0.0/16 | ||||||
| PTR | dns14.n-server.com | ||||||
| NS | ns.firstone.jp ⭐ ⚠️ Not in parent delegation | ||||||
| A | 114.17.21.142🇯🇵 KDDI114.17.0.0/16 | ||||||
| PTR | dns14.n-server.com | ||||||
| NS | dns136.n-server.com ⚠️ Not in zone NS records | ||||||
| A | 114.17.21.136🇯🇵 KDDI114.17.0.0/16 | ||||||
| PTR | dns136.n-server.com | ||||||
| NS | dns14.n-server.com ⚠️ Not in zone NS records | ||||||
| A | 114.17.21.142🇯🇵 KDDI114.17.0.0/16 | ||||||
| PTR | dns14.n-server.com | ||||||
| MX | mail.firstone.jp ⭐ | ||||||
| A | 114.17.21.142🇯🇵 KDDI114.17.0.0/16 | ||||||
| PTR | dns14.n-server.com | ||||||
| TXT | v=spf1 +a +mx -all | ||||||
| SOA | ns.firstone.jpplesk@purenic.jp 2025-10-01 #2 | ||||||
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=1776096003 | ||||||
Subdomains
Same first word
firstone.net |
firstone.info |
firstone.ru |
firstone.shop |
firstone.in |
firstone.com.cn |
firstone.ca |
firstone.de |
firstone.eu |
firstone.se |
firstone.co.th |
firstone.jp |
firstone.org |
firstone.it |
firstone.co |
firstone.ch |
Similar names
DNS History
6 records (5 active, 1 former)
●NSdns136.n-server.com2026-03-25 → 2026-04-13 · 3 obs
● 2026-03-25 17:16:16
● 2026-04-13 16:38:34
●NSdns14.n-server.com2026-03-25 → 2026-04-13 · 3 obs
● 2026-03-25 17:16:16
● 2026-04-13 16:38:34
●NSns.firstone.jp2015-06-22 → 2026-04-13 · 2 obs
● 2026-04-13 16:38:34
●MXmail.firstone.jp2015-06-22 → 2026-04-13 · 2 obs
● 2026-04-13 16:38:34
○A106.186.69.112015-06-22 → 2018-09-24 · 4 obs
● 2018-09-24 09:55:26
○ 2026-03-25 17:16:16
○ 2026-04-13 16:38:34
●A114.17.21.1422026-03-25 → 2026-04-13 · 3 obs
● 2026-03-25 17:16:16
● 2026-04-13 16:38:34
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | e.dns.jp, c.dns.jp, a.dns.jp, h.dns.jp... | - |
| firstone.jp | dns136.n-server.com, dns14.n-server.com | - |
✅ Authoritative Response
Server:114.17.21.142
NS records: dns136.n-server.com, dns14.n-server.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for firstone.jp (unsigned zone)
⏱️ Timing
Total: 1326ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 114.17.21.142 |
| NS | 1 | ns.firstone.jp |
| MX | 1 | mail.firstone.jp (pri: 10) |
| TXT | 1 | v=spf1 +a +mx -all |
| SOA | 1 | ns.firstone.jp plesk.purenic.jp |
Analysis
Hierarchy
firstone.jp is parent of mail.firstone.jp and ns.firstone.jp.
IP Addresses
firstone.jp points to a single IP number: 114.17.21.142.
other host names for instance mail.waterlily-lymph.com, hayashi-ichigo.com, makoto-sekkotsuin.com, junesu.jp and haruru-ah.com share IP numbers with firstone.jp.
Name Servers
firstone.jp is delegated to three name servers: dns136.n-server.com, dns14.n-server.com and ns.firstone.jp.
firstone.jp at least partially shares name servers with other domains, for instance neonato.co.jp, web-c-one.com, oseko-naika.com, s-toukouji.or.jp and vegehana-farm.com.
These name servers are often used together with the name servers dns10.n-server.com, dns15.n-server.com, dns12.n-server.com, dns19.n-server.com, dns5.n-server.com, dns20.n-server.com, dns16.n-server.com, dns3.n-server.com, p03ns11.puretopure.jp and dns7.n-server.com.
Host names with a single IP:
dns136.n-server.com points to 114.17.21.136.
dns14.n-server.com points to 114.17.21.142.
ns.firstone.jp points to 114.17.21.142.
Host names that point to 114.17.21.142: dns14.n-server.com and ns.firstone.jp.
Mail Servers
firstone.jp is handled by a single mail server, mail.firstone.jp.
Host name mail.firstone.jp points to IP address 114.17.21.142.