four9.jp - robtex.com
four9.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 153.122.13.50🇯🇵 AS131921153.122.0.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| PTR | vps001485.tmm.jp | ||||||
| NS | dns4.tsukuba.ad.jp ⭐ | ||||||
| A | 153.122.2.46🇯🇵 AS131921153.122.0.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| PTR | dns4.tsukuba.ad.jp | ||||||
| NS | dns5.tsukuba.ad.jp | ||||||
| A | 153.122.20.21🇯🇵 AS131921153.122.16.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| PTR | dns5.tsukuba.ad.jp | ||||||
| MX | vps001485.tmm.jp ⭐ | ||||||
| A | 153.122.13.50🇯🇵 AS131921153.122.0.0/20 GMO CLOUD K.K. GMO GlobalSign Holdings K.K. | ||||||
| PTR | vps001485.tmm.jp | ||||||
| TXT | v=spf1 +ip4:180.235.254.240 +ip4:153.122.13.50 ~all | ||||||
| SOA | dns4.tsukuba.ad.jphostmaster@tsukuba.ad.jp 2021-06-18 #1 | ||||||
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=1778794202 | ||||||
Same first word
DNS History
8 records (4 active, 4 former)
○NSdns1.tsukuba.ad.jp2015-07-14 → 2018-06-11 · 4 obs
● 2018-06-11 08:58:18
○ 2026-02-27 22:42:16
○ 2026-05-14 21:50:16
○NSdns2.tsukuba.ad.jp2015-07-14 → 2018-06-11 · 4 obs
● 2018-06-11 08:58:18
○ 2026-02-27 22:42:16
○ 2026-05-14 21:50:16
●NSdns4.tsukuba.ad.jp2026-02-27 → 2026-05-14 · 3 obs
● 2026-02-27 22:42:16
● 2026-05-14 21:50:16
●NSdns5.tsukuba.ad.jp2026-02-27 → 2026-05-14 · 3 obs
● 2026-02-27 22:42:16
● 2026-05-14 21:50:16
○MXmail.four9.jp2015-07-14 → 2018-06-11 · 4 obs
● 2018-06-11 08:58:18
○ 2026-02-27 22:42:16
○ 2026-05-14 21:50:16
●MXvps001485.tmm.jp2026-02-27 → 2026-05-14 · 3 obs
● 2026-02-27 22:42:16
● 2026-05-14 21:50:16
●A153.122.13.502026-02-27 → 2026-05-14 · 3 obs
● 2026-02-27 22:42:16
● 2026-05-14 21:50:16
○A180.235.254.2402015-07-14 → 2018-06-11 · 4 obs
● 2018-06-11 08:58:18
○ 2026-02-27 22:42:16
○ 2026-05-14 21:50:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | e.dns.jp, g.dns.jp, c.dns.jp, a.dns.jp... | - |
| four9.jp | dns5.tsukuba.ad.jp, dns4.tsukuba.ad.jp | 2 records |
✅ Authoritative Response
Server:153.122.20.21
NS records: dns5.tsukuba.ad.jp, dns4.tsukuba.ad.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for four9.jp (unsigned zone)
⏱️ Timing
Total: 1815ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 153.122.13.50 |
| NS | 2 | dns4.tsukuba.ad.jp, dns5.tsukuba.ad.jp |
| MX | 1 | vps001485.tmm.jp (pri: 10) |
| TXT | 1 | v=spf1 +ip4:180.235.254.240 +ip4:153.122 |
| SOA | 1 | dns4.tsukuba.ad.jp hostmaster.tsukuba.ad |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (dns4.tsukuba.ad.jp, dns5.tsukuba.ad.jp)
Analysis
IP Addresses
four9.jp resolves to a single IP: 153.122.13.50.
Other host names, for instance mail.komei.co.jp, komei.co.jp, www.e-bosai.jp, vps001485.tmm.jp and www.komei.co.jp share IP numbers with four9.jp.
Name Servers
four9.jp has two name servers: dns4.tsukuba.ad.jp and dns5.tsukuba.ad.jp.
four9.jp shares the same name server setup as other domains, for example e-musashino.jp, i-step.org, kasama.jp, e-mito.jp and inter.or.jp.
four9.jp partially shares name servers with other domains, for instance tsukuba.ad.jp.
Host names with a single IP:
dns4.tsukuba.ad.jp points to 153.122.2.46
dns5.tsukuba.ad.jp points to 153.122.20.21
Mail Servers
four9.jp is handled by a single mail server, vps001485.tmm.jp.
four9.jp shares the same mail server setup as other domains, for instance komei.co.jp and e-bosai.jp.
Host name vps001485.tmm.jp points to IP 153.122.13.50.