u-system.jp - robtex.com
u-system.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 133.167.113.191🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | secure21.willnet.org | ||||||
| NS | ns1.willnet.ne.jp ⭐ | ||||||
| A | 163.43.103.130🇯🇵 SAKURA-B163.43.0.0/16 (TOKYO) SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan | ||||||
| PTR | ns1.willnet.ne.jp | ||||||
| NS | ns2.willnet.ne.jp | ||||||
| A | 133.18.128.93🇯🇵 KAGOYAJAPAN133.18.0.0/16 KAGOYA Japan Inc. | ||||||
| MX | mail.u-system.jp ⭐ | ||||||
| A | 133.167.113.191🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | secure21.willnet.org | ||||||
| TXT | v=spf1 a mx include:spf01.willnet.ad.jp ~all | ||||||
| SOA | ns1.willnet.ne.jphostmaster@willnet.ne.jp 2026-01-15 #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=1778571003 | ||||||
Subdomains
Same first word
Similar names
DNS History
5 records (4 active, 1 former)
●NSns1.willnet.ne.jp2015-07-13 → 2026-05-12 · 2 obs
● 2026-05-12 07:43:16
●NSns2.willnet.ne.jp2015-07-13 → 2026-05-12 · 2 obs
● 2026-05-12 07:43:16
●MXmail.u-system.jp2015-07-13 → 2026-05-12 · 2 obs
● 2026-05-12 07:43:16
○A110.34.57.2182015-07-13 → 2017-01-01 · 4 obs
● 2017-01-01 14:34:36
○ 2026-05-08 09:36:56
○ 2026-05-12 07:43:16
●A133.167.113.1912026-05-08 → 2026-05-12 · 3 obs
● 2026-05-08 09:36:56
● 2026-05-12 07:43:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | e.dns.jp, g.dns.jp, c.dns.jp, a.dns.jp... | - |
| u-system.jp | ns2.willnet.ne.jp, ns1.willnet.ne.jp | 2 records |
✅ Authoritative Response
Server:163.43.103.130
NS records: ns2.willnet.ne.jp, ns1.willnet.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for u-system.jp (unsigned zone)
⏱️ Timing
Total: 1076ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 133.167.113.191 |
| NS | 2 | ns2.willnet.ne.jp, ns1.willnet.ne.jp |
| MX | 2 | mail.u-system.jp (pri: 0), mail.u-system.jp (pri: 10) |
| TXT | 1 | v=spf1 a mx include:spf01.willnet.ad.jp |
| SOA | 1 | ns1.willnet.ne.jp hostmaster.willnet.ne. |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.willnet.ne.jp, ns1.willnet.ne.jp)
Analysis
Hierarchy
u-system.jp is a parent of www.u-system.jp and mail.u-system.jp.
IP Addresses
u-system.jp points to a single IP address: 133.167.113.191.
Other host names such as delta-factory.com, mail.kikonsha.com, mail.kbc.ac, mail.tac-p.jp and hakuoh.net share IPs with u-system.jp.
Name Servers
Two name servers ns1.willnet.ne.jp and ns2.willnet.ne.jp handle the delegation for u-system.jp.
u-system.jp shares the same name server setup as other domains, for example 1001.jp, jgr-food.com, moonstation.jp, webps.jp and ishii-osamu.net.
u-system.jp shares name servers with other domains to some extent, including blueinc.co.jp, is-bright.com, e-sol.jp and medamaoyaji.com.
These name servers are often used together with ns1.dnsserver-jp.net and ns2.dnsserver-jp.net.
Host names with one IP number:
ns1.willnet.ne.jp points to 163.43.103.130; ns2.willnet.ne.jp points to 133.18.128.93.
Mail Servers
The mail.u-system.jp mail server handles u-system.jp.
mail.u-system.jp points to a single IP number: 133.167.113.191.