web4u.jp - robtex.com
web4u.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 59.106.27.144🇯🇵 SAKURA-B59.106.0.0/17 (7-0/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-14 Minami Honmachi, Chuo-ku, Osaka 541-0054, Japan | ||||||
| PTR | www1904.sakura.ne.jp | ||||||
| NS | master.dns.ne.jp ⭐ | ||||||
| A | 210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | master.dns.ne.jp | ||||||
| NS | ns1.dns.ne.jp | ||||||
| A | 61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan | ||||||
| PTR | ns1.dns.ne.jp | ||||||
| NS | ns2.dns.ne.jp | ||||||
| A | 133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan | ||||||
| PTR | ns2.dns.ne.jp | ||||||
| MX | web4u.jp ⭐ | ||||||
| A | 59.106.27.144🇯🇵 SAKURA-B59.106.0.0/17 (7-0/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-14 Minami Honmachi, Chuo-ku, Osaka 541-0054, Japan | ||||||
| PTR | www1904.sakura.ne.jp | ||||||
| TXT | v=spf1 a:www1904.sakura.ne.jp mx ~all | ||||||
| TXT | openai-domain-verification=dv-SyJfNHzrszIkoLqlduvSrTcK | ||||||
| SOA | master.dns.ne.jptech@sakura.ad.jp 2026-02-19 #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=1774611902 | ||||||
📈 Tranco rank: #352,373
MX for
web4u.jp |
Subdomains
blockbook-bitzeny.web4u.jp |
Same first word
Similar names
DNS History
5 records (5 active, 0 former)
●MXweb4u.jp2019-02-08 → 2026-03-27 · 2 obs
● 2026-03-27 12:16:54
●A59.106.27.1442019-02-08 → 2026-03-27 · 2 obs
● 2026-03-27 12:16:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | d.dns.jp, c.dns.jp, h.dns.jp, g.dns.jp... | - |
| web4u.jp | ns2.dns.ne.jp, ns1.dns.ne.jp | 2 records |
✅ Authoritative Response
Server:133.167.21.1
NS records: ns2.dns.ne.jp, ns1.dns.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for web4u.jp (unsigned zone)
⏱️ Timing
Total: 865ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 59.106.27.144 |
| NS | 2 | ns1.dns.ne.jp, ns2.dns.ne.jp |
| MX | 1 | web4u.jp (pri: 10) |
| TXT | 2 | v=spf1 a:www1904.sakura.ne.jp mx ~all, openai-domain-verification=dv-SyJfNHzrsz |
| SOA | 1 | master.dns.ne.jp tech.sakura.ad.jp |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns2.dns.ne.jp, ns1.dns.ne.jp)
Analysis
Hierarchy
The parent of blockbook-bitzeny.web4u.jp is web4u.jp.
Mail Server Role
web4u.jp serves as a mail server for web4u.jp.
IP Addresses
web4u.jp points to a single IP: 59.106.27.144.
Other host names, for instance kenpohoukaisei.sakura.ne.jp, akiyamashika-net.com, www1904.sakura.ne.jp, mail01.kokujo.jp and shinshuseiten.higashihonganji.or.jp share IP numbers with web4u.jp.
Name Servers
web4u.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.
web4u.jp partially shares name servers with other domains; examples include ocn.co.jp, howabank.co.jp, 241.16.160.in-addr.arpa, pinkpaint.net and silence-net.co.jp.
these name servers are commonly used with the name servers dns.sakura.ad.jp.
Host names with one IP number:
Host master.dns.ne.jp points to 210.224.172.18.
Host ns1.dns.ne.jp points to 61.211.236.1.
Host ns2.dns.ne.jp points to 133.167.21.1.
Mail Servers
web4u.jp is handled by a single mail server, web4u.jp.
web4u.jp points to a single IP: 59.106.27.144.