java.com.tw - dns.ninja
java.com.tw
| DNSSEC | ⚠️ Not signed | ||||||
| A | 220.228.6.21 | ||||||
| NS | dns1.f1.com.tw ⭐ | ||||||
| NS | dns2.f1.com.tw | ||||||
| MX | java.com.tw ⭐ | ||||||
| A | 220.228.6.21 | ||||||
| MX | www.java.com.tw(14) | ||||||
| SOA | dns1.f1.com.twohgo@ms23.hinet.net 2000-11-01 #8 | ||||||
com.tw
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.twnic.net.tw ⭐ | ||||||
| NS | anytld.apnic.net | ||||||
| NS | b.twnic.net.tw | ||||||
| NS | c.twnic.net.tw | ||||||
| NS | d.twnic.net.tw | ||||||
| NS | e.twnic.net.tw | ||||||
| NS | f.twnic.net.tw | ||||||
| NS | g.twnic.net.tw | ||||||
| NS | h.dns.tw | ||||||
| NS | h.twnic.net.tw | ||||||
| SOA | a.twnic.net.twsnw@twnic.net.tw serial=2006384981 | ||||||
MX for
java.com.tw |
Subdomains
www.java.com.tw |
DNS History
8 records (5 active, 3 former)
●MXjava.com.tw2015-08-26 → 2026-07-23 · 2 obs
● 2015-08-26 11:32:00
● 2026-07-23 20:38:00
● 2026-07-23 20:38:00
●MXwww.java.com.tw2015-08-26 → 2026-07-23 · 2 obs
● 2015-08-26 11:32:00
● 2026-07-23 20:38:00
● 2026-07-23 20:38:00
●A220.228.6.212026-04-18 → 2026-07-23 · 3 obs
○ 2026-04-13 02:17:02
● 2026-04-18 16:47:24
● 2026-07-23 20:38:00
● 2026-04-18 16:47:24
● 2026-07-23 20:38:00
○A220.228.6.422018-01-29 → 2018-01-29 · 4 obs
○ 2017-07-09 23:29:38
● 2018-01-29 00:06:06
○ 2026-03-27 15:09:06
○ 2026-07-23 20:38:00
● 2018-01-29 00:06:06
○ 2026-03-27 15:09:06
○ 2026-07-23 20:38:00
○A220.228.6.592015-10-26 → 2026-04-13 · 8 obs
○ 2015-09-19 14:55:58
● 2015-10-26 11:16:58
● 2017-07-09 23:29:38
○ 2018-01-29 00:06:06
● 2026-03-27 15:09:06
● 2026-04-13 02:17:02
○ 2026-04-18 16:47:24
○ 2026-07-23 20:38:00
● 2015-10-26 11:16:58
● 2017-07-09 23:29:38
○ 2018-01-29 00:06:06
● 2026-03-27 15:09:06
● 2026-04-13 02:17:02
○ 2026-04-18 16:47:24
○ 2026-07-23 20:38:00
○A61.66.228.472015-08-26 → 2015-09-19 · 4 obs
● 2015-08-26 11:32:00
● 2015-09-19 14:55:58
○ 2015-10-26 11:16:58
○ 2026-07-23 20:38:00
● 2015-09-19 14:55:58
○ 2015-10-26 11:16:58
○ 2026-07-23 20:38:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | a.dns.tw, b.dns.tw, c.dns.tw, d.dns.tw... | - |
| java.com.tw | dns2.f1.com.tw, dns1.f1.com.tw | 2 records |
✅ Authoritative Response
Server:218.32.213.234
NS records: dns2.f1.com.tw, dns1.f1.com.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for java.com.tw (unsigned zone)
⏱️ Timing
Total: 1681ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 220.228.6.21 |
| NS | 2 | dns2.f1.com.tw, dns1.f1.com.tw |
| MX | 2 | java.com.tw (pri: 10), www.java.com.tw (pri: 14) |
| SOA | 1 | dns1.f1.com.tw ohgo.ms23.hinet.net |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (dns2.f1.com.tw, dns1.f1.com.tw)
Analysis
Hierarchy
java.com.tw is the parent zone for www.java.com.tw.
Mail Server Role
java.com.tw acts as its own mail server.
www.java.com.tw is a mail server commonly deployed alongside java.com.tw.
IP Addresses
java.com.tw points to a single IP number: 220.228.6.21.
Name Servers
Two name servers handle the delegation for java.com.tw: dns1.f1.com.tw and dns2.f1.com.tw.
Mail Servers
java.com.tw is handled by two mail servers, java.com.tw and www.java.com.tw.
Host names pointing to a single IP address:
The hostname java.com.tw resolves to 220.228.6.21.