java.com.tw - robtex.com
java.com.tw
| DNSSEC | ⚠️ Not signed | ||||||
| A | 220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| NS | dns1.f1.com.tw ⭐ | ||||||
| A | 218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| PTR | sp234.f1.com.tw | ||||||
| NS | dns2.f1.com.tw | ||||||
| A | 220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| MX | java.com.tw ⭐ | ||||||
| A | 220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| MX | www.java.com.tw(14) | ||||||
| A | 220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd. | ||||||
| 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=2006358088 | ||||||
MX for
java.com.tw |
Subdomains
www.java.com.tw |
Same first word
Similar names
DNS History
8 records (5 active, 3 former)
●MXjava.com.tw2015-08-26 → 2026-06-11 · 2 obs
● 2026-06-11 19:17:52
●MXwww.java.com.tw2015-08-26 → 2026-06-11 · 2 obs
● 2026-06-11 19:17:52
●A220.228.6.212026-04-18 → 2026-06-11 · 3 obs
● 2026-04-18 16:47:24
● 2026-06-11 19:17:52
○A220.228.6.422018-01-29 → 2018-01-29 · 4 obs
● 2018-01-29 00:06:06
○ 2026-03-27 15:09:06
○ 2026-06-11 19:17:52
○A220.228.6.592015-10-26 → 2026-04-13 · 8 obs
● 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
○ 2026-06-11 19:17:52
○A61.66.228.472015-08-26 → 2015-09-19 · 4 obs
● 2015-09-19 14:55:58
○ 2015-10-26 11:16:58
○ 2026-06-11 19:17:52
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| tw | d.dns.tw, a.dns.tw, g.dns.tw, b.dns.tw... | 16 records |
| java.com.tw | dns1.f1.com.tw, dns2.f1.com.tw | 2 records |
✅ Authoritative Response
Server:218.32.213.234
NS records: dns1.f1.com.tw, dns2.f1.com.tw
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for java.com.tw (unsigned zone)
⏱️ Timing
Total: 1335ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 220.228.6.21 |
| NS | 2 | dns1.f1.com.tw, dns2.f1.com.tw |
| MX | 2 | www.java.com.tw (pri: 14), java.com.tw (pri: 10) |
| SOA | 1 | dns1.f1.com.tw ohgo.ms23.hinet.net |
📌 Glue Records Collected
Total: 18
In-bailiwick: 14 (a.dns.tw, b.dns.tw, c.dns.tw...)
Out-of-bailiwick: 4 (anytld.apnic.net, anytld.apnic.net, dns2.f1.com.tw...)
Analysis
Hierarchy
java.com.tw serves as the parent of www.java.com.tw.
Mail Server Role
java.com.tw serves as a mail server for java.com.tw.
www.java.com.tw is often seen acting as a mail server in combination with java.com.tw.
IP Addresses
java.com.tw has exactly one IP address — 220.228.6.21.
7775m.com, 90691ut.com, www.7755e.com plus two other host names have IP numbers in common with java.com.tw.
Name Servers
DNS delegation for java.com.tw points to two name servers: dns1.f1.com.tw and dns2.f1.com.tw.
The name server configuration of java.com.tw is shared with other domains, for instance live176.com, capatina.com.tw, f-line.com.tw and two others.
java.com.tw has at least partial name server overlap with other domains, such as kiss225.com, ez300.com, 777-match.com and two others.
sp234.f1.com.tw, ns1.oknet.tw and ns2.oknet.tw — plus 3 other name servers — are commonly paired with these name servers.
dns1.f1.com.tw directs to 218.32.213.234 and dns2.f1.com.tw directs to 220.228.6.17; each host name points to exactly one IP number.
Mail Servers
java.com.tw uses two mail servers, java.com.tw and www.java.com.tw.
Both java.com.tw and www.java.com.tw have a single IP address, 220.228.6.21, and share it.
Host names pointing to 220.228.6.21 IP addresses: java.com.tw and www.java.com.tw.