java.com.tw - dns.ninja

java.com.tw

DNSSEC⚠️ Not signed
A220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.
NSdns1.f1.com.tw ⭐
A218.32.213.234🇹🇼 NCIC-TW218.32.192.0/19 New Century InfoComm Tech Co., Ltd.
PTRsp234.f1.com.tw
NSdns2.f1.com.tw
A220.228.6.17🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.
MXjava.com.tw ⭐
A220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.
MXwww.java.com.tw(14)
A220.228.6.21🇹🇼 NCIC-TW220.228.0.0/19 New Century InfoComm Tech Co., Ltd.
SOAdns1.f1.com.twohgo@ms23.hinet.net 2000-11-01 #8

com.tw

DNSSEC⚠️ Not signed
NSa.twnic.net.tw ⭐ ⚠️ Not in parent delegation
NSanytld.apnic.net ⚠️ Not in parent delegation
NSb.twnic.net.tw ⚠️ Not in parent delegation
NSc.twnic.net.tw ⚠️ Not in parent delegation
NSd.twnic.net.tw ⚠️ Not in parent delegation
NSe.twnic.net.tw ⚠️ Not in parent delegation
NSf.twnic.net.tw ⚠️ Not in parent delegation
NSg.twnic.net.tw ⚠️ Not in parent delegation
NSh.dns.tw ⚠️ Not in parent delegation
NSh.twnic.net.tw ⚠️ Not in parent delegation
SOAa.twnic.net.twsnw@twnic.net.tw serial=2006356026
WOT: SAFE (58/100)

MX for

java.com.tw

Subdomains

www.java.com.tw

DNS History

8 records (5 active, 3 former)

20162017201820192020202120222023202420252026NSdns1.f1.com.twdns2.f1.com.twMXjava.com.twwww.java.com.twA220.228.6.21220.228.6.42220.228.6.5961.66.228.47
●NSdns1.f1.com.tw2015-08-26 → 2026-06-04 · 2 obs
● 2015-08-26 11:32:00
● 2026-06-04 16:30:10
●NSdns2.f1.com.tw2015-08-26 → 2026-06-04 · 2 obs
● 2015-08-26 11:32:00
● 2026-06-04 16:30:10
●MXjava.com.tw2015-08-26 → 2026-06-04 · 2 obs
● 2015-08-26 11:32:00
● 2026-06-04 16:30:10
●MXwww.java.com.tw2015-08-26 → 2026-06-04 · 2 obs
● 2015-08-26 11:32:00
● 2026-06-04 16:30:10
●A220.228.6.212026-04-18 → 2026-06-04 · 3 obs
○ 2026-04-13 02:17:02
● 2026-04-18 16:47:24
● 2026-06-04 16:30:10
○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
○ 2026-06-04 16:30:10
○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
○ 2026-06-04 16:30:10
○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
○ 2026-06-04 16:30:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
twg.dns.tw, anytld.apnic.net, e.dns.tw, a.dns.tw...16 records
java.com.twdns1.f1.com.tw, dns2.f1.com.tw2 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: 2348ms | Queries: -

📄 Records

TypeCountSample Data
A1220.228.6.21
NS2dns2.f1.com.tw, dns1.f1.com.tw
MX2www.java.com.tw (pri: 14), java.com.tw (pri: 10)
SOA1dns1.f1.com.tw ohgo.ms23.hinet.net

📌 Glue Records Collected

Total: 18

In-bailiwick: 14 (g.dns.tw, e.dns.tw, e.dns.tw...)

Out-of-bailiwick: 4 (anytld.apnic.net, anytld.apnic.net, dns2.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.

Additional host names — 7775m.com, 90691ut.com, www.7755e.com and two others — share IP numbers with java.com.tw.

Name Servers

Two name servers handle the delegation for java.com.tw: dns1.f1.com.tw and dns2.f1.com.tw.

java.com.tw shares its name server setup with other domains, including live176.com, capatina.com.tw, f-line.com.tw and two others.

java.com.tw partially shares its NS delegation with several other domains, including kiss225.com, av0204.com, ez300.com and two others.

These name servers are frequently used alongside name servers ns1.oknet.tw, ns2.oknet.tw, sp234.f1.com.tw and three others.

dns1.f1.com.tw resolves to 218.32.213.234. dns2.f1.com.tw resolves to 220.228.6.17. Both host names point to a single IP number.

Mail Servers

java.com.tw relies on two mail servers for delivery — java.com.tw and www.java.com.tw.

java.com.tw directs to 220.228.6.21, as does www.java.com.tw — both hostnames resolve to that one IP address.

java.com.tw along with www.java.com.tw each resolve to 220.228.6.21 IP addresses.