`mail.coretec.com.tw`

DNSSEC	⚠️ Not signed
A	211.72.69.156^{🇹🇼 HiNet211.72.0.0/16 (HiNet) Chunghwa Telecom Co., Ltd.}
		PTR	`211-72-69-156.hinet-ip.hinet.net`

`coretec.com.tw`

	DNSSEC	⚠️ Not signed
	A	125.227.75.5^{🇹🇼 HiNet125.227.0.0/16 descr: (HiNet) Chunghwa Telecom Co., Ltd.}
	NS	`admns1.hinet.net` ⭐
	NS	`admns2.hinet.net`
	MX	`coretec-com-tw.mail.protection.outlook.com` ⭐
	TXT	`v=spf1 include:spf.protection.outlook.com -all`
	TXT	`MS=ms84029526`
	SOA	`admns1.hinet.net`hostmaster@hinet.net serial=1778353201

Previously MX for

coretec.com.tw

Same first word

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DNS History

1 record (1 active, 0 former)

●A211.72.69.1562015-09-02 → 2026-05-11 · 2 obs

● 2015-09-02 14:59:12
● 2026-05-11 01:42:40

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com.tw	b.twnic.net.tw, f.twnic.net.tw, d.twnic.net.tw, e.twnic.net.tw...	-
coretec.com.tw	admns2.hinet.net, admns1.hinet.net	-

✅ Authoritative Response

Server:203.74.116.192

NS records: admns2.hinet.net, admns1.hinet.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for com.tw (unsigned zone)

⏱️ Timing

Total: 1367ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`211.72.69.156`

Analysis

IP Addresses

mail.coretec.com.tw points to a single IP number: 211.72.69.156.

Other host names, for instance 211-72-69-156.hinet-ip.hinet.net, share IP numbers with mail.coretec.com.tw.

mail.coretec.com.tw - robtex.com