`mail.cooltechhk.com`

DNSSEC

⚠️ Not signed

`cooltechhk.com`

	DNSSEC	⚠️ Not signed
	NS	`dns.bizcn.com` ⭐
	NS	`ns1.dns.com.cn`
	NS	`ns2.dns.com.cn`
	MX	`mxn.mxhichina.com` ⭐
	MX	`mxw.mxhichina.com`⁽¹⁰⁾
	TXT	`v=spf1 include:spf.mxhichina.com -all`
	SOA	`dns.bizcn.com`abuse@bizcn.com serial=34

PTR for

158.250.166.180.in-addr.arpa

Previously MX for

cooltechhk.com

Same first word

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DNS History

2 records (0 active, 2 former)

○A180.166.250.1582015-07-17 → 2016-02-26 · 4 obs

● 2015-07-17 08:47:08
● 2016-02-26 12:59:10
○ 2021-09-10 12:59:26
○ 2026-03-30 18:05:38

○CNAMEmail.mxhichina.com2021-09-10 → 2021-09-10 · 3 obs

● 2021-09-10 12:59:26
○ 2026-03-30 18:05:36
○ 2026-03-30 18:05:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
cooltechhk.com	ns1.dns.com.cn, ns2.dns.com.cn	-

✅ Authoritative Response

Server:61.172.183.70

NS records: ns1.dns.com.cn, ns2.dns.com.cn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cooltechhk.com (unsigned zone)

⏱️ Timing

Total: 2944ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`mail.mxhichina.com`

mail.cooltechhk.com - robtex.com