`mail.sciencecom.cn`

	DNSSEC	⚠️ Not signed
	A	124.133.35.228^{🇨🇳 CHINA169-Backbone124.128.0.0/13 CNC Group CHINA169 Shandong Province Network}

`sciencecom.cn`

	DNSSEC	⚠️ Not signed
	A	124.133.230.252^{🇨🇳 CHINA169-Backbone124.128.0.0/13 CNC Group CHINA169 Shandong Province Network}
	NS	`dns21.hichina.com` ⭐
	NS	`dns22.hichina.com`
	MX	`mail.sciencecom.cn` ⭐
	SOA	`dns21.hichina.com`hostmaster@hichina.com 2026-01-12 #9

MX for

sciencecom.cn

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DNS History

1 record (1 active, 0 former)

●A124.133.35.2282026-02-22 → 2026-04-14 · 2 obs

● 2026-02-22 07:25:56
● 2026-04-14 16:08:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
sciencecom.cn	dns21.hichina.com, dns22.hichina.com	-

✅ Authoritative Response

Server:139.224.142.110

NS records: dns21.hichina.com, dns22.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sciencecom.cn (unsigned zone)

⏱️ Timing

Total: 5004ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`124.133.35.228`

Analysis

Mail Server Role

mail.sciencecom.cn handles mail for sciencecom.cn.

IP Addresses

mail.sciencecom.cn points to a single IP address: 124.133.35.228.

Other host names such as mail.sdscicom.com, mail.sdas.org, sdas.org, mail.sdioi.com and mail.keylab.net share IPs with mail.sciencecom.cn.

mail.sciencecom.cn - robtex.com