`postmaster.cn`

	CNAME	`show.17ex.com`
	DNSSEC	⚠️ Not signed
	A	8.210.157.232^{🇭🇰 Alibaba-Cloud8.210.128.0/17 Alibaba.com Singapore E-Commerce Private Limited 8 Shenton Way, 45-01 AXA Tower, Singapore 068811}

`cn`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.dns.cn` ⭐
	NS	`b.dns.cn`
	NS	`c.dns.cn`
	NS	`d.dns.cn`
	NS	`e.dns.cn`
	NS	`ns.cernet.net` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2035067031

Same first word

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DNS History

7 records (3 active, 4 former)

○NSdns11.hichina.com2026-02-17 → 2026-02-17 · 3 obs

○ 2017-01-16 02:40:06
● 2026-02-17 00:45:46
○ 2026-07-20 23:10:26

○NSdns12.hichina.com2026-02-17 → 2026-02-17 · 3 obs

○ 2017-01-16 02:40:06
● 2026-02-17 00:45:46
○ 2026-07-20 23:10:26

●NSns1.17ex.com2026-07-20 → 2026-07-20 · 2 obs

○ 2026-02-17 00:45:46
● 2026-07-20 23:10:26

○NSns1.22.cn2017-01-16 → 2017-01-16 · 3 obs

● 2017-01-16 02:40:06
○ 2026-02-17 00:45:46
○ 2026-07-20 23:10:26

●NSns2.17ex.com2026-07-20 → 2026-07-20 · 2 obs

○ 2026-02-17 00:45:46
● 2026-07-20 23:10:26

○CNAMEoverdue.aliyun.com2026-02-17 → 2026-06-13 · 5 obs

● 2026-02-17 00:45:46
● 2026-06-10 06:09:50
○ 2026-06-11 04:06:46
● 2026-06-13 13:21:54
○ 2026-07-20 23:10:26

●CNAMEshow.17ex.com2026-07-20 → 2026-07-20 · 2 obs

○ 2026-06-13 13:21:54
● 2026-07-20 23:10:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
postmaster.cn	ns1.17ex.com, ns2.17ex.com	-

✅ Authoritative Response

Server:218.98.111.191

NS records: ns1.17ex.com, ns2.17ex.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for postmaster.cn (unsigned zone)

⏱️ Timing

Total: 2328ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`ns1.17ex.com, ns2.17ex.com`
CNAME	1	`show.17ex.com`
SOA	1	`ns1.17ex.com admin.17ex.com`

Analysis

IP Addresses

postmaster.cn directs to one IP number, which is 8.210.157.232.

Among the host names that share IP numbers with postmaster.cn are 17domain.com, sales2.17ex.com, savon.cn and two others.

postmaster.cn - robtex.com

postmaster.cn

cn