`cetc28.com.cn`

DNSSEC	⚠️ Not signed
A	221.226.176.178^{🇨🇳 CHINANET-BACKBONE221.224.0.0/13 ChinaNet Jiangsu Network}
NS	`ns1.sfn.cn` ⭐
		A	111.63.77.29^{🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route)}
NS	`ns2.sfn.cn`
		A	101.37.119.99^{🇨🇳 Alibaba-Cloud101.37.0.0/17}
		A	111.63.77.30^{🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route)}
MX	221.226.176.176 ⭐
SOA	`ns1.sfn.cn`root@ns1.sfn.cn 2026-05-01 #20

`com.cn`

	DNSSEC	⚠️ Not signed
	NS	`a.dns.cn` ⭐ ⚠️ Not in parent delegation
	NS	`b.dns.cn` ⚠️ Not in parent delegation
	NS	`c.dns.cn` ⚠️ Not in parent delegation
	NS	`cns.cernet.net` ⚠️ Not in parent delegation
	NS	`d.dns.cn` ⚠️ Not in parent delegation
	NS	`e.dns.cn` ⚠️ Not in parent delegation
	SOA	`a.dns.cn`root@cnnic.cn serial=2030559960

WOT: NOT_SAFE (20/100)

Same first word

cetc28.com.cn

cetc28.cn

DNS History

7 records (4 active, 3 former)

●NSns1.sfn.cn2015-11-07 → 2026-05-10 · 3 obs

○ 2015-06-06 18:40:08
● 2015-11-07 05:42:42
● 2026-05-10 13:04:02

●NSns2.sfn.cn2015-11-07 → 2026-05-10 · 3 obs

○ 2015-06-06 18:40:08
● 2015-11-07 05:42:42
● 2026-05-10 13:04:02

○NSns3.sanfront.com.cn2015-06-06 → 2015-06-06 · 3 obs

● 2015-06-06 18:40:08
○ 2015-11-07 05:42:42
○ 2026-05-10 13:04:02

○NSns5.sanfront.com.cn2015-06-06 → 2015-06-06 · 3 obs

● 2015-06-06 18:40:08
○ 2015-11-07 05:42:42
○ 2026-05-10 13:04:02

●MX221.226.176.1762015-06-06 → 2026-05-10 · 5 obs

● 2015-06-06 18:40:08
○ 2015-11-07 05:42:42
○ 2016-12-21 15:20:40
● 2026-03-30 15:52:42
● 2026-05-10 13:04:02

○MX221.226.176.1762015-11-07 → 2016-12-21 · 5 obs

○ 2015-06-06 18:40:08
● 2015-11-07 05:42:42
● 2016-12-21 15:20:40
○ 2026-03-30 15:52:42
○ 2026-05-10 13:04:02

●A221.226.176.1782015-06-06 → 2026-05-10 · 2 obs

● 2015-06-06 18:40:08
● 2026-05-10 13:04:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	c.dns.cn, a.dns.cn, b.dns.cn, d.dns.cn...	-
cetc28.com.cn	ns1.sfn.cn, ns2.sfn.cn	-

✅ Authoritative Response

Server:111.63.77.29

NS records: ns1.sfn.cn, ns2.sfn.cn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cetc28.com.cn (unsigned zone)

⏱️ Timing

Total: 1905ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`221.226.176.178`
NS	2	`ns1.sfn.cn, ns2.sfn.cn`
MX	1	`221.226.176.176 (pri: 10)`
SOA	1	`ns1.sfn.cn root.ns1.sfn.cn`

Analysis

IP Addresses

cetc28.com.cn points to a single IP number: 221.226.176.178.

Name Servers

cetc28.com.cn is delegated to two name servers: ns1.sfn.cn and ns2.sfn.cn.

cetc28.com.cn shares the same name server setup as other domains, for example zfcg.gov.cn, bzzf.gov.cn, cssweb.com.cn, istiy.yn.cn and sdfz.sh.cn.

cetc28.com.cn partially shares name servers with other domains, for instance qzlib.com.cn, sciencepress.cn and bozhou.cn.

Host names with two IP numbers: ns2.sfn.cn points to 101.37.119.99 and 111.63.77.30.

Host names with one IP number: ns1.sfn.cn points to 111.63.77.29.

Mail Servers

cetc28.com.cn is handled by a single mail server, 221.226.176.176.

cetc28.com.cn - robtex.com

cetc28.com.cn

com.cn