`021edu.cn`

DNSSEC	⚠️ Not signed
A	47.116.120.168^{🇨🇳 Alibaba-Cloud47.116.0.0/17 Alibaba (US) Technology Co., Ltd.}
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	`mxbiz1.qq.com` ⭐
		A	203.205.147.218^{🇭🇰 TENCENT-NET-AP-CN203.205.147.0/24 Proxy-registered route object}
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
MX	`mxbiz2.qq.com`⁽¹⁰⁾
		A	203.205.232.191^{🇭🇰 TENCENT-NET-AP-CN203.205.232.0/23 Proxy-registered route object}
SOA	`ns1.sfn.cn`root@ns1.sfn.cn 2026-03-24 #12

`cn`

	DNSSEC	⚠️ Not signed
	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=2034546407

Same first word

021edu.cn

021edu.org

Similar names

ued021.com

edu120.com.cn

ued012.com

edu201.com

DNS History

7 records (5 active, 2 former)

●NSns1.sfn.cn2015-10-25 → 2026-03-24 · 3 obs

○ 2015-06-07 12:43:38
● 2015-10-25 02:02:26
● 2026-03-24 05:20:26

●NSns2.sfn.cn2015-10-25 → 2026-03-24 · 3 obs

○ 2015-06-07 12:43:38
● 2015-10-25 02:02:26
● 2026-03-24 05:20:26

○NSns3.sanfront.com.cn2015-06-07 → 2015-06-07 · 3 obs

● 2015-06-07 12:43:38
○ 2015-10-25 02:02:26
○ 2026-03-24 05:20:26

○NSns5.sanfront.com.cn2015-06-07 → 2015-06-07 · 3 obs

● 2015-06-07 12:43:38
○ 2015-10-25 02:02:26
○ 2026-03-24 05:20:26

●MXmxbiz1.qq.com2015-06-07 → 2026-03-24 · 2 obs

● 2015-06-07 12:43:38
● 2026-03-24 05:20:26

●MXmxbiz2.qq.com2015-06-07 → 2026-03-24 · 2 obs

● 2015-06-07 12:43:38
● 2026-03-24 05:20:26

●A47.116.120.1682026-03-02 → 2026-03-24 · 2 obs

● 2026-03-02 08:10:46
● 2026-03-24 05:20:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
021edu.cn	ns1.sfn.cn, ns2.sfn.cn	3 records

✅ Authoritative Response

Server:101.37.119.99

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 021edu.cn (unsigned zone)

⏱️ Timing

Total: 1255ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`47.116.120.168`
NS	2	`ns2.sfn.cn, ns1.sfn.cn`
MX	2	`mxbiz2.qq.com (pri: 10), mxbiz1.qq.com (pri: 5)`
SOA	1	`ns1.sfn.cn root.ns1.sfn.cn`

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (ns1.sfn.cn, ns2.sfn.cn, ns2.sfn.cn)

Analysis

IP Addresses

021edu.cn resolves to a single IP: 47.116.120.168.

Name Servers

021edu.cn has two name servers: ns1.sfn.cn and ns2.sfn.cn.

021edu.cn shares the same name server setup as other domains, for example 310.cn, jyfy.com.cn, cargosecuring.com, hxbakingpowder.com and sdx.com.cn.

021edu.cn shares name servers with other domains to some extent, for example sdmi.cn and sac-world.com.

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

021edu.cn is served by two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.

021edu.cn shares the mail server setup with other domains, for example agceg.com, ailin-galaxy.com, shuimianxing.com, cgfreight.cn and innosep.com.

021edu.cn shares some mail servers with other domains, at least partially, for instance hzxylt.com, vsenz.com and inpxs.com.

Host names with two IP numbers: mxbiz1.qq.com points to: 203.205.147.218 and 203.205.232.191.

Host names with one IP number: mxbiz2.qq.com points to: 203.205.232.191.

Host names that point to 203.205.232.191: mxbiz1.qq.com and mxbiz2.qq.com.

021edu.cn - robtex.com

021edu.cn

cn