`21idea.cn`

DNSSEC	⚠️ Not signed
A	208.98.43.80^{🇺🇸 SHARKTECH-1208.98.43.0/24}
		PTR	`mta14.jensenstilbud.com`
NS	`www.21idea.cn` ⭐
		A	208.98.40.207^{🇺🇸 SHARKTECH-1208.98.40.0/24}
NS	`ns1.4.cn` ⚠️ Not in zone NS records
		A	107.167.27.66^{🇺🇸 SHARKTECH-1107.167.27.0/24 CMI (Customer Route)}
NS	`ns2.4.cn` ⚠️ Not in zone NS records
SOA	`www.21idea.cn`21idea@cn 2008-08-03 #0

`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=2034662252

Subdomains

www.21idea.cn

Same first word

21idea.cn

Similar names

idea21.eu

DNS History

11 records (4 active, 7 former)

●NSns1.4.cn2026-03-23 → 2026-04-12 · 3 obs

○ 2018-12-13 04:28:54
● 2026-03-23 23:16:08
● 2026-04-12 11:21:02

○NSns1.ndns.cn2015-06-04 → 2018-12-13 · 4 obs

● 2015-06-04 09:45:56
● 2018-12-13 04:28:54
○ 2026-03-23 23:16:08
○ 2026-04-12 11:21:02

●NSns2.4.cn2026-03-23 → 2026-04-12 · 3 obs

○ 2018-12-13 04:28:54
● 2026-03-23 23:16:08
● 2026-04-12 11:21:02

○NSns2.ndns.cn2015-06-04 → 2018-12-13 · 4 obs

● 2015-06-04 09:45:56
● 2018-12-13 04:28:54
○ 2026-03-23 23:16:08
○ 2026-04-12 11:21:02

●NSwww.21idea.cn2026-03-23 → 2026-04-12 · 6 obs

○ 2018-12-13 04:28:54
● 2026-03-23 23:16:08
● 2026-03-26 20:35:40
○ 2026-03-27 17:12:34
● 2026-03-28 18:49:22
● 2026-04-12 11:21:02

○A202.91.227.1722015-06-04 → 2016-01-23 · 4 obs

● 2015-06-04 09:45:56
● 2016-01-23 03:22:22
○ 2017-01-10 17:43:56
○ 2026-04-12 11:21:02

○A202.91.242.282017-01-10 → 2018-12-13 · 5 obs

○ 2016-01-23 03:22:22
● 2017-01-10 17:43:56
● 2018-12-13 04:28:54
○ 2026-03-23 23:16:08
○ 2026-04-12 11:21:02

○A208.98.40.772026-03-23 → 2026-03-23 · 4 obs

○ 2018-12-13 04:28:54
● 2026-03-23 23:16:08
○ 2026-03-26 20:35:40
○ 2026-04-12 11:21:02

○A208.98.43.142026-03-28 → 2026-03-28 · 4 obs

○ 2026-03-27 17:12:34
● 2026-03-28 18:49:22
○ 2026-04-07 15:38:36
○ 2026-04-12 11:21:02

○A208.98.43.742026-04-07 → 2026-04-07 · 4 obs

○ 2026-03-28 18:49:22
● 2026-04-07 15:38:36
○ 2026-04-12 11:21:00
○ 2026-04-12 11:21:02

●A208.98.43.802026-03-26 → 2026-04-12 · 6 obs

○ 2026-03-23 23:16:08
● 2026-03-26 20:35:40
○ 2026-03-27 17:12:34
○ 2026-04-07 15:38:36
● 2026-04-12 11:21:00
● 2026-04-12 11:21:02

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn...	-
21idea.cn	ns1.4.cn, ns2.4.cn	-

✅ Authoritative Response

Server:107.167.27.66

NS records: ns1.4.cn, ns2.4.cn

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21idea.cn (unsigned zone)

⏱️ Timing

Total: 3354ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`208.98.43.80`
SOA	1	`www.21idea.cn 21idea.cn`

Analysis

Hierarchy

The parent of www.21idea.cn is 21idea.cn.

IP Addresses

21idea.cn points to an IP address: 208.98.43.80.

other host names include www.www.www.1090.cc, hbqnxy.com, www.05r.com, www.sagem.net and www.www.www.gsygsearch-aol-www.shishicaiwang.com; they share IP numbers with 21idea.cn.

Name Servers

21idea.cn is delegated to three name servers www.21idea.cn, ns1.4.cn and ns2.4.cn.

21idea.cn at least partially shares name servers with other domains, for instance china51.com, lezhuanwang.com, yc3e.com, shikonglieren.com and zgbxb.com.cn.

These name servers are commonly used alongside www.lezhuanwang.com.

Host names with one IP:

www.21idea.cn points to: 208.98.40.207

ns1.4.cn points to: 107.167.27.66

21idea.cn - robtex.com

21idea.cn

cn