`ts21cn.com`

DNSSEC	⚠️ Not signed
A	154.193.223.162^{🇰🇷 AS400619154.193.220.0/22}
NS	`a9.share-dns.com` ⭐ ⚠️ Not in parent delegation
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`a.share-dns.com` ⚠️ Not in zone NS records
		A	172.64.53.25^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b.share-dns.net` ⚠️ Not in zone NS records
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`b9.share-dns.net` ⚠️ Not in parent delegation
		A	172.64.52.239^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
SOA	`a.share-dns.com`master@share-dns.com serial=1751360040

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1774591477

Subdomains

mail.ts21cn.com

Same first word

ts21cn.com

Similar names

21stnc.com

21stnc.us

21stcn.com

DNS History

12 records (5 active, 7 former)

●NSa.share-dns.com2026-03-27 → 2026-03-27 · 2 obs

○ 2020-01-23 10:17:46
● 2026-03-27 06:17:44

●NSa9.share-dns.com2026-03-27 → 2026-03-27 · 2 obs

○ 2020-01-23 10:17:46
● 2026-03-27 06:17:44

●NSb.share-dns.net2026-03-27 → 2026-03-27 · 2 obs

○ 2020-01-23 10:17:46
● 2026-03-27 06:17:44

●NSb9.share-dns.net2026-03-27 → 2026-03-27 · 2 obs

○ 2020-01-23 10:17:46
● 2026-03-27 06:17:44

○NSf1g1ns1.dnspod.net2016-06-19 → 2020-01-23 · 4 obs

○ 2016-01-29 03:13:56
● 2016-06-19 13:15:22
● 2020-01-23 10:17:46
○ 2026-03-27 06:17:44

○NSf1g1ns2.dnspod.net2016-06-19 → 2020-01-23 · 4 obs

○ 2016-01-29 03:13:56
● 2016-06-19 13:15:22
● 2020-01-23 10:17:46
○ 2026-03-27 06:17:44

○NSns1.51dns.com2015-06-14 → 2015-11-07 · 4 obs

● 2015-06-14 03:34:18
● 2015-11-07 04:48:54
○ 2016-01-29 03:13:56
○ 2026-03-27 06:17:44

○NSns2.51dns.com2015-06-14 → 2015-11-07 · 4 obs

● 2015-06-14 03:34:18
● 2015-11-07 04:48:54
○ 2016-01-29 03:13:56
○ 2026-03-27 06:17:44

○A104.151.209.1962015-11-07 → 2015-11-07 · 3 obs

● 2015-11-07 04:48:54
○ 2016-01-29 03:13:56
○ 2026-03-27 06:17:44

○A107.151.98.752020-01-23 → 2020-01-23 · 3 obs

○ 2016-06-19 13:15:22
● 2020-01-23 10:17:46
○ 2026-03-27 06:17:44

●A154.193.223.1622026-03-27 → 2026-03-27 · 2 obs

○ 2020-01-23 10:17:46
● 2026-03-27 06:17:44

○A198.2.234.102016-06-19 → 2016-06-19 · 4 obs

○ 2016-01-29 03:13:56
● 2016-06-19 13:15:22
○ 2020-01-23 10:17:46
○ 2026-03-27 06:17:44

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, a.gtld-servers.net, e.gtld-servers.net, c.gtld-servers.net...	-
ts21cn.com	b9.share-dns.net, a9.share-dns.com	1 record

✅ Authoritative Response

Server:172.64.53.25

NS records: b9.share-dns.net, a9.share-dns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for ts21cn.com (unsigned zone)

⏱️ Timing

Total: 163ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`154.193.223.162`
NS	2	`a.share-dns.com, b.share-dns.net`
SOA	1	`a.share-dns.com master.share-dns.com`

📌 Glue Records Collected

Total: 1

Out-of-bailiwick: 1 (a9.share-dns.com)

Analysis

Hierarchy

ts21cn.com is the parent of mail.ts21cn.com.

IP Addresses

ts21cn.com points to IP number 154.193.223.162.

Other host names, for example mail.51gstx.com and mail.ts21cn.com, share IPs with ts21cn.com.

Name Servers

ts21cn.com is delegated to four name servers: a9.share-dns.com, a.share-dns.com, b9.share-dns.net and b.share-dns.net.

ts21cn.com shares name servers with other domains at least partially, for example ycdata.cc, xbqygl.com, hywyzs.com, tjyichaozs.com and zlssg.com.