`chinesefreecourses.com`

DNSSEC	⚠️ Not signed
A	35.220.158.188^{🇭🇰 Google35.220.144.0/20}
		PTR	`188.158.220.35.bc.googleusercontent.com`
NS	`n1.xundns.com` ⭐ ⚠️ Not in parent delegation
		A	2409:8c44:1b00:601:1:1110:609:6027^{🇨🇳 CHINAMOBILE-CN2409:8c44:1b00::/48 CMI (Customer Route)}
		A	2604:86c0:5001:11::2659:466b^{🇺🇸 AS630232604:86c0:5000::/36 GTHOST-SEA}
		A	38.89.70.107^{🇺🇸 AS6302338.89.70.0/24 Route Registered for Cogent Communications Customer - GlobalTelehost Corp}
			PTR	`107-70-89-38.clients.gthost.com`
		A	111.6.96.27^{🇨🇳 CHINAMOBILE-CN111.6.96.0/21 CMI (Customer Route)}
NS	`n2.xundns.com` ⚠️ Not in parent delegation
		A	2408:8621:0:42:e401:402:0:a^{🇨🇳 CHINA169-Backbone2408:8621::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2408:8722:1801:10:4:611:6303:181^{🇨🇳 CHINA169-Backbone2408:8722::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2604:86c0:6001:8::a9c5:8e51^{🇺🇸 AS630232604:86c0:6000::/36 GTHOST-SCL}
		A	61.163.30.181^{🇨🇳 CHINA169-Backbone61.163.0.0/16 CNC Group CHINA169 Henan Province Network}
			PTR	`hn.ly.kd.adsl`
		A	122.114.37.19^{🇨🇳 CHINA169-Backbone122.114.0.0/16 route of Chinaunicomroute of Chinaunicom}
		A	169.197.142.81^{🇺🇸 AS63023169.197.142.0/24 GlobalTeleHost}
			PTR	`81-142-197-169.clients.gthost.com`
NS	`v1s1.xundns.com` ⚠️ Not in zone NS records
		A	2409:8c44:1b00:601:1:1110:609:6027^{🇨🇳 CHINAMOBILE-CN2409:8c44:1b00::/48 CMI (Customer Route)}
		A	2604:86c0:5001:11::2659:466b^{🇺🇸 AS630232604:86c0:5000::/36 GTHOST-SEA}
		A	38.89.70.107^{🇺🇸 AS6302338.89.70.0/24 Route Registered for Cogent Communications Customer - GlobalTelehost Corp}
			PTR	`107-70-89-38.clients.gthost.com`
		A	111.6.96.27^{🇨🇳 CHINAMOBILE-CN111.6.96.0/21 CMI (Customer Route)}
NS	`v1s2.xundns.com` ⚠️ Not in zone NS records
		A	2408:8621:0:42:e401:402:0:a^{🇨🇳 CHINA169-Backbone2408:8621::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2408:8722:1801:10:4:611:6303:181^{🇨🇳 CHINA169-Backbone2408:8722::/32 China Unicom B811&A1218, China Unicom No.21, Jin-Rong Street}
		A	2604:86c0:6001:8::a9c5:8e51^{🇺🇸 AS630232604:86c0:6000::/36 GTHOST-SCL}
		A	61.163.30.181^{🇨🇳 CHINA169-Backbone61.163.0.0/16 CNC Group CHINA169 Henan Province Network}
			PTR	`hn.ly.kd.adsl`
		A	122.114.37.19^{🇨🇳 CHINA169-Backbone122.114.0.0/16 route of Chinaunicomroute of Chinaunicom}
		A	169.197.142.81^{🇺🇸 AS63023169.197.142.0/24 GlobalTeleHost}
			PTR	`81-142-197-169.clients.gthost.com`
SOA	`n1.xundns.com`nsadmin@xundns.com serial=437896

`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=1774520582

Previously MX for

chinesefreecourses.com

Subdomains

mail.chinesefreecourses.com

Same first word

chinesefreecourses.com

DNS History

13 records (5 active, 8 former)

○NSdns1.interdominios.com2015-10-15 → 2016-07-17 · 5 obs

○ 2015-05-21 22:02:36
● 2015-10-15 13:27:18
● 2016-07-17 15:41:56
○ 2026-03-02 07:32:54
○ 2026-03-26 10:39:28

○NSdns2.interdominios.com2015-10-15 → 2016-07-17 · 5 obs

○ 2015-05-21 22:02:36
● 2015-10-15 13:27:18
● 2016-07-17 15:41:56
○ 2026-03-02 07:32:54
○ 2026-03-26 10:39:28

●NSn1.xundns.com2026-03-02 → 2026-03-26 · 3 obs

○ 2016-07-17 15:41:56
● 2026-03-02 07:32:54
● 2026-03-26 10:39:28

●NSn2.xundns.com2026-03-02 → 2026-03-26 · 3 obs

○ 2016-07-17 15:41:56
● 2026-03-02 07:32:54
● 2026-03-26 10:39:28

○NSns1.rimuhosting.com2015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 22:02:36
○ 2015-10-15 13:27:18
○ 2026-03-26 10:39:28

○NSns2.rimuhosting.com2015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 22:02:36
○ 2015-10-15 13:27:18
○ 2026-03-26 10:39:28

●NSv1s1.xundns.com2026-03-02 → 2026-03-26 · 3 obs

○ 2016-07-17 15:41:56
● 2026-03-02 07:32:54
● 2026-03-26 10:39:28

●NSv1s2.xundns.com2026-03-02 → 2026-03-26 · 3 obs

○ 2016-07-17 15:41:56
● 2026-03-02 07:32:54
● 2026-03-26 10:39:28

○MXchinesefreecourses.com2015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 22:02:36
○ 2015-10-15 13:27:18
○ 2026-03-26 10:39:28

○MXmail.chinesefreecourses.com2015-10-15 → 2016-07-17 · 5 obs

○ 2015-05-21 22:02:36
● 2015-10-15 13:27:18
● 2016-07-17 15:41:56
○ 2026-03-02 07:32:54
○ 2026-03-26 10:39:28

○A109.74.197.1142015-10-15 → 2016-07-17 · 5 obs

○ 2015-05-21 22:02:36
● 2015-10-15 13:27:18
● 2016-07-17 15:41:56
○ 2026-03-02 07:32:54
○ 2026-03-26 10:39:28

●A35.220.158.1882026-03-02 → 2026-03-26 · 3 obs

○ 2016-07-17 15:41:56
● 2026-03-02 07:32:54
● 2026-03-26 10:39:28

○A94.76.200.392015-05-21 → 2015-05-21 · 3 obs

● 2015-05-21 22:02:36
○ 2015-10-15 13:27:18
○ 2026-03-26 10:39:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	m.gtld-servers.net, e.gtld-servers.net, l.gtld-servers.net, k.gtld-servers.net...	-
chinesefreecourses.com	v1s1.xundns.com, v1s2.xundns.com	11 records

✅ Authoritative Response

Server:111.6.96.27

NS records: v1s1.xundns.com, v1s2.xundns.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for chinesefreecourses.com (unsigned zone)

⏱️ Timing

Total: 751ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`35.220.158.188`
NS	2	`n1.xundns.com, n2.xundns.com`
SOA	1	`n1.xundns.com nsadmin.xundns.com`

📌 Glue Records Collected

Total: 11

Out-of-bailiwick: 11 (v1s1.xundns.com, v1s1.xundns.com, v1s1.xundns.com...)

Analysis

Hierarchy

chinesefreecourses.com is the parent of mail.chinesefreecourses.com.

IP Addresses

chinesefreecourses.com points to a single IP number: 35.220.158.188.

other host names for instance www.battlestarlaser.com, pureworx.net, battlestarlaser.com, 188.158.220.35.bc.googleusercontent.com and pianofusion.com share IP numbers with chinesefreecourses.com.

Name Servers

chinesefreecourses.com is delegated to four name servers: n1.xundns.com, n2.xundns.com, v1s1.xundns.com and v1s2.xundns.com.

chinesefreecourses.com at least partially shares name servers with other domains, for instance weihengtongdiao.com, sywtxt.com, hantui.org.cn, ms014.com and pengyuanwoven.com.