`learn520.com`

DNSSEC	⚠️ Not signed
A	197.255.142.71^{🇨🇻 CVTS1197.255.136.0/21 CVMultimedia3105202005}
NS	`dns9.hichina.com` ⭐
		A	2408:4009:501::17^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.42^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.52^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.202^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.212^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.42^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.52^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.112^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.122^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
NS	`dns10.hichina.com`
		A	2408:4009:501::18^{🇨🇳 Alibaba-Cloud2408:4009:501::/48}
		A	39.96.153.41^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	39.96.153.51^{🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC}
		A	47.118.199.201^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	47.118.199.211^{🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd.}
		A	120.76.107.41^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	120.76.107.51^{🇨🇳 Alibaba-Cloud120.76.0.0/17}
		A	139.224.142.111^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
		A	139.224.142.121^{🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District,}
SOA	`dns9.hichina.com`hostmaster@hichina.com 2026-01-12 #9

`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=1780762831

Subdomains

www.learn520.com

Same first word

learn520.com

DNS History

6 records (3 active, 3 former)

●NSdns10.hichina.com2015-07-19 → 2026-06-06 · 5 obs

● 2015-07-19 10:23:48
● 2017-03-16 02:37:52
○ 2020-02-09 13:43:02
● 2026-03-13 05:19:34
● 2026-06-06 16:50:38

●NSdns9.hichina.com2015-07-19 → 2026-06-06 · 5 obs

● 2015-07-19 10:23:48
● 2017-03-16 02:37:52
○ 2020-02-09 13:43:02
● 2026-03-13 05:19:34
● 2026-06-06 16:50:38

○NSns5.dnsdun.com2020-02-09 → 2020-02-09 · 4 obs

○ 2017-03-16 02:37:52
● 2020-02-09 13:43:02
○ 2026-03-13 05:19:34
○ 2026-06-06 16:50:38

○NSns5.dnsdun.net2020-02-09 → 2020-02-09 · 4 obs

○ 2017-03-16 02:37:52
● 2020-02-09 13:43:02
○ 2026-03-13 05:19:34
○ 2026-06-06 16:50:38

○A154.216.67.572020-02-09 → 2020-02-09 · 3 obs

● 2020-02-09 13:43:02
○ 2026-03-13 05:19:34
○ 2026-06-06 16:50:38

●A197.255.142.712026-03-13 → 2026-06-06 · 3 obs

○ 2020-02-09 13:43:02
● 2026-03-13 05:19:34
● 2026-06-06 16:50:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	d.gtld-servers.net, i.gtld-servers.net, g.gtld-servers.net, c.gtld-servers.net...	-
learn520.com	dns9.hichina.com, dns10.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.41

NS records: dns9.hichina.com, dns10.hichina.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for learn520.com (unsigned zone)

⏱️ Timing

Total: 3639ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`197.255.142.71`
NS	2	`dns10.hichina.com, dns9.hichina.com`
SOA	1	`dns9.hichina.com hostmaster.hichina.com`

📌 Glue Records Collected

Total: 18

Out-of-bailiwick: 18 (dns9.hichina.com, dns9.hichina.com, dns9.hichina.com...)

Analysis

Hierarchy

www.learn520.com is delegated beneath learn520.com.

IP Addresses

learn520.com has exactly one IP address — 197.255.142.71.

Further host names like www.learn520.com and pfscv.com overlap in IP numbers with learn520.com.

Name Servers

learn520.com uses two name servers for its delegation: dns10.hichina.com and dns9.hichina.com.

The name server configuration of learn520.com is shared with other domains, for instance mbszn.net, gyzcgl.com, lgemonitor.com.cn and two others.

There is at least partial name server overlap between learn520.com and other domains — easyflower.com, actanet.org, nhkseal.com and two more among them.

These name servers tend to appear in combination with the name servers ns1.alidns.com, ns2.alidns.com, expirens3.hichina.com and expirens4.hichina.com.

Hosts with 9 IP addresses each:

dns10.hichina.com has IP addresses 39.96.153.41, 39.96.153.51, 47.118.199.201 and six others.

dns9.hichina.com has IP addresses 39.96.153.42, 39.96.153.52, 47.118.199.202 and six others.

learn520.com - robtex.com

learn520.com

com