leetcode-cn.com - dns.ninja

`leetcode-cn.com`

DNSSEC	⚠️ Not signed
A	121.40.167.167^{🇨🇳 Alibaba-Cloud121.40.0.0/15}
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,}
MX	`m1.feishu.cn` ⭐
TXT	`v=spf1 +include:_netblocks.m.feishu.cn ~all`
TXT	`verification-code-site-App_feishu=niQTcedvrUovjp4x2BAb`
TXT	`google-site-verification=qvN3452ANGi2awvmmSeRl169RE6zUecK6DNjTFOt9no`
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=1783719142

rank #63192 globally
rank #30467 in the tld
📈 Tranco rank: #207,116

Subdomains

assets.leetcode-cn.com

video.leetcode-cn.com

www.leetcode-cn.com

pic.leetcode-cn.com

static.leetcode-cn.com

Same first word

leetcode-cn.com

DNS History

7 records (4 active, 3 former)

●NSdns10.hichina.com2017-11-12 → 2026-07-10 · 2 obs

● 2017-11-12 08:50:00
● 2026-07-10 21:46:36

●NSdns9.hichina.com2017-11-12 → 2026-07-10 · 2 obs

● 2017-11-12 08:50:00
● 2026-07-10 21:46:36

●MXm1.feishu.cn2026-02-20 → 2026-07-10 · 3 obs

○ 2017-11-12 08:50:00
● 2026-02-20 04:24:20
● 2026-07-10 21:46:36

○MXmxn.mxhichina.com2017-11-12 → 2017-11-12 · 3 obs

● 2017-11-12 08:50:00
○ 2026-02-20 04:24:20
○ 2026-07-10 21:46:36

○MXmxw.mxhichina.com2017-11-12 → 2017-11-12 · 3 obs

● 2017-11-12 08:50:00
○ 2026-02-20 04:24:20
○ 2026-07-10 21:46:36

●A121.40.167.1672026-02-20 → 2026-07-10 · 3 obs

○ 2017-11-12 08:50:00
● 2026-02-20 04:24:20
● 2026-07-10 21:46:36

○A47.96.28.332017-11-12 → 2017-11-12 · 3 obs

● 2017-11-12 08:50:00
○ 2026-02-20 04:24:20
○ 2026-07-10 21:46:36

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, e.gtld-servers.net, d.gtld-servers.net, m.gtld-servers.net...	-
leetcode-cn.com	dns9.hichina.com, dns10.hichina.com	18 records

✅ Authoritative Response

Server:120.76.107.42

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for leetcode-cn.com (unsigned zone)

⏱️ Timing

Total: 624ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`121.40.167.167`
NS	2	`dns10.hichina.com, dns9.hichina.com`
MX	1	`m1.feishu.cn (pri: 10)`
TXT	3	`google-site-verification=qvN3452ANGi2awv, v=spf1 +include:_netblocks.m.feishu.cn ...`
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

assets.leetcode-cn.com, video.leetcode-cn.com, www.leetcode-cn.com, pic.leetcode-cn.com and static.leetcode-cn.com are all subdomains of leetcode-cn.com.

IP Addresses

leetcode-cn.com directs to one IP number, which is 121.40.167.167.

Name Servers

DNS delegation for leetcode-cn.com points to two name servers: dns10.hichina.com and dns9.hichina.com.

leetcode-cn.com has the same name server delegation as a number of other domains, such as jindengqipei.com, dokken.cn, ebook.net.cn and two more.

Host names resolving to 9 IP numbers:

dns10.hichina.com has IP addresses 39.96.153.41, 39.96.153.51 and 47.118.199.201, plus 6 other.

dns9.hichina.com has IP addresses 39.96.153.42, 39.96.153.52 and 47.118.199.202, plus 6 other.

Mail Servers

leetcode-cn.com routes its mail through a single mail server, m1.feishu.cn.

leetcode-cn.com has the same mail server arrangement as a number of other domains, for example emotionhelper.com, cydao.com, yuzeli.net and two more.

leetcode-cn.com partially shares its mail servers with other domains — including ilxzy.cn, weeny.work, careerinsights.net and xueqiulearning.com.