leetcode.cn - dns.ninja

`leetcode.cn`

	CNAME	`1zi859in9rs1950w.aliyunddos1010.com`
	DNSSEC	⚠️ Not signed
	A	203.107.63.81^{🇨🇳 Alibaba-Cloud203.107.63.0/24 Alibaba (US) Technology Co., Ltd.}

`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 2035-11-09 #90

rank #21768 globally
rank #698 in the tld
📈 Tranco rank: #40,213

Subdomains

pic.leetcode.cn

analysis.leetcode.cn

assets.leetcode.cn

static.leetcode.cn

logs.leetcode.cn

Same first word

leetcode.pro

leetcode.com

leetcode.wang

leetcode.codes

leetcode.co

leetcode.jp

leetcode.cn

leetcode.in

leetcode.ca

leetcode.io

leetcode.net

leetcode.uz

Similar names

DNS History

11 records (6 active, 5 former)

○NSdns17.hichina.com2015-06-07 → 2018-08-10 · 4 obs

● 2015-06-07 02:10:06
● 2018-08-10 08:39:50
○ 2026-02-23 07:50:52
○ 2026-07-30 12:16:56

○NSdns18.hichina.com2015-06-07 → 2018-08-10 · 4 obs

● 2015-06-07 02:10:06
● 2018-08-10 08:39:50
○ 2026-02-23 07:50:52
○ 2026-07-30 12:16:56

●NSvip3.alidns.com2026-02-23 → 2026-07-30 · 3 obs

○ 2018-08-10 08:39:50
● 2026-02-23 07:50:52
● 2026-07-30 12:16:56

●NSvip4.alidns.com2026-02-23 → 2026-07-30 · 3 obs

○ 2018-08-10 08:39:50
● 2026-02-23 07:50:52
● 2026-07-30 12:16:56

●MXmx1.feishu.cn2026-02-23 → 2026-07-30 · 3 obs

○ 2018-08-10 08:39:50
● 2026-02-23 07:50:52
● 2026-07-30 12:16:56

●MXmx2.feishu.cn2026-02-23 → 2026-07-30 · 3 obs

○ 2018-08-10 08:39:50
● 2026-02-23 07:50:52
● 2026-07-30 12:16:56

●MXmx3.feishu.cn2026-02-23 → 2026-07-30 · 3 obs

○ 2018-08-10 08:39:50
● 2026-02-23 07:50:52
● 2026-07-30 12:16:56

○MXmxbiz1.qq.com2017-01-05 → 2018-08-10 · 4 obs

● 2017-01-05 16:38:46
● 2018-08-10 08:39:50
○ 2026-02-23 07:50:52
○ 2026-07-30 12:16:56

○MXmxbiz2.qq.com2017-01-05 → 2018-08-10 · 4 obs

● 2017-01-05 16:38:46
● 2018-08-10 08:39:50
○ 2026-02-23 07:50:52
○ 2026-07-30 12:16:56

●CNAME1zi859in9rs1950w.aliyunddos1010.com2026-02-23 → 2026-07-30 · 5 obs

● 2026-02-23 07:50:52
● 2026-04-25 19:06:12
○ 2026-05-25 23:35:38
● 2026-06-12 01:00:58
● 2026-07-30 12:16:56

○CNAMEleetcode.cn.cdn.cloudflare.net2026-05-25 → 2026-05-25 · 4 obs

○ 2026-04-25 19:06:12
● 2026-05-25 23:35:38
○ 2026-06-12 01:00:58
○ 2026-07-30 12:16:56

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
cn	e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn...	-
leetcode.cn	vip3.alidns.com, vip4.alidns.com	-

✅ Authoritative Response

Server:170.33.80.10

NS records: vip3.alidns.com, vip4.alidns.com

🔒 DNSSEC Status

❌ Bogus (DNSSEC validation failed)

Validation error at cn: Error: DNS query timeout: 203.119.29.1 for DNSKEY cn

⏱️ Timing

Total: 3940ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	2	`vip4.alidns.com, vip3.alidns.com`
MX	3	`mx2.feishu.cn (pri: 20), mx3.feishu.cn (pri: 30)...`
TXT	6	`v=spf1 +include:_netblocks.m.feishu.cn ~, MS=ms72492506...`
CNAME	1	`1zi859in9rs1950w.aliyunddos1010.com`
SOA	1	`vip3.alidns.com hostmaster.hichina.com`

Analysis

Hierarchy

pic.leetcode.cn, analysis.leetcode.cn, assets.leetcode.cn, static.leetcode.cn and logs.leetcode.cn each fall under the parent domain leetcode.cn.

IP Addresses

leetcode.cn directs to one IP number, which is 203.107.63.81.

a6g9qa4rekkw8mhf.aliyunddos1010.com, 1z338f5w5h878r99.aliyunddos1010.com and 1zi859in9rs1950w.aliyunddos1010.com are examples of other host names that share IP numbers with leetcode.cn.