21lu.cn - robtex.com
21lu.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 47.238.229.47🇭🇰 Alibaba-Cloud47.238.0.0/16 Proxy-registered route object | ||||||
| NS | ns1.julydns.com ⭐ ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns1.onclouddns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.julydns.com ⚠️ Not in parent delegation | ||||||
| A | 162.159.48.223Cloudflare162.159.48.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | ns2.onclouddns.com ⚠️ Not in zone NS records | ||||||
| A | 162.159.27.251Cloudflare162.159.27.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| SOA | ns1.julydns.commaster@jmdns.com serial=1782196149 | ||||||
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.cnroot@cnnic.cn serial=2035129133 | ||||||
Same first word
21lu.cn |
Similar names
DNS History
10 records (5 active, 5 former)
○NSf1g1ns1.dnspod.net2015-05-18 → 2016-12-03 · 4 obs
● 2016-12-03 15:25:58
○ 2026-06-29 21:28:52
○ 2026-08-03 18:54:06
○NSf1g1ns2.dnspod.net2015-05-18 → 2016-03-07 · 4 obs
● 2016-03-07 00:50:46
○ 2026-06-29 21:28:52
○ 2026-08-03 18:54:06
●NSns1.julydns.com2026-06-29 → 2026-08-03 · 3 obs
● 2026-06-29 21:28:52
● 2026-08-03 18:54:06
●NSns1.onclouddns.com2026-06-29 → 2026-08-03 · 3 obs
● 2026-06-29 21:28:52
● 2026-08-03 18:54:06
●NSns2.julydns.com2026-06-29 → 2026-08-03 · 3 obs
● 2026-06-29 21:28:52
● 2026-08-03 18:54:06
●NSns2.onclouddns.com2026-06-29 → 2026-08-03 · 3 obs
● 2026-06-29 21:28:52
● 2026-08-03 18:54:06
○A116.255.237.2222015-05-18 → 2016-03-07 · 6 obs
● 2015-10-10 18:23:14
○ 2015-12-12 00:27:00
● 2016-03-07 00:50:46
○ 2017-09-24 20:38:46
○ 2026-08-03 18:54:06
○A118.123.116.1572015-12-12 → 2015-12-12 · 4 obs
● 2015-12-12 00:27:00
○ 2016-03-07 00:50:46
○ 2026-08-03 18:54:06
●A47.238.229.472026-06-29 → 2026-08-03 · 3 obs
● 2026-06-29 21:28:52
● 2026-08-03 18:54:06
○CNAMEagent-site.sudusite.com2015-05-18 → 2017-09-24 · 6 obs
● 2016-03-07 00:50:46
○ 2016-12-03 15:25:58
● 2017-09-24 20:38:46
○ 2026-06-29 21:28:52
○ 2026-08-03 18:54:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, a.dns.cn, c.dns.cn, ns.cernet.net... | 11 records |
| 21lu.cn | ns1.onclouddns.com, ns2.onclouddns.com | - |
✅ Authoritative Response
Server:162.159.27.251
NS records: ns1.onclouddns.com, ns2.onclouddns.com
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at cn: Error: DNS query timeout: 203.119.29.1 for DNSKEY cn
⏱️ Timing
Total: 3386ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 47.238.229.47 |
| NS | 2 | ns1.julydns.com, ns2.julydns.com |
| SOA | 1 | ns1.julydns.com master.jmdns.com |
📌 Glue Records Collected
Total: 11
In-bailiwick: 10 (e.dns.cn, e.dns.cn, a.dns.cn...)
Out-of-bailiwick: 1 (ns.cernet.net)
Analysis
IP Addresses
21lu.cn directs to one IP number, which is 47.238.229.47.
Name Servers
The domain 21lu.cn is delegated to these four name servers: ns1.julydns.com, ns2.julydns.com, ns1.onclouddns.com and ns2.onclouddns.com.
There is at least partial name server overlap between 21lu.cn and other domains — 255sf.com, apphn.com, zh-official-xingkongyule.com and two more among them.
These name servers frequently co-occur with the name servers ns1.judns.com and ns2.judns.com.
Each of ns1.julydns.com, ns2.julydns.com, ns1.onclouddns.com and ns2.onclouddns.com has a single IP address — ns1.julydns.com and ns2.julydns.com direct to 162.159.48.223, and ns1.onclouddns.com and ns2.onclouddns.com direct to 162.159.27.251.
These two host names — ns1.julydns.com and ns2.julydns.com — each point to 162.159.48.223 IP addresses.
These two host names — ns1.onclouddns.com and ns2.onclouddns.com — each point to 162.159.27.251 IP addresses.