linux.ac.cn - robtex.com
linux.ac.cn
ac.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a.dns.cn ⭐ ⚠️ Not in parent delegation | ||||||
| NS | b.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | c.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | cns.cernet.net ⚠️ Not in parent delegation | ||||||
| NS | d.dns.cn ⚠️ Not in parent delegation | ||||||
| NS | e.dns.cn ⚠️ Not in parent delegation | ||||||
| SOA | a.dns.cnroot@cnnic.cn serial=2027268038 | ||||||
Subdomains
www.linux.ac.cn |
Same first word
Similar names
DNS History
6 records (5 active, 1 former)
●NSf1g1ns1.dnspod.net2026-02-24 → 2026-04-23 · 2 obs
● 2026-04-23 11:47:58
●NSf1g1ns2.dnspod.net2026-02-24 → 2026-04-23 · 2 obs
● 2026-04-23 11:47:58
●A43.139.165.1432026-02-24 → 2026-04-23 · 2 obs
● 2026-04-23 11:47:58
○CNAMElinux.ac.cn.a.bdydns.com2018-08-18 → 2018-08-18 · 3 obs
○ 2026-02-24 16:17:04
○ 2026-04-23 11:47:58
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn... | - |
| linux.ac.cn | f1g1ns1.dnspod.net, f1g1ns2.dnspod.net | - |
✅ Authoritative Response
Server:101.227.168.35
NS records: f1g1ns1.dnspod.net, f1g1ns2.dnspod.net
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at linux.ac.cn: Error: DNS query timeout: 203.119.29.1 for DS linux.ac.cn
⏱️ Timing
Total: 3841ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 43.139.165.143 |
| NS | 2 | f1g1ns2.dnspod.net, f1g1ns1.dnspod.net |
| MX | 2 | mxbiz1.qq.com (pri: 5), mxbiz2.qq.com (pri: 10) |
| TXT | 1 | v=spf1 include:spf.mail.qq.com ~all |
| SOA | 1 | f1g1ns1.dnspod.net freednsadmin.dnspod.c |
Analysis
Hierarchy
linux.ac.cn is a parent of www.linux.ac.cn.
IP Addresses
linux.ac.cn points to a single IP number: 43.139.165.143.
Other host names, for instance www.linux.ac.cn, share IP numbers with linux.ac.cn.
Name Servers
Delegation for linux.ac.cn rests with two name servers, f1g1ns1.dnspod.net and f1g1ns2.dnspod.net.
linux.ac.cn shares the same name server setup as other domains, including wanmaholding.cn, tdf001.com, dafabj.com, 58cn.com and cacaren.com.
linux.ac.cn at least partially shares name servers with other domains, for instance dhfjs.cn, interac-connect.com, dianche.org, jdbjsncsfd09.icu and kriy.cn.
These name servers are often used together with a.dnspod.com, c.dnspod.com, b.dnspod.com, ns11.xincache.com and ns12.xincache.com.
Host names with eight IP numbers:
f1g1ns2.dnspod.net points to: 2402:4e00:111:fff::c, 1.12.0.1, 1.13.76.35, 36.155.149.35, 101.227.168.35, 106.39.207.235, 111.206.98.235 and 220.196.136.35.
Host names with seven IP numbers:
f1g1ns1.dnspod.net points to: 2402:4e00:1470:2::e, 1.12.0.4, 1.14.119.35, 111.13.13.35, 117.135.128.235, 125.94.59.235 and 163.177.5.35.
Mail Servers
linux.ac.cn is handled by two mail servers: mxbiz1.qq.com and mxbiz2.qq.com.
linux.ac.cn uses the same mail server configuration as other domains, such as hhgk.cn, qdruipeng.com, mio-labs.com, goldant.com.cn and moyisi.com.
linux.ac.cn shares mail servers with other domains, at least partially, for instance lphiz.com and googo.us.