build.cn - robtex.com
build.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns1.sfn.cn ⭐ | ||||||
| A | 111.63.77.29🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route) | ||||||
| NS | ns2.sfn.cn | ||||||
| A | 101.37.119.99🇨🇳 Alibaba-Cloud101.37.0.0/17 | ||||||
| A | 111.63.77.30🇨🇳 CMNET-V4HEBEI-AS-AP111.63.64.0/20 CMI (Customer Route) | ||||||
| SOA | ns1.sfn.cnroot@ns1.sfn.cn 2026-08-14 #2 | ||||||
cn
| DNSSEC | ⚠️ Not signed | ||||||
| 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=2035176881 | ||||||
Same first word
Similar names
DNS History
5 records (2 active, 3 former)
●NSns1.sfn.cn2015-11-22 → 2026-08-13 · 3 obs
● 2015-11-22 23:00:38
● 2026-08-13 19:53:18
●NSns2.sfn.cn2015-11-22 → 2026-08-13 · 3 obs
● 2015-11-22 23:00:38
● 2026-08-13 19:53:18
○NSns3.sanfront.com.cn2015-07-01 → 2015-07-01 · 3 obs
○ 2015-11-22 23:00:38
○ 2026-08-13 19:53:18
○NSns5.sanfront.com.cn2015-07-01 → 2015-07-01 · 3 obs
○ 2015-11-22 23:00:38
○ 2026-08-13 19:53:18
○A211.154.167.1882015-07-01 → 2016-12-01 · 4 obs
● 2016-12-01 15:31:52
○ 2026-08-10 10:03:24
○ 2026-08-13 19:53:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn... | - |
| build.cn | ns1.sfn.cn, ns2.sfn.cn | 3 records |
✅ Authoritative Response
Server:101.37.119.99
NS records: ns1.sfn.cn, ns2.sfn.cn
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at build.cn: Error: DNS query timeout: 203.119.29.1 for DS build.cn
⏱️ Timing
Total: 3962ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns2.sfn.cn, ns1.sfn.cn |
| SOA | 1 | ns1.sfn.cn root.ns1.sfn.cn |
📌 Glue Records Collected
Total: 3
Out-of-bailiwick: 3 (ns1.sfn.cn, ns2.sfn.cn, ns2.sfn.cn)
Analysis
Name Servers
The NS records for build.cn delegate to ns1.sfn.cn and ns2.sfn.cn.
build.cn shares its name server setup with other domains, including gzregal.com.cn, sysmath.com, fkjt.com.cn and two others.
build.cn and other domains like optics.org.cn share at least a portion of their name servers.
Host names with two IP numbers:
The A records for ns2.sfn.cn return 101.37.119.99 and 111.63.77.30.
Host names pointing to a single IP address:
ns1.sfn.cn resolves to the IP address 111.63.77.29.