cupl.cn - dns.ninja
cupl.cn
| DNSSEC | ⚠️ Not signed | ||||||
| NS | dns.online.edu.cn ⚠️ Not in zone NS records | ||||||
| A | 2001:da8:20d:40d2::101🇨🇳 CNGI-CERNET2-AS-AP2001:da8:20d::/48 | ||||||
| NS | dns2.online.edu.cn ⚠️ Not in zone NS records | ||||||
| A | 2001:da8:20d:40d2::102🇨🇳 CNGI-CERNET2-AS-AP2001:da8:20d::/48 | ||||||
| A | 202.205.0.2🇨🇳 ERX-CERNET-BKB202.200.0.0/13 | ||||||
| PTR | dns2.online.edu.cn | ||||||
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=2035161540 | ||||||
Same first word
Similar names
DNS History
2 records (2 active, 0 former)
●NSdns.online.edu.cn2015-06-09 → 2026-08-10 · 5 obs
● 2016-12-23 08:56:30
○ 2026-07-10 16:06:44
● 2026-07-30 13:36:16
● 2026-08-10 03:06:00
●NSdns2.online.edu.cn2015-06-09 → 2026-08-10 · 5 obs
● 2016-12-23 08:56:30
○ 2026-07-09 20:23:02
● 2026-07-30 13:36:16
● 2026-08-10 03:06:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
✅ Authoritative Response
Server:203.119.29.1
NS records: a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn, e.dns.cn
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 1126ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
Analysis
Name Servers
Two name servers handle the delegation for cupl.cn: dns2.online.edu.cn and dns.online.edu.cn.
The name server configuration of cupl.cn is shared with other domains, for instance shtvu.cn, xisu.cn, bvca.edu.cn and two others.
Some of cupl.cn's name servers are also used by other domains, including pfc.edu.cn, cugp.cn, lcvtc.cn and xjnzy.cn.
Host names pointing to two IP addresses:
dns2.online.edu.cn resolves to two addresses: 202.205.0.2 and 2001:da8:20d:40d2::102.
Host names resolving to a single IP address:
The hostname dns.online.edu.cn resolves to 2001:da8:20d:40d2::101.