coursebest.cn - robtex.com
coursebest.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 175.27.236.147🇨🇳 TENCENT-NET-AP175.27.192.0/18 | ||||||
| NS | bank.dnspod.net ⭐ | ||||||
| A | 2402:4e00:1470:2::e🇨🇳 TENCENT-NET-AP2402:4e00:1400::/40 | ||||||
| A | 1.12.0.4🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM | ||||||
| A | 1.14.119.35🇨🇳 TENCENT-NET-AP1.14.64.0/18 | ||||||
| A | 111.13.13.35🇨🇳 CHINAMOBILE-CN111.13.0.0/16 CMI (Customer Route) | ||||||
| A | 117.89.178.35🇨🇳 ChinaNet-NANJING-JISHAN-IDC117.89.176.0/21 JS-CT NJ-JS-IDC | ||||||
| A | 220.196.136.35🇨🇳 UNICOM-SHFT-IDC220.196.136.0/24 | ||||||
| NS | lesley.dnspod.net | ||||||
| A | 2402:4e00:111:fff::c🇨🇳 TENCENT-NET-AP2402:4e00::/35 | ||||||
| A | 1.12.0.1🇨🇳 TENCENT-NET-AP-CN1.12.0.0/20 ZL-IDC-BOM | ||||||
| A | 1.13.76.35🇨🇳 TENCENT-NET-AP1.13.64.0/18 | ||||||
| A | 36.155.149.35🇨🇳 CMNET-Jiangsu-AP36.155.144.0/21 CMI (Customer Route) | ||||||
| A | 101.227.168.35🇨🇳 SHANGHAITELECOM101.227.168.0/23 SHIDC | ||||||
| A | 111.206.98.235🇨🇳 CHINA169-BJ111.206.98.0/24 | ||||||
| SOA | bank.dnspod.netfreednsadmin@dnspod.com serial=1777447453 | ||||||
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=2035056972 | ||||||
Same first word
coursebest.cn |
coursebest.com |
Similar names
DNS History
3 records (3 active, 0 former)
●NSbank.dnspod.net2026-06-20 → 2026-07-18 · 2 obs
● 2026-07-18 16:28:28
●NSlesley.dnspod.net2026-06-20 → 2026-07-18 · 2 obs
● 2026-07-18 16:28:28
●A175.27.236.1472026-06-20 → 2026-07-18 · 2 obs
● 2026-07-18 16:28:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | e.dns.cn, a.dns.cn, c.dns.cn, d.dns.cn... | - |
| coursebest.cn | bank.dnspod.net, lesley.dnspod.net | - |
✅ Authoritative Response
Server:1.12.0.1
NS records: bank.dnspod.net, lesley.dnspod.net
🔒 DNSSEC Status
❌ Bogus (DNSSEC validation failed)
Validation error at coursebest.cn: Error: DNS query timeout: 203.119.29.1 for DS coursebest.cn
⏱️ Timing
Total: 4653ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 175.27.236.147 |
| NS | 2 | bank.dnspod.net, lesley.dnspod.net |
| SOA | 1 | bank.dnspod.net freednsadmin.dnspod.com |
Analysis
IP Addresses
coursebest.cn resolves to just one IP address, 175.27.236.147.
Name Servers
The NS records for coursebest.cn delegate to bank.dnspod.net and lesley.dnspod.net.
coursebest.cn shares its NS records with other domains, for example peoplee.online, 6891.app, mmbang.info and two others.
coursebest.cn and other domains like mmbang.com share at least a portion of their name servers.
DNS names with 6 IP addresses:
bank.dnspod.net maps to 1.12.0.4, 1.14.119.35, 111.13.13.35 and 3 additional IP addresses.
lesley.dnspod.net maps to 1.12.0.1, 1.13.76.35, 36.155.149.35 and 3 additional IP addresses.