b2b.sd.cn - robtex.com
b2b.sd.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 156.226.84.139 | ||||||
| NS | hayes.ns.cloudflare.com ⭐ | ||||||
| NS | zelda.ns.cloudflare.com | ||||||
| SOA | hayes.ns.cloudflare.comdns@cloudflare.com serial=2404761999 | ||||||
sd.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=2027240190 | ||||||
DNS History
3 records (3 active, 0 former)
●NShayes.ns.cloudflare.com2026-05-17 → 2026-06-07 · 2 obs
● 2026-05-17 07:14:06
● 2026-06-07 17:03:28
● 2026-06-07 17:03:28
●NSzelda.ns.cloudflare.com2026-05-17 → 2026-06-07 · 2 obs
● 2026-05-17 07:14:06
● 2026-06-07 17:03:28
● 2026-06-07 17:03:28
●A156.226.84.1392026-05-17 → 2026-06-07 · 2 obs
● 2026-05-17 07:14:06
● 2026-06-07 17:03:28
● 2026-06-07 17:03:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | b.dns.cn, d.dns.cn, e.dns.cn, c.dns.cn... | - |
| b2b.sd.cn | hayes.ns.cloudflare.com, zelda.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.32.242
NS records: hayes.ns.cloudflare.com, zelda.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for b2b.sd.cn (unsigned zone)
⏱️ Timing
Total: 4357ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 156.226.84.139 |
| NS | 2 | hayes.ns.cloudflare.com, zelda.ns.cloudflare.com |
| SOA | 1 | hayes.ns.cloudflare.com dns.cloudflare.c |
Analysis
IP Addresses
b2b.sd.cn points to a single IP number: 156.226.84.139.
Name Servers
Two name servers handle the delegation for b2b.sd.cn: hayes.ns.cloudflare.com and zelda.ns.cloudflare.com.