51nbb.cn - robtex.com
51nbb.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3032::ac43:ccfa🇺🇸 Cloudflare2606:4700:3032::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3033::6815:2ce9🇺🇸 Cloudflare2606:4700:3033::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.44.233Cloudflare104.21.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.204.250🇺🇸 Cloudflare172.67.192.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | coraline.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:50::a29f:2658🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c258🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2258🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| A | 108.162.194.88🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| A | 162.159.38.88Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| A | 172.64.34.88🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | coraline.ns.cloudflare.com | ||||||
| NS | ishaan.ns.cloudflare.com | ||||||
| A | 2606:4700:58::a29f:2cd5🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c3d5🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:23d5🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| A | 108.162.195.213🇺🇸 Cloudflare108.162.195.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| A | 162.159.44.213Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| A | 172.64.35.213🇺🇸 Cloudflare172.64.35.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ishaan.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.44.233, 172.67.204.250 | ||||||
| IPv6 hints | 2606:4700:3032::ac43:ccfa, 2606:4700:3033::6815:2ce9 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=165, name=cloudflare-ech.com | ||||||
| SOA | coraline.ns.cloudflare.comdns@cloudflare.com serial=2399645465 | ||||||
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=2034670883 | ||||||
Same first word
51nbb.cn |
Similar names
DNS History
8 records (6 active, 2 former)
●NScoraline.ns.cloudflare.com2026-04-01 → 2026-04-14 · 2 obs
● 2026-04-14 23:30:48
●NSishaan.ns.cloudflare.com2026-04-01 → 2026-04-14 · 2 obs
● 2026-04-14 23:30:48
●A104.21.44.2332026-04-01 → 2026-04-14 · 4 obs
○ 2026-04-01 19:54:40
● 2026-04-14 23:30:46
● 2026-04-14 23:30:48
●A172.67.204.2502026-04-01 → 2026-04-14 · 4 obs
○ 2026-04-01 19:54:40
● 2026-04-14 23:30:46
● 2026-04-14 23:30:48
○A188.114.96.02026-04-01 → 2026-04-01 · 4 obs
● 2026-04-01 19:54:40
○ 2026-04-14 23:30:46
○ 2026-04-14 23:30:48
○A188.114.97.02026-04-01 → 2026-04-01 · 4 obs
● 2026-04-01 19:54:40
○ 2026-04-14 23:30:46
○ 2026-04-14 23:30:48
●A2606:4700:3032::ac43:ccfa2026-04-01 → 2026-04-14 · 2 obs
● 2026-04-14 23:30:48
●A2606:4700:3033::6815:2ce92026-04-01 → 2026-04-14 · 2 obs
● 2026-04-14 23:30:48
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, c.dns.cn, e.dns.cn, d.dns.cn... | - |
| 51nbb.cn | ishaan.ns.cloudflare.com, coraline.ns.cloudflare.com | - |
✅ Authoritative Response
Server:108.162.194.88
NS records: ishaan.ns.cloudflare.com, coraline.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 51nbb.cn (unsigned zone)
⏱️ Timing
Total: 1051ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.204.250, 104.21.44.233 |
| AAAA | 2 | 2606:4700:3032::ac43:ccfa, 2606:4700:3033::6815:2ce9 |
| NS | 2 | coraline.ns.cloudflare.com, ishaan.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | coraline.ns.cloudflare.com dns.cloudflar |
Analysis
IP Addresses
51nbb.cn resolves to four IPs: 2606:4700:3032::ac43:ccfa, 2606:4700:3033::6815:2ce9, 104.21.44.233 and 172.67.204.250.
Other host names, for instance www.bagtojapan.com, cisec.ca, semrush2.xemrush.click, ds2020.online and forestremedies.com share IP numbers with 51nbb.cn.
Name Servers
51nbb.cn has two name servers: coraline.ns.cloudflare.com and ishaan.ns.cloudflare.com.
51nbb.cn shares the same name server setup as other domains, for example nevadacharters.org, nitdgplug.org, liujiming.cn, idevoo.com and zzzzc.cn.
51nbb.cn shares some name servers with other domains, for example pankasyno7.com, harrisontran.com, arzan.com.kw, finclab.com and saintclare.ed.cr.
These name servers are often used together with rocco.ns.cloudflare.com, marissa.ns.cloudflare.com and albert.ns.cloudflare.com.
Host names with six IP numbers: coraline.ns.cloudflare.com points to: 2606:4700:50::a29f:2658, 2803:f800:50::6ca2:c258, 2a06:98c1:50::ac40:2258, 108.162.194.88, 162.159.38.88 and 172.64.34.88; ishaan.ns.cloudflare.com points to: 2606:4700:58::a29f:2cd5, 2803:f800:50::6ca2:c3d5, 2a06:98c1:50::ac40:23d5, 108.162.195.213, 162.159.44.213 and 172.64.35.213.