block21.cn - robtex.com
block21.cn
| DNSSEC | ⚠️ Not signed | ||||||
| A | 2606:4700:3030::6815:695🇺🇸 Cloudflare2606:4700:3030::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 2606:4700:3035::ac43:86e7🇺🇸 Cloudflare2606:4700:3035::/48 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 104.21.6.149Cloudflare104.21.0.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| A | 172.67.134.231🇺🇸 Cloudflare172.67.128.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US ✓ In HTTPS hints | ||||||
| NS | ajay.ns.cloudflare.com ⭐ | ||||||
| A | 2606:4700:58::adf5:3b38🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c138🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:2138🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| A | 108.162.193.56🇺🇸 Cloudflare108.162.193.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| A | 172.64.33.56🇺🇸 Cloudflare172.64.33.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| A | 173.245.59.56🇺🇸 Cloudflare173.245.59.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | ajay.ns.cloudflare.com | ||||||
| NS | olivia.ns.cloudflare.com | ||||||
| A | 2606:4700:50::a29f:26dd🇺🇸 Cloudflare2606:4700:50::/44 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| A | 2803:f800:50::6ca2:c2dd🇨🇷 Cloudflare2803:f800:50::/45 LACNIC generated route6 for CloudFlare Latin America S.R.L | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| A | 2a06:98c1:50::ac40:22dd🇺🇸 Cloudflare2a06:98c1:50::/45 | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| A | 108.162.194.221🇺🇸 Cloudflare108.162.194.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| A | 162.159.38.221Cloudflare162.159.32.0/20 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| A | 172.64.34.221🇺🇸 Cloudflare172.64.34.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| PTR | olivia.ns.cloudflare.com | ||||||
| HTTPS | HTTP/3, HTTP/2 ✓ hints match | ||||||
| IPv4 hints | 104.21.6.149, 172.67.134.231 | ||||||
| IPv6 hints | 2606:4700:3030::6815:695, 2606:4700:3035::ac43:86e7 | ||||||
| ECH | X25519, HKDF-SHA256 + AES-128-GCM draft, id=189, name=cloudflare-ech.com | ||||||
| SOA | ajay.ns.cloudflare.comdns@cloudflare.com serial=2399055894 | ||||||
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=2034625138 | ||||||
Subdomains
www.block21.cn |
Same first word
block21.myshopify.com |
block21.cn |
Similar names
DNS History
6 records (6 active, 0 former)
●NSajay.ns.cloudflare.com2026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
●NSolivia.ns.cloudflare.com2026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
●A104.21.6.1492026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
●A172.67.134.2312026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
●A2606:4700:3030::6815:6952026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
●A2606:4700:3035::ac43:86e72026-04-01 → 2026-04-02 · 2 obs
● 2026-04-02 11:54:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| cn | a.dns.cn, b.dns.cn, c.dns.cn, d.dns.cn... | - |
| block21.cn | ajay.ns.cloudflare.com, olivia.ns.cloudflare.com | - |
✅ Authoritative Response
Server:172.64.34.221
NS records: ajay.ns.cloudflare.com, olivia.ns.cloudflare.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for block21.cn (unsigned zone)
⏱️ Timing
Total: 1090ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 172.67.134.231, 104.21.6.149 |
| AAAA | 2 | 2606:4700:3035::ac43:86e7, 2606:4700:3030::6815:695 |
| NS | 2 | ajay.ns.cloudflare.com, olivia.ns.cloudflare.com |
| HTTPS | 1 | {"priority":1,"target":".","alpn":["h3", |
| SOA | 1 | ajay.ns.cloudflare.com dns.cloudflare.co |
Analysis
Hierarchy
The parent of www.block21.cn is block21.cn.
IP Addresses
block21.cn resolves to four IP numbers: 2606:4700:3030::6815:695, 2606:4700:3035::ac43:86e7, 104.21.6.149 and 172.67.134.231.
Other host names such as rinuploads.org, cwt96.com, shilohonline.com, lnt.lv and sccsmm.com share IPs with block21.cn.
Name Servers
block21.cn is delegated to two name servers: ajay.ns.cloudflare.com and olivia.ns.cloudflare.com.
block21.cn shares the same name server setup as 51pmc.cn, mtdpch.cn, g1727.cn, sswrj.cn and hezhongshe.cn.
block21.cn at least partially shares name servers with other domains, for instance 365forgeflare.sbs, sxluante.com, cdynxlh.com, corexventures.click and helpi.com.br.
These name servers are commonly used together with peyton.ns.cloudflare.com, paityn.ns.cloudflare.com and abby.ns.cloudflare.com.
Host names with six IP numbers:
ajay.ns.cloudflare.com points to 2606:4700:58::adf5:3b38, 2803:f800:50::6ca2:c138, 2a06:98c1:50::ac40:2138, 108.162.193.56, 172.64.33.56 and 173.245.59.56.
olivia.ns.cloudflare.com points to 2606:4700:50::a29f:26dd, 2803:f800:50::6ca2:c2dd, 2a06:98c1:50::ac40:22dd, 108.162.194.221, 162.159.38.221 and 172.64.34.221.