21dns.net - robtex.com
21dns.net
| DNSSEC | ⚠️ Not signed | ||||||
| NS | ns7.alidns.com ⭐ | ||||||
| A | 2408:4009:501::3🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.47🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.57🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.207🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.217🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.47🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.57🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.117🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.127🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| NS | ns8.alidns.com | ||||||
| A | 2408:4009:501::4🇨🇳 Alibaba-Cloud2408:4009:501::/48 | ||||||
| A | 39.96.153.48🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 39.96.153.58🇨🇳 Alibaba-Cloud39.96.0.0/14 CT BeiJing IDC | ||||||
| A | 47.118.199.208🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 47.118.199.218🇨🇳 Alibaba-Cloud47.118.128.0/17 Alibaba (US) Technology Co., Ltd. | ||||||
| A | 120.76.107.48🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 120.76.107.58🇨🇳 Alibaba-Cloud120.76.0.0/17 | ||||||
| A | 139.224.142.101🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| A | 139.224.142.118🇨🇳 Alibaba-Cloud139.224.128.0/17 China Internet Network Information Center Floor1, Building No.1 C/-Chinese Academy of Sciences 4, South 4th Street Haidian District, | ||||||
| SOA | ns7.alidns.comhostmaster@hichina.com 2026-01-12 #9 | ||||||
net
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | a.gtld-servers.net ⭐ | ||||||
| NS | b.gtld-servers.net | ||||||
| NS | c.gtld-servers.net | ||||||
| NS | d.gtld-servers.net | ||||||
| NS | e.gtld-servers.net | ||||||
| NS | f.gtld-servers.net | ||||||
| NS | g.gtld-servers.net | ||||||
| NS | h.gtld-servers.net | ||||||
| NS | i.gtld-servers.net | ||||||
| NS | j.gtld-servers.net | ||||||
| NS | k.gtld-servers.net | ||||||
| NS | l.gtld-servers.net | ||||||
| NS | m.gtld-servers.net | ||||||
| SOA | a.gtld-servers.netnstld@verisign-grs.com serial=1774493522 | ||||||
Subdomains
mail.21dns.net |
Same first word
21dns.net |
Similar names
dns21.org |
snd21.net |
dsn21.com |
12dns.net |
dns12.net.au |
dns21.co.uk |
nsd12.com |
12dns.com |
dns12.com.au |
21nds.com |
dns21.jp |
dns12.co.uk |
DNS History
6 records (2 active, 4 former)
○NSns1.cnolnic.com2015-08-03 → 2016-10-07 · 4 obs
● 2016-10-07 06:34:52
○ 2026-03-07 01:33:54
○ 2026-03-26 03:13:36
○NSns2.cnolnic.com2015-08-03 → 2016-10-07 · 4 obs
● 2016-10-07 06:34:52
○ 2026-03-07 01:33:54
○ 2026-03-26 03:13:36
●NSns7.alidns.com2026-03-07 → 2026-03-26 · 3 obs
● 2026-03-07 01:33:54
● 2026-03-26 03:13:36
●NSns8.alidns.com2026-03-07 → 2026-03-26 · 3 obs
● 2026-03-07 01:33:54
● 2026-03-26 03:13:36
○MXmail.21dns.net2015-08-03 → 2016-10-07 · 4 obs
● 2016-10-07 06:34:52
○ 2026-03-07 01:33:54
○ 2026-03-26 03:13:36
○A58.221.36.2352015-08-03 → 2016-10-07 · 4 obs
● 2016-10-07 06:34:52
○ 2026-03-07 01:33:54
○ 2026-03-26 03:13:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | m.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net... | - |
| 21dns.net | ns7.alidns.com, ns8.alidns.com | - |
✅ Authoritative Response
Server:139.224.142.118
NS records: ns7.alidns.com, ns8.alidns.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21dns.net (unsigned zone)
⏱️ Timing
Total: 1352ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| NS | 2 | ns8.alidns.com, ns7.alidns.com |
| SOA | 1 | ns7.alidns.com hostmaster.hichina.com |
Analysis
Hierarchy
21dns.net is the parent of mail.21dns.net.
Name Servers
21dns.net has two name servers: ns7.alidns.com and ns8.alidns.com.
21dns.net shares the same name server setup as other domains, for example xswpower.com, paylosd.cc, xbiqugeo.com, fiu07041kl.com and by6622.com.
21dns.net shares some name servers with other domains, for example thestrategist.us, tskang.com, fridayinathens.com, 5555622ab8.shop and gaomeilu.com.
These name servers are commonly used alongside expirens3.hichina.com, expirens4.hichina.com, ns1.alidns.com and ns2.alidns.com.
Host names with nine IP numbers:
ns7.alidns.com points to 2408:4009:501::3, 39.96.153.47, 39.96.153.57, 47.118.199.207, 47.118.199.217, 120.76.107.47, 120.76.107.57, 139.224.142.117 and 139.224.142.127.
ns8.alidns.com points to 2408:4009:501::4, 39.96.153.48, 39.96.153.58, 47.118.199.208, 47.118.199.218, 120.76.107.48, 120.76.107.58, 139.224.142.101 and 139.224.142.118.