21721.com - robtex.com
21721.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.0.41.219🇸🇬 Amazon3.0.0.0/15 EC2 SIN prefix | ||||||
| PTR | ec2-3-0-41-219.ap-southeast-1.compute.amazonaws.com | ||||||
| A | 103.39.111.106🇭🇰 CLOUDIE-AS-AP103.39.110.0/23 Cloudie Limited Unit 1604, Perfect Industrial Building, 31st Tai Yau Street | ||||||
| NS | ns1.ename.net ⭐ | ||||||
| A | 2001:df2:f080:1::8🇭🇰 HKCICL-AS-AP2001:df2:f080::/48 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| A | 61.158.128.31🇨🇳 CHINA169-Backbone61.158.128.0/17 CNC Group CHINA169 Henan Province Network | ||||||
| PTR | 31.128.158.61.ha.cnc | ||||||
| A | 218.98.111.173🇩🇪 HKCICL-AS-AP218.98.111.0/24 HONG KONG COMMUNICATIONS INTERNATIONAL CO.,LIMITED | ||||||
| NS | ns2.ename.net | ||||||
| A | 240e:97d:10:1402:0:1:0:1005🇨🇳 CHINANET-Guangdong-DongGuan-IDC240e:97d::/36 DongGuan IDC Network | ||||||
| A | 1.193.216.198🇨🇳 CHINANET-Henan-Luoyang-IDC1.193.216.0/24 Chinatelecom HeNan Province Network | ||||||
| A | 183.253.57.199🇨🇳 CHINAMOBILE-CN183.253.0.0/16 CMI (Customer Route) | ||||||
| A | 211.99.99.52🇨🇳 DONGGUAN-1211.99.99.0/24 Proxy-registered route object | ||||||
| SOA | ns1.ename.netadmin@ename.net serial=1751342709 | ||||||
com
| 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=1783786712 | ||||||
Same first word
Similar names
DNS History
9 records (4 active, 5 former)
○NS62ns1.dns.com2017-04-24 → 2017-04-24 · 4 obs
● 2017-04-24 03:07:06
○ 2026-07-04 16:14:40
○ 2026-07-11 16:43:16
○NSa.ns.ultsearch.com2008-03-18 → 2008-03-18 · 3 obs
○ 2015-06-12 05:36:30
○ 2026-07-11 16:43:16
○NSb.ns.ultsearch.com2008-03-18 → 2008-03-18 · 3 obs
○ 2015-06-12 05:36:30
○ 2026-07-11 16:43:16
●NSns1.ename.net2026-07-04 → 2026-07-11 · 3 obs
● 2026-07-04 16:14:40
● 2026-07-11 16:43:16
●NSns2.ename.net2026-07-04 → 2026-07-11 · 3 obs
● 2026-07-04 16:14:40
● 2026-07-11 16:43:16
●A103.39.111.1062026-07-04 → 2026-07-11 · 3 obs
● 2026-07-04 16:14:40
● 2026-07-11 16:43:16
○A202.153.95.342016-09-25 → 2016-09-25 · 4 obs
● 2016-09-25 17:57:54
○ 2017-04-24 03:07:06
○ 2026-07-11 16:43:16
●A3.0.41.2192026-07-04 → 2026-07-11 · 3 obs
● 2026-07-04 16:14:40
● 2026-07-11 16:43:16
○A66.116.125.2092008-03-18 → 2008-03-18 · 3 obs
○ 2015-06-12 05:36:30
○ 2026-07-11 16:43:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| 21721.com | ns1.ename.net, ns2.ename.net | - |
✅ Authoritative Response
Server:1.193.216.198
NS records: ns1.ename.net, ns2.ename.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21721.com (unsigned zone)
⏱️ Timing
Total: 4556ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 103.39.111.106, 3.0.41.219 |
| NS | 2 | ns1.ename.net, ns2.ename.net |
| SOA | 1 | ns1.ename.net admin.ename.net |
Analysis
IP Addresses
21721.com resolves to the IP addresses 3.0.41.219 and 103.39.111.106
Two other host names, along with 5328.com, klpk.com and 392qp.com, also share IP numbers with 21721.com.
Name Servers
The NS records for 21721.com delegate to ns1.ename.net and ns2.ename.net.
21721.com shares its NS records with other domains, for example chongmao.cn, hlwlw.com, ounn.com and two others.
21721.com shares at least some of its name servers with other domains, including vbull.com, qthr.com, liushi.com and two others.
These name servers are frequently paired with the name servers ns3.dns.com and ns4.dns.com.
Host names that resolve to four IP numbers:
ns2.ename.net points to 1.193.216.198, 183.253.57.199, 211.99.99.52 and 240e:97d:10:1402:0:1:0:1005.
Hostnames that map to three IP numbers:
ns1.ename.net maps to three IP addresses: 61.158.128.31, 218.98.111.173 and 2001:df2:f080:1::8.