21-cm.com - robtex.com
21-cm.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 156.245.99.206🇭🇰 AS398823156.245.96.0/19 Fastmos Co Limited | ||||||
| NS | a.share-dns.com ⭐ | ||||||
| A | 172.64.53.25🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| NS | b.share-dns.net | ||||||
| A | 172.64.52.239🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US | ||||||
| SOA | a.share-dns.commaster@share-dns.com serial=1768459626 | ||||||
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=1776130282 | ||||||
Same first word
21-cm.com |
Similar names
DNS History
7 records (3 active, 4 former)
●NSa.share-dns.com2026-04-14 → 2026-04-14 · 2 obs
● 2026-04-14 01:58:28
●NSb.share-dns.net2026-04-14 → 2026-04-14 · 2 obs
● 2026-04-14 01:58:28
○NSdns.bizcn.com2017-04-21 → 2017-04-21 · 3 obs
● 2017-04-21 01:09:16
○ 2026-04-14 01:58:28
○NSns1.dns.com.cn2015-05-22 → 2017-04-21 · 3 obs
● 2017-04-21 01:09:16
○ 2026-04-14 01:58:28
○NSns2.dns.com.cn2015-05-22 → 2017-04-21 · 3 obs
● 2017-04-21 01:09:16
○ 2026-04-14 01:58:28
○A124.173.144.1922015-05-22 → 2016-04-09 · 4 obs
● 2016-04-09 23:24:42
○ 2017-04-21 01:09:16
○ 2026-04-14 01:58:28
●A156.245.99.2062026-04-14 → 2026-04-14 · 2 obs
● 2026-04-14 01:58:28
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | h.gtld-servers.net, i.gtld-servers.net, j.gtld-servers.net, k.gtld-servers.net... | - |
| 21-cm.com | a.share-dns.com, b.share-dns.net | 1 record |
✅ Authoritative Response
Server:172.64.53.25
NS records: a.share-dns.com, b.share-dns.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for 21-cm.com (unsigned zone)
⏱️ Timing
Total: 160ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 156.245.99.206 |
| NS | 2 | a.share-dns.com, b.share-dns.net |
| SOA | 1 | a.share-dns.com master.share-dns.com |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (a.share-dns.com)
Analysis
IP Addresses
21-cm.com points to IP number 156.245.99.206.
For instance, other host names tjrongpu.com, www.72ck.com, 72ck.com, zjytkd.com and cqlinmai.com share IP numbers with 21-cm.com.
Name Servers
21-cm.com is delegated to two name servers: a.share-dns.com and b.share-dns.net.
21-cm.com uses the same name server setup as other domains such as huatusm.com, xuecheng100.com, hbljzl.com, adakeji.com and z-xm.com.
21-cm.com shares name servers with other domains at least partially, for example ttbatv.icu, snkepu.com, 0746waji.com, pueblomag.com and driveuberhouston.com.
these name servers are often used with the following: a8.share-dns.com, b8.share-dns.net, a9.share-dns.com, b9.share-dns.net, a4.share-dns.com, b4.share-dns.net, a12.share-dns.com, b12.share-dns.net, a3.share-dns.com and b3.share-dns.net.
Host names with one IP number:
a.share-dns.com points to: 172.64.53.25.
b.share-dns.net points to: 172.64.52.239.