c21k.com - robtex.com
c21k.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.33.251.168🇺🇸 Amazon3.33.240.0/20 | ||||||
| PTR | aec037177372cc6cd.awsglobalaccelerator.com | ||||||
| A | 15.197.225.128🇺🇸 Amazon15.197.224.0/20 | ||||||
| NS | ns39.domaincontrol.com ⭐ | ||||||
| A | 2603:5:21d1::14🇺🇸 GODADDY-DNS2603:5:21d0::/44 | ||||||
| PTR | ns39.domaincontrol.com | ||||||
| A | 97.74.109.20🇺🇸 GODADDY-DNS97.74.108.0/23 | ||||||
| PTR | ns39.domaincontrol.com | ||||||
| NS | ns40.domaincontrol.com | ||||||
| A | 2603:5:22d1::14🇺🇸 GODADDY-DNS2603:5:22d0::/44 | ||||||
| PTR | ns40.domaincontrol.com | ||||||
| A | 173.201.77.20🇺🇸 GODADDY-DNS173.201.76.0/23 | ||||||
| PTR | ns40.domaincontrol.com | ||||||
| SOA | ns39.domaincontrol.comdns@jomax.net 2026-07-06 #5 | ||||||
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=1785661292 | ||||||
Same first word
c21k.com |
Similar names
kc21.cn |
c12k.com |
k12c.net |
ck12.net |
k21c.com |
21kc.cn |
ck21.site |
12ck.com |
21kc.com |
kc21.com |
ck12.co |
ck12.it |
kc12.cc |
kc12.com |
21kc.net |
ck12.cn |
ck21.com |
ck12.org |
DNS History
22 records (4 active, 18 former)
○NSns33.g3m.net2008-03-18 → 2008-03-18 · 3 obs
● 2008-03-18 14:26:22
○ 2015-07-15 16:34:16
○ 2026-08-02 09:02:22
○ 2015-07-15 16:34:16
○ 2026-08-02 09:02:22
○NSns34.g3m.net2008-03-18 → 2008-03-18 · 3 obs
● 2008-03-18 14:26:22
○ 2015-07-15 16:34:16
○ 2026-08-02 09:02:22
○ 2015-07-15 16:34:16
○ 2026-08-02 09:02:22
●NSns39.domaincontrol.com2026-07-21 → 2026-08-02 · 3 obs
○ 2016-12-14 09:57:00
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
●NSns40.domaincontrol.com2026-07-21 → 2026-08-02 · 3 obs
○ 2016-12-14 09:57:00
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
○NSns41.domaincontrol.com2015-11-25 → 2016-12-14 · 7 obs
○ 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
○NSns42.domaincontrol.com2015-11-25 → 2016-12-14 · 7 obs
○ 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
○NSns49.domaincontrol.com2016-04-21 → 2016-04-21 · 4 obs
○ 2016-04-10 17:08:08
● 2016-04-21 19:12:10
○ 2016-12-14 09:57:00
○ 2026-08-02 09:02:22
● 2016-04-21 19:12:10
○ 2016-12-14 09:57:00
○ 2026-08-02 09:02:22
○NSns50.domaincontrol.com2016-04-21 → 2016-04-21 · 4 obs
○ 2016-04-10 17:08:08
● 2016-04-21 19:12:10
○ 2016-12-14 09:57:00
○ 2026-08-02 09:02:22
● 2016-04-21 19:12:10
○ 2016-12-14 09:57:00
○ 2026-08-02 09:02:22
○NSns51.domaincontrol.com2015-11-25 → 2015-11-25 · 4 obs
○ 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
○NSns52.domaincontrol.com2015-11-25 → 2015-11-25 · 4 obs
○ 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
○NSns67.domaincontrol.com2016-02-29 → 2016-02-29 · 4 obs
○ 2015-11-25 03:38:00
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
○ 2026-08-02 09:02:22
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
○ 2026-08-02 09:02:22
○NSns68.domaincontrol.com2016-02-29 → 2016-02-29 · 4 obs
○ 2015-11-25 03:38:00
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
○ 2026-08-02 09:02:22
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
○ 2026-08-02 09:02:22
○NSns71.domaincontrol.com2016-04-10 → 2016-04-10 · 4 obs
○ 2016-02-29 02:15:58
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
○NSns72.domaincontrol.com2016-04-10 → 2016-04-10 · 4 obs
○ 2016-02-29 02:15:58
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
○NSns75.domaincontrol.com2015-07-15 → 2015-11-25 · 5 obs
○ 2008-03-18 14:26:22
● 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
● 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
○NSns76.domaincontrol.com2015-07-15 → 2015-11-25 · 5 obs
○ 2008-03-18 14:26:22
● 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
● 2015-07-15 16:34:16
● 2015-11-25 03:38:00
○ 2016-02-29 02:15:58
○ 2026-08-02 09:02:22
○MXmailstore1.secureserver.net2015-07-15 → 2016-12-14 · 5 obs
○ 2008-03-18 14:26:22
● 2015-07-15 16:34:16
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
● 2015-07-15 16:34:16
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
○MXsmtp.secureserver.net2015-07-15 → 2016-12-14 · 5 obs
○ 2008-03-18 14:26:22
● 2015-07-15 16:34:16
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
● 2015-07-15 16:34:16
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
●A15.197.225.1282026-07-21 → 2026-08-02 · 3 obs
○ 2016-12-14 09:57:00
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
○A184.168.221.222015-07-15 → 2016-12-14 · 8 obs
○ 2008-03-18 14:26:22
● 2015-07-15 16:34:16
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
● 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
● 2015-07-15 16:34:16
● 2016-02-29 02:15:58
○ 2016-04-10 17:08:08
● 2016-04-21 19:12:10
● 2016-12-14 09:57:00
○ 2026-07-21 11:40:18
○ 2026-08-02 09:02:22
○A184.168.221.752016-04-10 → 2016-04-10 · 4 obs
○ 2016-02-29 02:15:58
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
● 2016-04-10 17:08:08
○ 2016-04-21 19:12:10
○ 2026-08-02 09:02:22
●A3.33.251.1682026-07-21 → 2026-08-02 · 3 obs
○ 2016-12-14 09:57:00
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
● 2026-07-21 11:40:18
● 2026-08-02 09:02:22
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| c21k.com | ns39.domaincontrol.com, ns40.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:97.74.109.20
NS records: ns39.domaincontrol.com, ns40.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for c21k.com (unsigned zone)
⏱️ Timing
Total: 104ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 15.197.225.128, 3.33.251.168 |
| NS | 2 | ns40.domaincontrol.com, ns39.domaincontrol.com |
| SOA | 1 | ns39.domaincontrol.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns39.domaincontrol.com, ns39.domaincontrol.com, ns40.domaincontrol.com...)
Analysis
IP Addresses
c21k.com resolves to the IP addresses 3.33.251.168 and 15.197.225.128
Among the host names that share IP numbers with c21k.com are signifyhealthcare.org, marvinwindowanddoor.com, 5roses.com and two others.
Name Servers
c21k.com uses two name servers for its delegation: ns39.domaincontrol.com and ns40.domaincontrol.com.
c21k.com has the same name server delegation as a number of other domains, such as businessportraitnyc.com, lexgomow.org, 247dispatcher.com and two more.
The two host names ns39.domaincontrol.com and ns40.domaincontrol.com each have a pair of IP addresses: ns39.domaincontrol.com has 97.74.109.20 and 2603:5:21d1::14, and ns40.domaincontrol.com has 173.201.77.20 and 2603:5:22d1::14.