mx.rtcourses.com - dns.ninja
mx.rtcourses.com
| DNSSEC | ⚠️ Not signed | ||||||
rtcourses.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.33.251.168🇺🇸 Amazon3.33.240.0/20 | ||||||
| A | 15.197.225.128🇺🇸 Amazon15.197.224.0/20 | ||||||
| NS | ns21.domaincontrol.com ⭐ | ||||||
| NS | ns22.domaincontrol.com | ||||||
| SOA | ns21.domaincontrol.comdns@jomax.net 2026-05-21 #0 | ||||||
Previously MX for
Same first word
Similar names
xm.de |
xm.cl |
xm.sk |
xm.se |
xm.hu |
xm.com.co |
xm.africa |
xm.fi |
xm.is |
xm.co.kr |
xm.am |
xm.money |
xm.be |
xm.cz |
xm.hk.cn |
xm.fj.cn |
xm.pl |
xm.vn.ua |
xm.house |
xm.mk |
xm.la |
xm.com |
xm.biz |
xm.media |
xm.fyi |
DNS History
3 records (0 active, 3 former)
○A66.96.140.922015-04-27 → 2015-10-23 · 4 obs
● 2015-04-27 17:44:48
● 2015-10-23 23:41:06
○ 2016-01-01 11:46:54
○ 2026-07-17 17:29:18
● 2015-10-23 23:41:06
○ 2016-01-01 11:46:54
○ 2026-07-17 17:29:18
○A66.96.140.932015-04-27 → 2015-10-23 · 4 obs
● 2015-04-27 17:44:48
● 2015-10-23 23:41:06
○ 2016-01-01 11:46:54
○ 2026-07-17 17:29:18
● 2015-10-23 23:41:06
○ 2016-01-01 11:46:54
○ 2026-07-17 17:29:18
○A66.96.163.1302016-01-01 → 2016-04-19 · 4 obs
○ 2015-10-23 23:41:06
● 2016-01-01 11:46:54
● 2016-04-19 21:02:14
○ 2026-07-17 17:29:18
● 2016-01-01 11:46:54
● 2016-04-19 21:02:14
○ 2026-07-17 17:29:18
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| rtcourses.com | ns21.domaincontrol.com, ns22.domaincontrol.com | 4 records |
✅ Authoritative Response
Server:97.74.100.11
NS records: ns21.domaincontrol.com, ns22.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for rtcourses.com (unsigned zone)
⏱️ Timing
Total: 2003ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns21.domaincontrol.com, ns21.domaincontrol.com, ns22.domaincontrol.com...)