freecourseware.com - robtex.com
freecourseware.com
| DNSSEC | ⚠️ Not signed | ||||||
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=1771291435 | ||||||
Same first word
freecourseware.com |
DNS History
21 records (0 active, 21 former)
○NSns1.namebrightdns.com2015-06-19 → 2017-01-08 · 6 obs
● 2015-06-19 16:32:50
○ 2015-11-06 03:26:34
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○ 2015-11-06 03:26:34
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○NSns2.namebrightdns.com2015-06-19 → 2017-01-08 · 3 obs
● 2015-06-19 16:32:50
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○NSnsg1.namebrightdns.com2016-04-20 → 2016-04-20 · 4 obs
○ 2016-01-26 23:07:42
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○NSnsg2.namebrightdns.com2015-11-06 → 2015-11-06 · 4 obs
○ 2015-06-19 16:32:50
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
○MXanmail.namebrightmail.com2015-06-19 → 2015-06-19 · 3 obs
● 2015-06-19 16:32:50
○ 2015-11-06 03:26:34
○ 2026-03-23 22:31:56
○ 2015-11-06 03:26:34
○ 2026-03-23 22:31:56
○MXmail1.namebrightmail.com2026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○MXmail2.namebrightmail.com2026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○A2600:1f18:4ae:c607:d1d9:565f:b122:bfdb2026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○A2600:1f18:4ae:c608:83f8:2f9c:4a61:7b6a2026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○A52.200.243.1232016-04-20 → 2016-04-20 · 4 obs
○ 2016-01-26 23:07:42
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○A52.44.244.982026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○A54.152.144.2432016-04-20 → 2016-04-20 · 4 obs
○ 2016-01-26 23:07:42
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○A54.165.131.1832026-03-23 → 2026-03-23 · 1 obs
○ 2026-03-23 22:31:56
○A54.174.31.2542015-06-19 → 2015-11-06 · 4 obs
● 2015-06-19 16:32:50
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
○A54.208.74.2152015-06-19 → 2015-11-06 · 4 obs
● 2015-06-19 16:32:50
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
● 2015-11-06 03:26:34
○ 2016-01-26 23:07:42
○ 2026-03-23 22:31:56
○A54.209.90.812016-01-26 → 2016-01-26 · 4 obs
○ 2015-11-06 03:26:34
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
○ 2026-03-23 22:31:56
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
○ 2026-03-23 22:31:56
○A54.82.156.192017-01-08 → 2017-01-08 · 3 obs
○ 2016-04-20 18:20:06
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○A54.85.54.292016-01-26 → 2016-01-26 · 4 obs
○ 2015-11-06 03:26:34
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
○ 2026-03-23 22:31:56
● 2016-01-26 23:07:42
○ 2016-04-20 18:20:06
○ 2026-03-23 22:31:56
○A54.86.225.1562017-01-08 → 2017-01-08 · 3 obs
○ 2016-04-20 18:20:06
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○CNAMEhdredirect-lb-399551664.us-east-1.elb.amazonaws.com2015-06-19 → 2016-04-20 · 4 obs
● 2015-06-19 16:32:50
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2016-04-20 18:20:06
○ 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
○CNAMEhdredirect-lb3-890977680.us-east-1.elb.amazonaws.com2017-01-08 → 2017-01-08 · 3 obs
○ 2016-04-20 18:20:06
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
● 2017-01-08 01:34:08
○ 2026-03-23 22:31:56
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
✅ Authoritative Response
Server:192.31.80.30
NS records: l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net, k.gtld-servers.net, m.gtld-servers.net, i.gtld-servers.net, g.gtld-servers.net, a.gtld-servers.net, c.gtld-servers.net, e.gtld-servers.net
🔒 DNSSEC Status
🔐 Secure (DNSSEC validated)
Chain of trust verified from root to domain
⏱️ Timing
Total: 252ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|