coursefiles.linuxcourseware.com - robtex.com
coursefiles.linuxcourseware.com
| CNAME | coursefiles.linuxcourseware.com.s3.us-east-2.amazonaws.com | ||||||
| CNAME | s3-r-w.us-east-2.amazonaws.com | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.5.89.51 | ||||||
| A | 3.5.92.36 | ||||||
| A | 3.5.92.123 | ||||||
| A | 3.5.128.11 | ||||||
| A | 3.5.133.117 | ||||||
| A | 3.5.133.207 | ||||||
| A | 3.5.133.223 | ||||||
| A | 52.219.110.250 | ||||||
| NS | ns-90.awsdns-11.com ⭐ | ||||||
| NS | ns-1009.awsdns-62.net | ||||||
| NS | ns-1428.awsdns-50.org | ||||||
| NS | ns-1974.awsdns-54.co.uk | ||||||
| TXT | ec885c714863bb56f6d00b64275f2784 | ||||||
| SOA | ns-90.awsdns-11.comawsdns-hostmaster@amazon.com serial=1 | ||||||
linuxcourseware.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 50.115.18.84🇺🇸 AS5386150.115.16.0/21 KGIX | ||||||
| NS | ns1.kualo.net ⭐ | ||||||
| NS | ns2.kualo.net | ||||||
| NS | ns3.kualo.net | ||||||
| NS | ns4.kualo.net | ||||||
| MX | linuxcourseware.com ⭐ | ||||||
| TXT | google-site-verification=B4IwzftMcfE4Jkcj5R-ERPYli7ONl_LiEG1f_hajZdE +ip4:75.... | ||||||
| TXT | v=spf1 ip4:50.115.18.80 include:spf.filteredmx.net +a +mx a mx include:relay.... | ||||||
| TXT | mailerlite-domain-verification=52c5a228aa84da61c9207960dc39b99368469bcf | ||||||
| TXT | google-site-verification=0xQMxcPkUHZvw3DrwmmvLl2I-UQg3lMAg-mSgL6NJ-A +ip4:75.... | ||||||
| SOA | ns1.kualo.netserver_alerts_inbound@kgix.com 2026-03-06 #1 | ||||||
Similar names
DNS History
1 record (1 active, 0 former)
●CNAMEcoursefiles.linuxcourseware.com.s3.us-east-2.amazonaws.com2026-03-05 → 2026-03-07 · 2 obs
● 2026-03-05 21:25:38
● 2026-03-07 19:05:16
● 2026-03-07 19:05:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | c.gtld-servers.net, h.gtld-servers.net, l.gtld-servers.net, f.gtld-servers.net... | - |
| linuxcourseware.com | ns1.kualo.net, ns2.kualo.net, ns3.kualo.net, ns4.kualo.net | - |
✅ Authoritative Response
Server: 162.159.26.153
NS records: ns1.kualo.net, ns2.kualo.net, ns3.kualo.net, ns4.kualo.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for linuxcourseware.com (unsigned zone)
⏱️ Timing
Total: 1801ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | coursefiles.linuxcourseware.com.s3.us-ea |
Analysis
IP Addresses
Eight IP numbers are pointed to by coursefiles.linuxcourseware.com: 3.5.89.51, 3.5.92.36, 3.5.92.123, 3.5.128.11, 3.5.133.117, 3.5.133.207, 3.5.133.223 and 52.219.110.250.
Name Servers
coursefiles.linuxcourseware.com is delegated to four name servers: ns-90.awsdns-11.com, ns-1009.awsdns-62.net, ns-1428.awsdns-50.org and ns-1974.awsdns-54.co.uk.