images.opencourse.com - robtex.com
images.opencourse.com
| CNAME | images.virt.exacttarget.com | ||||||
| CNAME | images.exacttarget.com.edgesuite.net | ||||||
| CNAME | a1889.g.akamai.net | ||||||
| DNSSEC | ⚠️ Not signed | ||||||
| A | 23.44.201.210🇺🇸 AKAMAI-ASN123.44.201.0/24 Akamai Technologies | ||||||
| PTR | a23-44-201-210.deploy.static.akamaitechnologies.com | ||||||
| A | 23.44.201.211🇺🇸 AKAMAI-ASN123.44.201.0/24 Akamai Technologies | ||||||
opencourse.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 216.206.180.119🇺🇸 AS209216.206.0.0/15 | ||||||
| NS | dns1.p02.nsone.net ⭐ | ||||||
| NS | dns1.p01.nsone.net | ||||||
| NS | dns2.p01.nsone.net | ||||||
| NS | dns3.p01.nsone.net | ||||||
| NS | dns4.p01.nsone.net | ||||||
| NS | ns05.sportsdns.net | ||||||
| NS | ns06.sportsdns.net | ||||||
| NS | ns07.sportsdns.net | ||||||
| NS | ns08.sportsdns.net | ||||||
| MX | mxa-000e8b01.gslb.pphosted.com ⭐ | ||||||
| MX | mxb-000e8b01.gslb.pphosted.com ⭐ | ||||||
| TXT | v=spf1 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~all | ||||||
| SOA | dns1.p02.nsone.nethostmaster@nsone.net serial=1657769253 | ||||||
Same first word
Similar names
DNS History
1 record (1 active, 0 former)
●CNAMEimages.virt.exacttarget.com2026-04-30 → 2026-06-15 · 2 obs
● 2026-04-30 19:20:32
● 2026-06-15 01:13:46
● 2026-06-15 01:13:46
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| opencourse.com | dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net... | - |
✅ Authoritative Response
Server:45.54.72.1
NS records: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net, ns05.sportsdns.net, ns06.sportsdns.net, ns07.sportsdns.net, ns08.sportsdns.net
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for opencourse.com (unsigned zone)
⏱️ Timing
Total: 334ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| CNAME | 1 | images.virt.exacttarget.com |
Analysis
IP Addresses
images.opencourse.com points to the IP addresses 23.44.201.210 and 23.44.201.211
Additional host names — a3905.cf.akamai.net.0.1.cn.akamaitech.net, a3561.g.akamai.net.0.1.cn.akamaitech.net, a3961.gc.akamai.net and two others — share IP numbers with images.opencourse.com.