courseware-olim.com - robtex.com
courseware-olim.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.170.19.72🇺🇸 Amazon3.170.19.0/24 | ||||||
| PTR | server-3-170-19-72.iad61.r.cloudfront.net | ||||||
| A | 3.170.19.74🇺🇸 Amazon3.170.19.0/24 | ||||||
| A | 3.170.19.84🇺🇸 Amazon3.170.19.0/24 | ||||||
| A | 3.170.19.97🇺🇸 Amazon3.170.19.0/24 | ||||||
| NS | ns-1883.awsdns-43.co.uk ⭐ | ||||||
| A | 2600:9000:5307:5b00::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront | ||||||
| PTR | ns-1883.awsdns-43.co.uk | ||||||
| A | 205.251.199.91🇺🇸 Amazon205.251.199.0/24 prefix | ||||||
| PTR | ns-1883.awsdns-43.co.uk | ||||||
| NS | ns-1173.awsdns-18.org | ||||||
| A | 2600:9000:5304:9500::1🇺🇸 Amazon2600:9000:5304::/48 - CloudFront | ||||||
| PTR | ns-1173.awsdns-18.org | ||||||
| A | 205.251.196.149🇺🇸 Amazon205.251.196.0/24 prefix | ||||||
| PTR | ns-1173.awsdns-18.org | ||||||
| NS | ns-291.awsdns-36.com | ||||||
| A | 2600:9000:5301:2300::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront | ||||||
| PTR | ns-291.awsdns-36.com | ||||||
| A | 205.251.193.35🇺🇸 Amazon205.251.193.0/24 prefix | ||||||
| PTR | ns-291.awsdns-36.com | ||||||
| NS | ns-972.awsdns-57.net | ||||||
| A | 2600:9000:5303:cc00::1🇺🇸 Amazon2600:9000:5303::/48 - CloudFront | ||||||
| PTR | ns-972.awsdns-57.net | ||||||
| A | 205.251.195.204🇺🇸 Amazon205.251.195.0/24 prefix | ||||||
| PTR | ns-972.awsdns-57.net | ||||||
| SOA | ns-1883.awsdns-43.co.ukawsdns-hostmaster@amazon.com serial=1 | ||||||
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 | ||||||
DNS History
8 records (8 active, 0 former)
●NSns-1173.awsdns-18.org2026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●NSns-1883.awsdns-43.co.uk2026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●NSns-291.awsdns-36.com2026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●NSns-972.awsdns-57.net2026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●A3.170.19.722026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●A3.170.19.742026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●A3.170.19.842026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
●A3.170.19.972026-03-19 → 2026-03-19 · 2 obs
● 2026-03-19 07:47:40
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| courseware-olim.com | ns-291.awsdns-36.com, ns-972.awsdns-57.net, ns-1173.awsdns-18.org, ns-1883.awsdns-43.co.uk | 1 record |
✅ Authoritative Response
Server: 205.251.193.35
NS records: ns-291.awsdns-36.com, ns-972.awsdns-57.net, ns-1173.awsdns-18.org, ns-1883.awsdns-43.co.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseware-olim.com (unsigned zone)
⏱️ Timing
Total: 757ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 4 | 3.170.19.74, 3.170.19.97... |
| NS | 4 | ns-1173.awsdns-18.org, ns-1883.awsdns-43.co.uk... |
| SOA | 1 | ns-1883.awsdns-43.co.uk awsdns-hostmaste |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-291.awsdns-36.com)
Analysis
IP Addresses
Four IP numbers are pointed to by courseware-olim.com: 3.170.19.72, 3.170.19.74, 3.170.19.84 and 3.170.19.97.
other host names including www.txnpay.com, www.12seconds.tv, marvelousa.com, kyceasy.com and d3unq1hljpybmw.cloudfront.net share IP numbers with courseware-olim.com.
Name Servers
courseware-olim.com is delegated to four name servers: ns-291.awsdns-36.com, ns-972.awsdns-57.net, ns-1173.awsdns-18.org and ns-1883.awsdns-43.co.uk.
courseware-olim.com at least partially shares name servers with other domains, for instance birdie.awsapps.com, d44wwhhslhzth.cloudfront.net, danaconnect.net, aquadecor-tst.com and cjbcloud.com.
These name servers are commonly used with ns-1059.awsdns-04.org, ns-568.awsdns-07.net and ns-301.awsdns-37.com.
Host names with two IP numbers:
ns-291.awsdns-36.com points to 2600:9000:5301:2300::1 and 205.251.193.35; ns-972.awsdns-57.net points to 2600:9000:5303:cc00::1 and 205.251.195.204; ns-1173.awsdns-18.org points to 2600:9000:5304:9500::1 and 205.251.196.149; ns-1883.awsdns-43.co.uk points to 2600:9000:5307:5b00::1 and 205.251.199.91.