coursesmith.net - robtex.com
coursesmith.net
| DNSSEC | ⚠️ Not signed | ||||||
| A | 3.171.76.79🇺🇸 Amazon3.171.76.0/23 | ||||||
| PTR | server-3-171-76-79.iad89.r.cloudfront.net | ||||||
| A | 3.171.76.86🇺🇸 Amazon3.171.76.0/23 | ||||||
| A | 3.171.76.90🇺🇸 Amazon3.171.76.0/23 | ||||||
| A | 3.171.76.95🇺🇸 Amazon3.171.76.0/23 | ||||||
| NS | ns-319.awsdns-39.com ⭐ | ||||||
| A | 2600:9000:5301:3f00::1🇺🇸 Amazon2600:9000:5301::/48 - CloudFront | ||||||
| PTR | ns-319.awsdns-39.com | ||||||
| A | 205.251.193.63🇺🇸 Amazon205.251.193.0/24 prefix | ||||||
| PTR | ns-319.awsdns-39.com | ||||||
| NS | ns-1376.awsdns-44.org | ||||||
| A | 2600:9000:5305:6000::1🇺🇸 Amazon2600:9000:5305::/48 - CloudFront | ||||||
| PTR | ns-1376.awsdns-44.org | ||||||
| A | 205.251.197.96🇺🇸 Amazon205.251.197.0/24 prefix | ||||||
| PTR | ns-1376.awsdns-44.org | ||||||
| NS | ns-1860.awsdns-40.co.uk | ||||||
| A | 2600:9000:5307:4400::1🇺🇸 Amazon2600:9000:5307::/48 - CloudFront | ||||||
| PTR | ns-1860.awsdns-40.co.uk | ||||||
| A | 205.251.199.68🇺🇸 Amazon205.251.199.0/24 prefix | ||||||
| PTR | ns-1860.awsdns-40.co.uk | ||||||
| NS | ns-718.awsdns-25.net | ||||||
| A | 2600:9000:5302:ce00::1🇺🇸 Amazon2600:9000:5302::/48 - CloudFront | ||||||
| PTR | ns-718.awsdns-25.net | ||||||
| A | 205.251.194.206🇺🇸 Amazon205.251.194.0/24 prefix | ||||||
| PTR | ns-718.awsdns-25.net | ||||||
| SOA | ns-319.awsdns-39.comawsdns-hostmaster@amazon.com serial=1 | ||||||
net
| 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=1771291465 | ||||||
Subdomains
Same first word
coursesmith.net |
coursesmith.com |
Similar names
DNS History
16 records (8 active, 8 former)
●NSns-1376.awsdns-44.org2026-02-15 → 2026-03-12 · 2 obs
● 2026-03-12 03:43:54
●NSns-1860.awsdns-40.co.uk2026-02-15 → 2026-03-12 · 2 obs
● 2026-03-12 03:43:54
●NSns-319.awsdns-39.com2026-02-15 → 2026-03-12 · 2 obs
● 2026-03-12 03:43:54
●NSns-718.awsdns-25.net2026-02-15 → 2026-03-12 · 2 obs
● 2026-03-12 03:43:54
○A3.170.19.282026-03-10 → 2026-03-10 · 4 obs
● 2026-03-10 11:25:48
○ 2026-03-11 04:08:22
○ 2026-03-12 03:43:54
○A3.170.19.842026-03-10 → 2026-03-10 · 4 obs
● 2026-03-10 11:25:48
○ 2026-03-11 04:08:22
○ 2026-03-12 03:43:54
○A3.170.19.982026-03-10 → 2026-03-10 · 4 obs
● 2026-03-10 11:25:48
○ 2026-03-11 04:08:22
○ 2026-03-12 03:43:54
○A3.170.19.992026-03-10 → 2026-03-10 · 4 obs
● 2026-03-10 11:25:48
○ 2026-03-11 04:08:22
○ 2026-03-12 03:43:54
●A3.171.76.792026-02-15 → 2026-03-12 · 6 obs
● 2026-03-09 18:39:58
○ 2026-03-10 11:25:48
○ 2026-03-12 01:38:54
● 2026-03-12 03:43:52
● 2026-03-12 03:43:54
●A3.171.76.862026-02-15 → 2026-03-12 · 6 obs
● 2026-03-09 18:39:58
○ 2026-03-10 11:25:48
○ 2026-03-12 01:38:54
● 2026-03-12 03:43:52
● 2026-03-12 03:43:54
●A3.171.76.902026-02-15 → 2026-03-12 · 6 obs
● 2026-03-09 18:39:58
○ 2026-03-10 11:25:48
○ 2026-03-12 01:38:54
● 2026-03-12 03:43:52
● 2026-03-12 03:43:54
●A3.171.76.952026-02-15 → 2026-03-12 · 6 obs
● 2026-03-09 18:39:58
○ 2026-03-10 11:25:48
○ 2026-03-12 01:38:54
● 2026-03-12 03:43:52
● 2026-03-12 03:43:54
○A52.222.177.1202026-03-11 → 2026-03-12 · 5 obs
● 2026-03-11 04:08:22
● 2026-03-12 01:38:54
○ 2026-03-12 03:43:52
○ 2026-03-12 03:43:54
○A52.222.177.702026-03-11 → 2026-03-12 · 5 obs
● 2026-03-11 04:08:22
● 2026-03-12 01:38:54
○ 2026-03-12 03:43:52
○ 2026-03-12 03:43:54
○A52.222.177.712026-03-11 → 2026-03-12 · 5 obs
● 2026-03-11 04:08:22
● 2026-03-12 01:38:54
○ 2026-03-12 03:43:52
○ 2026-03-12 03:43:54
○A52.222.177.922026-03-11 → 2026-03-12 · 5 obs
● 2026-03-11 04:08:22
● 2026-03-12 01:38:54
○ 2026-03-12 03:43:52
○ 2026-03-12 03:43:54
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | m.gtld-servers.net, k.gtld-servers.net, b.gtld-servers.net, f.gtld-servers.net... | - |
| coursesmith.net | ns-718.awsdns-25.net, ns-319.awsdns-39.com, ns-1860.awsdns-40.co.uk, ns-1376.awsdns-44.org | 1 record |
✅ Authoritative Response
Server: 205.251.194.206
NS records: ns-718.awsdns-25.net, ns-319.awsdns-39.com, ns-1860.awsdns-40.co.uk, ns-1376.awsdns-44.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursesmith.net (unsigned zone)
⏱️ Timing
Total: 650ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 4 | 3.171.76.86, 3.171.76.79... |
| NS | 4 | ns-1376.awsdns-44.org, ns-1860.awsdns-40.co.uk... |
| SOA | 1 | ns-319.awsdns-39.com awsdns-hostmaster.a |
📌 Glue Records Collected
Total: 1
Out-of-bailiwick: 1 (ns-718.awsdns-25.net)
Analysis
Hierarchy
coursesmith.net is the parent of craft.coursesmith.net and www.coursesmith.net.
IP Addresses
coursesmith.net maps to four IP numbers: 3.171.76.79, 3.171.76.86, 3.171.76.90 and 3.171.76.95.
other host names include www.thailandvisa.net, openap.tv, duq5v7gtsc6fw.cloudfront.net, www.afrotc.com and nishida.awsapps.com; they share IP numbers with coursesmith.net.
Name Servers
coursesmith.net delegates to four name servers: ns-319.awsdns-39.com, ns-718.awsdns-25.net, ns-1376.awsdns-44.org and ns-1860.awsdns-40.co.uk.
coursesmith.net at least partially shares name servers with other domains, for instance 8.198.99.in-addr.arpa, estherscoffee.com, mtn-sdp-frontend-dev.stellar.org, adsfrauddetector.com and axialistas.com.
These name servers are commonly used alongside ns-1428.awsdns-50.org.
Host names with two IP numbers: ns-319.awsdns-39.com points to 2600:9000:5301:3f00::1 and 205.251.193.63; ns-718.awsdns-25.net points to 2600:9000:5302:ce00::1 and 205.251.194.206; ns-1376.awsdns-44.org points to 2600:9000:5305:6000::1 and 205.251.197.96; ns-1860.awsdns-40.co.uk points to 2600:9000:5307:4400::1 and 205.251.199.68.