courselets.org - dns.ninja
courselets.org
org
| DNSSEC | ⚠️ Not signed | ||||||
| NS | a0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation | ||||||
| NS | a2.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | b0.org.afilias-nst.org | ||||||
| NS | b2.org.afilias-nst.org | ||||||
| NS | c0.org.afilias-nst.info ⚠️ Not in parent delegation | ||||||
| NS | d0.org.afilias-nst.org | ||||||
| SOA | a0.org.afilias-nst.infohostmaster@donuts.email serial=1785027349 | ||||||
Same first word
courselets.org |
courselets.de |
courselets.com |
Similar names
DNS History
16 records (6 active, 10 former)
○NSewald.mbi.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
●NSns-1207.awsdns-22.org2015-11-26 → 2026-07-26 · 3 obs
● 2015-11-26 13:48:02
● 2026-07-26 01:35:16
●NSns-1810.awsdns-34.co.uk2015-11-26 → 2026-07-26 · 3 obs
● 2015-11-26 13:48:02
● 2026-07-26 01:35:16
●NSns-8.awsdns-01.com2015-11-26 → 2026-07-26 · 3 obs
● 2015-11-26 13:48:02
● 2026-07-26 01:35:16
●NSns-903.awsdns-48.net2015-11-26 → 2026-07-26 · 3 obs
● 2015-11-26 13:48:02
● 2026-07-26 01:35:16
○NSns1.dns.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○NSns2.dns.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○NSns3.dns.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○NSpaz.mbi.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○NSroentgen.mbi.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
●MXinbound-smtp.us-west-2.amazonaws.com2026-03-31 → 2026-07-26 · 3 obs
● 2026-03-31 10:13:38
● 2026-07-26 01:35:16
○MXshannon-1.mbi.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○MXshannon-2.mbi.ucla.edu2015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
○A128.97.39.182015-08-09 → 2015-08-09 · 3 obs
○ 2015-11-26 13:48:02
○ 2026-07-26 01:35:16
●A142.44.213.942026-03-31 → 2026-07-26 · 3 obs
● 2026-03-31 10:13:38
● 2026-07-26 01:35:16
○A52.89.21.392015-11-26 → 2017-05-03 · 5 obs
● 2015-11-26 13:48:02
● 2017-05-03 18:01:48
○ 2026-03-31 10:13:38
○ 2026-07-26 01:35:16
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, d0.org.afilias-nst.org, b0.org.afilias-nst.org | - |
| courselets.org | ns-903.awsdns-48.net, ns-1810.awsdns-34.co.uk, ns-8.awsdns-01.com, ns-1207.awsdns-22.org | 2 records |
✅ Authoritative Response
Server:205.251.196.183
NS records: ns-903.awsdns-48.net, ns-1810.awsdns-34.co.uk, ns-8.awsdns-01.com, ns-1207.awsdns-22.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courselets.org (unsigned zone)
⏱️ Timing
Total: 232ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 142.44.213.94 |
| NS | 4 | ns-1207.awsdns-22.org, ns-1810.awsdns-34.co.uk... |
| MX | 1 | inbound-smtp.us-west-2.amazonaws.com (pr |
| SOA | 1 | ns-1810.awsdns-34.co.uk awsdns-hostmaste |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (ns-1207.awsdns-22.org, ns-1207.awsdns-22.org)
Analysis
IP Addresses
courselets.org resolves to one IP address: 142.44.213.94.
There are other host names — ns554182.ip-142-44-213.net among them — that share IP numbers with courselets.org.
Name Servers
The authoritative name servers for courselets.org are ns-8.awsdns-01.com, ns-903.awsdns-48.net, ns-1207.awsdns-22.org and ns-1810.awsdns-34.co.uk.
courselets.org has at least partial name server overlap with other domains, such as waltons-florist.com, kclient-staging.com, bathmateproducts.com and two others.
ns-8.awsdns-01.com, ns-903.awsdns-48.net, ns-1207.awsdns-22.org and ns-1810.awsdns-34.co.uk all point to exactly two IP numbers each: ns-8.awsdns-01.com → 205.251.192.8 and 2600:9000:5300:800::1; ns-903.awsdns-48.net → 205.251.195.135 and 2600:9000:5303:8700::1; ns-1207.awsdns-22.org → 205.251.196.183 and 2600:9000:5304:b700::1; ns-1810.awsdns-34.co.uk → 205.251.199.18 and 2600:9000:5307:1200::1.
Mail Servers
Mail for courselets.org is handled by a single mail server, inbound-smtp.us-west-2.amazonaws.com.
courselets.org uses an identical mail server configuration to several other domains — among them etrat.training, etext.co.nz, okeanides.net and two more.
courselets.org has at least partial mail server overlap with other domains such as captiveaire.atlassian.net, brita.co.jp, valmontutilities.atlassian.net and two more.
This set of mail servers commonly appears together with the mail servers inbound-smtp.us-east-1.amazonaws.com.
inbound-smtp.us-west-2.amazonaws.com has four IP addresses: 35.161.157.106, 52.13.163.116, 52.43.162.244 and 54.188.121.70.