teachingopensource.org - dns.ninja
teachingopensource.org
org
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| 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=1786525454 | ||||||
Subdomains
Same first word
teachingopensource.com |
teachingopensource.net |
teachingopensource.org |
DNS History
9 records (8 active, 1 former)
●NSns1.auth.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●NSns2.auth.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●NSns3.auth.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●MXsmtp1.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●MXsmtp2.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●MXsmtp3.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
●MXsmtp4.osuosl.org2015-06-08 → 2026-08-12 · 2 obs
● 2026-08-12 09:32:10
○A140.211.15.902015-06-08 → 2017-01-09 · 4 obs
● 2017-01-09 18:53:24
○ 2020-02-24 12:19:48
○ 2026-08-12 09:32:10
●A140.211.9.532020-02-24 → 2026-08-12 · 3 obs
● 2020-02-24 12:19:48
● 2026-08-12 09:32:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b0.org.afilias-nst.org, d0.org.afilias-nst.org, b2.org.afilias-nst.org | - |
| teachingopensource.org | ns1.auth.osuosl.org, ns2.auth.osuosl.org, ns3.auth.osuosl.org | 6 records |
✅ Authoritative Response
Server:216.165.191.53
NS records: ns1.auth.osuosl.org, ns2.auth.osuosl.org, ns3.auth.osuosl.org
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for teachingopensource.org (unsigned zone)
⏱️ Timing
Total: 374ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 140.211.9.53 |
| NS | 3 | ns3.auth.osuosl.org, ns2.auth.osuosl.org... |
| MX | 4 | smtp2.osuosl.org (pri: 10), smtp3.osuosl.org (pri: 10)... |
| TXT | 1 | v=spf1 mx include:_spf.osuosl.org -all |
| SOA | 1 | ns1.auth.osuosl.org hostmaster.osuosl.or |
📌 Glue Records Collected
Total: 6
Out-of-bailiwick: 6 (ns3.auth.osuosl.org, ns2.auth.osuosl.org, ns1.auth.osuosl.org...)
Analysis
Hierarchy
teachingopensource.org serves as the parent of lists.teachingopensource.org and www.teachingopensource.org.
IP Addresses
teachingopensource.org has exactly one IP address — 140.211.9.53.
bugs.linux-foundation.org, osl.io, refspecs.linuxfoundation.org plus two other host names have IP numbers in common with teachingopensource.org.
Name Servers
teachingopensource.org is served by three name servers: ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org.
At least some of teachingopensource.org's name servers are shared with other domains, for example parrot.org, teachingopensource.net, linuxdriverproject.org and two more.
The hostnames ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org each direct to two IP addresses — ns1.auth.osuosl.org to 140.211.166.140 and 2605:bc80:3010::140, ns2.auth.osuosl.org to 140.211.166.141 and 2605:bc80:3010::141, and ns3.auth.osuosl.org to 216.165.191.53 and 2600:3402:600:24::153.
Mail Servers
Mail for teachingopensource.org is handled by four mail servers: smtp1.osuosl.org, smtp2.osuosl.org, smtp3.osuosl.org and smtp4.osuosl.org.
At least some of the mail servers used by teachingopensource.org are shared with other domains: lists.baseurl.org, lists.u-boot-project.org, buildroot.org and two others among them.
Four hostnames, each resolving to a pair of IP addresses: smtp1.osuosl.org directs to 140.211.166.138 and 2605:bc80:3010::138; smtp2.osuosl.org directs to 140.211.166.133 and 2605:bc80:3010::133; smtp3.osuosl.org directs to 140.211.166.136 and 2605:bc80:3010::136; smtp4.osuosl.org directs to 140.211.166.137 and 2605:bc80:3010::137.