teachingopensource.com - dns.ninja
teachingopensource.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 140.211.9.53🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon | ||||||
| PTR | vip-lb1.osuosl.org | ||||||
| NS | ns1.auth.osuosl.org ⭐ | ||||||
| A | 2605:bc80:3010::140🇺🇸 LINK-OREGON2605:bc80::/32 University of Oregon | ||||||
| PTR | ns1.auth.osuosl.org | ||||||
| A | 140.211.166.140🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon | ||||||
| PTR | ns1.auth.osuosl.org | ||||||
| NS | ns2.auth.osuosl.org | ||||||
| A | 2605:bc80:3010::141🇺🇸 LINK-OREGON2605:bc80::/32 University of Oregon | ||||||
| PTR | ns2.auth.osuosl.org | ||||||
| A | 140.211.166.141🇺🇸 LINK-OREGON140.211.0.0/16 University of Oregon | ||||||
| PTR | ns2.auth.osuosl.org | ||||||
| NS | ns3.auth.osuosl.org | ||||||
| A | 2600:3402:600:24::153🇺🇸 TDS-AS2600:3400::/28 TDS Telecom route object | ||||||
| PTR | ns3.auth.osuosl.org | ||||||
| A | 216.165.191.53🇺🇸 TDS-AS216.165.128.0/18 TDS Telecom | ||||||
| PTR | ns3.auth.osuosl.org | ||||||
| SOA | ns1.auth.osuosl.orghostmaster@osuosl.org 2023-03-17 #0 | ||||||
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=1786553364 | ||||||
Same first word
teachingopensource.net |
teachingopensource.org |
teachingopensource.com |
DNS History
6 records (4 active, 2 former)
●NSns1.auth.osuosl.org2015-08-20 → 2026-08-12 · 2 obs
● 2026-08-12 16:52:06
●NSns2.auth.osuosl.org2015-08-20 → 2026-08-12 · 2 obs
● 2026-08-12 16:52:06
●NSns3.auth.osuosl.org2015-08-20 → 2026-08-12 · 2 obs
● 2026-08-12 16:52:06
○MXmail.teachingopensource.org2015-08-20 → 2021-10-23 · 4 obs
● 2021-10-23 20:59:22
○ 2026-06-27 21:30:46
○ 2026-08-12 16:52:06
○A140.211.15.902015-08-20 → 2017-02-12 · 4 obs
● 2017-02-12 03:02:28
○ 2020-01-02 05:12:20
○ 2026-08-12 16:52:06
●A140.211.9.532020-01-02 → 2026-08-12 · 3 obs
● 2020-01-02 05:12:20
● 2026-08-12 16:52:06
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | i.gtld-servers.net, m.gtld-servers.net, d.gtld-servers.net, b.gtld-servers.net... | - |
| teachingopensource.com | ns1.auth.osuosl.org, ns2.auth.osuosl.org, ns3.auth.osuosl.org | - |
✅ 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.com (unsigned zone)
⏱️ Timing
Total: 461ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 140.211.9.53 |
| NS | 3 | ns1.auth.osuosl.org, ns3.auth.osuosl.org... |
| SOA | 1 | ns1.auth.osuosl.org hostmaster.osuosl.or |
Analysis
IP Addresses
teachingopensource.com points to a single IP number: 140.211.9.53.
Additional host names — lists.uclibc.org, ja-sig.org, lists.parrot.org and two others — share IP numbers with teachingopensource.com.
Name Servers
The authoritative name servers for teachingopensource.com are ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org — three in total.
teachingopensource.com partially shares its NS delegation with several other domains, including 0.1.0.3.0.8.c.b.5.0.6.2.ip6.arpa, deluge-torrent.org, uclibc.org and two others.
ns1.auth.osuosl.org, ns2.auth.osuosl.org and ns3.auth.osuosl.org all resolve to exactly two IP numbers apiece: ns1.auth.osuosl.org → 140.211.166.140 and 2605:bc80:3010::140; ns2.auth.osuosl.org → 140.211.166.141 and 2605:bc80:3010::141; ns3.auth.osuosl.org → 216.165.191.53 and 2600:3402:600:24::153.