opencourseware.org - dns.ninja
opencourseware.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 104.143.9.210🇺🇸 THEPRODUCERS104.143.9.0/24 The Producers, Inc. Equinix NY4 | ||||||
| A | 104.143.9.211🇺🇸 THEPRODUCERS104.143.9.0/24 The Producers, Inc. Equinix NY4 | ||||||
| NS | ns0.directnic.com ⭐ | ||||||
| A | 2602:fc8e:0:688f:9::41🇺🇸 THEPRODUCERS2602:fc8e::/40 The Producers, Inc. Equinix NY4 | ||||||
| A | 104.143.9.41🇺🇸 THEPRODUCERS104.143.9.0/24 The Producers, Inc. Equinix NY4 | ||||||
| NS | ns1.directnic.com | ||||||
| A | 2600:3c01::f03c:94ff:fe81:e767🇺🇸 AKAMAI-LINODE-AP2600:3c01::/32 Akamai Technologies | ||||||
| A | 23.239.4.33🇺🇸 AKAMAI-LINODE-AP23.239.0.0/21 Akamai Technologies | ||||||
| PTR | dnic-ns1.directnic.net | ||||||
| NS | ns2.directnic.com | ||||||
| A | 2602:fc8e:0:688f:9::42🇺🇸 THEPRODUCERS2602:fc8e::/40 The Producers, Inc. Equinix NY4 | ||||||
| A | 104.143.9.42🇺🇸 THEPRODUCERS104.143.9.0/24 The Producers, Inc. Equinix NY4 | ||||||
| NS | ns3.directnic.com | ||||||
| A | 2600:3c00::f03c:94ff:fe81:b947🇺🇸 AKAMAI-LINODE-AP2600:3c00::/32 Akamai Technologies | ||||||
| A | 45.33.11.85🇺🇸 AKAMAI-LINODE-AP45.33.0.0/19 Akamai Technologies | ||||||
| PTR | dnic-ns3.directnic.net | ||||||
| SOA | ns0.directnic.comhostmaster@ns0.directnic.com 2018-02-06 #12 | ||||||
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=1782880817 | ||||||
Same first word
opencourseware.me |
opencourseware.online |
opencourseware.org |
opencourseware.net |
opencourseware.eu |
opencourseware.com |
opencourseware.co.uk |
opencourseware.de |
Similar names
DNS History
10 records (6 active, 4 former)
●NSns0.directnic.com2021-10-25 → 2026-07-01 · 3 obs
● 2021-10-25 15:37:48
● 2026-07-01 05:03:04
●NSns1.directnic.com2021-10-25 → 2026-07-01 · 3 obs
● 2021-10-25 15:37:48
● 2026-07-01 05:03:04
○NSns1.sjdjweis.com2015-08-01 → 2017-01-01 · 4 obs
● 2017-01-01 18:40:00
○ 2021-10-25 15:37:48
○ 2026-07-01 05:03:04
●NSns2.directnic.com2026-04-07 → 2026-07-01 · 3 obs
● 2026-04-07 19:25:20
● 2026-07-01 05:03:04
○NSns2.sjdjweis.com2015-08-01 → 2017-01-01 · 4 obs
● 2017-01-01 18:40:00
○ 2021-10-25 15:37:48
○ 2026-07-01 05:03:04
●NSns3.directnic.com2026-04-07 → 2026-07-01 · 3 obs
● 2026-04-07 19:25:20
● 2026-07-01 05:03:04
○MXmail.opencourseware.org2015-08-01 → 2017-01-01 · 4 obs
● 2017-01-01 18:40:00
○ 2021-10-25 15:37:48
○ 2026-07-01 05:03:04
●A104.143.9.2102021-10-25 → 2026-07-01 · 3 obs
● 2021-10-25 15:37:48
● 2026-07-01 05:03:04
●A104.143.9.2112021-10-25 → 2026-07-01 · 3 obs
● 2021-10-25 15:37:48
● 2026-07-01 05:03:04
○A209.234.75.1302015-08-01 → 2017-01-01 · 4 obs
● 2017-01-01 18:40:00
○ 2021-10-25 15:37:48
○ 2026-07-01 05:03:04
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | d0.org.afilias-nst.org, b0.org.afilias-nst.org, b2.org.afilias-nst.org | - |
| opencourseware.org | ns1.directnic.com, ns0.directnic.com, ns3.directnic.com, ns2.directnic.com | - |
✅ Authoritative Response
Server:45.33.11.85
NS records: ns1.directnic.com, ns0.directnic.com, ns3.directnic.com, ns2.directnic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for opencourseware.org (unsigned zone)
⏱️ Timing
Total: 490ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 104.143.9.211, 104.143.9.210 |
| NS | 4 | ns3.directnic.com, ns2.directnic.com... |
| SOA | 1 | ns0.directnic.com hostmaster.ns0.directn |
Analysis
IP Addresses
opencourseware.org points to the IP addresses 104.143.9.210 and 104.143.9.211
Additional host names — grandbowl.com, mail.ccur.es, (0x63756e74)s.org and two others — share IP numbers with opencourseware.org.
Name Servers
opencourseware.org has four authoritative name servers: ns0.directnic.com, ns1.directnic.com, ns2.directnic.com and ns3.directnic.com.
There is at least partial name server overlap between opencourseware.org and other domains — finiware.com, glutenfreekidgifts.com, eicub.net and two more among them.
All four hostnames — ns0.directnic.com, ns1.directnic.com, ns2.directnic.com and ns3.directnic.com — resolve to two IP numbers apiece: ns0.directnic.com to 104.143.9.41 and 2602:fc8e:0:688f:9::41; ns1.directnic.com to 23.239.4.33 and 2600:3c01::f03c:94ff:fe81:e767; ns2.directnic.com to 104.143.9.42 and 2602:fc8e:0:688f:9::42; ns3.directnic.com to 45.33.11.85 and 2600:3c00::f03c:94ff:fe81:b947.