instructus.org - dns.ninja
instructus.org
| DNSSEC | ⚠️ Not signed | ||||||
| A | 35.214.120.83🇬🇧 Google35.214.0.0/17 | ||||||
| PTR | 83.120.214.35.bc.googleusercontent.com | ||||||
| NS | ns55.domaincontrol.com ⭐ | ||||||
| A | 2603:5:21b2::1c🇺🇸 GODADDY-DNS2603:5:21b0::/44 | ||||||
| PTR | ns55.domaincontrol.com | ||||||
| A | 97.74.107.28🇺🇸 GODADDY-DNS97.74.106.0/23 | ||||||
| PTR | ns55.domaincontrol.com | ||||||
| NS | ns56.domaincontrol.com | ||||||
| A | 2603:5:22b2::1c🇺🇸 GODADDY-DNS2603:5:22b0::/44 | ||||||
| PTR | ns56.domaincontrol.com | ||||||
| A | 173.201.75.28🇺🇸 GODADDY-DNS173.201.74.0/23 | ||||||
| PTR | ns56.domaincontrol.com | ||||||
| MX | mx1.pcs-systems.com ⭐ | ||||||
| A | 35.178.20.19🇬🇧 Amazon35.178.0.0/15 EC2 LHR prefix | ||||||
| PTR | mx1.pcs-systems.com | ||||||
| MX | mx2.pcs-systems.com ⭐ | ||||||
| A | 35.177.209.36🇬🇧 Amazon35.176.0.0/15 EC2 LHR prefix | ||||||
| PTR | mx2.pcs-systems.com | ||||||
| TXT | v=spf1 a mx ip4:64.78.151.128/26 ip4:216.241.183.0/24 ip4:82.197.78.69/32 ip4... | ||||||
| TXT | google-site-verification=Bs54i2ZUMqd7VQ9wK54IN6PP2iEM-b_qSi0KzW0SfFo | ||||||
| SOA | ns55.domaincontrol.comdns@jomax.net 2026-06-23 #1 | ||||||
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=1782897984 | ||||||
Subdomains
mail.instructus.org |
www.instructus.org |
elearning.instructus.org |
Same first word
instructus.hu |
instructus.org |
instructus.com |
Similar names
DNS History
13 records (5 active, 8 former)
○NSdns01.opal-solutions.com2015-08-16 → 2017-03-26 · 4 obs
● 2017-03-26 16:32:16
○ 2020-03-20 01:57:02
○ 2026-07-01 09:47:26
○NSdns02.opal-solutions.com2015-08-16 → 2017-03-26 · 4 obs
● 2017-03-26 16:32:16
○ 2020-03-20 01:57:02
○ 2026-07-01 09:47:26
○NSdns03.opal-solutions.com2015-08-16 → 2017-03-26 · 4 obs
● 2017-03-26 16:32:16
○ 2020-03-20 01:57:02
○ 2026-07-01 09:47:26
○NSns.123-reg.co.uk2020-03-20 → 2020-03-20 · 4 obs
● 2020-03-20 01:57:02
○ 2026-02-15 10:44:14
○ 2026-07-01 09:47:26
○NSns2.123-reg.co.uk2020-03-20 → 2020-03-20 · 4 obs
● 2020-03-20 01:57:02
○ 2026-02-15 10:44:14
○ 2026-07-01 09:47:26
●NSns55.domaincontrol.com2026-02-15 → 2026-07-01 · 3 obs
● 2026-02-15 10:44:14
● 2026-07-01 09:47:26
●NSns56.domaincontrol.com2026-02-15 → 2026-07-01 · 3 obs
● 2026-02-15 10:44:14
● 2026-07-01 09:47:26
○MXinstructus-org.mail.protection.outlook.com2015-08-16 → 2017-03-26 · 4 obs
● 2017-03-26 16:32:16
○ 2020-03-20 01:57:02
○ 2026-07-01 09:47:26
●MXmx1.pcs-systems.com2020-03-20 → 2026-07-01 · 3 obs
● 2020-03-20 01:57:02
● 2026-07-01 09:47:26
●MXmx2.pcs-systems.com2020-03-20 → 2026-07-01 · 3 obs
● 2020-03-20 01:57:02
● 2026-07-01 09:47:26
○A109.203.112.692015-08-16 → 2017-03-26 · 4 obs
● 2017-03-26 16:32:16
○ 2020-03-20 01:57:02
○ 2026-07-01 09:47:26
●A35.214.120.832026-02-15 → 2026-07-01 · 3 obs
● 2026-02-15 10:44:14
● 2026-07-01 09:47:26
○A77.104.173.1572020-03-20 → 2020-03-20 · 4 obs
● 2020-03-20 01:57:02
○ 2026-02-15 10:44:14
○ 2026-07-01 09:47:26
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| org | b2.org.afilias-nst.org, b0.org.afilias-nst.org, d0.org.afilias-nst.org | - |
| instructus.org | ns56.domaincontrol.com, ns55.domaincontrol.com | - |
✅ Authoritative Response
Server:97.74.107.28
NS records: ns56.domaincontrol.com, ns55.domaincontrol.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for instructus.org (unsigned zone)
⏱️ Timing
Total: 350ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 35.214.120.83 |
| NS | 2 | ns55.domaincontrol.com, ns56.domaincontrol.com |
| MX | 2 | mx2.pcs-systems.com (pri: 10), mx1.pcs-systems.com (pri: 10) |
| TXT | 2 | v=spf1 a mx ip4:64.78.151.128/26 ip4:216, google-site-verification=Bs54i2ZUMqd7VQ9 |
| SOA | 1 | ns55.domaincontrol.com dns.jomax.net |
Analysis
Hierarchy
mail.instructus.org, www.instructus.org and elearning.instructus.org each fall under the parent domain instructus.org.
IP Addresses
instructus.org resolves to just one IP address, 35.214.120.83.
Two other host names, along with rcsa.org.uk, thevendingpeople.co.uk and 83.120.214.35.bc.googleusercontent.com, also share IP numbers with instructus.org.
Name Servers
instructus.org uses two name servers for its delegation: ns55.domaincontrol.com and ns56.domaincontrol.com.
instructus.org shares its NS records with other domains, for example michaelhcox.net, vascabianca.com, berkshiretoys.net and two others.
The two host names ns55.domaincontrol.com and ns56.domaincontrol.com each have a pair of IP addresses: ns55.domaincontrol.com has 97.74.107.28 and 2603:5:21b2::1c, and ns56.domaincontrol.com has 173.201.75.28 and 2603:5:22b2::1c.
Mail Servers
instructus.org is served by two mail servers, mx1.pcs-systems.com and mx2.pcs-systems.com.
Among the domains sharing a mail server setup with instructus.org are pcs-systems.co.uk, bheta.co.uk, spearmark.co.uk and two others.
instructus.org partially shares its mail servers with other domains, i-gateway.co.uk and magrath.sg being examples.
mx1.pcs-systems.com resolves to 35.178.20.19. mx2.pcs-systems.com resolves to 35.177.209.36. Both host names point to a single IP number.