courseos.com - dns.ninja
courseos.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 13.248.169.48🇺🇸 Amazon13.248.160.0/20 | ||||||
| PTR | a904c694c05102f30.awsglobalaccelerator.com | ||||||
| A | 76.223.54.146🇺🇸 Amazon76.223.48.0/20 | ||||||
| NS | ns1.afternic.com ⭐ | ||||||
| A | 2603:5:2126::45🇺🇸 GODADDY-DNS2603:5:2120::/44 | ||||||
| PTR | ns1.afternic.com | ||||||
| A | 97.74.98.69🇺🇸 GODADDY-DNS97.74.98.0/23 | ||||||
| PTR | ns1.afternic.com | ||||||
| NS | ns2.afternic.com | ||||||
| A | 2603:5:2226::45🇺🇸 GODADDY-DNS2603:5:2220::/44 | ||||||
| PTR | ns2.afternic.com | ||||||
| A | 173.201.66.69🇺🇸 GODADDY-DNS173.201.66.0/23 | ||||||
| PTR | ns2.afternic.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns1.afternic.comdns@jomax.net serial=1 | ||||||
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=1785196732 | ||||||
Subdomains
mail.courseos.com |
Same first word
courseos.com |
Similar names
sosource.com |
soscuore.org |
osecours.com |
oscourse.com |
oscourse.github.io |
osources.com |
cursoseo.com |
ossource.com |
DNS History
17 records (4 active, 13 former)
○NSdns1.namecheaphosting.com2026-02-20 → 2026-02-20 · 4 obs
● 2026-02-20 13:51:36
○ 2026-02-24 23:29:16
○ 2026-07-28 00:02:50
○NSdns101.registrar-servers.com2026-02-24 → 2026-03-23 · 5 obs
● 2026-02-24 23:29:16
● 2026-03-23 20:37:44
○ 2026-04-08 19:47:54
○ 2026-07-28 00:02:50
○NSdns102.registrar-servers.com2026-02-24 → 2026-03-23 · 5 obs
● 2026-02-24 23:29:16
● 2026-03-23 20:37:44
○ 2026-04-08 19:47:54
○ 2026-07-28 00:02:50
○NSdns2.namecheaphosting.com2026-02-20 → 2026-02-20 · 4 obs
● 2026-02-20 13:51:36
○ 2026-02-24 23:29:16
○ 2026-07-28 00:02:50
●NSns1.afternic.com2026-07-04 → 2026-07-28 · 3 obs
● 2026-07-04 13:12:30
● 2026-07-28 00:02:50
○NSns1.amenworld.com2017-08-13 → 2017-08-13 · 3 obs
○ 2026-02-20 13:51:36
○ 2026-07-28 00:02:50
●NSns2.afternic.com2026-07-04 → 2026-07-28 · 3 obs
● 2026-07-04 13:12:30
● 2026-07-28 00:02:50
○NSns2.amenworld.com2017-08-13 → 2017-08-13 · 3 obs
○ 2026-02-20 13:51:36
○ 2026-07-28 00:02:50
○MXmail-fr.securemail.pro2017-08-13 → 2017-08-13 · 3 obs
○ 2026-02-20 13:51:36
○ 2026-07-28 00:02:50
○MXmail.courseos.com2026-02-20 → 2026-02-20 · 4 obs
● 2026-02-20 13:51:36
○ 2026-02-24 23:29:16
○ 2026-07-28 00:02:50
○MXmx.plingest.com2026-02-24 → 2026-03-23 · 5 obs
● 2026-02-24 23:29:16
● 2026-03-23 20:37:44
○ 2026-04-08 19:47:54
○ 2026-07-28 00:02:50
●A13.248.169.482026-07-04 → 2026-07-28 · 3 obs
● 2026-07-04 13:12:30
● 2026-07-28 00:02:50
○A172.234.24.2112026-02-24 → 2026-03-23 · 5 obs
● 2026-02-24 23:29:16
● 2026-03-23 20:37:44
○ 2026-04-08 19:47:54
○ 2026-07-28 00:02:50
○A172.239.57.1172026-02-24 → 2026-03-23 · 5 obs
● 2026-02-24 23:29:16
● 2026-03-23 20:37:44
○ 2026-04-08 19:47:54
○ 2026-07-28 00:02:50
○A198.54.125.2052026-02-20 → 2026-02-20 · 4 obs
● 2026-02-20 13:51:36
○ 2026-02-24 23:29:16
○ 2026-07-28 00:02:50
●A76.223.54.1462026-07-04 → 2026-07-28 · 3 obs
● 2026-07-04 13:12:30
● 2026-07-28 00:02:50
○A81.88.57.682017-08-13 → 2017-08-13 · 3 obs
○ 2026-02-20 13:51:36
○ 2026-07-28 00:02:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | j.gtld-servers.net, a.gtld-servers.net, g.gtld-servers.net, b.gtld-servers.net... | - |
| courseos.com | ns1.afternic.com, ns2.afternic.com | 4 records |
✅ Authoritative Response
Server:173.201.66.69
NS records: ns1.afternic.com, ns2.afternic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for courseos.com (unsigned zone)
⏱️ Timing
Total: 357ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 2 | 76.223.54.146, 13.248.169.48 |
| NS | 2 | ns1.afternic.com, ns2.afternic.com |
| MX | 1 | . (pri: 0) |
| TXT | 1 | v=spf1 -all |
| SOA | 1 | ns2.afternic.com dns.jomax.net |
📌 Glue Records Collected
Total: 4
Out-of-bailiwick: 4 (ns1.afternic.com, ns1.afternic.com, ns2.afternic.com...)
Analysis
Hierarchy
courseos.com is the parent zone for mail.courseos.com.
IP Addresses
courseos.com directs to two IP numbers, 13.248.169.48 and 76.223.54.146
tripvan.com, amendes.com, sofoundation.com plus two other host names have IP numbers in common with courseos.com.
Name Servers
courseos.com is served by two delegated name servers, ns1.afternic.com and ns2.afternic.com.
The name server configuration of courseos.com is shared with other domains, for instance internethome.com, chicagobeautyschool.com, motorhomealarms.com and two others.
courseos.com partially shares its NS delegation with several other domains, including copycatagency.com, coachcanin.com, anythink.co.uk and two others.
These name servers often co-occur with the name servers verification-yqwlayzppiicikkzjkdghq.ns101.verify.hn.
Each of the two host names carries two IP addresses: ns1.afternic.com points to 97.74.98.69 and 2603:5:2126::45, and ns2.afternic.com points to 173.201.66.69 and 2603:5:2226::45.