mail.coursemakers.com - robtex.com
mail.coursemakers.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 | 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 | ||||||
| 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 | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | ns2.afternic.comdns@jomax.net serial=1 | ||||||
coursemakers.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 185.158.133.1🇩🇪 Cloudflare185.158.133.0/24 | ||||||
| NS | barbara.ns.cloudflare.com ⭐ | ||||||
| NS | newt.ns.cloudflare.com | ||||||
| TXT | v=spf1 -all | ||||||
| SOA | barbara.ns.cloudflare.comdns@cloudflare.com serial=2411477216 | ||||||
Previously MX for
Same first word
Similar names
DNS History
7 records (4 active, 3 former)
●NSns1.afternic.com2026-02-26 → 2026-08-12 · 2 obs
● 2026-08-12 05:09:36
●NSns2.afternic.com2026-02-26 → 2026-08-12 · 2 obs
● 2026-08-12 05:09:36
○MXp.nsm.ctmail.com2016-02-25 → 2016-02-25 · 3 obs
○ 2026-02-26 17:33:42
○ 2026-08-12 05:09:36
●A13.248.169.482026-02-26 → 2026-08-12 · 3 obs
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
○A198.187.31.292015-07-02 → 2015-11-23 · 4 obs
● 2015-11-23 00:24:46
○ 2016-02-25 23:18:42
○ 2026-08-12 05:09:36
●A76.223.54.1462026-02-26 → 2026-08-12 · 3 obs
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
○A8.5.1.402016-02-25 → 2016-02-25 · 4 obs
● 2016-02-25 23:18:42
○ 2026-02-26 17:33:42
○ 2026-08-12 05:09:36
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| coursemakers.com | barbara.ns.cloudflare.com, newt.ns.cloudflare.com | 12 records |
| mail.coursemakers.com | ns1.afternic.com, ns2.afternic.com | - |
✅ Authoritative Response
Server:97.74.98.69
NS records: ns1.afternic.com, ns2.afternic.com
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for coursemakers.com (unsigned zone)
⏱️ Timing
Total: 288ms | 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 | ns1.afternic.com dns.jomax.net |
📌 Glue Records Collected
Total: 12
Out-of-bailiwick: 12 (barbara.ns.cloudflare.com, barbara.ns.cloudflare.com, barbara.ns.cloudflare.com...)
Analysis
IP Addresses
mail.coursemakers.com has two IP addresses: 13.248.169.48 and 76.223.54.146
Additional host names — server.cinetux.net, abvirtual.com, mail.agora.net and two others — share IP numbers with mail.coursemakers.com.
Name Servers
mail.coursemakers.com uses two name servers for its delegation: ns1.afternic.com and ns2.afternic.com.
mail.coursemakers.com shares its name server setup with other domains, including 60.165.com, goedc02.geggs.net, 209-128-92-144.bayarea.net and two others.
The name servers of mail.coursemakers.com overlap at least partially with those of other domains — among them dalaman.com, skfk.com, square1treatment.com and two more.
These name servers commonly appear alongside the name servers verification-ag3xtxqjhqhiyarqdrht2l.ns101.verify.hn and verification-kqnr5ht7z8pnvuelk6t645.ns101.verify.hn.
The two host names ns1.afternic.com and ns2.afternic.com each have a pair of IP addresses: ns1.afternic.com has 97.74.98.69 and 2603:5:2126::45, and ns2.afternic.com has 173.201.66.69 and 2603:5:2226::45.