mail.coursemakers.com - robtex.com

mail.coursemakers.com

coursemakers.com

DNSSEC⚠️ Not signed
A185.158.133.1🇩🇪 Cloudflare185.158.133.0/24
NSbarbara.ns.cloudflare.com
NSnewt.ns.cloudflare.com
TXTv=spf1 -all
SOAbarbara.ns.cloudflare.comdns@cloudflare.com serial=2411477216

Previously MX for

Same first word

Similar names

DNS History

7 records (4 active, 3 former)

20162017201820192020202120222023202420252026NSns1.afternic.comns2.afternic.comMXp.nsm.ctmail.comA13.248.169.4876.223.54.146198.187.31.298.5.1.40
NSns1.afternic.com2026-02-26 → 2026-08-12 · 2 obs
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
NSns2.afternic.com2026-02-26 → 2026-08-12 · 2 obs
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
MXp.nsm.ctmail.com2016-02-25 → 2016-02-25 · 3 obs
● 2016-02-25 23:18:42
○ 2026-02-26 17:33:42
○ 2026-08-12 05:09:36
A13.248.169.482026-02-26 → 2026-08-12 · 3 obs
○ 2016-02-25 23:18:42
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
A198.187.31.292015-07-02 → 2015-11-23 · 4 obs
● 2015-07-02 02:33:40
● 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
○ 2016-02-25 23:18:42
● 2026-02-26 17:33:42
● 2026-08-12 05:09:36
A8.5.1.402016-02-25 → 2016-02-25 · 4 obs
○ 2015-11-23 00:24:46
● 2016-02-25 23:18:42
○ 2026-02-26 17:33:42
○ 2026-08-12 05:09:36

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
coursemakers.combarbara.ns.cloudflare.com, newt.ns.cloudflare.com12 records
mail.coursemakers.comns1.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

TypeCountSample Data
A276.223.54.146, 13.248.169.48
NS2ns1.afternic.com, ns2.afternic.com
MX1. (pri: 0)
TXT1v=spf1 -all
SOA1ns1.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.