`mail.realworldmath.com`

	CNAME	`pop.secureserver.net`
	DNSSEC	⚠️ Not signed

`realworldmath.com`

	DNSSEC	⚠️ Not signed
	A	3.33.251.168^{🇺🇸 Amazon3.33.240.0/20}
	A	15.197.225.128^{🇺🇸 Amazon15.197.224.0/20}
	NS	`ns65.domaincontrol.com` ⭐
	NS	`ns66.domaincontrol.com`
	MX	`smtp.secureserver.net` ⭐
	MX	`mailstore1.secureserver.net`⁽¹⁰⁾
	SOA	`ns65.domaincontrol.com`dns@jomax.net 2026-01-30 #3

WOT: SAFE (62/100)
WOT: SAFE (69/100)

Previously MX for

realworldmath.com

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DNS History

8 records (1 active, 7 former)

○A173.201.192.1992015-12-20 → 2016-03-19 · 5 obs

○ 2015-10-17 10:51:08
● 2015-12-20 01:14:06
● 2016-03-19 23:23:52
○ 2016-07-17 07:14:42
○ 2026-04-24 08:18:42

○A173.201.193.1992015-05-18 → 2015-05-18 · 2 obs

● 2015-05-18 19:36:24
○ 2026-04-24 08:18:42

○A68.178.252.1152015-05-18 → 2015-05-18 · 2 obs

● 2015-05-18 19:36:24
○ 2026-04-24 08:18:42

○A68.178.252.2222015-05-18 → 2015-05-18 · 2 obs

● 2015-05-18 19:36:24
○ 2026-04-24 08:18:42

○A72.167.218.1922016-07-17 → 2016-07-17 · 3 obs

○ 2016-03-19 23:23:52
● 2016-07-17 07:14:42
○ 2026-04-24 08:18:42

○A97.74.135.2182015-05-18 → 2015-10-17 · 4 obs

● 2015-05-18 19:36:24
● 2015-10-17 10:51:08
○ 2015-12-20 01:14:06
○ 2026-04-24 08:18:42

●CNAMEpop.secureserver.net2015-05-18 → 2026-04-24 · 2 obs

● 2015-05-18 19:36:24
● 2026-04-24 08:18:42

○CNAMEpop.where.secureserver.net2015-10-17 → 2016-07-17 · 4 obs

○ 2015-05-18 19:36:24
● 2015-10-17 10:51:08
● 2016-07-17 07:14:42
○ 2026-04-24 08:18:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, m.gtld-servers.net, c.gtld-servers.net, g.gtld-servers.net...	-
realworldmath.com	ns66.domaincontrol.com, ns65.domaincontrol.com	4 records

✅ Authoritative Response

Server:97.74.102.43

NS records: ns66.domaincontrol.com, ns65.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for realworldmath.com (unsigned zone)

⏱️ Timing

Total: 291ms | Queries: -

📄 Records

Type	Count	Sample Data
CNAME	1	`pop.secureserver.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns66.domaincontrol.com, ns66.domaincontrol.com, ns65.domaincontrol.com...)

mail.realworldmath.com - robtex.com