`mail.critmass.com`

DNSSEC	⚠️ Not signed
A	50.93.249.91^{🇺🇸 USINTERNET50.93.248.0/21}
		PTR	`50-93-249-91.static.fttp.usinternet.com`

`critmass.com`

	DNSSEC	⚠️ Not signed
	A	3.33.130.190^{🇺🇸 Amazon3.33.128.0/20}
	A	15.197.148.33^{🇺🇸 Amazon15.197.144.0/20}
	NS	`ns57.domaincontrol.com` ⭐
	NS	`ns58.domaincontrol.com`
	MX	`mail.critmass.com` ⭐
	TXT	`v=spf1 a:mail.critmass.com mx ~all`
	SOA	`ns57.domaincontrol.com`dns@jomax.net 2025-12-09 #1

MX for

critmass.com

Same first word

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DNS History

1 record (1 active, 0 former)

●A50.93.249.912026-03-01 → 2026-03-28 · 2 obs

● 2026-03-01 16:21:48
● 2026-03-28 11:41:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
critmass.com	ns57.domaincontrol.com, ns58.domaincontrol.com	4 records

✅ Authoritative Response

Server:173.201.76.29

NS records: ns57.domaincontrol.com, ns58.domaincontrol.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for critmass.com (unsigned zone)

⏱️ Timing

Total: 96ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`50.93.249.91`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (ns57.domaincontrol.com, ns57.domaincontrol.com, ns58.domaincontrol.com...)

Analysis

Mail Server Role

mail.critmass.com handles mail for critmass.com.

IP Addresses

mail.critmass.com points to a single IP address: 50.93.249.91.

Other host names, for instance 50-93-249-91.static.fttp.usinternet.com, share IP numbers with mail.critmass.com.

mail.critmass.com - robtex.com