`mail.linuxcolumbus.com`

DNSSEC	⚠️ Not signed
A	76.10.194.87^{🇺🇸 BLUEMILE76.10.192.0/20}
		PTR	`mail.linuxcolumbus.com`
		PTR	`mail.n8vw.com`
		PTR	`emailservices.userfriendlyis.com`
		PTR	`mail.allanholdsworth.net`
TXT	`v=spf1 a -all`

`linuxcolumbus.com`

	DNSSEC	⚠️ Not signed
	A	76.10.194.75^{🇺🇸 BLUEMILE76.10.192.0/20}
	NS	`ns4.linuxcolumbus.com` ⭐
	NS	`ns2.linuxcolumbus.com`
	MX	`mail.linuxcolumbus.com` ⭐
	TXT	`v=spf1 ip4:76.10.194.64/27 a mx ptr ~all`
	SOA	`ns4.linuxcolumbus.com`hostmaster@linuxcolumbus.com serial=1338930226

PTR for

87.194.10.76.in-addr.arpa

MX for

linuxcolumbus.com

Same first word

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DNS History

3 records (1 active, 2 former)

○A76.10.194.702007-08-15 → 2007-08-15 · 3 obs

● 2007-08-15 22:56:42
○ 2015-06-02 23:01:30
○ 2026-03-25 23:23:38

○A76.10.194.802015-06-02 → 2016-05-08 · 5 obs

○ 2007-08-15 22:56:42
● 2015-06-02 23:01:30
● 2016-05-08 21:35:44
○ 2026-02-16 02:51:46
○ 2026-03-25 23:23:38

●A76.10.194.872026-02-16 → 2026-03-25 · 3 obs

○ 2016-05-08 21:35:44
● 2026-02-16 02:51:46
● 2026-03-25 23:23:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
linuxcolumbus.com	ns2.linuxcolumbus.com, ns4.linuxcolumbus.com	2 records

✅ Authoritative Response

Server:76.10.194.81

NS records: ns2.linuxcolumbus.com, ns4.linuxcolumbus.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for linuxcolumbus.com (unsigned zone)

⏱️ Timing

Total: 174ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`76.10.194.87`
TXT	1	`v=spf1 a -all`

📌 Glue Records Collected

Total: 2

In-bailiwick: 2 (ns2.linuxcolumbus.com, ns4.linuxcolumbus.com)

Analysis

Mail Server Role

mail.linuxcolumbus.com is the mail server for linuxcolumbus.com.

IP Addresses

mail.linuxcolumbus.com points to a single IP number: 76.10.194.87.

Other host names like mail.allanholdsworth.net and mail.n8vw.com share IP numbers with mail.linuxcolumbus.com.

mail.linuxcolumbus.com - robtex.com