`linearstack-com.mail.protection.outlook.com`

DNSSEC	⚠️ Not signed
A	2a01:111:f403:cc31::1^{🇦🇺 Microsoft2a01:111:f000::/36}
		PTR	`mail-sy8pr01cu00101.inbound.protection.outlook.com`
A	2a01:111:f403:cc31::2^{🇦🇺 Microsoft2a01:111:f000::/36}
A	2a01:111:f403:cc31::3^{🇦🇺 Microsoft2a01:111:f000::/36}
A	2a01:111:f403:cc33::1^{🇦🇺 Microsoft2a01:111:f000::/36}
A	52.101.149.1^{🇦🇺 Microsoft52.96.0.0/12 MICROSOFT}
A	52.101.149.9^{🇦🇺 Microsoft52.96.0.0/12 MICROSOFT}
A	52.101.151.0^{🇦🇺 Microsoft52.96.0.0/12 MICROSOFT}
A	52.101.151.5^{🇦🇺 Microsoft52.96.0.0/12 MICROSOFT}

`mail.protection.outlook.com`

	DNSSEC	⚠️ Not signed
	NS	`ns1-proddns.glbdns.o365filtering.com` ⭐ ⚠️ Not in parent delegation
	NS	`ns1-proddns.glbdns.protection.outlook.com` ⚠️ Not in zone NS records
	NS	`ns2-proddns.glbdns.o365filtering.com` ⚠️ Not in parent delegation
	NS	`ns2-proddns.glbdns.protection.outlook.com` ⚠️ Not in zone NS records
	SOA	`ns1-proddns.glbdns.o365filtering.com`hostmaster@o365filtering.com 2013-01-08 #1

WOT: SAFE (60/100)
WOT: SAFE (63/100)

MX for

linearstack.com

DNS History

10 records (8 active, 2 former)

○A2a01:111:f403:cc31::2026-03-27 → 2026-03-30 · 3 obs

● 2026-03-27 06:05:26
● 2026-03-30 02:44:02
○ 2026-04-12 01:26:04

●A2a01:111:f403:cc31::12026-03-30 → 2026-04-12 · 3 obs

○ 2026-03-27 06:05:26
● 2026-03-30 02:44:02
● 2026-04-12 01:26:04

●A2a01:111:f403:cc31::22026-03-27 → 2026-04-12 · 2 obs

● 2026-03-27 06:05:26
● 2026-04-12 01:26:04

●A2a01:111:f403:cc31::32026-03-27 → 2026-04-12 · 3 obs

● 2026-03-27 06:05:26
○ 2026-03-30 02:44:02
● 2026-04-12 01:26:04

●A2a01:111:f403:cc33::12026-03-27 → 2026-04-12 · 2 obs

● 2026-03-27 06:05:26
● 2026-04-12 01:26:04

●A52.101.149.12026-03-27 → 2026-04-12 · 2 obs

● 2026-03-27 06:05:26
● 2026-04-12 01:26:04

○A52.101.149.22026-03-27 → 2026-03-30 · 3 obs

● 2026-03-27 06:05:26
● 2026-03-30 02:44:02
○ 2026-04-12 01:26:04

●A52.101.149.92026-03-27 → 2026-04-12 · 2 obs

● 2026-03-27 06:05:26
● 2026-04-12 01:26:04

●A52.101.151.02026-03-27 → 2026-04-12 · 2 obs

● 2026-03-27 06:05:26
● 2026-04-12 01:26:04

●A52.101.151.52026-04-12 → 2026-04-12 · 2 obs

○ 2026-03-30 02:44:02
● 2026-04-12 01:26:04

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
mail.protection.outlook.com	ns1-proddns.glbdns.protection.outlook.com, ns2-proddns.glbdns.protection.outlook.com	-

✅ Authoritative Response

Server:104.47.118.145

NS records: ns1-proddns.glbdns.protection.outlook.com, ns2-proddns.glbdns.protection.outlook.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mail.protection.outlook.com (unsigned zone)

⏱️ Timing

Total: 156ms | Queries: -

📄 Records

Type	Count	Sample Data
A	4	`52.101.149.9, 52.101.149.1...`
AAAA	4	`2a01:111:f403:cc31::2, 2a01:111:f403:cc33::1...`

Analysis

Mail Server Role

linearstack-com.mail.protection.outlook.com serves as the mail server for linearstack.com.

IP Addresses

Eight IP numbers are pointed to by linearstack-com.mail.protection.outlook.com: 2a01:111:f403:cc31::1, 2a01:111:f403:cc31::2, 2a01:111:f403:cc31::3, 2a01:111:f403:cc33::1, 52.101.149.1, 52.101.149.9, 52.101.151.0 and 52.101.151.5.

For instance, other host names torrens-edu-au.mail.protection.outlook.com, resicarebuilders-com-au.mail.protection.outlook.com, strategiccoach-com-au.mail.protection.outlook.com, thetarngroup-com.mail.protection.outlook.com and ael-org-nz.mail.protection.outlook.com share IP numbers with linearstack-com.mail.protection.outlook.com.

linearstack-com.mail.protection.outlook.com - robtex.com