`mail.horowitz-ullmann.com`

DNSSEC

⚠️ Not signed

`horowitz-ullmann.com`

	DNSSEC	⚠️ Not signed
	A	44.226.107.251^{🇺🇸 Amazon44.224.0.0/11 EC2 PDX prefix}
	NS	`ns1.bdm.microsoftonline.com` ⭐
	NS	`ns2.bdm.microsoftonline.com`
	NS	`ns3.bdm.microsoftonline.com`
	NS	`ns4.bdm.microsoftonline.com`
	MX	`horowitzullmann-com02b.mail.protection.outlook.com` ⭐
	TXT	`v=spf1 include:spf.protection.outlook.com -all`
	TXT	`mscid=4/QA7QS2Hq3SBgWmjJfNA12RnzgcRIY35jMzJYFyzNURp6stje1yhDoIQ9EkcvFN0YJO1vA...`
	TXT	`MS=ms91797753`
	SOA	`ns1.bdm.microsoftonline.com`azuredns-hostmaster@microsoft.com serial=1

Previously MX for

horowitz-ullmann.com

Same first word

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DNS History

1 record (0 active, 1 former)

○A38.122.226.1302015-06-09 → 2016-04-14 · 3 obs

● 2015-06-09 14:45:34
● 2016-04-14 13:46:40
○ 2026-07-29 06:10:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
horowitz-ullmann.com	ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com	8 records

✅ Authoritative Response

Server:150.171.21.208

NS records: ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com, ns3.bdm.microsoftonline.com, ns4.bdm.microsoftonline.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for horowitz-ullmann.com (unsigned zone)

⏱️ Timing

Total: 1265ms | Queries: -

📄 Records

Type	Count	Sample Data

📌 Glue Records Collected

Total: 8

Out-of-bailiwick: 8 (ns1.bdm.microsoftonline.com, ns1.bdm.microsoftonline.com, ns2.bdm.microsoftonline.com...)

mail.horowitz-ullmann.com - robtex.com