`mail.holtsystems.com`

DNSSEC	⚠️ Not signed
A	192.252.146.30^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
		PTR	`s468.sureserver.com`

`holtsystems.com`

	DNSSEC	⚠️ Not signed
	A	192.252.146.30^{🇺🇸 ICDSoft192.252.144.0/20 SURESUPPORT LLC Waltham, MA, USA}
	NS	`ns1.s468.sureserver.com` ⭐
	NS	`ns2.s468.sureserver.com`
	MX	`mail.holtsystems.com` ⭐
	TXT	`v=spf1 a mx include:s468.smtp-spf.sureserver.com ~all`
	SOA	`ns1.s468.sureserver.com`hostmaster@holtsystems.com serial=1774826838

MX for

holtsystems.com

emedrec.us

Same first word

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DNS History

3 records (1 active, 2 former)

●A192.252.146.302026-02-23 → 2026-03-29 · 3 obs

○ 2016-10-16 07:33:22
● 2026-02-23 09:42:04
● 2026-03-29 23:54:12

○A64.14.68.532007-11-24 → 2007-11-24 · 3 obs

● 2007-11-24 21:33:44
○ 2015-08-20 03:03:02
○ 2026-03-29 23:54:12

○A64.14.78.432015-08-20 → 2016-10-16 · 5 obs

○ 2007-11-24 21:33:44
● 2015-08-20 03:03:02
● 2016-10-16 07:33:22
○ 2026-02-23 09:42:04
○ 2026-03-29 23:54:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, d.gtld-servers.net, g.gtld-servers.net, b.gtld-servers.net...	-
holtsystems.com	ns1.s468.sureserver.com, ns2.s468.sureserver.com	2 records

✅ Authoritative Response

Server:192.252.146.30

NS records: ns1.s468.sureserver.com, ns2.s468.sureserver.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for holtsystems.com (unsigned zone)

⏱️ Timing

Total: 87ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.252.146.30`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.s468.sureserver.com, ns2.s468.sureserver.com)

Analysis

Mail Server Role

mail.holtsystems.com serves as the mail server for holtsystems.com and emedrec.us.

IP Addresses

mail.holtsystems.com resolves to one IP number: 192.252.146.30.

Other host names, for instance surplus-electrical.com, mail.corkliquors.com, mktsltn.com, holdingpictures.com and www.bindralab.org share IP numbers with mail.holtsystems.com.

mail.holtsystems.com - robtex.com