ns4.us.opalstack.com - dns.ninja

`ns4.us.opalstack.com`

DNSSEC	⚠️ Not signed
A	142.91.170.22^{🇺🇸 AS7203142.91.168.0/22 Leaseweb USA, Inc.}
		PTR	`webmail.us.opalstack.com`
MX	`mx1.de.opalstack.com` ⭐
		A	2a01:7e01:e001:856::1^{🇩🇪 AKAMAI-LINODE-AP2a01:7e01::/32 Akamai Technologies}
			PTR	`mx1.de.opalstack.com`
		A	139.162.189.90^{🇩🇪 AKAMAI-LINODE-AP139.162.160.0/19 Akamai Technologies}
			PTR	`mx1.de.opalstack.com`
MX	`mx2.de.opalstack.com` ⭐
		A	178.162.221.165^{🇩🇪 LEASEWEB-DE-FRA-10178.162.192.0/18}
			PTR	`mx2.de.opalstack.com`
TXT	`v=spf1 include:spf.opalstack.com ~all`

`us.opalstack.com`

	DNSSEC	⚠️ Not signed
	A	142.91.170.22^{🇺🇸 AS7203142.91.168.0/22 Leaseweb USA, Inc.}
	MX	`mx1.de.opalstack.com` ⭐
	MX	`mx2.de.opalstack.com` ⭐
	TXT	`v=spf1 include:spf.opalstack.com ~all`

NS for

vdc.ad

jdtaylor.org

Same first word

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4ns.eu

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n4s.fi

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4ns.com

DNS History

5 records (3 active, 2 former)

●MXmx1.de.opalstack.com2026-03-11 → 2026-06-04 · 24 obs

○ 2026-02-19 04:23:30
● 2026-03-11 00:55:30
○ 2026-03-22 21:34:18
● 2026-03-23 23:05:08
● 2026-03-27 07:56:56
○ 2026-04-02 13:29:50
○ 2026-04-15 00:59:22
● 2026-04-15 18:32:32
○ 2026-04-18 08:23:14
○ 2026-04-21 23:58:52
● 2026-04-24 04:16:58
○ 2026-04-25 13:42:14
○ 2026-05-09 17:43:14
● 2026-05-11 07:52:04
○ 2026-05-11 12:47:38
○ 2026-05-12 00:49:50
● 2026-05-12 14:57:22
● 2026-05-13 14:16:36
○ 2026-05-14 17:09:56
● 2026-05-15 14:35:10
○ 2026-05-16 12:58:48
○ 2026-05-24 02:01:28
● 2026-06-04 16:29:10
● 2026-06-04 16:29:12

○MXmx1.us.opalstack.com2026-02-19 → 2026-05-24 · 24 obs

● 2026-02-19 04:23:30
○ 2026-03-11 00:55:30
● 2026-03-22 21:34:18
○ 2026-03-23 23:05:08
○ 2026-03-27 07:56:56
● 2026-04-02 13:29:50
● 2026-04-15 00:59:22
○ 2026-04-15 18:32:32
● 2026-04-18 08:23:14
● 2026-04-21 23:58:52
○ 2026-04-24 04:16:58
● 2026-04-25 13:42:14
● 2026-05-09 17:43:14
○ 2026-05-11 07:52:04
● 2026-05-11 12:47:38
● 2026-05-12 00:49:50
○ 2026-05-12 14:57:22
○ 2026-05-13 14:16:36
● 2026-05-14 17:09:56
○ 2026-05-15 14:35:10
● 2026-05-16 12:58:48
● 2026-05-24 02:01:28
○ 2026-06-04 16:29:10
○ 2026-06-04 16:29:12

●MXmx2.de.opalstack.com2026-03-11 → 2026-06-04 · 24 obs

○MXmx2.us.opalstack.com2026-02-19 → 2026-05-24 · 24 obs

●A142.91.170.222026-02-19 → 2026-06-04 · 2 obs

● 2026-02-19 04:23:30
● 2026-06-04 16:29:12

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	i.gtld-servers.net, f.gtld-servers.net, a.gtld-servers.net, d.gtld-servers.net...	-
opalstack.com	ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com, ns1.de.opalstack.com	4 records

✅ Authoritative Response

Server:45.56.74.5

NS records: ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com, ns1.de.opalstack.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opalstack.com (unsigned zone)

⏱️ Timing

Total: 402ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`142.91.170.22`
MX	2	`mx1.us.opalstack.com (pri: 10), mx2.us.opalstack.com (pri: 10)`
TXT	1	`v=spf1 include:spf.opalstack.com ~all`

📌 Glue Records Collected

Total: 4

In-bailiwick: 4 (ns1.us.opalstack.com, ns2.us.opalstack.com, ns3.us.opalstack.com...)

Analysis

Name Server Role

vdc.ad and jdtaylor.org are both delegated to ns4.us.opalstack.com as a name server.

ns1.us.opalstack.com, ns2.us.opalstack.com and ns3.us.opalstack.com are commonly used as name server together with ns4.us.opalstack.com.

IP Addresses

ns4.us.opalstack.com directs to one IP number, which is 142.91.170.22.

webmail.us.opalstack.com and us.opalstack.com, along with other host names, share IP addresses with ns4.us.opalstack.com.

Mail Servers

The MX records for ns4.us.opalstack.com point to two mail servers: mx1.de.opalstack.com and mx2.de.opalstack.com.

ns4.us.opalstack.com has the same mail server arrangement as a number of other domains, for example bcortho.org, normfest.org, get-smart.net and two more.

ns4.us.opalstack.com has mail servers in common with other domains — for example hospitalrun.io, humanleg.org.uk and 100-downloads.com.

The mail servers mx1.us.opalstack.com and mx2.us.opalstack.com regularly co-occur with these mail servers.

Hosts with two IP numbers each:

mx1.de.opalstack.com has two IP addresses: 139.162.189.90 and 2a01:7e01:e001:856::1.

Host names with one IP number:

mx2.de.opalstack.com directs to 178.162.221.165.