`dublinisc.com`

DNSSEC	⚠️ Not signed
A	66.116.117.100^{🇺🇸 SWITCH-166.116.96.0/19 switch communication}
		PTR	`cust-66.116.117.100.switch.com`
NS	`pdns07.domaincontrol.com` ⭐
		A	2603:5:21f1::35^{🇺🇸 GODADDY-DNS2603:5:21f0::/44}
			PTR	`pdns07.domaincontrol.com`
		A	97.74.111.53^{🇺🇸 GODADDY-DNS97.74.110.0/23}
			PTR	`pdns07.domaincontrol.com`
NS	`pdns08.domaincontrol.com`
		A	2603:5:22f1::35^{🇺🇸 GODADDY-DNS2603:5:22f0::/44}
			PTR	`pdns08.domaincontrol.com`
		A	173.201.79.53^{🇺🇸 GODADDY-DNS173.201.78.0/23}
			PTR	`pdns08.domaincontrol.com`
MX	`mail3.us.studygroup.com` ⭐
		A	66.209.89.82^{🇺🇸 SWITCH-166.209.64.0/19 switch communication}
			PTR	`mail3.us.studygroup.com`
MX	`mail4.us.studygroup.com` ⭐
		A	66.209.89.83^{🇺🇸 SWITCH-166.209.64.0/19 switch communication}
			PTR	`mail4.us.studygroup.com`
MX	`mail.uk.studygroup.com`⁽²⁰⁾
		A	185.160.166.133^{🇬🇧 FourD-AS185.160.164.0/22}
			PTR	`mail.uk.studygroup.com`
MX	`mail2.uk.studygroup.com`⁽²⁰⁾
		A	185.160.166.134^{🇬🇧 FourD-AS185.160.164.0/22}
			PTR	`mail2.uk.studygroup.com`
TXT	`v=spf1 mx include:spf.mandrillapp.com include:_spf.salesforce.com include:spf...`
TXT	`v=verifydomain MS=6784210`
SOA	`pdns07.domaincontrol.com`dns@jomax.net 2026-02-12 #3

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1771291435

Subdomains

www.dublinisc.com

Same first word

dublinisc.com

Similar names

iscdublin.com

DNS History

14 records (7 active, 7 former)

○NSmns01.domaincontrol.com2015-08-09 → 2016-09-17 · 4 obs

● 2015-08-09 08:05:50
● 2016-09-17 13:22:14
○ 2017-06-05 16:07:12
○ 2026-03-24 04:54:16

○NSmns02.domaincontrol.com2015-08-09 → 2016-09-17 · 4 obs

● 2015-08-09 08:05:50
● 2016-09-17 13:22:14
○ 2017-06-05 16:07:12
○ 2026-03-24 04:54:16

●NSpdns07.domaincontrol.com2017-06-05 → 2026-03-24 · 3 obs

○ 2016-09-17 13:22:14
● 2017-06-05 16:07:12
● 2026-03-24 04:54:16

●NSpdns08.domaincontrol.com2017-06-05 → 2026-03-24 · 3 obs

○ 2016-09-17 13:22:14
● 2017-06-05 16:07:12
● 2026-03-24 04:54:16

○MXmail.au.studygroup.com2015-08-09 → 2017-06-05 · 4 obs

● 2015-08-09 08:05:50
● 2017-06-05 16:07:12
○ 2026-02-25 23:50:26
○ 2026-03-24 04:54:16

●MXmail.uk.studygroup.com2015-08-09 → 2026-03-24 · 2 obs

● 2015-08-09 08:05:50
● 2026-03-24 04:54:16

○MXmail.us.studygroup.com2015-08-09 → 2016-03-16 · 4 obs

● 2015-08-09 08:05:50
● 2016-03-16 03:04:20
○ 2016-09-17 13:22:14
○ 2026-03-24 04:54:16

○MXmail2.au.studygroup.com2015-08-09 → 2017-06-05 · 4 obs

● 2015-08-09 08:05:50
● 2017-06-05 16:07:12
○ 2026-02-25 23:50:26
○ 2026-03-24 04:54:16

●MXmail2.uk.studygroup.com2015-08-09 → 2026-03-24 · 2 obs

● 2015-08-09 08:05:50
● 2026-03-24 04:54:16

○MXmail2.us.studygroup.com2015-08-09 → 2016-03-16 · 4 obs

● 2015-08-09 08:05:50
● 2016-03-16 03:04:20
○ 2016-09-17 13:22:14
○ 2026-03-24 04:54:16

●MXmail3.us.studygroup.com2016-09-17 → 2026-03-24 · 3 obs

○ 2016-03-16 03:04:20
● 2016-09-17 13:22:14
● 2026-03-24 04:54:16

●MXmail4.us.studygroup.com2016-09-17 → 2026-03-24 · 3 obs

○ 2016-03-16 03:04:20
● 2016-09-17 13:22:14
● 2026-03-24 04:54:16

○A217.154.102.1672015-08-09 → 2016-09-17 · 4 obs

● 2015-08-09 08:05:50
● 2016-09-17 13:22:14
○ 2017-06-05 16:07:12
○ 2026-03-24 04:54:16

●A66.116.117.1002017-06-05 → 2026-03-24 · 3 obs

○ 2016-09-17 13:22:14
● 2017-06-05 16:07:12
● 2026-03-24 04:54:16

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
dublinisc.com	pdns07.domaincontrol.com, pdns08.domaincontrol.com	4 records

✅ Authoritative Response

Server:173.201.79.53

NS records: pdns07.domaincontrol.com, pdns08.domaincontrol.com

🔒 DNSSEC Status

🔐 Secure (DNSSEC validated)

Chain of trust verified from root to domain

⏱️ Timing

Total: 1447ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`66.116.117.100`
NS	2	`pdns07.domaincontrol.com, pdns08.domaincontrol.com`
MX	4	`mail.uk.studygroup.com (pri: 20), mail2.uk.studygroup.com (pri: 20)...`
TXT	2	`v=spf1 mx include:spf.mandrillapp.com in, v=verifydomain MS=6784210`
SOA	1	`pdns07.domaincontrol.com dns.jomax.net`

📌 Glue Records Collected

Total: 4

Out-of-bailiwick: 4 (pdns07.domaincontrol.com, pdns07.domaincontrol.com, pdns08.domaincontrol.com...)

Analysis

Hierarchy

dublinisc.com is the parent of www.dublinisc.com.

IP Addresses

dublinisc.com resolves to a single IP address: 66.116.117.100.

Other host names including cn.hollandisc.com, huddersfieldisc.com, www.hollandisc.com, studygroup.com and aberdeen-isc.ac.uk share IP numbers with dublinisc.com.

Name Servers

dublinisc.com's delegation uses two name servers, pdns07.domaincontrol.com and pdns08.domaincontrol.com.

dublinisc.com shares the same name server setup as other domains, for example razelo.com, lavo.pro, shabakeh7.tv, exeltisrewards.com and logonation.com.