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Total

DNS

Email

Security

Network

100

Availability

Domaindcu.ie

IPv41

IPv60

MX records5

StatusActive

Domain technical report

Dublin City University | DCU

dcu.ie

Study at DCU and experience a vibrant community and excellent career prospects with plenty of undergraduate and graduate courses to choose from.

Generated: 2026-08-09T17:41:17-05:00 · Cached result

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IPv41

IPv60

MX5

NS4

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

IPv6 (AAAA)0 / 10 pts · Dns

0 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

4 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

DNSSEC chain0 / 15 pts · Dns

Both DS and DNSKEY are required.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

5 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

✓

DKIM20 / 20 pts · Mail

A DKIM selector was verified.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

181 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers16 / 35 pts · Security

4 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: ec2-99-80-221-0.eu-west-1.compute.amazonaws.com

IPv4 diversity20 / 35 pts · Network

Two or more IPv4 addresses receive full points.

IPv6 connectivity0 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

1 record(s)

99.80.221.0

AAAA

0 record(s)

—

Not configured

CNAME

0 record(s)

—

Not configured

MX

5 record(s)

10 alt4.aspmx.l.google.com.
1 aspmx.l.google.com.
10 alt3.aspmx.l.google.com.
5 alt1.aspmx.l.google.com.
5 alt2.aspmx.l.google.com.

TXT

19 record(s)

"access-domain-verification=d9d6dc874ff8027d490740b734b7b68f9ea85e8a3700c9cca4e190ff85331839" "" ""
"google-site-verification=EXPEu9FZQWgvmISt7Pvk2jsSgpSoTrTB3QvQZl8SvV0"
"amazonses:cwCK0+yQMUTHgS9M+5pTcODNRKB3mA+uJy/MT2PlujI="
"atlassian-domain-verification=VpIlIpt7hU3FQVY16iomqYV2d9Y6J5u0B1hI8Nq8brgqSz0eU3YgIWBK952ChthW"
"brevo-code:31f8096a79aa99e5d5eae3496217fee3"
"adobe-idp-site-verification=2536add4e894408f353318f2a5f4774fe76fc5fa9444ae17ae0c99f5deefd54f"
"teamviewer-sso-verification=acf2c4a62dc14205b2fecacccc216354"
"as=1273751144"
"HARICA-PZQEgnLWRx99PnHigIL"
"access-domain-verification=f2d14e56c304cb66f6c24f7251d14f66f99c86d9a1535b205731a5d762e86f98"
"abuseipdb-verification=vX8jkiir"
"v=spf1 include:_spf.google.com ip4:136.206.1.100 ip4:198.187.196.100 ip4:193.120.143.134 include:spf-eu.exlibrisgroup.com include:spf.protection.outlook.com include:mail.zendesk.com ~all"
"a93627cf39e4403f8e1d5a697e700555"
"google-site-verification=ijLls24tWJ3pf5tIOl2PtYpNMljP-GnZoKABhB-HuVI"
"peoplexd-domain-verification=6DD0C27DADE97F206143" ""
"google-site-verification=OYSjDhQ83PdCvam2LmLQ97vUl4-W7CJeOGKQ0F8v8Jk"
"91181760C626DF8110E2637866E685051CBEE8F0"
"google-site-verification=OhhU3papvOWhKcms7yBDSM-lFIYtIcvT2Fhw4ZjhuQQ"
"apple-domain-verification=8dGpQBywHgXJLSFU"

NS

4 record(s)

ns-105.awsdns-13.com.
ns-2005.awsdns-58.co.uk.
ns-870.awsdns-44.net.
ns-1250.awsdns-28.org.

SOA

1 record(s)

ns-2005.awsdns-58.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 86400

CAA

0 record(s)

—

Not configured

DS

0 record(s)

—

Not configured

DNSKEY

0 record(s)

—

Not configured

RRSIG

0 record(s)

—

Not configured

NSEC

0 record(s)

—

Not configured

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

1 record(s)

100 10 "s" "aaa+auth:radius.tls.tcp" "" _radsec._tcp.openroaming.eduroam.org.

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 include:_spf.google.com ip4:136.206.1.100 ip4:198.187.196.100 ip4:193.120.143.134 include:spf-eu.exlibrisgroup.com include:spf.protection.outlook.com include:mail.zendesk.com ~all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:dmarc@dcu.ie, mailto:xp52vxju@ag.eu.dmarcian.com

DKIM

Selector selector1

v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDU0MdKMt4rzkLtT6hkOfBqlHS7Z8FHnc1tT9fLoZutuL1ZiaUydhDbqQoKmtZFgZ2/tOmz86HiTMwvwhL9QSi5NGC55cHXDstTtorphrnyT0Bv/lJOYTnMwNPdTPoXlv3geDUZRwBBh6aRjzdWmEQaG1IDmQhZIChAVSrUggPy+QIDAQAB; n=1024,1451099143,1466910343

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Dublin City University | DCU

Description

Study at DCU and experience a vibrant community and excellent career prospects with plenty of undergraduate and graduate courses to choose from.

Final URL

https://www.dcu.ie/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.dcu.ie/

Version

Server

nginx

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Hellenic Academic and Research Institutions CA

dcu.ie

Valid from

2026-07-23T09:52:01-05:00

Valid until

2027-02-07T08:52:00-06:00

Days remaining

181

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

4 active

✓

HSTSImplemented

✓

Content Security PolicyImplemented

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

99.80.221.0

89,84 ms

Cloudflare

1.1.1.1

99.80.221.0

29,54 ms

Quad9

9.9.9.9

99.80.221.0

87,03 ms

OpenDNS

208.67.222.222

99.80.221.0

68,53 ms

AdGuard

94.140.14.14

99.80.221.0

47,47 ms

IP, geolocation and ASNAssociated network information

99.80.221.0

Identified

success

Yes

country

Ireland

country_code

region

Leinster

city

Dublin

latitude

53.3354479

longitude

-6.2519983

asn

16509

organization

Amazon Data Services Ireland Limited

isp

Amazon.com, Inc.

timezone

Europe/Dublin

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

alt4.aspmx.l.google.com

Port 25: Closed/unreachable - 0.7 ms - 
Port 465: Closed/unreachable - 4016.4 ms - 
Port 587: Closed/unreachable - 4006.1 ms -

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