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Total

DNS

Email

Security

Network

100

Availability

Domainnationalgallery.org.uk

IPv42

IPv62

MX records2

StatusActive

Domain technical report

The National Gallery, London

nationalgallery.org.uk

The Nation's Gallery. The story of European art, masterpiece by masterpiece.

Generated: 2026-08-09T07:51:53-05:00 · Cached result

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IPv42

IPv62

MX2

NS3

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

3 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

2 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

53 day(s) remaining.

✓

Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

PTR reverse DNS0 / 30 pts · Network

PTR not detected.

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 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

2 record(s)

104.18.31.156
104.18.30.156

AAAA

2 record(s)

2606:4700::6812:1f9c
2606:4700::6812:1e9c

CNAME

0 record(s)

—

Not configured

MX

2 record(s)

10 eu-smtp-inbound-2.mimecast.com.
5 eu-smtp-inbound-1.mimecast.com.

TXT

10 record(s)

"Mosyle-verification- 1770668849"
"apple-domain-verification=ND7TUlTdAgIwm06n"
"MS=ms54616200"
"0ed1fe018a6ece01656c2f45e892b02f450de96d6a"
"7oe9ol0gt0u67a3speufaefhka"
"google-site-verification=BuFr9DolrVy9w2345Pwewmu88bGrAwWaejPFkkyMa2k"
"v=spf1 mx include:eu._netblocks.mimecast.com include:spf.dynect.net include:em.nationalgallery.org.uk include:eu.rp.oracleemaildelivery.com -all"
"google-site-verification=2zC3lzIuNm90jAQfDYo1m5Z7xIs7u7VMKEoZhJII7oA"
"l1mdn7ufdbvph7l4c6v8csvt66"
"sophos-domain-verification=423504ddb7409b5ac5f630c8683ba0d4695acea93505c68e303e289ff8205e62"

NS

3 record(s)

blue.foundationdns.net.
blue.foundationdns.com.
blue.foundationdns.org.

SOA

1 record(s)

blue.foundationdns.com. dns.cloudflare.com. 2411739529 10000 2400 604800 1800

CAA

0 record(s)

—

Not configured

DS

0 record(s)

—

Not configured

DNSKEY

2 record(s)

256 3 13 oJMRESz5E4gYzS/q6XDrvU1qMPYIjCWzJaOau8XNEZeqCYKD5ar0IRd8 KqXXFJkqmVfRvMGPmM1x8fGAa2XhSA==
257 3 13 mdsswUyr3DPW132mOi8V9xESWE8jTo0dxCjjnopKl+GqJxpVXckHAeF+ KkxLbxILfDLUT0rAK9iUzy1L53eKGQ==

RRSIG

0 record(s)

—

Not configured

NSEC

1 record(s)

\000.nationalgallery.org.uk. A NS SOA PTR HINFO MX TXT AAAA LOC SRV NAPTR CERT SSHFP RRSIG NSEC DNSKEY TLSA SMIMEA HIP CDS CDNSKEY OPENPGPKEY SVCB HTTPS URI CAA

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 mx include:eu._netblocks.mimecast.com include:spf.dynect.net include:em.nationalgallery.org.uk include:eu.rp.oracleemaildelivery.com -all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:543d82f32ed34205a94f99018162a77c@dmarc-reports.cloudflare.net,mailto:dmarc-rua@dmarc.service.gov.uk, mailto:28220a06a429516@rep.dmarcanalyzer.com; ruf=mailto:28220a06a429516@for.dmarcanalyzer.com; fo=1;

DKIM

Selector s1

k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAzmCunqxL9yPaPmgRGqd2HJB9+RySZjhRb3BC1S8I6nq748LFfnNMkG16uJMwszZ8B+SzHZqs1/kvnSP8ehMafeb7HVDnrTPQLVos3xnrV1aQkEKQ3nRQ/Ij9REDQBytETu6G45qawft9icIdR2RvJ/drJAiUynuLgVyu+A4TWY8hw9EQ6QylQpm8ng/XlHIuPnbiJYu0xbdGQD3d3lrZbxM/nbsFIGM79y4ZhK7c6byWejTzkkI1Igs2lhTEzABjcSY2epqT+0zepa/I0AGVQGxXi+Akvrm7iqrNtkKbRwoIPNX63CmOD2OURAru40cfutEz6cqRaoMAFfDunOFCNQIDAQAB

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

The National Gallery, London

Description

The Nation's Gallery. The story of European art, masterpiece by masterpiece.

Final URL

https://www.nationalgallery.org.uk/

HTTP status

200

HTTP

Status

HTTP/2 200

Final URL

https://www.nationalgallery.org.uk/

Version

Server

cloudflare

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Google Trust Services

nationalgallery.org.uk

Valid from

2026-07-04T05:30:20-05:00

Valid until

2026-10-02T06:29:58-05:00

Days remaining

Protocol

TLSv1.3

Cipher

TLS_AES_256_GCM_SHA384

Security headers

3 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

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

104.18.30.156, 104.18.31.156

79,91 ms

Cloudflare

1.1.1.1

104.18.30.156, 104.18.31.156

46,99 ms

Quad9

9.9.9.9

104.18.30.156, 104.18.31.156

63,32 ms

OpenDNS

208.67.222.222

104.18.30.156, 104.18.31.156

72,75 ms

AdGuard

94.140.14.14

104.18.30.156, 104.18.31.156

205,12 ms

IP, geolocation and ASNAssociated network information

104.18.31.156

No data

success

country

region

city

asn

organization

isp

104.18.30.156

No data

success

country

region

city

asn

organization

isp

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

eu-smtp-inbound-2.mimecast.com

Port 25: Closed/unreachable - 1.1 ms - 
Port 465: Closed/unreachable - 4020.2 ms - 
Port 587: Closed/unreachable - 125.1 ms - 220 eu-smtp-inbound-1.mimecast.com ESMTP; Sun, 09 Aug 2026 13:51:51 +0100

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