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75
Total
90
DNS
20
Email
88
Security
55
Network
100
Availability
Domainwww.bl.uk
IPv41
IPv61
MX records2
StatusActive
Domain technical report

The British Library - the national Library of the UK

www.bl.uk

Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us.

Generated: 2026-08-08T23:58:02-05:00 · Cached result

JSONCSVPDFVisit site
IPv41
IPv61
MX2
NS2

DiagnosticsMain findings and recommendations

✓
IPv4 (A)30 / 30 pts · Dns

1 IPv4 address(es) detected.

✓
IPv6 (AAAA)10 / 10 pts · Dns

1 IPv6 address(es) detected.

✓
Name server redundancy20 / 20 pts · Dns

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

✓
SOA record10 / 10 pts · Dns

Authoritative zone record.

✓
DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

✓
CAA policy5 / 5 pts · Dns

Certificate authority restriction.

!
DNS propagation0 / 10 pts · Dns

Agreement between public resolvers.

✓
MX records20 / 20 pts · Mail

2 MX record(s).

!
SPF0 / 25 pts · Mail

SPF policy not found.

!
DMARC0 / 25 pts · Mail

DMARC policy not found.

!
DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

!
MTA-STS0 / 5 pts · Mail

Mail transport policy.

!
TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓
Valid TLS certificate55 / 55 pts · Security

125 day(s) remaining.

✓
Certificate lifetime10 / 10 pts · Security

Full points require at least 30 days remaining.

i
HTTP security headers23 / 35 pts · Security

6 of 9 evaluated headers detected.

!
PTR reverse DNS0 / 30 pts · Network

PTR not detected.

i
IPv4 diversity20 / 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

3 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.
150.171.110.210

AAAA

3 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.
2603:1061:14:1d2::1

CNAME

1 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.

MX

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

TXT

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

NS

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

SOA

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

CAA

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

DS

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

DNSKEY

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

RRSIG

0 record(s)
—

Not configured

NSEC

0 record(s)
—

Not configured

NSEC3

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

SRV

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

NAPTR

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

TLSA

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

SSHFP

2 record(s)
fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net.
mr-a02.tm-azurefd.net.

SPF

Not configured
—

Not configured

DMARC

Not configured
—

Not configured

DKIM

Not found
—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted
Title
The British Library - the national Library of the UK
Description
Visit the national library of the UK. Explore our buildings, study, meet friends, attend an event and get free access to over 170 million items. Join us.
Final URL
https://www.bl.uk/
HTTP status
200

HTTP

Status
HTTP/2 200
Final URL
https://www.bl.uk/
Version
3
Server
X-Powered-By
Next.js

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available
Available
Yes
Issuer
DigiCert Inc
CN
www.bl.uk
Valid from
2026-06-11T19:00:00-05:00
Valid until
2026-12-12T17:59:59-06:00
Days remaining
125
Protocol
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384

Security headers

6 active
✓
HSTSImplemented
✓
Content Security PolicyImplemented
✓
X-Content-Type-OptionsImplemented
✓
X-Frame-OptionsImplemented
✓
Referrer PolicyImplemented
✓
Permissions PolicyImplemented
—
Cross-Origin-Opener-PolicyNot detected
—
Cross-Origin-Embedder-PolicyNot detected
—
Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Review
!
Differences detected

5 public resolvers queried.

ResolverServerResultLatency
Google
8.8.8.8
150.171.110.210
74,77 ms
Cloudflare
1.1.1.1
150.171.109.178
89,22 ms
Quad9
9.9.9.9
150.171.109.183
81,92 ms
OpenDNS
208.67.222.222
150.171.110.211
45,88 ms
AdGuard
94.140.14.14
150.171.109.183
79,57 ms

IP, geolocation and ASNAssociated network information

150.171.110.210

No data
success
No
country
region
city
asn
organization
isp

Visitor information

Visitor
ip
216.73.217.62
reverse
country
country_code
region
city
latitude
longitude
isp
organization
asn
timezone
browser
Other
os
Other
language
user_agent
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
is_bot
Yes
cloudflare
No

SMTPEmail port connectivity

fde-web-afd-prd-webfproj-001-eze5erb2dxckepgb.a02.azurefd.net

Port 25: Closed/unreachable - 9.6 ms - 
Port 465: Closed/unreachable - 4005.1 ms - 
Port 587: Closed/unreachable - 4020.6 ms -

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