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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
85
GRADE
B
FIX
1
REVIEW
3
PASS
5
INFO
0
Probed from Madrid, Spain
301 Moved Permanently
Checks
9
5 PASS 3 REVIEW 1 FIX
D
CDN & Delivery
Action
No CDN detected
FIX
No CDN detected
Warning::
No CDN detected
A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.
No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

C
IPv6 Readiness
Action
No IPv6 support
REVIEW
No IPv6 support
Info::
No IPv6 (AAAA) records found
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No IPv6 Support
About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

B
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
REVIEW
www/non-www, trailing slash, HTTP→HTTPS
Critical::
Both www and non-www versions serve content
Got: Both variants return 200 Expected: One variant 301-redirects to the other
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.which.co.uk/
200https://which.co.uk/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://which.co.uk/ → https://which.co.uk:443/

Consistent

B
TLS Certificate Expiry & Recommendations
180 days until leaf cert expires — 4 issues to address
REVIEW

Certificate validity

180
days left
0d 30d 60d 90d+

Recommended actions

  • Add includeSubDomains to the HSTS directive
  • Add the preload directive and submit to hstspreload.org once max-age + includeSubDomains are in place
  • Enable DNSSEC on your domain for DNS spoofing protection
  • Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+
DNS Records
3 A records, 78 ms lookup
PASS
3 A records, 78 ms lookup
Info::
Resolves to 3 IPv4 address(es)
Got: 52.208.9.18, 99.80.59.231, 52.212.130.129
Info::
No IPv6 (AAAA) records
Info::
4 nameserver(s) configured
Got: ns-523.awsdns-01.net, ns-177.awsdns-22.com, ns-1917.awsdns-47.co.uk, ns-1422.awsdns-49.org
Info::
2 mail exchanger(s) configured
Info::
CAA records not checked
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Info::
SPF record present in TXT
Info::
DNS resolution time: 78 ms
Got: 78 ms
A52.208.9.18, 99.80.59.231, 52.212.130.129
AAAA—
CNAME—
NSns-523.awsdns-01.net, ns-177.awsdns-22.com, ns-1917.awsdns-47.co.uk, ns-1422.awsdns-49.org
MX
10 eu-smtp-inbound-1.mimecast.com
10 eu-smtp-inbound-2.mimecast.com
TXT
aromgs6qiqg8pj1jb1pjrlauj4
miro-verification=b846e7e004e367a4cdd3846eb914b9d4eb039512
v6l9d2r09ja6g77qutcq7ilsn
google-site-verification=G9MNYtidgrmq1TPXYoUKYNKttYGGKJyhL34o4PdwIw4
SPF v=spf1 ip4:94.236.83.186 ip4:31.221.13.100 ip4:80.6.91.150 ip4:20.90.195.58 ip4:...
MS=ms82245533
google-site-verification=0MN6xZGSfGflkKqkEc3G5T5lUl1Z50bXZLDaHiiAd4U
google-site-verification=b1Vnna2dUtcb78hB5u-7iXPNAR14y9SKNEe_R73dEJ0
google-site-verification=jlQJbePfurATdOmjNF6qqjyHVjYeesmCyLDN5ONPGL0
google-site-verification=0QMXyo3nMSwR-94bFg7methDdzpba1PxCfgSFqaO0No
google-site-verification=9NsDhFNYG6NSPWl9xA5N5GE0RZEFJaFVCqJLNO1tOR8
afqc7jgv7k45mreq6hskb4ocun
ibmid=160e387d-4bf9-4b08-b21d-f99fb4d52040
google-site-verification=b1ndmTHZStdI3domVKX9jjdcm9COWAGKJPFle2p5BDM
segment-site-verification=llrtNcNx39akuOu1SgxKr8nPEPfyULiR
stripe-verification=2aad228fb271e51dbbf3fd2e2f20635eb01f2eca84fc53b0eca39babac67...
prodpad-domain-verification=LJK8VD7RHWPXPkmtt11dJdWumw42XcTXwRC4v7i35mw=
yandex-verification=077673d84d6a3cc3
google-site-verification=NjDwc9B0UoJ2YU81mF16yB3dXNEKlry6tuwsPxGrwME
google-site-verification=mCS7WZ9HUQX6GtHrOt7YSLkYNcLWwAcaTRrBW1X8zZA
google-site-verification=sGgHBFIVTfky1xT0xuQVqTKbFejGutWlfVDvpkf3j8Q
google-site-verification=mDwzQi_5rXbTs3I5zkNKTvIemetd3-Y_NsTr7F2BlK4
google-site-verification=IbWLGHFw91hFPzwHFSOiMnd2ay_Z_7G9Gls8rVfJJHw
google-site-verification=QmlAZem8P65cRL3keNScMhasPkfrXQiMh2eIzy7XPUs
onetrust-domain-verification=656e1cfaefcb4e5888663b08454a1af2
google-site-verification=JhkmHxCyu3JxJF-zkLKfjem03CWKSLxSfuzW8rd4KMI
1password-site-verification=4AVETKVHHFEDZI7ITTVKAPV75I
atlassian-domain-verification=DdM6v2tGCllZXbJSuV4hAe/4jUAMahcndL25R4LZJ1YzINQFOD...
apple-domain-verification=XhosNN1ptqHU9PN2
google-site-verification=YTCXquX-Ua7X6NEMEZnEuGy2tf5xk1w3EmdZqFJxpiY
facebook-domain-verification=jjwb9bvbtvrb1vipjl1lu7usucc07e
google-site-verification=VMg6Z1Nkesjiz8P8uxODS_dz2KEHOEbcyjjq5lsAsxE
google-site-verification=nUrcjrJwrWA7dwLuAHKeRCtQl_T0f7X-YjWw8OlCcdE
CAALookup not available with standard resolver
Resolved in 78 ms

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

A
Redirect Chain
1 redirect(s), 419 ms total
PASS
1 redirect(s), 419 ms total
Info::
Single redirect
Got: https://which.co.uk → https://www.which.co.uk/ (301)
Info::
WWW normalization redirect

https://which.co.uk

112 ms · HTTP/1.1

301

https://www.which.co.uk/

307 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://which.co.uk301112 msHTTP/1.1Apache
2https://www.which.co.uk/200307 msHTTP/1.1Apache

See the visual redirect chain in the HTTP Probe tab →

A+
Crawlability
robots.txt present, sitemap with 9 URLs
PASS
robots.txt present, sitemap with 9 URLs
Info::
robots.txt is present
Got: 1137 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 9 entries
Info::
Sitemap index with 9 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 1137 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *


Sitemap: https://www.which.co.uk/sitemap.xml


#

# disallow indexing of content archive

#


Disallow: /baby-and-child/archive/

Disallow: /energy/archive/

Disallow: /home-and-garden/archive/

Disallow: /money/archive/

Disallow: /technology/archive/



#

# disallow indexing of utility pages

#


Disallow: /about-which/contact-us/send-us-a-message/thank-you/

Disallow: /account/

Disallow: /beta/

Disallow: /cgi-bin/

Disallow: /competitions/best-buy/entry-thank-you/

Disallow: /components/

Disallow: /documents/

Disallow: /loginhelp/

Disallow: /loginidentification/

Disallow: /magazine/computing/thank-you/

Disallow: /media/popup/

Disallow: /new/

Disallow: /signup-light/

Disallow: /spp/

Disallow: /static/email-pdfs/

Disallow: /static/html/pdfs/

Disallow: /thank-you/

Disallow: /try-which/bbg/faqs/

Disallow: /try-which/bbg/terms-conditions/

Disallow: /try-which/price-predictor/

Disallow: /try-which/wills/

Disallow: /user/

Disallow: /static/signup/fra-pages/


#

# disallow indexing for test scopes

#


Disallow: /30585109/


#

# disallow search endpoint

#


Disallow: /search
sitemap.xml 200 OK
Type Sitemap Index URLs 9 entries Valid XML Yes
Child Sitemaps:
A
Domain Intelligence
which.co.uk — via Gandi, 31 years, 3 months old, hosted on AWS
PASS
which.co.uk — via Gandi, 31 years, 3 months old, hosted on AWS
Warning::
Domain expires in 70 days
Consider enabling auto-renewal to prevent accidental expiration.
Got: Expires Jul 1, 2026
Info::
DNSSEC is not enabled
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Info::
Registrar: Gandi
Warning::
Registrar lock is NOT enabled
The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.
Info::
Hosting: AWS
Got: AS16509
Domain expiry

EXPIRED

July 1, 2026

SSL certificate

180 days

Issued by Amazon

Domain age

31 years, 3 months

Registered July 1, 1995

DNSSEC

Not enabled

Protects against DNS spoofing

Hosting

AWS

ASN AS16509

52.212.130.129

Registrar

Gandi

Unlocked 4 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Recommended actions
  • Domain has EXPIRED — renew immediately to avoid total site outage
  • Enable DNSSEC to protect visitors from DNS spoofing
  • Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
Registrar Gandi
Created July 1, 1995 (31 years, 3 months ago)
Expires July 1, 2026 (2 months)
Last Updated May 27, 2025
Name Servers ns-1422.awsdns-49.org., ns-177.awsdns-22.com., ns-1917.awsdns-47.co.uk., ns-523.awsdns-01.net.
DNSSEC Not enabled
Hosting
IP Address 52.212.130.129
ASN AS16509 (AMAZON-02 - Amazon.com, Inc., US)
Provider AWS
Data source: rdap (0.4s)

Consider enabling auto-renewal to prevent accidental expiration.

Why this matters

Domain expiry approaching — renew immediately and ensure auto-renew + alerting are configured.

Source: ICANN renewal policy

DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.

Why this matters

Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.

Learn more ▾

DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.

Source: ICANN / RFC 4033

The domain can be transferred without an unlock step. Enable registrar lock (clientTransferProhibited) in your registrar's control panel to protect against unauthorized or accidental transfers.

Why this matters

Without registrar lock, an attacker who phishes your registrar credentials can transfer the domain in minutes — total brand hijack.

Learn more ▾

Registrar lock (clientTransferProhibited, clientUpdateProhibited, clientDeleteProhibited) requires extra verification before any transfer/update/delete. Every major registrar offers it free. Combined with 2FA on your registrar account, it's the strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 129 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
27 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
33 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
35 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
129 ms
Total Time Total request time from DNS lookup through full response.
129 ms

Connection waterfall

DNS Lookup 27 ms TCP Connect 33 ms TLS Handshake 35 ms Server Processing 34 ms Content Transfer 0 ms
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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