4d-dc.com website report
Redcentric Data Centres - Home
Last scanned
Overall score
Fair
About 4d-dc.com
redcentricdatacentres.co.uk is a website. It describes itself as “Redcentric data centres is the UK-based colocation provider, with the solutions to support your organisation's digital transformation”. The site runs on WordPress, delivered through Cloudflare.
Score profile
Top issues to fix
6 issues found · 2 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Multiple H1 headings found
SEOKeep a single H1 per page and demote the others to H2/H3.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEOPublish an XML sitemap and reference it from robots.txt to speed up page discovery.
More than 20% of images are missing alt text
AccessibilityAdd alt attributes to the remaining images (use alt="" for purely decorative ones).
Technology stack
4d-dc.com is built with WordPress, jQuery and Google Analytics.
Hosting & DNS
4d-dc.com is delivered through Cloudflare.
- IP address
- —
- ASN
- —
- IPv6
- Not supported
- HTTP
- HTTP/2
Show DNS record values
TXT record contents are not republished; only their count is shown.
Security
4d-dc.com serves a certificate that fails verification (hostname mismatch) and sets 3 of 6 recommended security headers.
Security headers3 of 6 set
- HSTSForces HTTPS
- CSPBlocks injected scripts
- X-Frame-OptionsStops clickjacking
- X-Content-TypeStops MIME sniffing
- Referrer-PolicyLimits URL leakage
- Permissions-PolicyRestricts browser features
TLS certificate
- Names covered
- 1
- Cookies set
- 1
Email security
4d-dc.com scores C for email security, with SPF and DMARC policy “quarantine”.
- SPFWeak
Marks unlisted senders as suspicious (~all) but does not reject them.
- DMARCWeak
Forged mail is sent to spam.
- MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
- BIMINot set
Not published (optional).
Mail services authorised in SPF: Microsoft 365
Performance & carbon
4d-dc.com scores 75/100 for performance, with an estimated load time of 2.1 s. A visit emits an estimated 0.50 g of CO2 (grade D).
Page weight
- HTML 126 KB
- JavaScript 1.1 MB
- CSS 106 KB
- Est. load
- 2.06 s
- Response
- 2.06 s
- Scripts / CSS
- 39 / 3
Carbon per visitD
0.50 g CO2 per uncached view
Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.
SEO & accessibility
4d-dc.com scores 85/100 for SEO and 85/100 for accessibility, with 3 SEO issues to fix.
Heading structure
2 H1s; one is the convention.
Image alt text
11 images · 5 without alt text · 1 lazy-loaded
Links
- Internal 7
- External 6
SEO issues3
- Multiple H1 headings found
- robots.txt not found
- sitemap.xml not found
Accessibility issues1
- More than 20% of images are missing alt text
Technical details
Page metadata, social tags, crawl files and scan information.
Meta tags
- Title
- Redcentric Data Centres - Home
- Description
- Redcentric data centres is the UK-based colocation provider, with the solutions to support your organisation's digital transformation.
- Canonical
- https://redcentricdatacentres.co.uk/
- Language
- en-GB
- Robots meta
- index, follow, max-image-preview:large, max-snippet:-1, max-video-preview:-1
Crawl files
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
Structured data
- Microdata items
- 0
- RDFa items
- 0
Scan
- Final URL
- https://redcentricdatacentres.co.uk/
- HTTP status
- 200
- Redirects
- https://4d-dc.com → https://www.redcentricplc.com/uk-data-centres/ → https://www.redcentricplc.com/managed-services/uk-data-centres/ → https://redcentricdatacentres.co.uk/
- Scanned
- Aug 24, 2026, 1:23 PM
Own 4d-dc.com? Show your score
Add this badge to your site. It always shows the latest scan.
<a href="https://sitegraph.tech/site/4d-dc-com"><img src="https://sitegraph.tech/badge/4d-dc-com.svg" alt="4d-dc.com on SiteGraph" width="190" height="20" /></a>See something wrong on this report? Request a correction or ask for something to be removed.
Related websites
Same technology stack
criticalmention.com
Critical Mention by Onclusive
elogic.it
Dinova - Innovazione Digitale Per le Aziende
bazaart.com
AI design tools for small businesses | Bazaart
complyadvantage.com
ComplyAdvantage | AI-driven fraud & AML risk detection
denhaag.nl
Gemeente Den Haag
eventmobi.com
Best Event Management Software 2026 | EventMobi
Frequently asked questions about 4d-dc.com
- What is 4d-dc.com?
- redcentricdatacentres.co.uk is a website. It describes itself as “Redcentric data centres is the UK-based colocation provider, with the solutions to support your organisation's digital transformation”. The site runs on WordPress, delivered through Cloudflare.
- What technology does 4d-dc.com use?
- 4d-dc.com is built with WordPress, jQuery and Google Analytics.
- Who hosts 4d-dc.com?
- 4d-dc.com is delivered through Cloudflare.
- Is 4d-dc.com secure?
- 4d-dc.com serves a certificate that fails verification (hostname mismatch) and sets 3 of 6 recommended security headers.
- Is 4d-dc.com protected against email spoofing?
- 4d-dc.com scores C for email security, with SPF and DMARC policy “quarantine”.
- What is 4d-dc.com's overall score?
- 4d-dc.com has an overall SiteGraph score of 71/100, combining SEO (85), performance (75), security (40) and accessibility (85).
Open Graph & Twitter