Website readiness profile · Snapshot 23 October 2026
dastelefonbuch.de
dastelefonbuch.de's public homepage, certificate and DNS checked against 31 practices and compared with 59 Search Engines sites.
- Readiness index
- 82/100
- Ahead of
- 86%
- Practices observed
- 24/31
- Popularity band
- Top 50K
Search Engines median 65
of measured Search Engines sites
0 of 31 could not be measured
Chrome UX Report top-sites list
Readiness by lane
Green: dastelefonbuch.de. Thin bar: Search Engines peer median.
Enable
90/100
Peers 74
Harden
83/100
Peers 57
Accelerate
78/100
Peers 68
Recover
0/100
Peers 8
Priority fixes for dastelefonbuch.de
Ordered by impact and by how common each practice is among peers.
Priority 1 · Accelerate
No render-blocking scripts in <head>
Observed: The homepage <head> loaded 4 external scripts without async or defer.
Why it matters: A plain <script src> in the head stops the browser from showing anything until that file has downloaded and run.
What to do: Add defer to scripts that need the DOM, async to independent ones such as analytics, or move them to the end of the body.
72% of Search Engines peers do this. Limit: Based on the homepage HTML delivered to an automated client; scripts that run later were not executed.
Guide: Control Third-Party Scripts Before They Control Your Page
Priority 2 · Enable
Canonical URL declared
Observed: The homepage did not declare a canonical URL.
What to do: Add a self-referencing canonical link to every indexable page, using the final https:// URL.
61% of Search Engines peers do this.
Priority 3 · Harden
CAA records limit who can issue certificates
Observed: No CAA record was found for dastelefonbuch.de, so any public certificate authority may issue for it.
What to do: Publish CAA records naming every CA you actually use, including the CAs your CDN uses for managed certificates. Add an iodef contact if you want reports.
On Cloudflare: Cloudflare documents which CAs its managed certificates need; include them in your CAA records.
37% of Search Engines peers do this.
Priority 4 · Accelerate
HTTP/3 advertised
Observed: The homepage did not advertise HTTP/3 through an Alt-Svc header.
What to do: Turn on HTTP/3 at your CDN. Browsers fall back to HTTP/2 automatically, so the risk is low.
On Cloudflare: Enable HTTP/3 (with QUIC) under Speed > Optimization > Protocol Optimization.
37% of Search Engines peers do this.
What dastelefonbuch.de already does well
Practices fewer than half of Search Engines peers use.
- Content Security Policy presentContent-Security-Policy present.28% of peers
- Referrer-Policy setReferrer-Policy present.28% of peers
- HSTS kept for at least a yearHSTS with a 365-day max-age covering subdomains.30% of peers
What we saw
- Homepage checked
- https://www.dastelefonbuch.de/
- Homepage response
- HTTP 200
- TLS
- TLSv1.3, HTTP/2
- Certificate
- Google Trust Services, 90-day validity, expiring 2027-01-15
- CDN or edge
- Cloudflare
- DNS operators
- Cloudflare
- HSTS
- max-age 365 days, includeSubDomains, preload
- DMARC policy
- p=quarantine
- Homepage HTML
- 130 KB, gzip
- Images on homepage
- 32 (webp 26, png 17, jpg 17, svg 5)
Limits: homepage only, one location, one moment. Header checks reflect the homepage response; other pages may differ.
Stack and providers
Seen in the homepage response, certificate and DNS. Provider pages compare how their customers configure the same checks.
All 31 checks
Select a gap for the method and fix. How each check works
Not observed 7
Observed 24
- HTTP requests move to HTTPS
- HSTS kept for at least a year
- TLS 1.3 negotiated
- Certificate has more than 14 days left
- Certificate lifetime of 100 days or less
- DMARC policy enforces quarantine or reject
- X-Content-Type-Options: nosniff
- Framing restricted
- Content Security Policy present
- Referrer-Policy set
- HTTP/2 negotiated
- HTML compressed
- Static files cached for 30 days or more
- Modern image formats in use
- Offscreen images lazy-loaded
- robots.txt published
- XML sitemap discoverable
- Reachable over IPv6
- Meta description written
- Mobile viewport configured
- Structured data present
- Social preview image set
- Page language declared
- At most one redirect to the homepage
Own dastelefonbuch.de?
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Live status for this site: Status Is Down: dastelefonbuch.de. This profile covers configuration only.