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Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
88
GRADE
B
FIX
1
REVIEW
1
PASS
7
INFO
0
Probed from Santa Clara, United States
200 OK
Checks
9
7 PASS 1 REVIEW 1 FIX
F
IPv6 Readiness
Action
IPv6 records exist but unreachable
FIX
IPv6 records exist but unreachable
Warning::
IPv6 DNS records exist but server is not reachable
Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.
Got: 2606:4700:10::ac42:86f5, 2606:4700:10::ac42:896f
Info::
IPv6 connection error
Got: dial tcp6 [2606:4700:10::ac42:86f5]:443: connect: network is unreachable
IPv6 Misconfigured
AAAA Records 2606:4700:10::ac42:86f5, 2606:4700:10::ac42:896f Connection UNREACHABLE

Having AAAA records but an unreachable server is worse than no AAAA — clients may experience delays before falling back to IPv4.

Why this matters

Advertising IPv6 (AAAA records) without a reachable server means IPv6-preferring clients silently fail every connection.

Learn more ▾

Modern browsers prefer IPv6 if AAAA exists (Happy Eyeballs algorithm). If the IPv6 server isn't reachable, browsers fall back to IPv4 — but with seconds of added latency per request. Either fix IPv6 reachability or remove the AAAA records.

Source: RFC 8305 (Happy Eyeballs)

B
TLS Certificate Expiry & Recommendations
41 days until leaf cert expires — 3 issues to address
REVIEW

Certificate validity

41
days left
0d 30d 60d 90d+

Recommended actions

  • Submit your domain to hstspreload.org to be added to the Chrome preload list
  • 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
2 A records, 10 ms lookup
PASS
2 A records, 10 ms lookup
Info::
Resolves to 2 IPv4 address(es)
Got: 172.66.134.245, 172.66.137.111
Info::
Has 2 IPv6 (AAAA) record(s)
Got: 2606:4700:10::ac42:86f5, 2606:4700:10::ac42:896f
Info::
2 nameserver(s) configured
Got: jeff.ns.cloudflare.com, lucy.ns.cloudflare.com
Info::
5 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: 10 ms
Got: 10 ms
A172.66.134.245, 172.66.137.111
AAAA2606:4700:10::ac42:86f5, 2606:4700:10::ac42:896f
CNAME—
NSjeff.ns.cloudflare.com, lucy.ns.cloudflare.com
MX
1 aspmx.l.google.com
5 alt2.aspmx.l.google.com
5 alt1.aspmx.l.google.com
10 aspmx2.googlemail.com
10 aspmx3.googlemail.com
TXT
proxy-ssl.webflow.com
sendinblue-site-verification=4794744
brevo-code:1af3e8bb9f0b4211d6e27bb86d4e73c0
Sendinblue-code:34d700f1b575b8a982e48df7fdaae9a8
facebook-domain-verification=jbzhsmqwdxjzdp1xcu5aq6msw9hx1d
google-site-verification=Fb8TEfSkdtdBs6GDgeJYPyKQRGJAvS9smdhLR9GHQTc
SPF v=spf1 include:_spf.google.com include:spf.sendinblue.com include:amazonses.com ...
CAALookup not available with standard resolver
Resolved in 10 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
No redirects — direct access
PASS
No redirects — direct access
Info::
No redirects — direct access
Got: https://trezor.io

https://trezor.io

121 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://trezor.io200121 msHTTP/1.1cloudflare
A+
Crawlability
robots.txt present, sitemap with 6 URLs
PASS
robots.txt present, sitemap with 6 URLs
Info::
robots.txt is present
Got: 704 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 6 entries
Info::
Sitemap index with 6 child sitemaps
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 704 B Sitemaps referenced 7 User-agents * Blocking No — crawling allowed
User-Agent: *
Disallow: /cart
Disallow: /checkout/*
Disallow: /order/*
Disallow: /order-detail/*
Disallow: /order-failed/*
Disallow: /order-underpaid/*
Disallow: /order-3dsecure/*
Disallow: /mobile-download

Sitemap: https://trezor.io/content/sitemaps/production/sitemap-en.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-cs.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-ja.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-de.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-es-ES.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-fr.xml
Sitemap: https://trezor.io/content/sitemaps/production/sitemap-pt-BR.xml
sitemap.xml 200 OK
Type Sitemap Index URLs 6 entries Valid XML Yes
Child Sitemaps:
A+
URL Variants
www/non-www, trailing slash, HTTP→HTTPS
PASS
www/non-www, trailing slash, HTTP→HTTPS
Info::
www/non-www redirect configured correctly (preferred: non-www)
Info::
HTTP correctly 301-redirects to HTTPS

www / non-www

301https://www.trezor.io/
200https://trezor.io/

Preferred variant: non-www

HTTP → HTTPS

301http://trezor.io/ → https://trezor.io/

Consistent

A+
Domain Intelligence
trezor.io — via Cloudflare, Inc, 11 years, 11 months old, hosted on Cloudflare
PASS
trezor.io — via Cloudflare, Inc, 11 years, 11 months old, hosted on Cloudflare
Info::
Domain registered until Jul 21, 2028 (2 years, 3 months remaining)
Info::
Registrar: Cloudflare, Inc
Info::
Registrar lock is enabled
Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.
Info::
Hosting: Cloudflare
Got: AS13335
Domain expiry

735 days

July 21, 2028

SSL certificate

41 days

Issued by Let's Encrypt

Domain age

11 years, 11 months

Registered July 21, 2014

DNSSEC

Status unknown

Protects against DNS spoofing

Hosting

Cloudflare

ASN AS13335

172.66.137.111

Registrar

Cloudflare, Inc

Locked 2 NS records
Expiry timeline
Today
+1 year
Domain expiry SSL expiry Danger zone (≤30 days)
Registrar Cloudflare, Inc
Created July 21, 2014 (11 years, 11 months ago)
Expires July 21, 2028 (2 years, 3 months)
Last Updated March 1, 2025
Name Servers lucy.ns.cloudflare.com, jeff.ns.cloudflare.com
Registrant SatoshiLabs Group a.s.
Hosting
IP Address 172.66.137.111
ASN AS13335 (CLOUDFLARENET - Cloudflare, Inc., US)
Provider Cloudflare
Data source: whois (0.4s)

Domain cannot be transferred without explicit unlock from the registrar. This protects against unauthorized transfers.

Why this matters

Registrar lock (clientTransferProhibited et al.) prevents unauthorized domain transfers — strongest defense against domain hijacking.

Source: ICANN / domain-security best practice

A+
HTTP Probe Timing
Total 139 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
5 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
4 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
11 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
73 ms
Total Time Total request time from DNS lookup through full response.
140 ms

Connection waterfall

DNS Lookup 5 ms TCP Connect 4 ms TLS Handshake 11 ms Server Processing 52 ms Content Transfer 67 ms
A+
CDN & Delivery
Cloudflare (HIT)
PASS
Cloudflare (HIT)
Info::
Site is served via Cloudflare CDN (edge: SJC)
Got: cf-ray: 9f073289bed99e6a-SJC
Info::
CDN cache status: HIT
CDN Detected: Cloudflare
Provider Cloudflare Cache Status HIT Evidence cf-ray: 9f073289bed99e6a-SJC
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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