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https://schema.org

Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.
SCORE
95
GRADE
A
FIX
1
REVIEW
2
PASS
5
INFO
1
Probed from Madrid, Spain
200 OK
Checks
9
5 PASS 2 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.

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.schema.org/
200https://schema.org/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://schema.org/ → https://schema.org/

Consistent

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

Certificate validity

61
days left
0d 30d 60d 90d+

Recommended actions

  • Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
  • 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
6 A records, 24 ms lookup
PASS
6 A records, 24 ms lookup
Info::
Resolves to 6 IPv4 address(es)
Got: 108.177.15.138, 108.177.15.139, 108.177.15.113, 108.177.15.100, 108.177.15.101, 108.177.15.102
Info::
Has 4 IPv6 (AAAA) record(s)
Got: 2a00:1450:400c:c0c::65, 2a00:1450:400c:c0c::71, 2a00:1450:400c:c0c::8a, 2a00:1450:400c:c0c::66
Info::
4 nameserver(s) configured
Got: ns1.google.com, ns2.google.com, ns3.google.com, ns4.google.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: 24 ms
Got: 24 ms
A108.177.15.138, 108.177.15.139, 108.177.15.113, 108.177.15.100, 108.177.15.101, 108.177.15.102
AAAA2a00:1450:400c:c0c::65, 2a00:1450:400c:c0c::71, 2a00:1450:400c:c0c::8a, 2a00:1450:400c:c0c::66
CNAME—
NSns1.google.com, ns2.google.com, ns3.google.com, ns4.google.com
MX
1 aspmx.l.google.com
5 alt1.aspmx.l.google.com
5 alt2.aspmx.l.google.com
10 aspmx2.googlemail.com
10 aspmx3.googlemail.com
TXT
SPF v=spf1 include:_spf.google.com ~all
CAALookup not available with standard resolver
Resolved in 24 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://schema.org

https://schema.org

70 ms · HTTP/1.1 FINAL

#URLStatusTimeProtocolServer
1https://schema.org20070 msHTTP/1.1Google Frontend
A+
IPv6 Readiness
IPv6 reachable (22 ms)
PASS
IPv6 reachable (22 ms)
Info::
IPv6 is configured and reachable at 2a00:1450:400c:c0c::65, 2a00:1450:400c:c0c::71, 2a00:1450:400c:c0c::8a, 2a00:1450:400c:c0c::66
Got: 22 ms connect
IPv6 Ready
AAAA Records 2a00:1450:400c:c0c::65, 2a00:1450:400c:c0c::71, 2a00:1450:400c:c0c::8a, 2a00:1450:400c:c0c::66 Connection Reachable (22 ms)
A+
Crawlability
robots.txt present, sitemap with 3015 URLs
PASS
robots.txt present, sitemap with 3015 URLs
Info::
robots.txt is present
Got: 96 bytes
Info::
sitemap.xml is present
Info::
sitemap.xml is valid XML
Info::
sitemap.xml contains 3015 entries
Info::
robots.txt references sitemap
robots.txt 200 OK
Size 96 B Sitemaps referenced 1 User-agents * Blocking No — crawling allowed
User-agent: *
Disallow: /docs/search_results.html
Sitemap: https://schema.org/docs/sitemap.xml
sitemap.xml 200 OK
Type URL Set URLs 3015 entries Valid XML Yes
Sample URLs:
A+
HTTP Probe Timing
Total 205 ms — DNS, TCP, TLS, TTFB, content transfer breakdown
PASS
DNS Lookup DNS Lookup — time to resolve the domain name to an IP address.
23 ms
TCP Connect TCP Connect — time to establish a TCP connection to the server.
21 ms
TLS Handshake TLS Handshake — time to complete the HTTPS encryption handshake.
24 ms
Time to First Byte Time to First Byte — how long the server takes to respond with the first byte of data.
206 ms
Total Time Total request time from DNS lookup through full response.
206 ms

Connection waterfall

DNS Lookup 23 ms TCP Connect 21 ms TLS Handshake 24 ms Server Processing 138 ms Content Transfer 0 ms
Domain Intelligence
Domain intelligence data not available
INFO
Domain intelligence data not available

RDAP and WHOIS lookup both failed

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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