Infrastructure
· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.CIPv6 ReadinessActionNo IPv6 supportREVIEW
IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.
No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.
Source: Google IPv6 stats
BTLS Certificate Expiry & Recommendations48 days until leaf cert expires — 2 issues to addressREVIEW
Certificate validity
Recommended actions
- Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
- Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy
A+DNS Records2 A records, 32 ms lookupPASS
| A | 104.18.32.188, 172.64.155.68 |
| AAAA | — |
| CNAME | — |
| NS | nico.ns.cloudflare.com, michelle.ns.cloudflare.com |
| MX | — |
| TXT | lb5s1tk5pf752szlssllf8tqqhw49vjp facebook-domain-verification=ct6p8jbb66z6nu28qz4817jrz0ed1a pinterest-site-verification=a6ef44050561dd412d6caa731124ca70 _cipqqw054v1ru0uh3vac064on4oegss npqd3ygsj1hnj55s1g71lwzkfwhznbn3 xpqv1hrsz3q41x16v4jq4zrfkq4hznyn mzhxtc5mtsykyrplh4zrg4z9m35snpvy |
| CAA | Lookup not available with standard resolver |
CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.
Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.
SPF helps prevent email spoofing. Add a TXT record starting with 'v=spf1'.
Without SPF, receiving servers can't validate sending IPs — your domain is easier to spoof in phishing.
Learn more ▾ ▴
SPF complements DMARC. Both should be published. SPF records list authorized sending IPs (e.g., `v=spf1 include:_spf.google.com ~all` for Google Workspace). After publishing, verify in Google Postmaster Tools or mxtoolbox.
Source: RFC 7208 (SPF)
ARedirect Chain1 redirect(s), 482 ms totalPASS
https://worldcat.org
178 ms · HTTP/1.1
https://search.worldcat.org/
304 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://worldcat.org | 301 | 178 ms | HTTP/1.1 | cloudflare |
| 2 | https://search.worldcat.org/ | 200 | 304 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 1 URLsPASS
User-agent: GPTBot
Disallow: /
# No ChatGPT user allowed anywhere on the site
User-agent: ChatGPT-User
Disallow: /
# No Google Bard allowed anywhere on the site
User-agent: Google-Extended
Disallow: /
# No Common Crawl Bot
User-agent: CCBot
Disallow: /
User-agent: *
Crawl-delay: 5
Disallow: /search
Disallow: /libraries/search
Disallow: /lists/search
Disallow: /user/account
Disallow: /user/lists
Disallow: /user/libraries
Disallow: /libraries
Disallow: /arcviewer
Disallow: /registry
Disallow: /formats-editions/*
Disallow: /search?q=*
Disallow: /libraries/search?q=*
Disallow: /lists/search?q=*
Sitemap: https://search.worldcat.org/sitemap.xml
AURL Variantswww/non-www, trailing slash, HTTP→HTTPSPASS
www / non-www
Preferred variant: non-www
HTTP → HTTPS
Use 301 (permanent) instead of 302 (temporary)
A+Domain Intelligenceworldcat.org — via Network Solutions, LLC, 28 years, 7 months old, hosted on CloudflarePASS
557 days
January 20, 2028
48 days
Issued by Google Trust Services
28 years, 7 months
Registered January 21, 1998
Enabled
Protects against DNS spoofing
Cloudflare
ASN AS13335
104.18.32.188
Network Solutions, LLC
Expiry timeline
Recommended actions
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
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.
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