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
BURL Variantswww/non-www, trailing slash, HTTP→HTTPSREVIEW
www / non-www
Inconsistent — duplicate content risk
HTTP → HTTPS
Consistent
BTLS Certificate Expiry & Recommendations262 days until leaf cert expires — 3 issues to addressREVIEW
Certificate validity
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 Records4 A records, 29 ms lookupPASS
| A | 52.222.149.103, 52.222.149.16, 52.222.149.24, 52.222.149.120 |
| AAAA | — |
| CNAME | — |
| NS | ns-1914.awsdns-47.co.uk, ns-1411.awsdns-48.org, ns-225.awsdns-28.com, ns-556.awsdns-05.net |
| MX | 10 aspmx.l.google.com 20 alt2.aspmx.l.google.com 20 alt1.aspmx.l.google.com 30 aspmx4.googlemail.com |
| TXT | google-site-verification=rivq8jKu6AADGtbbEzJhmOpcqq08B7QxIzXxYV8DtyU SPF v=spf1 include:_spf.google.com include:mailgun.org a:rsweb1-36.investorflow.com ... openai-domain-verification=dv-QbhxxK0G0JK0dnyZ4YTsNAfw google-site-verification=GJKdQskycEclAGPua3yXB9m_nVhxbrsVps_y-t9SXV0 ca3-4861b957e83847c188e45d04ec314ee3 apple-domain-verification=WG0sP5Alm7N6h1Te dropbox-domain-verification=asc63coma4mv anthropic-domain-verification-0qe2ww=yK576oHdDgyTcXgkPfj1KXgGt Wayback verify for support request 741082 rippling-domain-verification=a660f7a4ab77a3de google-site-verification=KsI69Y_jEVkp4eXqSQ9R9gwxjIpZznvuvrus6UolB9Y ZOOM_verify_2ndw8KZxSRa8PT8NmdyXvw |
| 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.
ARedirect Chain1 redirect(s), 446 ms totalPASS
https://ycombinator.com
54 ms · HTTP/1.1
https://www.ycombinator.com/
391 ms · HTTP/1.1 FINAL
| # | URL | Status | Time | Protocol | Server |
|---|---|---|---|---|---|
| 1 | https://ycombinator.com | 301 | 54 ms | HTTP/1.1 | AmazonS3 |
| 2 | https://www.ycombinator.com/ | 200 | 391 ms | HTTP/1.1 | cloudflare |
See the visual redirect chain in the HTTP Probe tab →
A+Crawlabilityrobots.txt present, sitemap with 86 URLsPASS
Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.
robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.
Source: sitemaps.org
User-Agent: *
Disallow: /verify/*
Disallow: /library?categories=*&*
Allow: /library?categories=*
Disallow: /library?*
Disallow: /companies?*
Allow: /
User-Agent: facebookexternalhit
Allow: /verify/*
User-Agent: Twitterbot
Allow: /verify/*
User-Agent: LinkedInBot
Allow: /verify/*
A+Domain Intelligenceycombinator.com — via Gandi SAS, 21 years, 4 months old, hosted on AWSPASS
280 days
March 20, 2027
262 days
Issued by Amazon
21 years, 4 months
Registered March 20, 2005
Not enabled
Protects against DNS spoofing
AWS
ASN AS16509
52.222.149.24
Gandi SAS
Expiry timeline
Recommended actions
- Enable DNSSEC to protect visitors from DNS spoofing
- Enable registrar lock (clientTransferProhibited) to block unauthorized domain transfers
DNSSEC protects against DNS spoofing attacks. While not required, enabling DNSSEC adds an additional layer of security. Contact your DNS provider to enable it.
Without DNSSEC, an attacker who can poison your DNS can hijack your domain — and SSL certs alone don't stop them.
Learn more ▾ ▴
DNSSEC adds cryptographic signatures to DNS records, preventing forged responses from poisoning resolver caches. Without it, an attacker who controls the network path can redirect your domain to a malicious server before any HTTPS handshake happens. Most modern registrars (Cloudflare, Google Domains, Route 53) enable it with one toggle.
Source: ICANN / RFC 4033
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