IPv6 Addresses Detected
2606:4700:3033::ac43:c5f3
2606:4700:3036::6815:1569
IPv4 Addresses Detected
104.21.21.105
172.67.197.243
Network Information
WHOISIPv6 Network
- Organization
- Cloudflare, Inc.
- Country
- US
- ASN
- AS13335 CLOUDFLARENET - Cloudflare, Inc., US
- Network
- 2606:4700::/32
IPv4 Network
- Organization
- Cloudflare, Inc.
- Country
- US
- ASN
- AS13335 CLOUDFLARENET - Cloudflare, Inc., US
- Network
- 104.16.0.0/12
Web Services
35%The domain has at least one IPv6 address (AAAA DNS record).
✓ 2606:4700:3033::ac43:c5f3, 2606:4700:3036::6815:1569
The IPv6 addresses are publicly routable — not link-local, ULA, loopback or documentation ranges.
✓ All addresses are globally routable.
Website reachable on port 80 when connecting via IPv6.
✓ HTTP (port 80) responds over IPv6 — 714ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 507ms TTFB.
Website responds when connected exclusively over IPv6, with no IPv4 fallback. Simulates what happens when IPv4 is turned off.
✓ Site is fully reachable via IPv6-only.
The SSL/TLS certificate is valid, not expired, and matches the domain when connected via IPv6.
✓ Certificate valid — issued by C = US, O = Let's Encrypt, CN = E8, expires Aug 16 11:29:59 2026 GMT
The domain has both A and AAAA records for backwards compatibility during the IPv6 transition.
✓ Domain has both A and AAAA records.
Server advertises HTTP/3 support via the Alt-Svc: h3 header.
✗ No HTTP/3 support detected.
DNS & DNSSEC
25%At least one authoritative nameserver has an IPv6 address (AAAA record).
✓ Nameserver has IPv6 address.
Authoritative nameserver accepts TCP connections on port 53 over IPv6.
✓ Nameserver is reachable via IPv6 on port 53.
Nameserver actually resolves DNS queries when asked over IPv6 — not just TCP open, but functionally answering.
✓ DNS queries answered over IPv6.
Full DNSSEC chain-of-trust validation passes. Prevents DNS cache poisoning and spoofing.
✗ DNSSEC validation failed or zone is unsigned.
A PTR record exists in ip6.arpa for the IPv6 address. Important for email delivery and network diagnostics.
✗ No PTR record found.
Delegation Signer record exists in the parent zone.
✗ No DS record at parent.
RRSIG signatures are present and not expired.
✗ No valid RRSIG found.
The cryptographic algorithm used for DNSSEC signing.
No DNSKEY record found.
Email Services
25%The domain has at least one MX (Mail Exchange) DNS record pointing to a mail server.
✗ No MX record found in DNS.
The highest-priority MX server resolves to an IPv6 address (AAAA record).
✗ MX server has no IPv6 address.
The MX server accepts SMTP connections (port 25) over IPv6 and responds with a 220 banner.
✗ SMTP is not reachable over IPv6.
The MX server supports STARTTLS encryption when connected over IPv6.
✗ STARTTLS not available over IPv6.
A TXT record with v=spf1 exists, declaring which servers may send email for this domain.
✓ SPF record found.
A DKIM public key is published at a common selector, enabling email signature verification.
No common DKIM selector found.
A DMARC policy record exists at _dmarc.<domain>, enabling email authentication reporting.
✗ No DMARC record found.
IPv4 Baseline
15%The domain has at least one IPv4 address (A DNS record).
✓ 104.21.21.105, 172.67.197.243
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 164ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 129ms TTFB.
DNS Resolution Performance
Comparison of A (IPv4) vs AAAA (IPv6) query times across resolvers and transports. Shows median (p50) of 3 samples.
| Resolver | Transport | A (IPv4) | AAAA (IPv6) | Delta |
|---|---|---|---|---|
| System | Default | 21.82 ms (p95: 23.9) | 21.73 ms (p95: 22.44) | -0.1 ms |
| IPv4 | 21.52 ms (p95: 37.08) | 36.86 ms (p95: 49.9) | +15.3 ms | |
| IPv6 | 29.74 ms (p95: 40.72) | 38.61 ms (p95: 40.12) | +8.9 ms | |
| Cloudflare | IPv4 | 11.13 ms (p95: 12.97) | 18.71 ms (p95: 20.38) | +7.6 ms |
| Cloudflare | IPv6 | 11.48 ms (p95: 22.89) | 24.15 ms (p95: 40.05) | +12.7 ms |
This result is backed by an HMAC-SHA256 signed evidence record. Scan the code or follow the link to verify the audit trail independently.
ab5a5f46-6766-4b16-aa10-fc6d2367e628
Score History
Check History
Last 3 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
13 Jun 2026 01:06 UTC |
65 % | Partial | scheduled |
|
07 Mar 2026 01:17 UTC |
19 % | None | manual |
|
06 Mar 2026 19:10 UTC |
19 % | None | manual |