IPv6 Addresses Detected
2a04:4e42::311
2a04:4e42:200::311
2a04:4e42:400::311
2a04:4e42:600::311
IPv4 Addresses Detected
151.101.129.55
151.101.193.55
151.101.1.55
151.101.65.55
Network Information
WHOISIPv6 Network
- Organization
- FASTLY
- Country
- US
- ASN
- AS54113 FASTLY - Fastly, Inc., US
- Network
- 2a04:4e40::/29
IPv4 Network
- Organization
- Fastly, Inc.
- Country
- US
- ASN
- AS54113 FASTLY - Fastly, Inc., US
- Network
- 151.101.0.0/16
Web Services
35%The domain has at least one IPv6 address (AAAA DNS record).
✓ 2a04:4e42::311, 2a04:4e42:200::311, 2a04:4e42:400::311, 2a04:4e42:600::311
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 — 322ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 8ms 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 = R12, expires Aug 16 15:59:16 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.
✓ Alt-Svc: h3 header 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.
✓ MX record found.
The highest-priority MX server resolves to an IPv6 address (AAAA record).
✓ MX server has AAAA record.
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.
DKIM selector found: google._domainkey
A DMARC policy record exists at _dmarc.<domain>, enabling email authentication reporting.
✓ DMARC record found.
IPv4 Baseline
15%The domain has at least one IPv4 address (A DNS record).
✓ 151.101.129.55, 151.101.193.55, 151.101.1.55, 151.101.65.55
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 14ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 9ms 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 | 25.92 ms (p95: 26.81) | 18.24 ms (p95: 26.93) | -7.7 ms |
| IPv4 | 36.42 ms (p95: 41.97) | 29.4 ms (p95: 39.01) | -7 ms | |
| IPv6 | 43 ms (p95: 321.92) | 41.28 ms (p95: 271.6) | -1.7 ms | |
| Cloudflare | IPv4 | 29.6 ms (p95: 30.55) | 14.87 ms (p95: 17.11) | -14.7 ms |
| Cloudflare | IPv6 | 25.07 ms (p95: 33.22) | 33.5 ms (p95: 42.8) | +8.4 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.
3b36df92-8933-4f7d-8416-dbe8c16a7650
Score History
Check History
Last 5 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
04 Jul 2026 03:25 UTC |
82 % | Partial | scheduled |
|
13 Jun 2026 01:05 UTC |
82 % | Partial | scheduled |
|
07 Mar 2026 01:16 UTC |
82 % | Partial | manual |
|
06 Mar 2026 19:10 UTC |
82 % | Partial | manual |
|
06 Mar 2026 18:48 UTC |
82 % | Partial | manual |