IPv6 Addresses Detected
2a04:4e42:200::396
2a04:4e42:600::396
2a04:4e42::396
2a04:4e42:400::396
IPv4 Addresses Detected
151.101.65.140
151.101.193.140
151.101.1.140
151.101.129.140
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).
✓ 2a04:4e42:200::396, 2a04:4e42:600::396, 2a04:4e42::396, 2a04:4e42:400::396
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 — 321ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 484ms TTFB.
Website responds when connected exclusively over IPv6, with no IPv4 fallback. Simulates what happens when IPv4 is turned off.
✗ Site is not reachable when limited to 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 = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1, expires May 22 23:59:59 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.
✓ 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).
✓ 151.101.65.140, 151.101.193.140, 151.101.1.140, 151.101.129.140
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 76ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 8ms 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 | 18.37 ms (p95: 22.63) | 19.45 ms (p95: 20.66) | +1.1 ms |
| IPv4 | 18.89 ms (p95: 18.98) | 16.17 ms (p95: 17.21) | -2.7 ms | |
| IPv6 | 32.12 ms (p95: 32.64) | 19.45 ms (p95: 28.95) | -12.7 ms | |
| Cloudflare | IPv4 | 19.09 ms (p95: 21.02) | 9.2 ms (p95: 10.75) | -9.9 ms |
| Cloudflare | IPv6 | 16.88 ms (p95: 19.06) | 15.69 ms (p95: 20.11) | -1.2 ms |
Score History
Check History
Last 3 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
07 Mar 2026 01:16 UTC |
73 % | Partial | manual |
|
06 Mar 2026 19:09 UTC |
73 % | Partial | manual |
|
06 Mar 2026 18:48 UTC |
73 % | Partial | manual |