IPv6 Addresses Detected
2600:9000:2149:4c00:16:57f6:6e40:93a1
2600:9000:2149:4e00:16:57f6:6e40:93a1
2600:9000:2149:8000:16:57f6:6e40:93a1
2600:9000:2149:be00:16:57f6:6e40:93a1
2600:9000:2149:ce00:16:57f6:6e40:93a1
2600:9000:2149:a600:16:57f6:6e40:93a1
2600:9000:2149:7c00:16:57f6:6e40:93a1
2600:9000:2149:ee00:16:57f6:6e40:93a1
IPv4 Addresses Detected
99.86.18.80
99.86.18.67
99.86.18.30
99.86.18.91
Network Information
WHOISIPv6 Network
- Organization
- Amazon.com, Inc.
- Country
- US
- ASN
- AS16509 AMAZON-02 - Amazon.com, Inc., US
- Network
- 2600:9000::/28
IPv4 Network
- Organization
- Amazon.com, Inc.
- Country
- US
- ASN
- AS16509 AMAZON-02 - Amazon.com, Inc., US
- Network
- 99.86.0.0/16
Web Services
35%The domain has at least one IPv6 address (AAAA DNS record).
✓ 2600:9000:2149:4c00:16:57f6:6e40:93a1, 2600:9000:2149:4e00:16:57f6:6e40:93a1, 2600:9000:2149:8000:16:57f6:6e40:93a1, 2600:9000:2149:be00:16:57f6:6e40:93a1, 2600:9000:2149:ce00:16:57f6:6e40:93a1, 2600:9000:2149:a600:16:57f6:6e40:93a1, 2600:9000:2149:7c00:16:57f6:6e40:93a1, 2600:9000:2149:ee00:16:57f6:6e40:93a1
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 — 44ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 28ms 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 = Amazon, CN = Amazon RSA 2048 M04, expires Nov 6 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 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.
✓ DMARC record found.
IPv4 Baseline
15%The domain has at least one IPv4 address (A DNS record).
✓ 99.86.18.80, 99.86.18.67, 99.86.18.30, 99.86.18.91
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 54ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 32ms TTFB.
Render-Path Dependencies
not weightedAn AAAA record on this domain says nothing about the stylesheets, scripts and fonts the page then loads from somewhere else. Those are scored here, separately, because a blended figure would flatter both numbers. This score does not affect the 73% above.
The dependency chain could not be walked because this check predates dependency scoring. This is recorded as unmeasured rather than counted against the domain.
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 | 14.49 ms (p95: 21.65) | 21.65 ms (p95: 27.04) | +7.2 ms |
| IPv4 | 91.34 ms (p95: 97.39) | 91.09 ms (p95: 99.03) | -0.3 ms | |
| IPv6 | 98.36 ms (p95: 98.41) | 91.55 ms (p95: 98.05) | -6.8 ms | |
| Cloudflare | IPv4 | 22.93 ms (p95: 23.74) | 30.28 ms (p95: 30.33) | +7.4 ms |
| Cloudflare | IPv6 | 34.39 ms (p95: 38.89) | 36.95 ms (p95: 37) | +2.6 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.
f91e5551-2ba6-4417-a564-1af348bb1e0a
Score History
Check History
Last 7 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
08 Aug 2026 18:21 UTC |
73 % | Partial | manual |
|
08 Aug 2026 10:47 UTC |
73 % | Partial | manual |
|
01 Aug 2026 02:37 UTC |
73 % | Partial | scheduled |
|
04 Jul 2026 03:26 UTC |
73 % | Partial | scheduled |
|
13 Jun 2026 01:05 UTC |
73 % | Partial | scheduled |
|
07 Mar 2026 01:16 UTC |
73 % | Partial | manual |
|
06 Mar 2026 19:10 UTC |
73 % | Partial | manual |