IPv6 Addresses Detected
2600:9000:2149:ac00:16:57f6:6e40:93a1
2600:9000:2149:1000:16:57f6:6e40:93a1
2600:9000:2149:4a00:16:57f6:6e40:93a1
2600:9000:2149:4600:16:57f6:6e40:93a1
2600:9000:2149:200:16:57f6:6e40:93a1
2600:9000:2149:6000:16:57f6:6e40:93a1
2600:9000:2149:cc00:16:57f6:6e40:93a1
2600:9000:2149:4200:16:57f6:6e40:93a1
IPv4 Addresses Detected
99.86.20.6
99.86.20.12
99.86.20.52
99.86.20.125
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:ac00:16:57f6:6e40:93a1, 2600:9000:2149:1000:16:57f6:6e40:93a1, 2600:9000:2149:4a00:16:57f6:6e40:93a1, 2600:9000:2149:4600:16:57f6:6e40:93a1, 2600:9000:2149:200:16:57f6:6e40:93a1, 2600:9000:2149:6000:16:57f6:6e40:93a1, 2600:9000:2149:cc00:16:57f6:6e40:93a1, 2600:9000:2149:4200:16:57f6:6e40:93a1
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 — 49ms 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).
✓ 99.86.20.6, 99.86.20.12, 99.86.20.52, 99.86.20.125
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 49ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 32ms 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 | 14.52 ms (p95: 34.67) | 9.06 ms (p95: 23.79) | -5.5 ms |
| IPv4 | 33.61 ms (p95: 39.45) | 35.37 ms (p95: 57.88) | +1.8 ms | |
| IPv6 | 36.01 ms (p95: 72.15) | 31.45 ms (p95: 33.8) | -4.6 ms | |
| Cloudflare | IPv4 | 22.71 ms (p95: 27.45) | 28.12 ms (p95: 40.09) | +5.4 ms |
| Cloudflare | IPv6 | 21.49 ms (p95: 36.36) | 24.76 ms (p95: 33.76) | +3.3 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.
ba34f7b7-5195-41bc-b94a-375cebd4240d
Score History
Check History
Last 4 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
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 |