IPv6 Addresses Detected
2606:4700:3037::ac43:8624
2606:4700:3037::6815:60b
IPv4 Addresses Detected
104.21.6.11
172.67.134.36
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).
✓ 2606:4700:3037::ac43:8624, 2606:4700:3037::6815:60b
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 — 688ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 81ms 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 = Google Trust Services, CN = WE1, expires Aug 12 18:59:52 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 fully validated.
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.
✓ DS record found at parent zone.
RRSIG signatures are present and not expired.
✓ RRSIG signatures are current and valid.
The cryptographic algorithm used for DNSSEC signing.
ECDSAP256SHA256
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).
✓ 104.21.6.11, 172.67.134.36
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 196ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 1224ms 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 | 7.11 ms (p95: 8.08) | 8.85 ms (p95: 19.15) | +1.7 ms |
| IPv4 | 34.6 ms (p95: 42.89) | 31.56 ms (p95: 32.17) | -3 ms | |
| IPv6 | 26.19 ms (p95: 35.21) | 36.77 ms (p95: 37.75) | +10.6 ms | |
| Cloudflare | IPv4 | 11.46 ms (p95: 21.94) | 22.86 ms (p95: 23.27) | +11.4 ms |
| Cloudflare | IPv6 | 26.49 ms (p95: 34.11) | 17.41 ms (p95: 25.04) | -9.1 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.
e5bdf596-ad71-4733-a84b-e728c611716c
Score History
Check History
Last 21 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
13 Jun 2026 01:04 UTC |
87 % | Partial | scheduled |
|
12 Jun 2026 22:54 UTC |
95 % | Full | scheduled |
|
07 Mar 2026 01:33 UTC |
95 % | Full | manual |
|
07 Mar 2026 01:15 UTC |
87 % | Partial | manual |
|
07 Mar 2026 00:20 UTC |
95 % | Full | manual |
|
06 Mar 2026 19:08 UTC |
87 % | Partial | manual |
|
06 Mar 2026 18:03 UTC |
95 % | Full | manual |
|
06 Mar 2026 18:01 UTC |
95 % | Full | manual |
|
06 Mar 2026 17:59 UTC |
87 % | Partial | manual |
|
06 Mar 2026 17:59 UTC |
87 % | Partial | manual |
|
06 Mar 2026 17:49 UTC |
87 % | Partial | manual |
|
06 Mar 2026 17:26 UTC |
87 % | Partial | manual |
|
06 Mar 2026 17:22 UTC |
87 % | Partial | manual |
|
06 Mar 2026 17:11 UTC |
95 % | Full | manual |
|
06 Mar 2026 17:01 UTC |
90 % | Full | manual |
|
06 Mar 2026 16:59 UTC |
90 % | Full | manual |
|
06 Mar 2026 16:48 UTC |
86 % | Partial | manual |
|
06 Mar 2026 16:36 UTC |
0 % | None | manual |
|
06 Mar 2026 16:34 UTC |
86 % | Partial | manual |
|
06 Mar 2026 11:33 UTC |
78 % | Partial | manual |
|
04 Mar 2026 03:18 UTC |
78 % | Partial | manual |