IPv6 Addresses Detected
2a03:2880:f27f:1c0:face:b00c::167
IPv4 Addresses Detected
163.70.137.60
Network Information
WHOISIPv6 Network
- Organization
- meta-mnt
- Country
- IE
- ASN
- AS32934 FACEBOOK - Facebook, Inc., US
- Network
- 2a03:2880::/29
IPv4 Network
- Organization
- meta-mnt
- Country
- IE
- ASN
- AS32934 FACEBOOK - Facebook, Inc., US
- Network
- 163.70.128.0/17
Web Services
35%The domain has at least one IPv6 address (AAAA DNS record).
✓ 2a03:2880:f27f:1c0:face:b00c::167
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 — 1424ms TTFB.
Website reachable on port 443 when connecting via IPv6.
✓ HTTPS (port 443) responds over IPv6 — 471ms 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 = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1, expires Jun 19 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.
✓ 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.
✓ PTR record found in ip6.arpa.
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.
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).
✓ 163.70.137.60
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 486ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 404ms 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 | 6.82 ms (p95: 18.18) | 5.99 ms (p95: 5.99) | -0.8 ms |
| IPv4 | 26.3 ms (p95: 35.04) | 43.12 ms (p95: 45.63) | +16.8 ms | |
| IPv6 | 36.43 ms (p95: 42.2) | 26.18 ms (p95: 26.74) | -10.3 ms | |
| Cloudflare | IPv4 | 10.65 ms (p95: 11.12) | 7.98 ms (p95: 8.12) | -2.7 ms |
| Cloudflare | IPv6 | 17.46 ms (p95: 17.87) | 20.6 ms (p95: 29.26) | +3.1 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.
9df95252-9ae9-43d3-a573-601c144a3c47
Score History
Check History
Last 4 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
13 Jun 2026 01:05 UTC |
83 % | Partial | scheduled |
|
07 Mar 2026 01:16 UTC |
83 % | Partial | manual |
|
06 Mar 2026 19:09 UTC |
83 % | Partial | manual |
|
06 Mar 2026 18:48 UTC |
83 % | Partial | manual |