IPv4 Addresses Detected
52.253.83.103
Network Information
WHOISIPv4 Network
- Organization
- Microsoft Corporation
- Country
- US
- ASN
- AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US
- Network
- 52.224.0.0/11
Web Services
35%The domain has at least one IPv6 address (AAAA DNS record).
✗ No AAAA record found in DNS.
The IPv6 addresses are publicly routable — not link-local, ULA, loopback or documentation ranges.
✗ IPv6 address is not globally routable.
Website reachable on port 80 when connecting via IPv6.
✗ HTTP is not accessible over IPv6.
Website reachable on port 443 when connecting via IPv6.
✗ HTTPS is not accessible over IPv6.
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.
✗ TLS certificate is invalid, expired, or hostname mismatch over IPv6.
The domain has both A and AAAA records for backwards compatibility during the IPv6 transition.
✗ Domain is IPv6-only or IPv4-only.
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).
✗ No nameserver has an AAAA record.
Authoritative nameserver accepts TCP connections on port 53 over IPv6.
✗ No nameserver is reachable over IPv6.
Nameserver actually resolves DNS queries when asked over IPv6 — not just TCP open, but functionally answering.
✗ Nameserver does not answer queries 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.
RSASHA256
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 port 25 responds over IPv6.
The MX server supports STARTTLS encryption when connected over IPv6.
✓ STARTTLS supported 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).
✓ 52.253.83.103
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 141ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 238ms 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 45% 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 | 22.72 ms (p95: 23.04) | 22.39 ms (p95: 23.87) | -0.3 ms |
| IPv4 | 33.93 ms (p95: 81.83) | 30.95 ms (p95: 143.71) | -3 ms | |
| IPv6 | 35.84 ms (p95: 142.77) | 151.39 ms (p95: 156.94) | +115.6 ms | |
| Cloudflare | IPv4 | 24.01 ms (p95: 24.74) | 21.32 ms (p95: 21.42) | -2.7 ms |
| Cloudflare | IPv6 | 23.38 ms (p95: 38.12) | 31.95 ms (p95: 34.34) | +8.6 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.
9e7083e0-bea8-4323-9da6-ce0245e97af2
Score History
Check History
Last 4 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
08 Aug 2026 18:30 UTC |
45 % | None | manual |
|
08 Aug 2026 11:03 UTC |
45 % | None | manual |
|
01 Aug 2026 02:57 UTC |
37 % | None | scheduled |
|
04 Jul 2026 03:47 UTC |
37 % | None | manual |