IPv4 Addresses Detected
103.16.182.3
103.16.183.3
Network Information
WHOISIPv4 Network
- Organization
- Universiti Sultan Zainal Abidin
- Country
- MY
- ASN
- AS58812 USZA-AS Information Technology Center, MY
- Network
- 103.16.182.0/23
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 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 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).
✓ 103.16.182.3, 103.16.183.3
Website reachable on port 80 when connecting via IPv4.
✓ HTTP (port 80) responds over IPv4 — 367ms TTFB.
Website reachable on port 443 when connecting via IPv4.
✓ HTTPS (port 443) responds over IPv4 — 336ms 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 | 17.81 ms (p95: 18.9) | 7.84 ms (p95: 9.08) | -10 ms |
| IPv4 | 16.57 ms (p95: 48.67) | 45.93 ms (p95: 295.64) | +29.4 ms | |
| IPv6 | 46.24 ms (p95: 55.86) | 55.45 ms (p95: 63.93) | +9.2 ms | |
| Cloudflare | IPv4 | 9.82 ms (p95: 18.76) | 9.01 ms (p95: 19.15) | -0.8 ms |
| Cloudflare | IPv6 | 53.84 ms (p95: 87.8) | 23.69 ms (p95: 48.55) | -30.2 ms |
Score History
Check History
Last 6 checks
| Date | Score | Status | Triggered By |
|---|---|---|---|
|
07 Mar 2026 01:12 UTC |
32 % | Partial | manual |
|
06 Mar 2026 19:05 UTC |
32 % | Partial | manual |
|
06 Mar 2026 17:47 UTC |
32 % | Partial | manual |
|
06 Mar 2026 17:21 UTC |
32 % | Partial | manual |
|
06 Mar 2026 11:30 UTC |
32 % | Partial | manual |
|
04 Mar 2026 03:15 UTC |
32 % | Partial | manual |