SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for alu-s.se
Valid- Issued by (CA)
- Google Trust Services
- Subject
- alu-s.se
- Valid from
- Aug 2, 2026
- Valid until
- Oct 31, 2026 (77 days remaining)
- Public key
- EC 256-bit
- Serial
- 2A19683F5A7D3A2A0E70FA3669A0FBD3
- SHA-256 fingerprint
- A0:AF:97:83:66:86:C7:19:BB:91:D4:8B:D1:E2:7E:91:28:02:27:CD:3B:25:6F:95:A2:71:01:13:A5:6A:B4:3E
- Chain
- WE1 → GTS Root R4
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by alu-s.se's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch alu-s.se continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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