SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
hafslund-it.com
SSL/TLS Certificate
SSL/TLS Certificate for hafslund-it.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- apps.gresvig.no
- Valid from
- Jun 16, 2026
- Valid until
- Sep 14, 2026 (45 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 05BB722FE73B71E32BEA1B3D7FF12166DE5A
- SHA-256 fingerprint
- 71:1B:F9:B7:FD:2F:3C:73:6C:91:1D:4A:F2:BC:B4:C2:B8:17:AC:5E:92:C6:46:F1:9F:DB:DB:44:40:1E:95:0C
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by hafslund-it.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch hafslund-it.com 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.