SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
half-life2.com
SSL/TLS Certificate
SSL/TLS Certificate for half-life2.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- steamcommunity.com
- Valid from
- Jul 14, 2026
- Valid until
- Oct 12, 2026 (77 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0597F75C676838290C8A6EF08EDCDEB152A0
- SHA-256 fingerprint
- D1:43:08:32:BB:C3:26:73:24:2F:0B:B2:62:CF:C1:72:77:C3:09:92:C0:8D:DF:D7:05:F5:CE:A5:DB:81:73:BE
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (digicert.com, letsencrypt.org).
Never get surprised by half-life2.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch half-life2.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.
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