SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

rtc.com.br

SSL/TLS Certificate

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SSL/TLS Certificate for rtc.com.br

Expired
Issued by (CA)
Let's Encrypt
Subject
*.rtc.com.br
Valid from
Mar 23, 2026
Valid until
Jun 21, 2026 (expired 31 days ago)
Public key
RSA 2048-bit
Serial
053D2314BD02A50384FD2D36FE729739D438
SHA-256 fingerprint
D6:8C:8A:C4:B8:D7:7B:5C:E6:E3:17:0E:B9:CC:92:2F:55:0D:72:B3:8F:24:47:1A:81:F2:B2:71:CE:FE:A0:18
Chain
R13 → ISRG Root X1
Subject Alternative Names (2)
*.rtc.com.br, rtc.com.br

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.