~/tools / ssl-checker
SSL Checker
Check SSL certificate expiry, chain validity, TLS version and cipher. Catches expired certs, weak crypto and chain issues.
[ ERROR ]
Certificate expired 15 days ago. Renew immediately.
── output ─────
- Issued to
- ops-redir.t-mobile.nl
- Issued by
- DigiCert Global G2 TLS RSA SHA256 2020 CA1
- Valid from
- 2025-04-07
- Valid until
- 2026-04-06 (-15 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384
- Key
- RSA · 4096 bit
- Signature
- sha256WithRSAEncryption
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- D8:E0:6A:FE:42:51:9D:14:92:99:14:BC:5F:7B:47:68:61:43:97:01:BB:64:72:A6:3E:5F:A2:74:D2:8F:1A:19
- Serial
- 0BA718311160EB3DD5A51F6F0AADDA41
subject_alt_names · 5
ops-redir.t-mobile.nl
t-mobile.nl
www.t-mobile.nl
capi.t-mobile.nl
publicservices.t-mobile.nl
certificate_chain · 2 certs
[ leaf ]ops-redir.t-mobile.nl
-15 days left
issuer: DigiCert Global G2 TLS RSA SHA256 2020 CA1
2025-04-07 → 2026-04-06
[ inter ]DigiCert Global G2 TLS RSA SHA256 2020 CA1
1803 days left
issuer: DigiCert Global Root G2
2021-03-30 → 2031-03-29