~/tools / ssl-checker
SSL Checker
Check SSL certificate expiry, chain validity, TLS version and cipher. Catches expired certs, weak crypto and chain issues.
[ OK ]
Valid for 324 more days.
── output ─────
- Issued to
- www.telekom.de
- Issued by
- Amazon ECDSA 384 M01
- Valid from
- 2026-02-10
- Valid until
- 2027-03-11 (324 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_128_GCM_SHA256
- Key
- EC (secp384r1) · 384 bit
- Signature
- ecdsa-with-SHA384
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- 85:E4:09:D4:BE:66:98:34:F6:1A:AE:48:5A:49:76:9A:FF:F3:AC:86:37:E7:8F:A2:2F:BB:AE:22:D0:60:8F:B7
- Serial
- 0E817909C269D2E47A4CB159E061EB60
subject_alt_names · 2
www.telekom.de
telekom.de
certificate_chain · 3 certs
[ leaf ]www.telekom.de
324 days left
issuer: Amazon ECDSA 384 M01
2026-02-10 → 2027-03-11
[ inter ]Amazon ECDSA 384 M01
1585 days left
issuer: Amazon Root CA 4
2022-08-23 → 2030-08-23
[ inter ]Amazon Root CA 4
4271 days left
issuer: Starfield Services Root Certificate Authority - G2
2015-05-25 → 2037-12-31