~/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 119 more days.
── output ─────
- Issued to
- natwest.com
- Issued by
- COMODO RSA Organization Validation Secure Server CA
- Valid from
- 2025-08-18
- Valid until
- 2026-08-18 (119 days)
- TLS version
- TLSv1.3
- Cipher
- TLS_AES_256_GCM_SHA384
- Key
- RSA · 2048 bit
- Signature
- sha256WithRSAEncryption
- Forward secrecy
- yes
- Self-signed
- no
- Must-staple
- no
- SHA-256 fingerprint
- 38:6D:68:39:D8:75:8D:CD:60:AD:5C:76:20:F9:EB:B3:2C:F7:92:49:80:23:DE:94:CA:8C:3F:3D:8B:73:EC:96
- Serial
- 1A7183ACBA727C424971BAD7257EA5E2
subject_alt_names · 5
natwest.com
corporate.natwest.com
natwest.co.uk
www.natwest.co.uk
www.natwest.com
certificate_chain · 3 certs
[ leaf ]natwest.com
119 days left
issuer: COMODO RSA Organization Validation Secure Server CA
2025-08-18 → 2026-08-18
[ inter ]COMODO RSA Organization Validation Secure Server CA
1027 days left
issuer: COMODO RSA Certification Authority
2014-02-12 → 2029-02-11
[ root ]COMODO RSA Certification Authority
4290 days left
issuer: COMODO RSA Certification Authority
2010-01-19 → 2038-01-18