TLS/SSL certificate check


Port to connect on:
Secure HTTP / HTTPS - port 443 Secured SMTP - port 465 Secured IMAP - port 993 Secured POP3 - port 995

TLS/SSL check of 'stackoverflow.com (172.64.155.249)'

Multiple A-records!

The domain 'stackoverflow.com' has severals A/AAAA-records - and thereby multiple IP's to check.

click to use
104.18.32.7

Summary


Host:
stackoverflow.com, 172.64.155.249, port 443


Protocols:
All good
 2 supported protocols: TLS 1.3, TLS 1.2


Certificate:
All good
 Certificate 'stackoverflow.com' is verified okay. Issued by 'E1'. Expires 11-06-2024.

Protocol support



Protocol support:
TLS 1.3
Supported
TLS 1.2
Supported
TLS 1.1
No support
TLS 1.0
No support
SSL 3.0
No support
SSL 2.0
No support

Verification:
TLS 1.3 is supported
 

Chain of certificates

3 of 3 - End-Entity
stackoverflow.com

Certificat:
stackoverflow.com

Issued by:
E1, Let's Encrypt, US

Valid:
From 13-03-2024 to 11-06-2024

Verification:
Certificate is verified okay

SAN's:
*.stackoverflow.com
stackoverflow.com

Key:
ECC
Signature algorithm:
sha384ECDSA

Serial:
040904FD21E5322E49F2E406A06099067852

PEM format:
Click to see certificate as PEM (modal)

2 of 3 - Intermediate
E1

Certificat:
E1, Let's Encrypt, US

Issued by:
ISRG Root X2, Internet Security Research Group, US

Valid:
From 03-09-2020 to 15-09-2025

Verification:
Certificate is verified okay

Key:
ECC
Signature algorithm:
sha384ECDSA

Serial:
00B3BDDFF8A7845BBCE903A04135B34A45

PEM format:
Click to see certificate as PEM (modal)

1 of 3 - Root certificate
ISRG Root X2

Certificat:
ISRG Root X2, Internet Security Research Group, US

Issued by:
ISRG Root X2, Internet Security Research Group, US

Valid:
From 03-09-2020 to 17-09-2040

Verification:
Certificate is verified okay

Key:
ECC
Signature algorithm:
sha384ECDSA

Serial:
41D29DD172EAEEA780C12C6CE92F8752

PEM format:
Click to see certificate as PEM (modal)

Root Store trust

Root Certificat:
ISRG Root X2
Issued by:
Internet Security Research Group

Root Store trust:
The root certificte is trustet by ALL major trusted root certificate stores

Microsoft:
Root Certificate is fully trusted by Microsoft (Windows)

Apple:
Root Certificate is fully is trusted by Apple (iOS, iPadOS, macOS)

Android:
Root Certificate is fully is trusted by Android

API

You may perform this lookup using the API and get the results as easy-to-parse JSON data.

Read more on the API at https://iamroot.tech/about/api (regarding authentication and rate limits, among other things), or give it a go right away using the 'try it' button.

 
GET
 https://iamroot.tech/ssl-certificate-check/api/?host=stackoverflow.com+(172.64.155.249) copy try it
 

Log

066+066
  • Host 'stackoverflow.com' resolved in 65ms
066+000
  • INFMultiple A-records!
    Domain 'stackoverflow.com' has several A-records, and thereby multiple IPs to check. IP 172.64.155.249 will be used.
066+000
  • Check protocols
066+000
  • Start SSL 2.0 protocol check, stackoverflow.com (172.64.155.249), port 443
066+000
  • Start TLS 1.1 protocol check, stackoverflow.com (172.64.155.249), port 443
066+000
  • Start TLS 1.3 protocol check, stackoverflow.com (172.64.155.249), port 443
066+000
  • Start TLS 1.2 protocol check, stackoverflow.com (172.64.155.249), port 443
067+000
  • Start SSL 3.0 protocol check, stackoverflow.com (172.64.155.249), port 443
067+000
  • Start TLS 1.0 protocol check, stackoverflow.com (172.64.155.249), port 443
076+010
  • Protocol check of SSL 2.0 done in 9ms - failed
    Unable to authenticate connection using SSL 2.0
076+009
  • Protocol check of SSL 3.0 done in 9ms - failed
    Unable to authenticate connection using SSL 3.0
085+019
  • Protocol check of TLS 1.1 done in 18ms - failed
    Unable to authenticate connection using TLS 1.1
085+018
  • Protocol check of TLS 1.0 done in 18ms - failed
    Unable to authenticate connection using TLS 1.0
098+031
  • Protocol check of TLS 1.3 done in 31ms - all good
104+038
  • Protocol check of TLS 1.2 done in 37ms - all good
105+029
  • TLS 1.3 is supported
105+000
  • Done
105+000
  • Check certificate
105+000
  • Load and verify chain of certificates
254+149
  • Full chain of certificates has been loaded and verified in 149ms.
254+000
  • End-Entity certificate verification success
    Certificat 'stackoverflow.com' SUCCEDED the verification.
254+000
  • Host 'stackoverflow.com' is matching Subject/SAN 'stackoverflow.com' of certificate. All good!
254+000
  • Intermediate certificate verification success
    Certificat 'E1' SUCCEDED the verification.
254+000
  • Root certificate verification success
    Certificat 'ISRG Root X2' SUCCEDED the verification.
254+000
  • Check root store status of root certificate
256+002
  • Trustet by all major trusted root certificate stores
    The root certificte is trustet by ALL major trusted root certificate stores
256+000
  • Done
256+000
  • Done
256+000
  • Done