Issued by TC TrustCenter Class 2 L1 CA XI

About this certificate

This digital certificate with serial number 06:c7:00:01:00:02:28:31:9e:e4:aa:43:0f:bb was issued on by TC TrustCenter GmbH .

This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.

Cerificate errors/warnings *beta

  • WARNING: Certificate contains unknown extension ([2.16.840.1.113730.1.1])
  • ERROR: Certificate [key too small: 1024]
  • ERROR: Certificate doesn't contain any subjectAltName
  • ERROR: Certificate CN is not listed in subjectAltName

adesso AG

Organization: adesso AG
Organization unit: IT-Betrieb
State / Province: Nordrhein-Westfalen
Locality: Dortmund
Country: DE

TC TrustCenter GmbH

Organization: TC TrustCenter GmbH
Organization unit: TC TrustCenter Class 2 L1 CA
State / Province: Nordrhein-Westfalen
Locality: Dortmund
Country: DE

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 06:c7:00:01:00:02:28:31:9e:e4:aa:43:0f:bb
Serial Number (int): 137460863171214235098315669835707
Serial Number lenght: 107 bits, 14 octets

SubjectKeyId: bf:9d:b3:8e:a3:f9:6a:38:3e:c2:1c:0a:2c:ff:5c:dc:3c:0e:3a:89
AuthorityKeyId: 66:b3:c6:91:f9:b6:cd:b2:5f:9a:37:56:46:0c:e2:6b:d5:b1:7c:b4

Fingerprint (sha1): 65:d3:ac:3f:67:62:d8:38:8b:76:2a:2a:77:ad:e1:0c:50:80:9e:08
Fingerprint (sha256): df:2e:ec:b7:f1:92:44:29:3a:26:f8:0b:9b:6b:54:ab:ac:bc:d2:0e:46:49:d6:cf:39:77:0c:87:d6:3a:ef:14

Issuing Certificate URL: http://www.trustcenter.de/certservices/cacerts/tc_class2_L1_CA_XI.crt

Revocation information

OCSP Server: http://ocsp.xi.tcclass2-ii.trustcenter.de
CRL Distribution Point: http://crl.xi.tcclass2-ii.trustcenter.de/crl/v2/tc_class2_L1_CA_XI.crl

Check the revocation status for the current certificate on www.drebis.com
DNS Names
Email Addresses
IP Addresses

Advanced Certificate Properties

Technical details about this certificate

Public Key Algorithm


Key Size


Signature Algorithm

SHA1 with RSA

Key Usage

Digital Signature
Content Commitment
Key Encipherment
Data Encipherment

Extended Key Usages

Server Authentication
Client Authentication


10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names