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SSL Checker

Submit the Hostname and Port in the fields below. This checker supports SNI and STARTTLS.

Report

Hostname: Matches Common Name or/and SAN
Expired: No (344 days till expiration)
Public Key: We were unable to find any issues in the public key of end-entity certificate
Trusted: Yes, we were able to verify the certificate
Self-Signed: No, the end-entity certificate is not self-signed
Chain Issues: No, we were unable to detect any issues in the certificate chain sent by the server
Weak signatures: No, certificates sent by the server were not signed utilizing a weak hash function
OCSP Status: OCSP Responder returned "good" status for the end-entity certificate

DNS Information

Resolves To: 82.113.108.15
Reverse IP lookup: www.o2online.de.
Nameserver: ns1.o2online.de.
Nameserver: ns3.o2online.de.
Nameserver: ns2.o2online.de.

General Information

Common Name: *.o2online.de
SANs: DNS:*.o2online.deDNS:o2.deDNS:*.o2.deDNS:o2online.deDNS:*.m.o2online.deDNS:*.dsl.o2online.deDNS:*.o2now.deDNS:*.o9.deDNS:o2business.deDNS:*.o2business.deDNS:blau.deDNS:*.blau.deDNS:*.whatsappsim.deDNS:*.ayyildiz.deDNS:*.telefonica.deDNS:*.nettokom.deDNS:*.ortelmobile.deDNS:*.alditalk-kundenbetreuung.deDNS:*.mobileconnect.telefonica.deDNS:*.dsl.o2.de Total number of SANs: 20
Organization: Telefónica Germany GmbH & Co. OHG
Locality: München
Signature Algorithm: sha256WithRSAEncryption
Key Type: RSA
Key size: 2048 bits
Serial Number: 2b8bd809f04886d3aa35da9555ba40d
Not Before: Mar 04, 2024 00:00:00 GMT
Not After: Mar 07, 2025 23:59:59 GMT
Number of certs: 2
Revocation Status: good
OCSP Stapling: Not Supported
Server: Apache
HSTS: Not Supported
HPKP: Not Supported

Chain Information

Certificate # 1 - Common Name: *.o2online.de

Decode this certificate for verbose information →
Subject Common Name *.o2online.de
Subject Organization Telefónica Germany GmbH & Co. OHG
Issuer Common Name DigiCert Global G2 TLS RSA SHA256 2020 CA1
Issuer Organization DigiCert Inc
Not Before: Mar 04, 2024 00:00:00 GMT
Not After: Mar 07, 2025 23:59:59 GMT
Signature Algorithm: sha256WithRSAEncryption
Serial Number: 2b8bd809f04886d3aa35da9555ba40d
SHA1 Fingerprint: DD:1D:49:E5:29:6B:40:FF:9D:ED:55:89:CE:2B:AE:38:0A:B7:37:97
MD5 Fingerprint: CF:CD:3A:CE:BB:0E:33:9A:75:AC:73:9D:DE:40:9B:96

Certificate # 2 - Common Name: DigiCert Global G2 TLS RSA SHA256 2020 CA1

Decode this certificate for verbose information →
In place? Yes, this certificate directly certifies the preceding one
Subject Common Name DigiCert Global G2 TLS RSA SHA256 2020 CA1
Subject Organization DigiCert Inc
Issuer Common Name DigiCert Global Root G2
Issuer Organization DigiCert Inc
Not Before: Mar 30, 2021 00:00:00 GMT
Not After: Mar 29, 2031 23:59:59 GMT
Signature Algorithm: sha256WithRSAEncryption
Serial Number: cf5bd062b5602f47ab8502c23ccf066
SHA1 Fingerprint: 1B:51:1A:BE:AD:59:C6:CE:20:70:77:C0:BF:0E:00:43:B1:38:26:12
MD5 Fingerprint: 21:14:C6:BF:5B:E1:5E:FD:DD:3C:F6:A5:F9:43:EE:8A

OpenSSL Handshake

depth=2 C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root G2
verify return:1
depth=1 C = US, O = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1
verify return:1
depth=0 C = DE, L = M\C3\BCnchen, O = Telef\C3\B3nica Germany GmbH & Co. OHG, CN = *.o2online.de
verify return:1
CONNECTED(00000003)
OCSP response: no response sent
---
Certificate chain
 0 s:C = DE, L = M\C3\BCnchen, O = Telef\C3\B3nica Germany GmbH & Co. OHG, CN = *.o2online.de
   i:C = US, O = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1
-----BEGIN CERTIFICATE-----
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JEjiIGq8TdZJaoN0kGOhd9OwBsAqGqYI1FQ5Pd/Xkglm65qm
-----END CERTIFICATE-----
 1 s:C = US, O = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1
   i:C = US, O = DigiCert Inc, OU = www.digicert.com, CN = DigiCert Global Root G2
-----BEGIN CERTIFICATE-----
MIIEyDCCA7CgAwIBAgIQDPW9BitWAvR6uFAsI8zwZjANBgkqhkiG9w0BAQsFADBh
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JCqVJUzKoZHm1Lesh3Sz8W2jmdv51b2EQJ8HmA==
-----END CERTIFICATE-----
---
Server certificate
subject=C = DE, L = M\C3\BCnchen, O = Telef\C3\B3nica Germany GmbH & Co. OHG, CN = *.o2online.de

issuer=C = US, O = DigiCert Inc, CN = DigiCert Global G2 TLS RSA SHA256 2020 CA1

---
No client certificate CA names sent
Peer signing digest: SHA256
Peer signature type: RSA-PSS
Server Temp Key: X25519, 253 bits
---
SSL handshake has read 3825 bytes and written 386 bytes
Verification: OK
---
New, TLSv1.3, Cipher is TLS_AES_128_GCM_SHA256
Server public key is 2048 bit
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
Early data was not sent
Verify return code: 0 (ok)
---
DONE