DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

comsource.cz · 185.45.201.64:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=*.comsource.cz
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2026-01-22T00:00:00+00:00
Expires
2027-02-22T23:59:59+00:00
Days remaining
149
Serial (hex)
0CCEA950AFDC9980F247443C96796F64
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.comsource.cz, DNS:comsource.cz

SHA-256 fingerprint

89:50:1B:04:E8:A6:02:28:5A:20:42:A7:86:5A:9E:45:67:8E:32:61:91:1C:6D:8B:20:7A:A4:70:77:BC:1F:AC
Certificate extensions & PEM
authorityKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
subjectKeyIdentifier
3F:E0:25:59:2A:FA:9F:CB:D2:5E:61:AF:CE:CB:7D:01:69:FD:17:65
subjectAltName
DNS:*.comsource.cz, DNS:comsource.cz
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://cdp.rapidssl.com/RapidSSLTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.rapidssl.com CA Issuers - URI:http://cacerts.rapidssl.com/RapidSSLTLSRSACAG1.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Jan 22 14:33:41.199 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:2D:CD:68:27:15:6D:CF:E4:7E:05:FA:F2: C9:24:75:D6:7E:96:CD:D0:6D:61:C4:94:5C:67:46:05: 68:6F:B1:CF:02:21:00:E5:D0:45:D3:BE:9F:DA:7E:F5: 0B:40:89:2F:7B:86:CA:C1:F8:DD:60:44:B6:F0:7A:CC: 37:45:EE:20:BB:F7:80 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Jan 22 14:33:41.222 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:87:57:E7:25:97:69:9C:A5:30:AD:A3: 03:69:7D:B8:AA:B1:39:35:D3:3B:24:26:35:20:27:E7: 2D:DF:06:67:CB:02:21:00:9B:37:A1:5D:79:99:05:B3: BA:6D:F4:D8:E2:E9:67:F8:F1:16:E5:84:33:8E:38:E0: 9C:7F:A0:D7:6E:79:0D:AC Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 60:4C:9A:AF:7A:7F:77:5F:01:D4:06:FC:92:0D:C8:99: EB:0B:1C:7D:F8:C9:52:1B:FA:FA:17:77:3B:97:8B:C9 Timestamp : Jan 22 14:33:41.417 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:B4:24:60:09:08:12:3F:84:EA:F3:2E: F7:AF:37:C5:84:45:32:A6:41:56:58:A2:03:65:08:10: B8:38:FB:AC:2D:02:20:18:9E:B4:E4:DC:43:AF:24:45: A0:A3:C0:06:BD:02:05:BF:44:E9:89:87:64:54:EC:03: 82:6D:98:E0:3B:E9:D0
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-26T18:36:44+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:33+00:00
Expires
2027-11-02T12:24:33+00:00
Days remaining
401
Serial (hex)
0B259422CED9812A15A04E99528A0EFA
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

44:22:E9:63:EE:53:CD:58:CC:9F:85:CD:40:BF:5F:FE:C0:09:5F:DF:1A:15:45:35:66:1C:1C:06:BC:AD:C6:9B
Certificate extensions & PEM
subjectKeyIdentifier
0C:DB:6C:82:49:0F:4A:67:0A:B8:14:EE:7A:C4:48:52:88:EB:56:38
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.1.1 CPS: https://www.digicert.com/CPS Policy: 2.16.840.1.114412.1.2 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2
-----BEGIN CERTIFICATE-----
MIIEszCCA5ugAwIBAgIQCyWUIs7ZgSoVoE6ZUooO+jANBgkqhkiG9w0BAQsFADBh
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
d3cuZGlnaWNlcnQuY29tMSAwHgYDVQQDExdEaWdpQ2VydCBHbG9iYWwgUm9vdCBH
MjAeFw0xNzExMDIxMjI0MzNaFw0yNzExMDIxMjI0MzNaMGAxCzAJBgNVBAYTAlVT
MRUwEwYDVQQKEwxEaWdpQ2VydCBJbmMxGTAXBgNVBAsTEHd3dy5kaWdpY2VydC5j
b20xHzAdBgNVBAMTFlJhcGlkU1NMIFRMUyBSU0EgQ0EgRzEwggEiMA0GCSqGSIb3
DQEBAQUAA4IBDwAwggEKAoIBAQC/uVklRBI1FuJdUEkFCuDL/I3aJQiaZ6aibRHj
ap/ap9zy1aYNrphe7YcaNwMoPsZvXDR+hNJOo9gbgOYVTPq8gXc84I75YKOHiVA4
NrJJQZ6p2sJQyqx60HkEIjzIN+1LQLfXTlpuznToOa1hyTD0yyitFyOYwURM+/CI
8FNFMpBhw22hpeAQkOOLmsqT5QZJYeik7qlvn8gfD+XdDnk3kkuuu0eG+vuyrSGr
5uX5LRhFWlv1zFQDch/EKmd163m6z/ycx/qLa9zyvILc7cQpb+k7TLra9WE17YPS
n9ANjG+ECo9PDW3N9lwhKQCNvw1gGoguyCQu7HE7BnW8eSSFAgMBAAGjggFmMIIB
YjAdBgNVHQ4EFgQUDNtsgkkPSmcKuBTuesRIUojrVjgwHwYDVR0jBBgwFoAUTiJU
IBiV5uNu5g/6+rkS7QYXjzkwDgYDVR0PAQH/BAQDAgGGMB0GA1UdJQQWMBQGCCsG
AQUFBwMBBggrBgEFBQcDAjASBgNVHRMBAf8ECDAGAQH/AgEAMDQGCCsGAQUFBwEB
BCgwJjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMEIGA1Ud
HwQ7MDkwN6A1oDOGMWh0dHA6Ly9jcmwzLmRpZ2ljZXJ0LmNvbS9EaWdpQ2VydEds
b2JhbFJvb3RHMi5jcmwwYwYDVR0gBFwwWjA3BglghkgBhv1sAQEwKjAoBggrBgEF
BQcCARYcaHR0cHM6Ly93d3cuZGlnaWNlcnQuY29tL0NQUzALBglghkgBhv1sAQIw
CAYGZ4EMAQIBMAgGBmeBDAECAjANBgkqhkiG9w0BAQsFAAOCAQEAGUSlOb4K3Wtm
SlbmE50UYBHXM0SKXPqHMzk6XQUpCheF/4qU8aOhajsyRQFDV1ih/uPIg7YHRtFi
CTq4G+zb43X1T77nJgSOI9pq/TqCwtukZ7u9VLL3JAq3Wdy2moKLvvC8tVmRzkAe
0xQCkRKIjbBG80MSyDX/R4uYgj6ZiNT/Zg6GI6RofgqgpDdssLc0XIRQEotxIZcK
zP3pGJ9FCbMHmMLLyuBd+uCWvVcF2ogYAawufChS/PT61D9rqzPRS5I2uqa3tmIT
44JhJgWhBnFMb7AGQkvNq9KNS9dd3GWc17H/dXa1enoxzWjE0hBdFjxPhUb0W3wi
8o34/m8Fxw==
-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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