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

TLSv1.2

virtualmaster.cz · 195.140.255.37:443

Verified

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

Subject
CN=virtualmaster.cz
Issuer
C=AT O=ZeroSSL GmbH CN=ZeroSSL RSA DV SSL CA 2
Valid from
2026-08-25T00:00:00+00:00
Expires
2026-11-23T23:59:59+00:00
Days remaining
39
Serial (hex)
80EFD692B9D0A45F3426D00166D68389
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:virtualmaster.cz, DNS:virtualmaster.eu, DNS:virtualmaster.net, DNS:www.virtualmaster.cz, DNS:www.virtualmaster.eu, DNS:www.virtualmaster.net

SHA-256 fingerprint

EF:91:33:ED:34:40:6F:D2:65:74:9C:53:09:83:21:4E:36:D8:B8:07:F7:9E:68:48:D3:81:47:68:C4:76:F8:48
Certificate extensions & PEM
authorityKeyIdentifier
4B:BE:FA:76:84:23:44:04:B9:CE:BE:31:6F:E9:F5:32:06:FF:0C:57
subjectKeyIdentifier
A4:45:F9:DB:AD:F7:55:1A:B7:D8:AD:02:58:23:07:43:5D:1A:CC:26
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/ZeroSSLRSADVSSLCA2.crt OCSP - URI:http://ocsp.sectigo.com
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Aug 25 00:20:19.634 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7A:B4:BD:C2:26:E4:BA:52:0D:E8:DE:D8: 13:79:51:E3:A8:10:C4:17:E7:F9:65:C5:4A:A8:F3:0A: DF:22:5F:94:02:21:00:B2:2A:8B:2A:10:37:0B:CE:69: 25:10:57:78:66:48:66:FA:1B:72:2E:A1:80:E1:7F:C5: 55:E6:F1:C4:14:F6:E3 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : Aug 25 00:20:19.627 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E0:1A:E4:DD:D3:52:F9:55:9A:A9:E8: 0D:AD:20:13:38:43:4D:BB:98:3C:B6:DA:1F:3D:61:6D: 21:9E:B8:B0:84:02:21:00:CF:9B:F1:70:35:3A:C5:0D: A4:F2:4D:A6:06:BE:5F:24:33:51:39:1E:DF:CC:43:D1: 70:0F:06:77:3E:EE:63:87
subjectAltName
DNS:virtualmaster.cz, DNS:virtualmaster.eu, DNS:virtualmaster.net, DNS:www.virtualmaster.cz, DNS:www.virtualmaster.eu, DNS:www.virtualmaster.net
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-10-15T03:54:11+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=AT O=ZeroSSL GmbH CN=ZeroSSL RSA DV SSL CA 2
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Valid from
2025-09-24T00:00:00+00:00
Expires
2035-09-23T23:59:59+00:00
Days remaining
3265
Serial (hex)
D0A908255F8E50E5F3396D1114702A37
Signature
RSA-SHA384
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

EC:9D:6B:CA:B9:81:8B:7D:D5:9E:D6:1D:A2:3A:65:8A:96:A9:C4:E9:50:ED:EE:0D:2D:A9:3E:7C:F2:17:47:80
Certificate extensions & PEM
authorityKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
subjectKeyIdentifier
4B:BE:FA:76:84:23:44:04:B9:CE:BE:31:6F:E9:F5:32:06:FF:0C:57
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.sectigo.com/SectigoPublicServerAuthenticationRootR46.crl
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationRootR46.p7c OCSP - URI:http://ocsp.sectigo.com
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication Root R46
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Valid from
2021-03-22T00:00:00+00:00
Expires
2038-01-18T23:59:59+00:00
Days remaining
4113
Serial (hex)
D27FBBC1DE359E5216AD6149586099C4
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

92:F3:51:BF:3D:54:16:4D:FA:8D:D8:F9:E1:13:9D:31:50:34:97:86:48:5D:2B:9E:EC:D0:0E:29:71:C1:E6:C5
Certificate extensions & PEM
authorityKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
subjectKeyIdentifier
56:73:58:64:95:F9:92:1A:B0:12:2A:04:62:79:A1:40:15:88:21:49
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.usertrust.com/USERTrustRSACertificationAuthority.crl
authorityInfoAccess
OCSP - URI:http://ocsp.usertrust.com
-----BEGIN CERTIFICATE-----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-----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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