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

dns.xserver.cloud · 193.203.50.254:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`*.app.xserver.cloud' did not match expected CN=`dns.xserver.cloud'

Certificate verification failed

Subject
CN=*.app.xserver.cloud
Issuer
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Valid from
2026-02-10T13:38:09+00:00
Expires
2027-02-10T13:38:08+00:00
Days remaining
135
Serial (hex)
7F4E7F75ACA5FD542CA4871B679162F3
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.app.xserver.cloud, DNS:app.xserver.cloud

SHA-256 fingerprint

FE:6F:70:6D:19:0D:A7:05:4B:2E:59:94:EF:B4:12:FF:79:20:D3:E8:52:CE:46:57:3E:51:EE:54:F3:ED:65:1D
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://certumdvtlsg2r39ca.crl.certum.pl/certumdvtlsg2r39ca.crl
authorityInfoAccess
OCSP - URI:http://certumdvtlsg2r39ca.ocsp-certum.com CA Issuers - URI:http://certumdvtlsg2r39ca.repository.certum.pl/certumdvtlsg2r39ca.cer
authorityKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.101.1
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.app.xserver.cloud, DNS:app.xserver.cloud
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Feb 10 13:38:29.633 2026 GMT Extensions: 00:00:05:00:00:24:EE:22 Signature : ecdsa-with-SHA256 30:44:02:20:22:CA:F5:4E:DE:3C:A7:5B:23:18:4A:12: 04:0C:EF:1C:47:18:00:AC:90:4E:EB:CC:F8:D7:3D:FB: E3:E9:07:19:02:20:26:8B:25:5B:E1:26:54:A9:D6:7A: 60:85:5D:E8:8C:06:E0:52:D5:BB:4B:66:2B:01:48:1C: 55:5F:52:95:F0:0C 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 : Feb 10 13:38:29.483 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:FA:D9:87:41:E5:76:83:2D:55:25:54: 3A:F2:1C:71:58:89:4D:0A:BA:3B:24:39:60:81:F5:CA: AA:85:1D:BC:BB:02:20:2F:B1:66:12:56:0B:F2:87:C1: 4F:6A:F0:F1:48:93:DA:69:3C:9F:06:C7:58:E9:17:15: CB:0A:0C:A7:7B:03:02 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 : Feb 10 13:38:29.654 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E8:44:F1:5C:22:8C:2C:10:23:9D:52: 82:3B:DC:27:D5:89:CB:65:31:BA:F1:CC:6A:8C:08:50: 18:3D:8F:DF:6C:02:20:2C:09:B1:A4:93:8E:78:20:C0: 78:F0:92:EB:84:1F:F5:FD:DE:59:2F:A1:20:71:FB:8C: C5:A7:8E:45:3B:D6:35
-----BEGIN CERTIFICATE-----
MIIHKzCCBROgAwIBAgIQf05/dayl/VQspIcbZ5Fi8zANBgkqhkiG9w0BAQsFADBS
MQswCQYDVQQGEwJQTDEhMB8GA1UECgwYQXNzZWNvIERhdGEgU3lzdGVtcyBTLkEu
MSAwHgYDVQQDDBdDZXJ0dW0gRFYgVExTIEcyIFIzOSBDQTAeFw0yNjAyMTAxMzM4
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IpNq0STa3gaFrLhKJ1PpBvUcXr6jctQt8yBnVkrCStL8Zsj0YuX1ZRBDtGgDSASc
cJxg3OHsEE1uHaGQgHKebZWiss3Ts/aXm2odU7FXfMlpzxPmsSRXKLsgB+jPaWip
d44U+LSMfDa1OUfDGlF+COF6qZwt6o237q+VjI4DBFwFEWU/mbNlBCcqBTKdqrPF
i6gpAgMBAAGjggMvMIIDKzAMBgNVHRMBAf8EAjAAME8GA1UdHwRIMEYwRKBCoECG
Pmh0dHA6Ly9jZXJ0dW1kdnRsc2cycjM5Y2EuY3JsLmNlcnR1bS5wbC9jZXJ0dW1k
dnRsc2cycjM5Y2EuY3JsMIGaBggrBgEFBQcBAQSBjTCBijA1BggrBgEFBQcwAYYp
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MB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAOBgNVHQ8BAf8EBAMCBaAw
MQYDVR0RBCowKIITKi5hcHAueHNlcnZlci5jbG91ZIIRYXBwLnhzZXJ2ZXIuY2xv
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dugIPdqHOwEIOCgUPO5ZAAABnEfGYoEACAAABQAAJO4iBAMARjBEAiAiyvVO3jyn
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AZxHxmHrAAAEAwBHMEUCIQD62YdB5XaDLVUlVDryHHFYiU0KujskOWCB9cqqhR28
uwIgL7FmElYL8ofBT2rw8UiT2mk8nwbHWOkXFcsKDKd7AwIAdgBgTJqven93XwHU
BvySDciZ6wscffjJUhv6+hd3O5eLyQAAAZxHxmKWAAAEAwBHMEUCIQDoRPFcIows
ECOdUoI73CfVictlMbrxzGqMCFAYPY/fbAIgLAmxpJOOeCDAePCS64Qf9f3eWS+h
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AHK0qBfwD9T/WNOkKUQx7kh14hT6vtit2ukpmG1npdrYImFtsltbTJ3QMSigjK9r
IzQBlusTLvUQ9WvZa5BcyyQcXXeH8oP0fH6WVqD8SylTAei0p6QZGMKbMOW8GqRo
/Z4X1laE0Wy5uRyZNZH9jhvHbGXw7yVPYe+1U2M+TG34W1EB1iYkw+ZTioWnd9mh
j7DLqtRJTRqmHrAx8ESGhwRU7kZk8yjIeRJ9zm28Y/aamCbENpyCMMCg1CfQdiTD
V0xDgQsfiIfmIekwbLiL0g5aWLGPWdkHXReXw2gIoX5ItHFkNSbh6304KZKMnpMP
Z1zoYnaykqPQpuSmevEfLieC9xAu42B/m4lXka3wCr+pjvwhXYUI3Vu+RiDyowKN
Ob9Xd9u0FObgP1MXq1RC755m9fB7YgdYaeDP3z7KxiouPEbGSy6HhOnQz4rf+Mbi
+tppYNtjGLFr+ydlu1sLGAaPw5zqWXUa9muu3mwUx+BshaZoFbnh6DTZGyXRSlZK
IZc2JWtan9XmZfBfk7rk
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-27T21:21:55+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=PL O=Asseco Data Systems S.A. CN=Certum DV TLS G2 R39 CA
Issuer
C=PL O=Asseco Data Systems S.A. OU=Certum Certification Authority CN=Certum Trusted Root CA
Valid from
2024-06-18T07:41:22+00:00
Expires
2039-06-05T07:41:22+00:00
Days remaining
4633
Serial (hex)
A82DD9E5DCAFDF13205E70043E6B95A8
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

83:C0:A5:A7:68:44:C8:40:DF:AF:82:0F:FD:02:AD:F6:57:3A:26:82:3E:F6:AF:75:8A:33:84:A0:AC:04:40:83
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://subca.repository.certum.pl/ctrca.cer OCSP - URI:http://subca.ocsp-certum.com
authorityKeyIdentifier
8C:FB:1C:75:BC:02:D3:9F:4E:2E:48:D9:F9:60:54:AA:C4:B3:4F:FA
basicConstraints
CA:TRUE, pathlen:0
crlDistributionPoints
Full Name: URI:http://subca.crl.certum.pl/ctrca.crl
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
keyUsage
Certificate Sign, CRL Sign
certificatePolicies
Policy: X509v3 Any Policy
subjectKeyIdentifier
33:A8:77:B7:01:38:6F:5F:1F:24:24:A2:1E:6C:14:E3:6E:22:03:DF
-----BEGIN CERTIFICATE-----
MIIGnTCCBIWgAwIBAgIRAKgt2eXcr98TIF5wBD5rlagwDQYJKoZIhvcNAQENBQAw
ejELMAkGA1UEBhMCUEwxITAfBgNVBAoTGEFzc2VjbyBEYXRhIFN5c3RlbXMgUy5B
LjEnMCUGA1UECxMeQ2VydHVtIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MR8wHQYD
VQQDExZDZXJ0dW0gVHJ1c3RlZCBSb290IENBMB4XDTI0MDYxODA3NDEyMloXDTM5
MDYwNTA3NDEyMlowUjELMAkGA1UEBhMCUEwxITAfBgNVBAoMGEFzc2VjbyBEYXRh
IFN5c3RlbXMgUy5BLjEgMB4GA1UEAwwXQ2VydHVtIERWIFRMUyBHMiBSMzkgQ0Ew
ggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCo52NXEXWoO2w6zQeBtNer
d5ahhe8RgM8XVpwGEFoovjHc4K+Cp3auUWVlt7/ARthJoxOttF+jaSrlSve9mWnm
TJOo1QLuoOTWuZ9XUkMjDG1ztTbFsgRqQyOtZsDqniHD79wqD49DQW4geVslp9/L
iTQKUpPawtAwpBeoaRXL8RJ8xjNA+2bEr6vesz2MEvvhpWBSWNAIR5O5YbiLztQ9
KdOuBYS0CW59ptuCjg3AuLcp8aOjk9z/kJc8xKkO48hLTp+HpdHkuI+iFWZn0aCL
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H5o7DtoGiWXvcRKYpGtWt9czdUa1edSk5mTrwZGEXLAkX1ECiAq4GS5vEGjrEQ1u
x8mag2LDh7ZnXdcyzkKZKGsx7uExe3Nx5gWWZMXFrZ5v+uxynKogHUY2vdIMB3dn
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PtYwxP1nNpxwBgtIPoTk6wIDAQABo4IBRDCCAUAwcQYIKwYBBQUHAQEEZTBjMDcG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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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