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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

dnsbackup.net · 195.181.251.21:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`*.nameserver.sk' did not match expected CN=`dnsbackup.net'
The certificate expires within 30 days.

Certificate verification failed

Subject
CN=*.nameserver.sk
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2026-04-10T00:00:00+00:00
Expires
2026-10-25T23:59:59+00:00
Days remaining
29
Serial (hex)
024164CFFC55275BD84EB91B4311130B
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.nameserver.sk, DNS:nameserver.sk

SHA-256 fingerprint

F9:C1:48:2E:7C:7A:0A:B3:73:AE:7D:D2:00:8D:C8:10:AE:0B:0E:69:FB:EA:1B:F7:06:EF:98:CC:70:EC:0B:00
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
93:90:27:AF:AD:E0:38:93:8E:9C:FC:8B:3B:C8:C6:FB:BD:21:F9:D3
subjectAltName
DNS:*.nameserver.sk, DNS:nameserver.sk
certificatePolicies
Policy: 2.23.140.1.2.1 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client 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 : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Apr 10 09:44:04.105 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:07:C8:C0:F9:C2:48:A1:43:D1:2A:A0:46: 60:CC:1C:42:8D:12:8E:C8:73:60:07:C9:64:6E:A8:A0: 56:C8:C4:6A:02:20:1A:55:CF:FF:B9:1E:3D:9E:4B:F7: 3E:D0:B3:0B:28:59:36:C4:A9:40:8A:1F:D7:FF:F4:4C: A0:9B:A7:DE:09:90 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Apr 10 09:44:04.153 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F9:B5:E4:C6:8E:7A:2E:FD:8B:C7:64: 8B:79:B2:A9:96:FF:21:E3:B8:FD:33:78:29:5F:A5:8A: DA:29:F3:E9:73:02:20:5F:E0:C4:B3:78:86:D5:D9:50: 58:70:54:94:8F:9A:AF:1C:4F:F4:85:D5:F5:8D:24:DE: 8F:50:C7:4E:20:E2:38 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Apr 10 09:44:04.124 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:EF:15:B6:B1:35:90:E7:3A:60:B6:A6: 25:82:E8:05:68:87:E6:BA:7B:7B:42:A2:65:F4:78:DD: 53:94:05:31:64:02:21:00:80:42:9E:54:53:0C:2B:B2: 75:16:65:AB:8B:DE:12:A9:90:CC:26:68:63:F9:5A:B1: 01:D9:37:B9:D6:F2:67:F9
-----BEGIN CERTIFICATE-----
MIIGLTCCBRWgAwIBAgIQAkFkz/xVJ1vYTrkbQxETCzANBgkqhkiG9w0BAQsFADBg
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
d3cuZGlnaWNlcnQuY29tMR8wHQYDVQQDExZSYXBpZFNTTCBUTFMgUlNBIENBIEcx
MB4XDTI2MDQxMDAwMDAwMFoXDTI2MTAyNTIzNTk1OVowGjEYMBYGA1UEAwwPKi5u
YW1lc2VydmVyLnNrMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1L6H
3f7JXOMcIFZXNTcIlkmjebPFDq/pVoV4kLLSFSsAm6XGw1YRB67qE9uPwgl3eIeT
Hp8CdlQ+M2zc0kSx8QzDZkFi1hGcPG6xs/8lJPHzQcyEMxGL+1HD5NHFk3kIexUb
cbpR3VxBc6zVadWjlEIyqcwI5LFtaTzLFMjZVxCdO2/JpyRY7dxgCHTTbb9/xZtW
wCR64bqQxUgP2/OuAK8J+M90dxpCEUkmn298PktT2UL+kB24wtRsb2JFj4N5Gqqc
NN3xZo30R9QgfIg40xt9rJHhIBBd6r1OnNSwVscjx9TzatJqpcZ71SIwvXuGoMfM
Ul/6rz7UggozIv1kgwIDAQABo4IDJzCCAyMwHwYDVR0jBBgwFoAUDNtsgkkPSmcK
uBTuesRIUojrVjgwHQYDVR0OBBYEFJOQJ6+t4DiTjpz8izvIxvu9IfnTMCkGA1Ud
EQQiMCCCDyoubmFtZXNlcnZlci5za4INbmFtZXNlcnZlci5zazA+BgNVHSAENzA1
MDMGBmeBDAECATApMCcGCCsGAQUFBwIBFhtodHRwOi8vd3d3LmRpZ2ljZXJ0LmNv
bS9DUFMwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF
BQcDAjA/BgNVHR8EODA2MDSgMqAwhi5odHRwOi8vY2RwLnJhcGlkc3NsLmNvbS9S
YXBpZFNTTFRMU1JTQUNBRzEuY3JsMHYGCCsGAQUFBwEBBGowaDAmBggrBgEFBQcw
AYYaaHR0cDovL3N0YXR1cy5yYXBpZHNzbC5jb20wPgYIKwYBBQUHMAKGMmh0dHA6
Ly9jYWNlcnRzLnJhcGlkc3NsLmNvbS9SYXBpZFNTTFRMU1JTQUNBRzEuY3J0MAwG
A1UdEwEB/wQCMAAwggF+BgorBgEEAdZ5AgQCBIIBbgSCAWoBaAB1AMIxfldFGaNF
7n843rKQQevHwiFaIr9/1bWtdprZDlLNAAABnXbG9wkAAAQDAEYwRAIgB8jA+cJI
oUPRKqBGYMwcQo0SjshzYAfJZG6ooFbIxGoCIBpVz/+5Hj2eS/c+0LMLKFk2xKlA
ih/X//RMoJun3gmQAHYA2AlVO5RPev/IFhlvlE+Fq7D4/F6HVSYPFdEucrtFSxQA
AAGddsb3OQAABAMARzBFAiEA+bXkxo56Lv2Lx2SLebKplv8h47j9M3gpX6WK2inz
6XMCIF/gxLN4htXZUFhwVJSPmq8cT/SF1fWNJN6PUMdOIOI4AHcAlE5Dh/rswe+B
8xkkJqgYZQHH0184AgE/cmd9VTcuGdgAAAGddsb3HAAABAMASDBGAiEA7xW2sTWQ
5zpgtqYlgugFaIfmunt7QqJl9HjdU5QFMWQCIQCAQp5UUwwrsnUWZauL3hKpkMwm
aGP5WrEB2Te51vJn+TANBgkqhkiG9w0BAQsFAAOCAQEAiLfxJq3vQ975BJruAqC+
6cQB9rs3MJKuLWuet1dqLZ/ANXBgl/fZiXW0SB2pvW8Dl0iEMCRJqnAGFfkIb/YV
dID9VHTKdVv7SvWk6Uwd+PvBvU0VK0vvi1eFM8qZ4cDL5L0nwQBmi4TYULLoTg9y
zBu64wuPXoeXhdfDE6qf21SVkc8PxaDY9s4RXxwev8zX872Asvtaubnum9ZRf7vJ
OsaITzcMHT1ygk1ChIMXmI5bT8yC7FRzr61T8XALiAiBgfm7LySnyRuW7yBa80D2
eEdxBHlJkYgQ0QVqsicOK9tEkDKk/7EZaD3dQiyS3ZHbD94mJ+WASkxadSdL9D91
TQ==
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-26T02:35:49+00:00

Server-presented chain · 2 additional certificates

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
402
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-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2013-08-01T12:00:00+00:00
Expires
2038-01-15T12:00:00+00:00
Days remaining
4129
Serial (hex)
033AF1E6A711A9A0BB2864B11D09FAE5
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

CB:3C:CB:B7:60:31:E5:E0:13:8F:8D:D3:9A:23:F9:DE:47:FF:C3:5E:43:C1:14:4C:EA:27:D4:6A:5A:B1:CB:5F
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
subjectKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
-----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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