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

mx.strejda.net · 77.95.40.34:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate CN=`*.ji.cz' did not match expected CN=`mx.strejda.net'

Certificate verification failed

Subject
CN=*.ji.cz
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2026-05-15T00:00:00+00:00
Expires
2026-11-29T23:59:59+00:00
Days remaining
64
Serial (hex)
0AF7DDC1A78B54514C6ED8CB6354D57A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.ji.cz, DNS:ji.cz

SHA-256 fingerprint

5A:EA:9A:37:46:7D:3B:C8:E1:F5:23:3B:3D:7B:E7:6E:49:D0:07:E4:FF:47:BC:2B:29:BE:A2:41:EB:E5:E6:E7
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
38:5C:1F:71:CC:14:03:63:8E:A8:EE:CA:B1:1C:30:A2:C2:3B:57:62
subjectAltName
DNS:*.ji.cz, DNS:ji.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 : 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 : May 15 15:22:59.920 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:AB:24:1C:7E:2E:73:EA:8A:5B:28:78: AB:2A:A7:BF:29:61:7E:E0:8B:9F:DE:32:8B:F6:F1:42: F3:C8:8D:20:87:02:21:00:90:67:4B:53:FF:27:F9:C2: 63:3F:64:0F:D9:81:CC:11:75:2C:2D:DA:59:0B:47:9B: 11:33:CF:09:D6:57:F0:46 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 : May 15 15:22:59.929 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:31:08:F5:3B:00:FF:BE:51:15:B5:76:E3: D6:2E:FE:BF:12:83:33:48:9E:FE:7E:2A:D3:B3:61:F0: 0C:D7:EB:8D:02:20:24:35:C6:A7:58:9C:EC:2F:D3:16: F9:F6:B8:42:C5:DE:8E:45:13:1E:97:63:D5:1E:8C:64: 2C:3F:51:C8:EB:A5 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 : May 15 15:22:59.934 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:52:A7:33:CF:33:0C:D3:47:F9:DF:23:E4: FD:EC:39:A5:51:4F:75:8E:AE:DB:8A:CC:E8:D8:00:2C: C5:52:97:CC:02:20:7A:14:B1:6D:50:3B:0E:BA:DC:BD: F4:8C:B2:F6:0E:1A:79:50:4C:52:85:FE:E4:90:C0:BC: A7:4B:1A:EB:04:2E
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-26T09:08:27+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
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-----

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

View certificate JSON

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