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

microhost.pl · 188.210.221.51:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=*.microhost.pl
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Domain Validation CA SHA2
Valid from
2020-08-04T10:02:24+00:00
Expires
2022-08-04T10:02:24+00:00
Days remaining
-1523
Serial (hex)
0E012E5F609473BE784501B52FC45609
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.microhost.pl, DNS:microhost.pl

SHA-256 fingerprint

73:DB:90:90:FF:3B:F1:AF:18:92:0F:91:87:5B:09:D2:12:36:2B:8B:4E:6E:CE:BC:E3:6B:F1:88:B4:69:27:EC
Certificate extensions & PEM
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/dvcasha2.crl
authorityInfoAccess
OCSP - URI:http://dvcasha2.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/dvcasha2.cer
authorityKeyIdentifier
E5:31:AD:BF:3A:11:96:F4:83:BC:50:3C:D4:B7:90:9B:90:EE:DE:25
subjectKeyIdentifier
D7:D9:6C:BF:01:64:A0:B1:F7:15:5E:02:44:B6:63:CA:C1:04:94:2C
issuerAltName
email:dvcasha2@certum.pl
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.2.616.1.113527.2.5.1.3 CPS: https://www.certum.pl/CPS
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
subjectAltName
DNS:*.microhost.pl, DNS:microhost.pl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 55:81:D4:C2:16:90:36:01:4A:EA:0B:9B:57:3C:53:F0: C0:E4:38:78:70:25:08:17:2F:A3:AA:1D:07:13:D3:0C Timestamp : Aug 4 10:02:25.513 2020 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:AE:28:92:A1:95:4D:FC:81:4C:44:CC: 96:D5:A5:04:B9:D2:00:50:6D:97:87:13:B5:11:A9:AE: 2A:E0:02:DE:C7:02:21:00:96:28:EA:CC:BE:86:2D:A9: DA:B3:BE:95:FF:D3:2C:9E:25:15:86:93:28:0C:8D:92: 02:C0:D6:32:1C:CD:39:48 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6F:53:76:AC:31:F0:31:19:D8:99:00:A4:51:15:FF:77: 15:1C:11:D9:02:C1:00:29:06:8D:B2:08:9A:37:D9:13 Timestamp : Aug 4 10:02:25.768 2020 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9F:84:93:66:0C:44:08:8B:3A:E0:D6: 79:D4:63:8D:CA:C4:3B:99:70:15:A9:7E:A3:C8:B0:42: 03:CA:E1:DC:24:02:21:00:E9:10:36:A5:D5:93:CC:2A: A3:1D:EE:24:F6:5F:BA:E1:3C:00:85:58:F8:8F:AB:78: F1:64:26:5F:6D:A1:CE:5E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A5:55:EB:75:FA:91:20:30:B5:A2:89:69:F4:F3:7D: 11:2C:41:74:BE:FD:49:B8:85:AB:F2:FC:70:FE:6D:47 Timestamp : Aug 4 10:02:25.830 2020 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:75:D6:1F:53:45:09:52:9A:D7:B0:4E:84: 8E:95:24:DB:4B:F3:17:27:FA:CE:55:F2:EB:1A:99:2B: EA:57:18:E8:02:21:00:A1:99:78:15:2F:20:05:C3:D4: 16:B2:0D:AE:72:E5:2E:04:1C:24:BB:60:4D:C1:37:56: 01:13:31:BE:22:8D:4A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-04T16:37:36+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Issuer
C=PL O=Unizeto Sp. z o.o. CN=Certum CA
Valid from
2008-10-22T12:07:37+00:00
Expires
2027-06-10T10:46:39+00:00
Days remaining
248
Serial (hex)
939285400165715F947F288FEFC99B28
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

94:94:24:DC:2C:CA:AB:5E:9E:80:D6:6E:0E:3F:7D:EE:B3:20:1C:60:7D:43:15:EF:4C:6F:2D:93:A9:17:27:9D
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
08:76:CD:CB:07:FF:24:F6:C5:CD:ED:BB:90:BC:E2:84:37:46:75:F7
authorityKeyIdentifier
DirName:/C=PL/O=Unizeto Sp. z o.o./CN=Certum CA serial:01:00:20
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/ca.crl
authorityInfoAccess
OCSP - URI:http://subca.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/ca.cer
certificatePolicies
Policy: X509v3 Any Policy CPS: http://www.certum.pl/CPS
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Domain Validation CA SHA2
Issuer
C=PL O=Unizeto Technologies S.A. OU=Certum Certification Authority CN=Certum Trusted Network CA
Valid from
2014-09-11T12:00:00+00:00
Expires
2027-06-09T10:46:39+00:00
Days remaining
247
Serial (hex)
26DDD22B46C9C44D5A694D39807E72AD
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

12:9F:B5:DE:50:1E:24:04:1C:D1:4A:81:07:5F:D1:CD:E2:57:40:8D:4A:35:3E:63:69:12:E3:8B:DD:A2:D3:FB
Certificate extensions & PEM
basicConstraints
CA:TRUE
subjectKeyIdentifier
E5:31:AD:BF:3A:11:96:F4:83:BC:50:3C:D4:B7:90:9B:90:EE:DE:25
authorityKeyIdentifier
08:76:CD:CB:07:FF:24:F6:C5:CD:ED:BB:90:BC:E2:84:37:46:75:F7
keyUsage
Certificate Sign, CRL Sign
crlDistributionPoints
Full Name: URI:http://crl.certum.pl/ctnca.crl
authorityInfoAccess
OCSP - URI:http://subca.ocsp-certum.com CA Issuers - URI:http://repository.certum.pl/ctnca.cer
certificatePolicies
Policy: X509v3 Any Policy CPS: http://www.certum.pl/CPS
-----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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