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

fm-datacenter.de · 188.94.248.152:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `fm-datacenter.de'

Certificate verification failed

Subject
CN=*.mittwaldserver.info
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=RapidSSL TLS RSA CA G1
Valid from
2026-02-16T00:00:00+00:00
Expires
2027-03-19T23:59:59+00:00
Days remaining
136
Serial (hex)
036BA422C0FAA472B71FE85121426685
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:*.mittwaldserver.info, DNS:mittwaldserver.info

SHA-256 fingerprint

EE:62:0E:39:AA:91:0E:8A:F2:87:A5:28:47:C5:FD:62:E9:BF:81:6F:00:B1:C1:F6:99:A4:7C:9C:B5:66:23:9C
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
DB:AD:D2:61:D2:F9:1F:ED:57:B8:70:9D:35:4D:34:A2:9B:5A:DA:00
subjectAltName
DNS:*.mittwaldserver.info, DNS:mittwaldserver.info
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 : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Feb 16 08:54:29.193 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:25:CD:B9:6E:BA:19:33:50:29:B2:C5:C8: 20:B5:1D:F3:7D:D2:96:14:33:91:58:FA:1E:6D:BD:1B: 6E:C6:8F:09:02:20:50:A3:19:A9:22:75:97:2A:07:F4: BA:EF:4E:C8:FA:EB:1C:4C:C4:6D:4F:47:FD:CA:EF:7B: F0:03:A0:9F:6D:96 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 16 08:54:29.231 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:42:EA:F7:A4:85:B6:50:D8:42:50:D2:0B: E6:40:CE:A8:DC:76:71:7C:60:30:FD:D3:AA:FC:EC:EB: F8:08:4F:57:02:21:00:EC:35:F5:96:DC:06:5E:82:B0: 43:3B:F1:7D:4A:A5:68:60:22:D2:E4:5C:D5:A1:C8:33: 4D:1D:C5:9E:CB:8A:75 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 16 08:54:29.434 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:E9:73:B8:3C:7C:7D:23:63:9D:5F:B0: 58:60:7F:86:9E:53:77:9E:CF:20:B7:0F:0C:C5:D8:35: 5E:80:5C:73:B3:02:20:0B:A1:E4:F8:82:88:4F:D1:E7: CF:67:03:0D:77:F9:42:72:86:73:D4:FB:DC:D8:FE:32: 4C:6D:B0:07:68:FE:47
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-03T21:39:41+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
363
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

Registration / WHOIS →DNS records →