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

mainzer-breitband.de · 193.25.234.222:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
C=DE ST=Rheinland-Pfalz L=Mainz O=Count + Care GmbH & Co. KG CN=*.mainzer-breitband.de
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Valid from
2026-09-14T00:00:00+00:00
Expires
2027-03-31T23:59:59+00:00
Days remaining
147
Serial (hex)
0CF88B084EBB80498E0A51C7BC824163
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:*.mainzer-breitband.de, DNS:mainzer-breitband.de

SHA-256 fingerprint

8C:22:78:E8:AF:CE:83:03:F6:79:14:71:6C:E2:7B:B1:DE:9C:0F:A7:6F:F5:C7:3C:90:E2:0A:0C:56:D1:94:92
Certificate extensions & PEM
authorityKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
subjectKeyIdentifier
08:BA:33:24:60:CC:3D:E5:E8:E6:50:E0:EB:C5:06:B5:1B:CB:9D:E7
subjectAltName
DNS:*.mainzer-breitband.de, DNS:mainzer-breitband.de
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://cdp.thawte.com/ThawteTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.thawte.com CA Issuers - URI:http://cacerts.thawte.com/ThawteTLSRSACAG1.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 : Sep 14 06:37:34.764 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:36:3B:80:A2:DC:8C:BD:40:36:4E:F1:27: D8:0C:5A:94:44:1C:55:5E:07:5A:19:68:EC:D6:D5:A3: 16:A5:D3:45:02:21:00:96:01:AD:AE:E1:32:1A:69:CD: FA:44:F7:F8:53:B0:CD:F7:D4:A4:D0:41:AC:D2:BF:62: 15:2F:D0:01:BC:7D:69 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Sep 14 06:37:34.748 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:79:B9:A2:C4:86:4A:7E:E5:E7:E8:65:69: E7:A1:D1:84:3C:FA:64:F3:23:AC:D6:82:4B:B7:20:7B: 6C:C7:95:AC:02:20:01:64:E5:EA:07:37:8A:78:8B:05: 5C:36:26:B2:F1:C9:AC:A4:60:91:B1:D1:3C:35:60:B6: E3:F2:21:7D:B0:2C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Sep 14 06:37:34.822 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:BE:F9:1D:C3:5B:E1:C9:CD:0B:F6:5B: 46:B0:36:71:8D:E1:6E:06:0F:83:08:BB:4C:65:0D:63: 5A:66:90:AE:8D:02:21:00:BC:3E:80:BE:A8:2A:03:F2: 18:DD:29:04:4C:21:B8:79:F7:95:79:67:09:CB:CE:93: 69:0F:97:F7:4A:FB:67:15
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T02:40:18+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=Thawte TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:24:25+00:00
Expires
2027-11-02T12:24:25+00:00
Days remaining
363
Serial (hex)
090EE8C5DE5BFA62D2AE2FF7097C4857
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4B:CC:5E:23:4F:E8:1E:DE:4E:AF:88:3A:A1:9C:31:33:5B:0B:26:E8:5E:06:6B:99:45:E4:CB:61:53:EB:20:C2
Certificate extensions & PEM
subjectKeyIdentifier
A5:8C:FE:32:CC:EB:0F:2C:D4:19:C6:08:B8:00:24:88:5D:C3:C5:B7
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: X509v3 Any Policy CPS: https://www.digicert.com/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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