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

mail.prohosting24.de · 45.142.115.116:443

Verified

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

Subject
CN=mail.prohosting24.de
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-19T12:59:08+00:00
Expires
2026-12-18T12:59:07+00:00
Days remaining
80
Serial (hex)
069B8C8FCDC5CB825F08EB7C8AF5588771AD
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.csnj.de, DNS:autoconfig.nicolas-janzen.de, DNS:autoconfig.prohosting24.de, DNS:autodiscover.csnj.de, DNS:autodiscover.nicolas-janzen.de, DNS:autodiscover.prohosting24.de, DNS:mail.prohosting24.de

SHA-256 fingerprint

E3:CD:FC:64:B9:E1:C3:E6:B9:A9:4C:08:91:F6:36:99:22:95:0C:68:08:E0:C3:F7:46:EA:35:C2:2F:BC:09:80
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
B2:B0:3C:8E:9B:8D:BF:6F:0E:F9:D4:6B:FF:36:EF:43:30:0B:1D:2A
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:autoconfig.csnj.de, DNS:autoconfig.nicolas-janzen.de, DNS:autoconfig.prohosting24.de, DNS:autodiscover.csnj.de, DNS:autodiscover.nicolas-janzen.de, DNS:autodiscover.prohosting24.de, DNS:mail.prohosting24.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/46.crl
ct_precert_scts
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 : Sep 19 13:57:38.913 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:57:24:A6:A6:E2:36:06:C3:5A:97:5E:F8: B5:1D:09:58:66:8F:79:F6:5C:B0:5F:1A:56:B1:3F:C2: D1:93:93:C7:02:21:00:A9:C6:00:AE:56:8F:41:34:C9: 45:40:F7:DB:2B:BA:5A:5F:11:99:04:C5:BB:D1:BD:7F: A5:C4:B6:5E:C2:BC:12 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37: 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23 Timestamp : Sep 19 13:57:36.501 2026 GMT Extensions: 00:00:05:00:43:F8:C0:C1 Signature : ecdsa-with-SHA256 30:46:02:21:00:DF:22:22:F7:24:84:3C:C8:CC:C8:8B: E5:24:14:14:17:D2:C6:88:63:58:30:D9:BA:52:6D:9C: 0B:26:55:13:77:02:21:00:C8:F3:8A:53:8C:E0:F6:B8: A4:C5:35:9E:DF:68:CC:2F:04:F6:95:25:08:57:13:2F: EF:94:AA:64:08:2C:19:B7
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T06:06:05+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
704
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2165
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----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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