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.x-ion.de · 138.201.207.72:443

Verified

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

Subject
CN=mail.x-ion.de
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-11T22:32:27+00:00
Expires
2027-01-09T22:32:26+00:00
Days remaining
84
Serial (hex)
05620D59C6E9B8579DCB0F2FDFBCECBF1314
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.bv-immo.de, DNS:autoconfig.tvsr.de, DNS:autoconfig.xcloud.eu, DNS:autodiscover.bv-immo.de, DNS:autodiscover.tvsr.de, DNS:autodiscover.xcloud.eu, DNS:mail.x-ion.de

SHA-256 fingerprint

3E:6E:EF:B1:AF:CD:F1:00:32:9B:06:B9:55:2E:66:4B:39:64:4B:F1:C4:F6:DC:7C:BE:69:F2:8E:52:21:65:D5
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
52:9C:57:C9:36:1E:B3:17:C1:1E:F0:75:95:E5:B7:17:21:46:60:10
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:autoconfig.bv-immo.de, DNS:autoconfig.tvsr.de, DNS:autoconfig.xcloud.eu, DNS:autodiscover.bv-immo.de, DNS:autodiscover.tvsr.de, DNS:autodiscover.xcloud.eu, DNS:mail.x-ion.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/21.crl
ct_precert_scts
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 : Oct 11 23:30:57.567 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:FB:B8:F5:9C:FB:CD:3F:29:47:39:F8: 06:C8:1F:D3:89:87:D5:38:ED:02:9E:45:63:3F:31:B1: D6:CF:AC:64:95:02:21:00:ED:EB:A8:2E:43:A8:50:09: D3:2C:E9:0E:C4:FD:94:9E:7C:4D:D7:FB:51:3C:42:83: 0A:07:9D:70:9A:8E:CA:75 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Oct 11 23:30:57.753 2026 GMT Extensions: 00:00:05:00:0B:5E:22:45 Signature : ecdsa-with-SHA256 30:44:02:20:69:80:FE:55:8C:5D:3A:D8:EB:1C:10:E6: A2:20:4E:4B:69:D3:71:61:C5:DC:BE:6B:F4:BC:7C:02: FF:76:5A:2C:02:20:50:01:B0:35:A0:75:B2:43:86:5E: E6:F5:30:CF:85:99:54:FC:90:E5:BC:17:E2:1C:C7:04: 5B:FA:EE:FD:BB:DE
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-17T07:00:29+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
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
686
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
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
2147
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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