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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.sha.bi · 185.255.55.39:443

Verified

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

Subject
CN=mail.sha.bi
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-25T23:32:19+00:00
Expires
2026-12-24T23:32:18+00:00
Days remaining
65
Serial (hex)
06DA0048F2CA30569D9854C90D1EF2DCB9EE
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.sha.bi, DNS:autoconfig.xiufeng.de, DNS:autodiscover.sha.bi, DNS:autodiscover.xiufeng.de, DNS:mail.sha.bi

SHA-256 fingerprint

1A:DD:40:C7:97:A7:D1:BE:DA:2B:D2:96:C8:A2:8A:9B:DC:58:8A:B2:8C:4E:D9:A9:04:31:16:1A:FE:27:6F:E5
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
82:EB:27:40:87:26:41:35:90:CE:E9:9E:26:6B:D3:24:9A:74:C9:FC
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.sha.bi, DNS:autoconfig.xiufeng.de, DNS:autodiscover.sha.bi, DNS:autodiscover.xiufeng.de, DNS:mail.sha.bi
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/111.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Sep 26 00:30:49.485 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:36:4C:C8:6C:B9:6F:05:98:CC:C3:BC:2B: 6B:2B:1C:25:23:44:8C:6B:2F:3B:2F:09:0D:75:83:8E: DB:00:C4:68:02:21:00:E3:20:C6:53:E6:52:FC:69:7B: 5C:F2:F7:65:EE:E5:9D:C3:D7:88:5C:15:95:BB:92:A9: E5:28:BC:32:27:F5:44 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 26 00:30:47.001 2026 GMT Extensions: 00:00:05:00:46:83:30:28 Signature : ecdsa-with-SHA256 30:46:02:21:00:CF:E7:6B:EE:BB:E9:35:BC:69:15:5D: 63:E2:EC:18:A6:50:D3:73:56:67:46:2B:1D:88:9B:C4: 65:7C:D5:58:05:02:21:00:98:2E:E2:A9:03:9E:ED:9A: 82:12:16:D0:EC:61:8C:5B:91:19:28:28:AF:A2:FE:63: B7:D3:81:BE:3C:0D:86:B1
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-20T21:16:35+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
683
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
2144
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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