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.vhost.vn · 103.27.60.2:443

Verified

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

Subject
CN=mail.vhost.vn
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-14T02:58:56+00:00
Expires
2027-01-12T02:58:55+00:00
Days remaining
79
Serial (hex)
06445E70CA42B7734020B32621D0B9C95008
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.uyennhu.net, DNS:autoconfig.vhost.vn, DNS:autodiscover.uyennhu.net, DNS:autodiscover.vhost.vn, DNS:mail.uyennhu.net, DNS:mail.vhost.vn, DNS:mta-sts.vhost.vn

SHA-256 fingerprint

54:EE:E2:F6:CA:C5:B0:A3:D1:1C:1C:64:05:88:7C:B6:B5:A5:42:0F:BB:AB:35:DF:37:83:E2:7C:85:06:17:B2
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
DB:F0:04:91:6E:B8:A3:37:0B:61:0A:E9:9D:DD:1A:23:A6:4D:83:74
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.uyennhu.net, DNS:autoconfig.vhost.vn, DNS:autodiscover.uyennhu.net, DNS:autodiscover.vhost.vn, DNS:mail.uyennhu.net, DNS:mail.vhost.vn, DNS:mta-sts.vhost.vn
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/9.crl
ct_precert_scts
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 : Oct 14 03:57:27.307 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:36:8B:4F:6C:40:53:2A:9A:DD:46:C8:5C: 6D:3E:BD:B6:47:5D:88:05:3A:97:F2:1A:A9:CB:11:D8: D2:6D:0E:74:02:20:53:0C:7F:AD:D4:3B:C3:B0:57:4D: 65:F1:8A:EA:6C:D8:97:1C:F0:4F:7A:5A:44:B0:AA:44: EF:DA:46:B0:18:06 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Oct 14 03:57:27.724 2026 GMT Extensions: 00:00:05:00:23:41:9D:3D Signature : ecdsa-with-SHA256 30:45:02:20:42:9A:9D:8E:A4:AF:B1:50:A5:32:08:85: 4C:D9:49:07:4D:D3:DA:6F:9D:C6:31:6F:6E:0C:E6:6C: 8B:23:D2:C1:02:21:00:ED:98:5A:E7:68:DC:CC:DC:58: 42:78:58:D0:FF:EB:B8:9D:C5:75:DB:10:EE:01:45:FD: 0C:C8:46:01:36:25:54
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-24T18:53:40+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
679
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-----
MIIE2zCCAsOgAwIBAgIRAKICU/FfJpHAXcHOE7m8yk4wDQYJKoZIhvcNAQELBQAw
LjELMAkGA1UEBhMCVVMxDTALBgNVBAoTBElTUkcxEDAOBgNVBAMTB1Jvb3QgWVIw
HhcNMjUwOTAzMDAwMDAwWhcNMjgwOTAyMjM1OTU5WjAzMQswCQYDVQQGEwJVUzEW
MBQGA1UEChMNTGV0J3MgRW5jcnlwdDEMMAoGA1UEAxMDWVIxMIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoVi8X2xCYgMXvJxNPKp/oF13UMgmPABB07VC
LNDtoXmt9luEZNJSBV10VyT1Pz6LD8Zq1d2gc43WNl1AdRrj4sEnazbOiz0nPpmG
Bp2hui49oZtDIY6wdKeZAi5BbNU20CH6RSBBMLSQ9cXrH8dxdv4PAJ45ssGML68U
SE3BsjC2a6cAN9L5CgXVIQi5tfNiTPoFZZ3S0OlXqLmmtdV95udWAb5b6e/F49Di
CsH0Y00Ag72BVIb1hzynmKe+X0mERBTtsb3BwmpV9ipeBjMLoR/D9cHxHQCWoi5l
TmXwY015J5rGelz1nZjJuxc2kioaX29XJBnhMkP531rSdG5uMwIDAQABo4HuMIHr
MA4GA1UdDwEB/wQEAwIBhjATBgNVHSUEDDAKBggrBgEFBQcDATASBgNVHRMBAf8E
CDAGAQH/AgEAMB0GA1UdDgQWBBQfLzW+RhSCzUCxrnksVXj699Ro+zAfBgNVHSME
GDAWgBTe51tg0CJtQCh9Pw0B/qS1UrRRlDAyBggrBgEFBQcBAQQmMCQwIgYIKwYB
BQUHMAKGFmh0dHA6Ly95ci5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwB
AgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3lyLmMubGVuY3Iub3JnLzANBgkq
hkiG9w0BAQsFAAOCAgEA0+zvMq3kHig1ddTmmm+RibTr9/RpX7k4buanMMRqbV/y
IvP82zAHN3mvaw+cASuVsdpd0ikjhr4hnhJQLQOzOp2ccKrsdGOAgo0vddeISFAq
EWEV4lmUM3vFF796up+bSgmJ1u6RupDCMxDgF8M3eLvGuj6L0lu3zkQ0KuQLnKxL
tB0oQqn1Idg5CuuGpMvQzk29Pa3D/qHurc0EIM9SxukQuJqq63lxsYyRQFU8yMBO
hq1w5LbfaWNRrz1uklOfI/pYkAb2E2MTZrAMQkBIE2S8Jt1F8gRc96o/xOsrgvSk
a84AisX6xq1lz1Z7jGvrnXc4TMcjxZTjiTaihcYI1JIXZiLtEMSCa5l3cu8YWd6z
dLRQlqRdclVjuQfNHawRJ6GWlkK0QJosivTKwdBw3KxEtzGo8yMHERbsy57gP1UX
HOMcmZYQC0gtyR3SxfenIM/MxC3Ia2Ypab/kQ/CTnlIn2KQ5JUC6NYrGCbhFN9bp
5lKJStEwCUnLpntcrXk5XVDCNv/5RyWpRThkGOV7GetKkQ0qAY8hCzWK6oqnAhDZ
cjlYVdWfqOw3DIOX6EDNBgAqHarRVxyF9QZdOaXSyPJ0ueD2BYJEBgaCGQ8rAaU/
Qc123V5LTXDZW4CcsPBDyhy4v+c8hClAyw/IkJlfBqxB9D+/wvIMHgECZ4ptP6o=
-----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
2140
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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