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

mailserver.xturbo.net.br · 177.52.104.21:443

Verified

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

Subject
CN=mailserver.xturbo.net.br
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-27T20:20:06+00:00
Expires
2027-01-25T20:20:05+00:00
Days remaining
81
Serial (hex)
053A4F602D63F2E60A57E926097F48408406
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:mailserver.xturbo.net.br

SHA-256 fingerprint

10:F0:56:7C:44:96:4C:61:63:D0:CC:63:9C:F7:A8:D4:0F:89:B2:5C:BA:B7:55:5B:49:2D:66:7A:4B:42:EE:F7
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
1D:C0:A7:03:FE:22:E4:82:4C:FC:63:44:7F:50:F0:2E:C4:AA:FA:18
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:mailserver.xturbo.net.br
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/7.crl
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 : Oct 27 21:18:36.724 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:B0:55:1F:20:3E:41:75:41:FC:06:7A: FB:6B:6F:E6:0B:D3:65:44:83:D2:39:4F:0A:A8:9A:1E: 3E:D7:27:13:E2:02:21:00:BD:9E:C1:AD:3E:68:B2:22: 4D:03:2E:50:31:D9:76:76:A1:07:5B:13:02:CA:4B:25: A3:43:8E:E3:47:57:53:7E Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Oct 27 21:18:37.088 2026 GMT Extensions: 00:00:05:00:2F:E1:30:04 Signature : ecdsa-with-SHA256 30:44:02:20:28:FC:5F:49:04:F7:11:F2:28:F3:0D:01: 1F:F5:E1:4E:B3:9E:08:22:22:A7:C7:FA:BC:61:2B:F2: 4F:FD:FB:D0:02:20:7A:A1:23:26:BE:A3:60:1E:A5:0F: 3E:C9:2E:94:BF:2E:F3:93:5C:4F:88:8F:EA:5A:D9:1B: 6B:3C:66:F9:3B:6A
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T23:37:41+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
668
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
2129
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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