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

zero.net.ar · 200.50.160.220:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed
The certificate has expired.

Certificate verification failed

Subject
CN=zero.net.ar
Issuer
C=US O=Let's Encrypt CN=R13
Valid from
2026-04-27T20:11:47+00:00
Expires
2026-07-26T20:11:46+00:00
Days remaining
-75
Serial (hex)
05FC3F0CAA1E0B28772904403AAEE1827370
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.zero.net.ar, DNS:zero.net.ar

SHA-256 fingerprint

8C:A5:0F:1E:0D:99:87:5F:FB:20:BC:96:78:48:1A:FE:25:FA:BB:C5:FD:1D:18:28:3E:04:B6:C9:AE:9E:4E:26
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
C4:93:A8:C2:69:0A:3E:DC:B0:26:FA:8D:12:77:D0:AF:EC:E3:AB:15
authorityKeyIdentifier
E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
authorityInfoAccess
CA Issuers - URI:http://r13.i.lencr.org/
subjectAltName
DNS:*.zero.net.ar, DNS:zero.net.ar
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r13.c.lencr.org/113.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 : Apr 27 21:10:17.733 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:43:02:20:7F:CF:47:F1:B6:FB:FE:C7:C9:D6:F7:99: 27:B5:A2:52:57:F2:0D:81:84:3F:8A:CE:B5:6E:15:07: AA:97:CA:2A:02:1F:19:A6:0E:69:BD:90:E8:47:07:BA: 31:96:8C:4D:46:39:BE:2A:B1:8E:8F:7A:BC:82:3F:DC: 59:C9:08:C9:09 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Apr 27 21:10:18.700 2026 GMT Extensions: 00:00:05:00:0C:A9:CD:30 Signature : ecdsa-with-SHA256 30:44:02:20:10:D6:A1:09:BD:B3:8B:91:DB:32:D9:AE: EA:CD:2D:E5:44:02:6E:89:8D:EA:B5:CF:1E:AB:92:76: C5:45:4C:3E:02:20:03:B5:37:03:27:68:5B:C2:D6:8B: 91:6E:47:85:35:7F:5B:0C:60:38:78:32:04:2C:EF:B0: E9:9A:CC:2D:D5:D4
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-09T05:06:06+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R13
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2024-03-13T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
154
Serial (hex)
5A00F212D8D4B480F3924157EA298305
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

D3:B1:28:21:6A:84:3F:8E:F1:32:15:01:F5:DF:52:A5:DF:52:93:9E:E2:C1:92:97:71:2C:D3:DE:4D:41:93:54
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
E7:AB:9F:0F:2C:33:A0:53:D3:5E:4F:78:C8:B2:84:0E:3B:D6:92:33
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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