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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

add.si · 145.14.10.253:443

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

Certificate verification failed

Subject
CN=*.add.si
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-01-05T00:00:00+00:00
Expires
2027-01-28T23:59:59+00:00
Days remaining
101
Serial (hex)
8A407B322CBCA2E45DE6BE40FF3D6C17
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.add.si, DNS:add.si

SHA-256 fingerprint

3C:C9:AC:6C:0C:87:23:EC:19:A1:D2:5F:F6:20:32:E3:62:4A:07:B5:31:86:06:F0:36:2E:1E:16:9D:F7:71:25
Certificate extensions & PEM
authorityKeyIdentifier
68:C0:12:16:18:0E:AF:CE:F6:87:A6:32:57:A3:46:51:5D:CB:07:27
subjectKeyIdentifier
E8:57:D7:EE:F6:8F:68:22:CE:26:6A:21:C5:F1:95:A8:AD:CD:0C:EF
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication
certificatePolicies
Policy: 1.3.6.1.4.1.6449.1.2.2.7 CPS: https://sectigo.com/CPS Policy: 2.23.140.1.2.1
authorityInfoAccess
CA Issuers - URI:http://crt.sectigo.com/SectigoPublicServerAuthenticationCADVR36.crt OCSP - URI:http://ocsp.sectigo.com
subjectAltName
DNS:*.add.si, DNS:add.si
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 : Jan 5 09:01:12.733 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:80:E8:08:CD:F6:25:5C:3B:FB:93:D4: 23:B8:19:EB:94:85:F5:B2:3E:38:65:D8:ED:DE:34:2B: 7D:AB:26:EA:33:02:20:4D:46:C9:63:99:B6:A2:4D:FA: 78:3C:23:BE:59:99:A5:97:E3:CB:03:AC:B7:21:34:2F: C8:E3:DA:FF:CD:19:32 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 : Jan 5 09:01:13.186 2026 GMT Extensions: 00:00:05:00:01:12:20:80 Signature : ecdsa-with-SHA256 30:45:02:20:56:34:57:AB:D6:35:62:32:BE:F0:A3:93: 7D:4B:3E:03:81:EE:43:5A:A3:51:6B:BE:AA:38:C1:3E: 52:86:D9:8F:02:21:00:D8:56:DE:31:7A:E7:26:14:80: 90:FB:91:E7:7D:7B:B8:01:AB:4B:20:95:72:51:D5:8B: C1:17:A4:51:32:48:75 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 : Jan 5 09:01:12.650 2026 GMT Extensions: 00:00:05:00:00:07:DE:F7 Signature : ecdsa-with-SHA256 30:45:02:20:63:2E:F9:3F:24:6E:09:1A:B7:82:16:5B: AF:68:E2:52:75:33:04:B0:EE:47:E1:1F:B6:D5:96:E7: 17:F0:F7:F4:02:21:00:FD:C4:40:A0:5F:E2:15:C2:31: 8D:3B:E4:D2:89:04:75:45:AD:4A:36:2D:5D:7C:CE:71: 39:A0:96:10:8C:59:BB
-----BEGIN CERTIFICATE-----
MIIGeDCCBOCgAwIBAgIRAIpAezIsvKLkXea+QP89bBcwDQYJKoZIhvcNAQELBQAw
YDELMAkGA1UEBhMCR0IxGDAWBgNVBAoTD1NlY3RpZ28gTGltaXRlZDE3MDUGA1UE
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/Gsm6aSIsCtaRqmIWSCLDdGhSU40EZn1DVzWgu4SoeGjO9mW0udxdG2x2Rlx4vaL
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y1LOFxbi6/JZr9lJpOF7yoGZow+b/zRhySeJzA==
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-19T10:02:02+00:00

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

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