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

TLSv1.2

mx1.tagorg.com · 89.28.217.121:443

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=*.tago.org
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2026-05-19T00:00:00+00:00
Expires
2026-12-03T23:59:59+00:00
Days remaining
68
Serial (hex)
B517F634571983A54D75A5CFC49FB30F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.tago.org, DNS:tago.org

SHA-256 fingerprint

88:C0:B2:F2:22:22:D6:3C:D9:12:6B:E5:32:68:04:76:1B:23:7E:F6:4D:2F:2A:CC:EE:E0:40:17:6B:71:09:D0
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
2A:0E:B4:BF:74:6F:94:0C:0D:FF:B1:FB:F4:83:53:7E:FF:9D:7F:C8
keyUsage
Digital Signature, Key Encipherment
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client 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:*.tago.org, DNS:tago.org
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : May 19 06:37:57.027 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:58:E0:67:0E:24:D3:77:6E:5F:DE:6F:89: F8:AD:D1:12:D1:4D:64:90:AB:C8:D1:0E:CD:08:7D:49: 43:61:59:4C:02:21:00:B1:30:DF:9C:CA:77:1F:76:B5: 6F:C8:6E:FC:70:3E:99:99:1F:BF:12:3A:AA:20:B1:83: DD:54:AC:E8:1C:17:C4 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : May 19 06:37:57.077 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:E7:53:1F:7F:5E:01:75:27:DB:9E:B3: A9:2E:49:9F:1A:BA:43:61:CB:BB:66:87:54:66:6D:3A: F2:CC:6D:96:C7:02:21:00:89:20:59:85:9D:44:0F:0F: BD:CD:3B:6C:0E:E6:0D:F9:93:24:72:8D:50:83:63:F3: 35:E1:5D:E6:BF:28:0E:9F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 6C:FE:50:19:43:A8:5E:A9:16:BC:52:D1:33:E4:DC:C9: 1E:F1:41:1C:7D:25:84:20:D1:73:80:9E:18:18:EB:3A Timestamp : May 19 06:37:57.150 2026 GMT Extensions: 00:00:05:00:0C:3A:66:B5 Signature : ecdsa-with-SHA256 30:45:02:21:00:FC:95:AE:59:91:E4:7F:92:A5:98:5F: 9E:51:1B:D1:4F:E5:86:68:79:B8:7E:89:3A:F2:73:E0: 7F:7A:12:23:09:02:20:49:D7:62:0B:38:7B:F9:F4:96: 3B:30:F8:23:63:8C:A5:BC:69:E3:07:A7:26:71:91:ED: 20:E1:E8:ED:D5:2F:95
-----BEGIN CERTIFICATE-----
MIIGgTCCBOmgAwIBAgIRALUX9jRXGYOlTXWlz8Sfsw8wDQYJKoZIhvcNAQELBQAw
YDELMAkGA1UEBhMCR0IxGDAWBgNVBAoTD1NlY3RpZ28gTGltaXRlZDE3MDUGA1UE
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If+A4SsT9hfkuU6aIlv1iVsDC3PMj7toe2YnOza4dNCkA/bq+2Q4UcNuTxe0MCn8
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BH6DZVxyUNSOa1Q6WWBZd6v4DL+Bbxg2Fztf2P77KIRi32gGKjhCJydWScNID4aF
N9qpYUixQYrrpkrYXlWe7EsMuP3f9tMOoldA7r1uTxpSxFMOTw==
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES256-GCM-SHA384 · Checked 2026-09-26T18:45:51+00:00

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

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