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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

btcl.gov.bd · 159.13.21.220:443

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 expires within 30 days.

Certificate verification failed

Subject
CN=www.btcl.gov.bd
Issuer
C=GB O=Sectigo Limited CN=Sectigo Public Server Authentication CA DV R36
Valid from
2025-10-26T00:00:00+00:00
Expires
2026-10-26T23:59:59+00:00
Days remaining
7
Serial (hex)
BE92E5E835C2763AAE11E7D69826E487
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.btcl.gov.bd, DNS:btcl.gov.bd

SHA-256 fingerprint

C6:85:E9:FD:F8:5F:53:E8:50:C8:04:B2:F7:FA:7D:C2:CE:EA:B7:5C:BE:57:C9:40:BD:4A:71:47:BB:BF:A1:0D
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
16:CB:2E:61:EC:20:86:FB:2A:37:06:D1:4A:AA:A7:42:8D:20:14:FA
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:www.btcl.gov.bd, DNS:btcl.gov.bd
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Oct 26 09:37:53.029 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:62:F5:79:F8:50:A1:3F:07:5A:95:44:27: 14:DF:FA:DE:CE:95:5C:D5:BE:2C:3C:B3:E7:84:0F:1D: 60:51:1D:84:02:21:00:F4:1A:4B:F2:C7:CF:45:16:7C: 5F:2F:EA:3E:E0:F8:84:0B:A0:5A:BE:B8:B7:AE:CB:6B: DB:15:CD:C0:E0:24:04 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Oct 26 09:37:53.138 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:3A:D2:CE:ED:1B:8F:2D:B3:F8:95:D3:C7: CB:76:55:87:3D:9C:B0:15:73:65:8D:86:74:57:3E:47: 7C:84:85:88:02:20:2B:99:18:30:4B:9D:84:19:85:B5: 4A:77:9D:28:67:4E:99:B0:C4:20:A2:98:F7:2D:01:4C: 09:E0:1F:40:59:FF Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Oct 26 09:37:52.923 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:B8:95:1F:92:73:61:F5:95:99:C7:66: B0:57:A7:D3:80:2C:71:73:68:2E:E9:6B:B4:D8:4B:B7: D1:D7:28:30:9D:02:20:10:43:A9:9F:A2:E2:D4:F1:91: 97:D9:A8:47:39:2C:3E:D7:75:54:AB:D9:DB:00:6F:DC: 44:72:24:99:38:DA:87
-----BEGIN CERTIFICATE-----
MIIGejCCBOKgAwIBAgIRAL6S5eg1wnY6rhHn1pgm5IcwDQYJKoZIhvcNAQELBQAw
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N/QSBjRPfSfluWZzfx54/lCTXFKR7ePb1nEfX9JR
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-19T01:55:28+00:00

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

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