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

txdot.gov · 168.44.238.215:443

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
C=US ST=Texas L=Austin O=Texas Department of Transportation CN=www.txdot.gov
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-09-29T00:00:00+00:00
Expires
2027-04-15T23:59:59+00:00
Days remaining
163
Serial (hex)
0EACFDEDE5FC8DE1B765A31530BF5C15
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:www.txdot.gov, DNS:CSTAR.TXDOT.GOV, DNS:CSTARUAT.TXDOT.GOV, DNS:txdot.gov, DNS:a.txdot.gov, DNS:author.txdot.gov, DNS:preview.txdot.gov, DNS:*.txdot.gov

SHA-256 fingerprint

E3:23:60:15:3D:7D:2A:26:DF:B3:A7:27:66:F0:7E:31:3B:E3:B8:40:78:90:55:2F:CC:45:6F:C8:A4:2F:48:A4
Certificate extensions & PEM
authorityKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
subjectKeyIdentifier
7C:BB:62:64:A2:92:13:29:E6:03:6A:A2:42:58:D1:22:7F:D4:32:46
subjectAltName
DNS:www.txdot.gov, DNS:CSTAR.TXDOT.GOV, DNS:CSTARUAT.TXDOT.GOV, DNS:txdot.gov, DNS:a.txdot.gov, DNS:author.txdot.gov, DNS:preview.txdot.gov, DNS:*.txdot.gov
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crt
basicConstraints
CA:FALSE
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 : Sep 29 22:25:04.938 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:08:E7:90:BB:22:54:AC:1C:6B:44:AE:C6: 03:7F:FD:FD:04:39:54:47:31:98:F7:9E:62:D5:1A:4A: CE:D2:36:9B:02:21:00:E8:C4:D7:A4:F6:91:A4:7F:E0: 63:4B:48:40:DF:EE:37:81:28:31:9C:ED:18:8B:7C:AD: C7:42:50:A4:EB:AF:B6 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Sep 29 22:25:04.944 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:6B:98:EF:26:FA:99:13:B7:EF:2E:DC:7A: A0:FA:52:E6:FB:C0:F5:16:DC:67:3E:7F:68:74:A6:D2: 16:D8:94:2A:02:20:67:36:74:EE:EA:7C:BE:17:B5:85: BE:9D:55:04:B6:07:AE:13:6D:6C:70:D9:4D:F5:F2:0A: A3:D4:07:4A:B5:B1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:C2:BD:0C:E9:14:0E:64:A5:C9:4A:01:93:0A:5A:A1: BB:35:97:0E:00:EE:11:16:89:68:2A:1C:44:D7:B5:66 Timestamp : Sep 29 22:25:04.974 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:33:24:CB:F4:3E:5E:D5:23:11:07:B6:AB: 30:C3:B7:F9:14:C9:71:88:FE:F7:62:E5:E0:9A:BD:B9: 00:86:58:30:02:20:40:B4:E8:D7:91:73:B2:DC:FA:8C: C6:7D:2D:45:3C:77:88:FD:5F:C0:D0:80:84:01:C1:20: F1:6C:45:6B:EE:78
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-03T18:15:19+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=DigiCert SHA2 Secure Server CA
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root CA
Valid from
2013-03-08T12:00:00+00:00
Expires
2023-03-08T12:00:00+00:00
Days remaining
-1337
Serial (hex)
01FDA3EB6ECA75C888438B724BCFBC91
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

15:4C:43:3C:49:19:29:C5:EF:68:6E:83:8E:32:36:64:A0:0E:6A:0D:82:2C:CC:95:8F:B4:DA:B0:3E:49:A0:8F
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
keyUsage
Digital Signature, Certificate Sign, CRL Sign
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootCA.crl Full Name: URI:http://crl4.digicert.com/DigiCertGlobalRootCA.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS
subjectKeyIdentifier
0F:80:61:1C:82:31:61:D5:2F:28:E7:8D:46:38:B4:2C:E1:C6:D9:E2
authorityKeyIdentifier
03:DE:50:35:56:D1:4C:BB:66:F0:A3:E2:1B:1B:C3:97:B2:3D:D1:55
-----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.

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