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

smtp3.nantworks.com · 208.74.224.149:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. Peer certificate subjectAltName did not match expected name `smtp3.nantworks.com'

Certificate verification failed

Subject
CN=securemail.nant.com
Issuer
C=US ST=Arizona L=Scottsdale O=GoDaddy.com, Inc. OU=http://certs.godaddy.com/repository/ CN=Go Daddy Secure Certificate Authority - G2
Valid from
2026-01-15T19:29:06+00:00
Expires
2027-02-16T19:29:06+00:00
Days remaining
101
Serial (hex)
BA442E44E086D4A1
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:securemail.nant.com, DNS:www.securemail.nant.com

SHA-256 fingerprint

A5:37:C6:87:4E:6B:37:EC:04:6B:A6:0E:A2:AA:85:0A:6E:7E:44:3A:98:54:DB:6B:9B:46:26:FD:4A:49:A7:CB
Certificate extensions & PEM
basicConstraints
CA:FALSE
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
keyUsage
Digital Signature, Key Encipherment
crlDistributionPoints
Full Name: URI:http://crl.godaddy.com/gdig2s1-72077.crl
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 2.16.840.1.114413.1.7.23.1 CPS: http://certificates.godaddy.com/repository/
authorityInfoAccess
OCSP - URI:http://ocsp.godaddy.com/ CA Issuers - URI:http://certificates.godaddy.com/repository/gdig2.crt
authorityKeyIdentifier
40:C2:BD:27:8E:CC:34:83:30:A2:33:D7:FB:6C:B3:F0:B4:2C:80:CE
subjectAltName
DNS:securemail.nant.com, DNS:www.securemail.nant.com
subjectKeyIdentifier
30:16:CD:47:A5:77:22:9A:D3:23:1F:FC:33:99:1A:EE:7A:ED:EB:DE
ct_precert_scts
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 : Jan 15 19:29:07.284 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:CB:C1:00:A2:59:92:DE:77:88:41:7A: 70:AC:66:10:73:7D:82:D6:46:8C:19:EC:86:91:1F:55: DA:67:84:30:A8:02:20:5C:0F:7C:6C:F6:29:CA:71:BC: AA:94:41:EC:4A:56:5E:4A:C7:AE:8A:3A:DB:D6:A4:2E: EC:5A:F9:B8:6F:D9:C4 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 15 19:29:07.927 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:01:0C:E1:43:5B:FC:DB:E3:24:22:13:6B: 5B:90:69:6A:F2:22:E5:55:4A:87:EA:C2:34:15:CC:D6: F4:5B:43:C3:02:20:60:99:D5:EF:39:95:C9:BA:ED:36: 04:87:A5:86:68:00:BC:94:8B:5C:BC:FC:D0:08:A1:04: 09:E8:E2:9A:CC:0A 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 : Jan 15 19:29:08.159 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:67:4E:61:7D:58:54:74:7C:5F:2C:B4:F3: 11:E6:EA:4D:94:14:28:33:78:BC:7B:24:B5:82:6A:04: 03:9F:FA:5C:02:20:10:F8:5E:AB:DF:8B:76:69:C2:1B: DE:9D:9B:7D:F1:40:87:9B:90:81:F4:31:EB:6B:81:FF: 8F:ED:25:8F:22:EB
-----BEGIN CERTIFICATE-----
MIIGpDCCBYygAwIBAgIJALpELkTghtShMA0GCSqGSIb3DQEBCwUAMIG0MQswCQYD
VQQGEwJVUzEQMA4GA1UECBMHQXJpem9uYTETMBEGA1UEBxMKU2NvdHRzZGFsZTEa
MBgGA1UEChMRR29EYWRkeS5jb20sIEluYy4xLTArBgNVBAsTJGh0dHA6Ly9jZXJ0
cy5nb2RhZGR5LmNvbS9yZXBvc2l0b3J5LzEzMDEGA1UEAxMqR28gRGFkZHkgU2Vj
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DTI3MDIxNjE5MjkwNlowHjEcMBoGA1UEAxMTc2VjdXJlbWFpbC5uYW50LmNvbTCC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VR0RBDAwLoITc2VjdXJlbWFpbC5uYW50LmNvbYIXd3d3LnNlY3VyZW1haWwubmFu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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-07T05:52:57+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US ST=Arizona L=Scottsdale O=GoDaddy.com, Inc. OU=http://certs.godaddy.com/repository/ CN=Go Daddy Secure Certificate Authority - G2
Issuer
C=US ST=Arizona L=Scottsdale O=GoDaddy.com, Inc. CN=Go Daddy Root Certificate Authority - G2
Valid from
2011-05-03T07:00:00+00:00
Expires
2031-05-03T07:00:00+00:00
Days remaining
1638
Serial (hex)
07
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

97:3A:41:27:6F:FD:01:E0:27:A2:AA:D4:9E:34:C3:78:46:D3:E9:76:FF:6A:62:0B:67:12:E3:38:32:04:1A:A6
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Certificate Sign, CRL Sign
subjectKeyIdentifier
40:C2:BD:27:8E:CC:34:83:30:A2:33:D7:FB:6C:B3:F0:B4:2C:80:CE
authorityKeyIdentifier
3A:9A:85:07:10:67:28:B6:EF:F6:BD:05:41:6E:20:C1:94:DA:0F:DE
authorityInfoAccess
OCSP - URI:http://ocsp.godaddy.com/
crlDistributionPoints
Full Name: URI:http://crl.godaddy.com/gdroot-g2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://certs.godaddy.com/repository/
-----BEGIN CERTIFICATE-----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b2NzcC5nb2RhZGR5LmNvbS8wNQYDVR0fBC4wLDAqoCigJoYkaHR0cDovL2NybC5n
b2RhZGR5LmNvbS9nZHJvb3QtZzIuY3JsMEYGA1UdIAQ/MD0wOwYEVR0gADAzMDEG
CCsGAQUFBwIBFiVodHRwczovL2NlcnRzLmdvZGFkZHkuY29tL3JlcG9zaXRvcnkv
MA0GCSqGSIb3DQEBCwUAA4IBAQAIfmyTEMg4uJapkEv/oV9PBO9sPpyIBslQj6Zz
91cxG7685C/b+LrTW+C05+Z5Yg4MotdqY3MxtfWoSKQ7CC2iXZDXtHwlTxFWMMS2
RJ17LJ3lXubvDGGqv+QqG+6EnriDfcFDzkSnE3ANkR/0yBOtg2DZ2HKocyQetawi
DsoXiWJYRBuriSUBAA/NxBti21G00w9RKpv0vHP8ds42pM3Z2Czqrpv1KrKQ0U11
GIo/ikGQI31bS/6kA1ibRrLDYGCD+H1QQc7CoZDDu+8CL9IVVO5EFdkKrqeKM+2x
LXY2JtwE65/3YR8V3Idv7kaWKK2hJn0KCacuBKONvPi8BDAB
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US ST=Arizona L=Scottsdale O=GoDaddy.com, Inc. CN=Go Daddy Root Certificate Authority - G2
Issuer
C=US ST=Arizona L=Scottsdale O=GoDaddy.com, Inc. CN=Go Daddy Root Certificate Authority - G2
Valid from
2009-09-01T00:00:00+00:00
Expires
2037-12-31T23:59:59+00:00
Days remaining
4072
Serial (hex)
0
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

45:14:0B:32:47:EB:9C:C8:C5:B4:F0:D7:B5:30:91:F7:32:92:08:9E:6E:5A:63:E2:74:9D:D3:AC:A9:19:8E:DA
Certificate extensions & PEM
basicConstraints
CA:TRUE
keyUsage
Certificate Sign, CRL Sign
subjectKeyIdentifier
3A:9A:85:07:10:67:28:B6:EF:F6:BD:05:41:6E:20:C1:94:DA:0F:DE
-----BEGIN CERTIFICATE-----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DfMAZiLIjWltNowRGLfTshxgtDj6AozO091GB94KPutdfMh8+7ArU6SSYmlRJQVh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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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