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

l3.net · 4.68.80.110:443

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 has expired.

Certificate verification failed

Subject
C=US ST=Louisiana L=Monroe O=CenturyLink, Inc. OU=GTI CN=www.level3.com
Issuer
C=US O=DigiCert Inc CN=DigiCert SHA2 Secure Server CA
Valid from
2019-03-06T00:00:00+00:00
Expires
2021-03-10T12:00:00+00:00
Days remaining
-2022
Serial (hex)
0F9C970BC8930F579E5C875AC457807C
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.level3.com, DNS:level3.com

SHA-256 fingerprint

2F:35:92:98:13:B3:E9:C4:43:25:62:97:73:63:23:68:BF:EC:A0:0F:71:EB:36:A1:C9:C7:99:7E:22:E0:9F:00
Certificate extensions & PEM
authorityKeyIdentifier
0F:80:61:1C:82:31:61:D5:2F:28:E7:8D:46:38:B4:2C:E1:C6:D9:E2
subjectKeyIdentifier
89:B7:70:F9:43:15:A5:EE:76:3D:AA:7F:80:0D:D5:3C:FB:CE:34:A4
subjectAltName
DNS:www.level3.com, DNS:level3.com
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/ssca-sha2-g6.crl Full Name: URI:http://crl4.digicert.com/ssca-sha2-g6.crl
certificatePolicies
Policy: 2.16.840.1.114412.1.1 CPS: https://www.digicert.com/CPS Policy: 2.23.140.1.2.2
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertSHA2SecureServerCA.crt
basicConstraints
CA:FALSE
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A4:B9:09:90:B4:18:58:14:87:BB:13:A2:CC:67:70:0A: 3C:35:98:04:F9:1B:DF:B8:E3:77:CD:0E:C8:0D:DC:10 Timestamp : Mar 6 20:09:03.240 2019 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:EF:5E:36:4B:28:A7:50:91:59:4C:41: 97:B7:FA:9D:38:F2:52:C2:4F:C2:01:C1:52:88:8D:7D: 96:FB:87:26:DB:02:21:00:DE:43:04:25:B4:D6:D6:54: 9B:F8:E8:A8:1A:E2:89:EF:CC:69:06:64:6D:56:81:E5: 44:79:19:66:96:E7:13:A9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 87:75:BF:E7:59:7C:F8:8C:43:99:5F:BD:F3:6E:FF:56: 8D:47:56:36:FF:4A:B5:60:C1:B4:EA:FF:5E:A0:83:0F Timestamp : Mar 6 20:09:03.561 2019 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:32:EE:92:D7:BC:55:17:33:21:A8:EF:23: E2:90:9F:A6:A8:FB:B6:2C:E8:B3:4A:92:FB:59:DC:E1: 00:DE:1F:A9:02:21:00:D8:E6:D6:CB:F2:6F:DB:EE:F9: 66:C5:15:0A:3B:6E:04:D8:78:A1:90:DD:B6:18:DE:F6: DC:46:CD:7A:0D:96:05 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 44:94:65:2E:B0:EE:CE:AF:C4:40:07:D8:A8:FE:28:C0: DA:E6:82:BE:D8:CB:31:B5:3F:D3:33:96:B5:B6:81:A8 Timestamp : Mar 6 20:09:03.270 2019 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:5C:F0:66:C4:35:92:CB:F6:5B:1C:EB:B8: 5F:30:EC:53:2F:BC:AD:03:E0:B9:0E:2B:A6:0A:6F:70: 6C:C8:C2:D2:02:21:00:D6:7C:97:55:F3:A0:67:99:56: CA:63:95:C3:12:74:D5:E6:15:BF:02:1D:34:81:90:AE: 7B:EE:31:E1:03:14:D2
-----BEGIN CERTIFICATE-----
MIIGsjCCBZqgAwIBAgIQD5yXC8iTD1eeXIdaxFeAfDANBgkqhkiG9w0BAQsFADBN
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMScwJQYDVQQDEx5E
aWdpQ2VydCBTSEEyIFNlY3VyZSBTZXJ2ZXIgQ0EwHhcNMTkwMzA2MDAwMDAwWhcN
MjEwMzEwMTIwMDAwWjB1MQswCQYDVQQGEwJVUzESMBAGA1UECBMJTG91aXNpYW5h
MQ8wDQYDVQQHEwZNb25yb2UxGjAYBgNVBAoTEUNlbnR1cnlMaW5rLCBJbmMuMQww
CgYDVQQLEwNHVEkxFzAVBgNVBAMTDnd3dy5sZXZlbDMuY29tMIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxqM1yldGDOXojTlJrRNSV7dYl7iGum9PsBqs
WIPzCnnXk7ZL38ESXG+WEJfNFJt+L23iXHaJtGS+jaSXowFzNQz26UStPZuj/tVM
AX8pNmM76aChMfOAutzNWghrOodXXkjapN502cFRwhif/ALDvLcrrZ8A45XxBVE1
pa5+AxzgScxAEwmetQ6Y4ujCTMCtK59FWAjQ+YnvIV+/taDMyCPwyByeHzp+csW2
nzBwd665oe4iabGjSOrr9ALFrJC5JHenEofXmLlJLWqZF/0KXkniUvLVbvMngK9K
ImlsdWAU0YzMBN7cyD7Srwj+qrLo/f8pHeFYdN2W4dHvYlZR5QIDAQABo4IDZDCC
A2AwHwYDVR0jBBgwFoAUD4BhHIIxYdUvKOeNRji0LOHG2eIwHQYDVR0OBBYEFIm3
cPlDFaXudj2qf4AN1Tz7zjSkMCUGA1UdEQQeMByCDnd3dy5sZXZlbDMuY29tggps
ZXZlbDMuY29tMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI
KwYBBQUHAwIwawYDVR0fBGQwYjAvoC2gK4YpaHR0cDovL2NybDMuZGlnaWNlcnQu
Y29tL3NzY2Etc2hhMi1nNi5jcmwwL6AtoCuGKWh0dHA6Ly9jcmw0LmRpZ2ljZXJ0
LmNvbS9zc2NhLXNoYTItZzYuY3JsMEwGA1UdIARFMEMwNwYJYIZIAYb9bAEBMCow
KAYIKwYBBQUHAgEWHGh0dHBzOi8vd3d3LmRpZ2ljZXJ0LmNvbS9DUFMwCAYGZ4EM
AQICMHwGCCsGAQUFBwEBBHAwbjAkBggrBgEFBQcwAYYYaHR0cDovL29jc3AuZGln
aWNlcnQuY29tMEYGCCsGAQUFBzAChjpodHRwOi8vY2FjZXJ0cy5kaWdpY2VydC5j
b20vRGlnaUNlcnRTSEEyU2VjdXJlU2VydmVyQ0EuY3J0MAwGA1UdEwEB/wQCMAAw
ggF/BgorBgEEAdZ5AgQCBIIBbwSCAWsBaQB3AKS5CZC0GFgUh7sTosxncAo8NZgE
+RvfuON3zQ7IDdwQAAABaVSfqAgAAAQDAEgwRgIhAO9eNksop1CRWUxBl7f6nTjy
UsJPwgHBUoiNfZb7hybbAiEA3kMEJbTW1lSb+OioGuKJ78xpBmRtVoHlRHkZZpbn
E6kAdgCHdb/nWXz4jEOZX73zbv9WjUdWNv9KtWDBtOr/XqCDDwAAAWlUn6lJAAAE
AwBHMEUCIDLukte8VRczIajvI+KQn6ao+7Ys6LNKkvtZ3OEA3h+pAiEA2ObWy/Jv
2+75ZsUVCjtuBNh4oZDdthje9txGzXoNlgUAdgBElGUusO7Or8RAB9io/ijA2uaC
vtjLMbU/0zOWtbaBqAAAAWlUn6gmAAAEAwBHMEUCIFzwZsQ1ksv2WxzruF8w7FMv
vK0D4LkOK6YKb3BsyMLSAiEA1nyXVfOgZ5lWymOVwxJ01eYVvwIdNIGQrnvuMeED
FNIwDQYJKoZIhvcNAQELBQADggEBAMEX+Fu6z1sI5EgPfLqwj6FdS3f9rNzfMtmO
uLdf1u383kbriXIhm2yCjggedpYLZERukDpyd/OwuvrN4cpzMmCA9SvqnMkqsNUR
bxUTdhrWPLsEcfpdITSFZalX+4h+lfydzgCxA3CIpo6Uj/0k0Nj6HdFAkQAGTQbL
dcW+Ad8Z+gsocHvoz0HeW6rROmjbGHj6R5gBbS6Iu35U4oQoXkRYlPGs6TEQ/d4C
NSlx1iBtq0Ayizh6DoHEpFDrOrMguVE6UfU28QwO6Cy4i3j6K2NlH1JZAfwx85M3
Y+xRCMqMzNUxRLDrv32/8o0hlMZfzTZWYXA/66PXf5Ovl4N9Y+M=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-21T15:45:46+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
-1294
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.

View certificate JSON

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