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

mail.securewebsystems.net · 91.198.228.16:443

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=*.securewebsystems.net
Issuer
C=US O=SSL Corporation CN=SSL.com TLS Issuing RSA CA R1
Valid from
2026-09-09T07:39:28+00:00
Expires
2027-03-26T07:48:36+00:00
Days remaining
164
Serial (hex)
09572C1CFBA99B3C63859BA2D992F8A5
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.securewebsystems.net, DNS:securewebsystems.net

SHA-256 fingerprint

44:70:07:FA:E7:EA:EA:F0:EC:25:25:9F:97:B5:C0:D7:E0:9A:36:09:74:CE:82:5E:E7:3D:5E:13:F5:5F:A8:52
Certificate extensions & PEM
basicConstraints
CA:FALSE
authorityKeyIdentifier
79:BA:94:77:A0:0D:19:DD:34:E6:39:A4:FC:4C:A5:D2:5A:6D:F5:8C
authorityInfoAccess
CA Issuers - URI:http://cert.ssl.com/SSL.com-TLS-I-RSA-R1.cer OCSP - URI:http://ocsps.ssl.com
subjectAltName
DNS:*.securewebsystems.net, DNS:securewebsystems.net
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 1.3.6.1.4.1.38064.1.3.1.1
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crls.ssl.com/SSL.com-TLS-I-RSA-R1.crl
subjectKeyIdentifier
F2:95:C2:19:21:BB:C4:2D:0E:51:B0:12:87:83:99:9E:99:B0:6A:52
keyUsage
Digital Signature, Key Encipherment
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 9 07:49:29.513 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:0D:8E:94:90:B9:B8:47:57:96:09:9C:DE: 4C:8A:A4:E5:CD:74:FC:FB:3E:66:89:4F:D0:4D:DD:AC: D6:9B:EC:F0:02:20:2E:9D:CE:C6:B5:3F:F5:9C:0A:86: 7A:68:2D:0E:D4:60:C9:47:95:60:AF:26:AE:3A:7D:EE: E5:58:6F:A8:E8:14 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 9 07:49:29.582 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:DF:15:2D:8A:2C:78:91:EE:3C:4B:62: 79:E9:58:88:15:29:86:D9:B6:FB:D6:07:14:B7:0A:FD: 56:8D:AC:54:11:02:21:00:BD:BC:40:94:1B:54:43:31: 25:57:2A:3E:84:F2:A8:74:71:64:53:68:E2:75:7D:88: 74:70:97:A3:A6:9A:10:88 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:A2:39:67:C6:0D:B6:46:87:C6:6F:3D:F9:99:94:76: 93:A6:A6:11:20:84:57:D5:55:E7:E3:D0:A1:D9:B6:46 Timestamp : Sep 9 07:49:29.578 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C0:6F:07:A5:52:F6:45:B1:79:55:44: 9B:0E:20:1E:B6:8E:C6:9C:53:8C:AA:99:26:2A:34:44: 11:F1:F5:71:4E:02:21:00:D8:E4:33:24:AD:7A:6D:81: EE:DF:EF:92:92:EB:FA:51:5C:05:57:3A:74:4F:B0:C1: 28:F8:4D:39:89:CB:61:30
-----BEGIN CERTIFICATE-----
MIIHiTCCBfGgAwIBAgIQCVcsHPupmzxjhZui2ZL4pTANBgkqhkiG9w0BAQsFADBP
MQswCQYDVQQGEwJVUzEYMBYGA1UECgwPU1NMIENvcnBvcmF0aW9uMSYwJAYDVQQD
DB1TU0wuY29tIFRMUyBJc3N1aW5nIFJTQSBDQSBSMTAeFw0yNjA5MDkwNzM5Mjha
Fw0yNzAzMjYwNzQ4MzZaMCExHzAdBgNVBAMMFiouc2VjdXJld2Vic3lzdGVtcy5u
ZXQwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQDsr2NmfQSBMCWdrg0Q
VFjorHym+d3vJrhow4FzPAWmY13nfElR/s7nmxNuOM9RiMvRhFRlvBQDfu3NgfkR
LCuyBvRdb59PErTRZifRW0bPuiaAUFfU4M9SpZvU6tK56CR+QjVa8u5xK5dxPS8h
EIy8CiXGiLVIbGFtz2BjHdTghVIHSUyK1PGeWLkl+RkmtFIJGSFrXkqWfdlncWX4
1fY0y2dnZcWNWfiF1zd+fFaqhvF2oIgA8tbvtE/JlowSR4j19V18DhfMnm1InvV1
A7J/uCL/3FaJ4EwKi2eYt5MOQ9SmHGd5sOjiW2nNxz22jHIFkGTWvj0csx8iZJMK
em1gEjBTeBf8+SoYeDmajWw6wos84qovb9HRItOMTJIhQBCIuXNsSOiHksxM3fzB
a+UVBPTtcTkXLGUuvEpOtiCQXCYnj5IOjjWf52om43FOxsceffMoknitXLhANDIO
hAOPf730cdm/MdfufhIP3akCipCseI682A7fjUcVx76zerZ3gfpvIy5M1bhZaljY
qonSHcwpBJ0h7xlwrFCGfRhuZQBvF9UBnch7lIncl9bIuPtQmRwtE6FiITTvDKan
0EX8/weu6PRVJY1eozzcDR//zUtJpdwqa3BQKROEoMvJGfTiI8zQ4mF2bmoy+qmd
o+rcORLBO/3PotZHkWPbjXwB6wIDAQABo4IDDTCCAwkwDAYDVR0TAQH/BAIwADAf
BgNVHSMEGDAWgBR5upR3oA0Z3TTmOaT8TKXSWm31jDBqBggrBgEFBQcBAQReMFww
OAYIKwYBBQUHMAKGLGh0dHA6Ly9jZXJ0LnNzbC5jb20vU1NMLmNvbS1UTFMtSS1S
U0EtUjEuY2VyMCAGCCsGAQUFBzABhhRodHRwOi8vb2NzcHMuc3NsLmNvbTA3BgNV
HREEMDAughYqLnNlY3VyZXdlYnN5c3RlbXMubmV0ghRzZWN1cmV3ZWJzeXN0ZW1z
Lm5ldDAjBgNVHSAEHDAaMAgGBmeBDAECATAOBgwrBgEEAYKpMAEDAQEwHQYDVR0l
BBYwFAYIKwYBBQUHAwIGCCsGAQUFBwMBMD0GA1UdHwQ2MDQwMqAwoC6GLGh0dHA6
Ly9jcmxzLnNzbC5jb20vU1NMLmNvbS1UTFMtSS1SU0EtUjEuY3JsMB0GA1UdDgQW
BBTylcIZIbvELQ5RsBKHg5membBqUjAOBgNVHQ8BAf8EBAMCBaAwggF/BgorBgEE
AdZ5AgQCBIIBbwSCAWsBaQB1AExj3JjlnB2riPYeij3ero+rRKM3e1+blMP7oZz8
wb4mAAABoIUksSkAAAQDAEYwRAIgDY6UkLm4R1eWCZzeTIqk5c10/Ps+ZolP0E3d
rNab7PACIC6dzsa1P/WcCoZ6aC0O1GDJR5VgryauOn3u5VhvqOgUAHcA1tWNqdAX
U/NqSqDHV0kCr+vH3CzTjNn3ZMgMiRkenwIAAAGghSSxbgAABAMASDBGAiEA3xUt
iix4ke48S2J56ViIFSmG2bb71gcUtwr9Vo2sVBECIQC9vECUG1RDMSVXKj6E8qh0
cWRTaOJ1fYh0cJejppoQiAB3AEaiOWfGDbZGh8ZvPfmZlHaTpqYRIIRX1VXn49Ch
2bZGAAABoIUksWoAAAQDAEgwRgIhAMBvB6VS9kWxeVVEmw4gHraOxpxTjKqZJio0
RBHx9XFOAiEA2OQzJK16bYHu3++Skuv6UVwFVzp0T7DBKPhNOYnLYTAwDQYJKoZI
hvcNAQELBQADggGBADJSC9a5XJhFEL8A3uj4SGpevjx/2D4V6Ca7Mb7SclhOupUu
w0bgPABE7CJDj+aw5lSKsoJhEd+zJH57dc57PyKL2KTXQMgk/8oVwyD/CLK8FVaU
LqY3vHeG6Dal0X1h6Ibs/K5r1wSMm4oqHqtaVZSKFyyyKJj9Iat7hbKxzi0S96Bn
d3+K15cb9cxsYxb8Ls+bvQRprci7G9YFyeZyg4Q+dK7cjZ8GM0RHyREdgovsz0/P
MTU88maDYAy5qdZNzDpX7L6li+zXE16CMQg88zLoK1cT3UdvUby956nHjJFV1KHB
03nDw+0ns/+t9STE6p7d94NDUOI3Rham/Qt4qFwe+4cfaAUCLmUtqY6oHl3KjhVg
osi5SFB8dqhd/cmd6hvNJLqoLh65KjbDVleuw9MSYZUVm3oZv1qBs0Q5cMWN3E9B
oQLtK3wRzGcU1BvORl50c9iOn50kUzpXGtfKwhDwX1D/ee68k3qs3hSLLO+xO6hw
sJdd+pqGk0yuaoXHYQ==
-----END CERTIFICATE-----

Cipher: ECDHE-RSA-AES128-GCM-SHA256 · Checked 2026-10-13T02:39:33+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GB ST=Greater Manchester L=Salford O=Sectigo Limited CN=Sectigo RSA Domain Validation Secure Server CA
Issuer
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Valid from
2018-11-02T00:00:00+00:00
Expires
2030-12-31T23:59:59+00:00
Days remaining
1540
Serial (hex)
7D5B5126B476BA11DB74160BBC530DA7
Signature
RSA-SHA384
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

7F:A4:FF:68:EC:04:A9:9D:75:28:D5:08:5F:94:90:7F:4D:1D:D1:C5:38:1B:AC:DC:83:2E:D5:C9:60:21:46:76
Certificate extensions & PEM
authorityKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
subjectKeyIdentifier
8D:8C:5E:C4:54:AD:8A:E1:77:E9:9B:F9:9B:05:E1:B8:01:8D:61:E1
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
certificatePolicies
Policy: X509v3 Any Policy Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://crl.usertrust.com/USERTrustRSACertificationAuthority.crl
authorityInfoAccess
CA Issuers - URI:http://crt.usertrust.com/USERTrustRSAAddTrustCA.crt OCSP - URI:http://ocsp.usertrust.com
-----BEGIN CERTIFICATE-----
MIIGEzCCA/ugAwIBAgIQfVtRJrR2uhHbdBYLvFMNpzANBgkqhkiG9w0BAQwFADCB
iDELMAkGA1UEBhMCVVMxEzARBgNVBAgTCk5ldyBKZXJzZXkxFDASBgNVBAcTC0pl
cnNleSBDaXR5MR4wHAYDVQQKExVUaGUgVVNFUlRSVVNUIE5ldHdvcmsxLjAsBgNV
BAMTJVVTRVJUcnVzdCBSU0EgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwHhcNMTgx
MTAyMDAwMDAwWhcNMzAxMjMxMjM1OTU5WjCBjzELMAkGA1UEBhMCR0IxGzAZBgNV
BAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4GA1UEBxMHU2FsZm9yZDEYMBYGA1UE
ChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQDEy5TZWN0aWdvIFJTQSBEb21haW4g
VmFsaWRhdGlvbiBTZWN1cmUgU2VydmVyIENBMIIBIjANBgkqhkiG9w0BAQEFAAOC
AQ8AMIIBCgKCAQEA1nMz1tc8INAA0hdFuNY+B6I/x0HuMjDJsGz99J/LEpgPLT+N
TQEMgg8Xf2Iu6bhIefsWg06t1zIlk7cHv7lQP6lMw0Aq6Tn/2YHKHxYyQdqAJrkj
eocgHuP/IJo8lURvh3UGkEC0MpMWCRAIIz7S3YcPb11RFGoKacVPAXJpz9OTTG0E
oKMbgn6xmrntxZ7FN3ifmgg0+1YuWMQJDgZkW7w33PGfKGioVrCSo1yfu4iYCBsk
Haswha6vsC6eep3BwEIc4gLw6uBK0u+QDrTBQBbwb4VCSmT3pDCg/r8uoydajotY
uK3DGReEY+1vVv2Dy2A0xHS+5p3b4eTlygxfFQIDAQABo4IBbjCCAWowHwYDVR0j
BBgwFoAUU3m/WqorSs9UgOHYm8Cd8rIDZsswHQYDVR0OBBYEFI2MXsRUrYrhd+mb
+ZsF4bgBjWHhMA4GA1UdDwEB/wQEAwIBhjASBgNVHRMBAf8ECDAGAQH/AgEAMB0G
A1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAbBgNVHSAEFDASMAYGBFUdIAAw
CAYGZ4EMAQIBMFAGA1UdHwRJMEcwRaBDoEGGP2h0dHA6Ly9jcmwudXNlcnRydXN0
LmNvbS9VU0VSVHJ1c3RSU0FDZXJ0aWZpY2F0aW9uQXV0aG9yaXR5LmNybDB2Bggr
BgEFBQcBAQRqMGgwPwYIKwYBBQUHMAKGM2h0dHA6Ly9jcnQudXNlcnRydXN0LmNv
bS9VU0VSVHJ1c3RSU0FBZGRUcnVzdENBLmNydDAlBggrBgEFBQcwAYYZaHR0cDov
L29jc3AudXNlcnRydXN0LmNvbTANBgkqhkiG9w0BAQwFAAOCAgEAMr9hvQ5Iw0/H
ukdN+Jx4GQHcEx2Ab/zDcLRSmjEzmldS+zGea6TvVKqJjUAXaPgREHzSyrHxVYbH
7rM2kYb2OVG/Rr8PoLq0935JxCo2F57kaDl6r5ROVm+yezu/Coa9zcV3HAO4OLGi
H19+24rcRki2aArPsrW04jTkZ6k4Zgle0rj8nSg6F0AnwnJOKf0hPHzPE/uWLMUx
RP0T7dWbqWlod3zu4f+k+TY4CFM5ooQ0nBnzvg6s1SQ36yOoeNDT5++SR2RiOSLv
xvcRviKFxmZEJCaOEDKNyJOuB56DPi/Z+fVGjmO+wea03KbNIaiGCpXZLoUmGv38
sbZXQm2V0TP2ORQGgkE49Y9Y3IBbpNV9lXj9p5v//cWoaasm56ekBYdbqbe4oyAL
l6lFhd2zi+WJN44pDfwGF/Y4QA5C5BIG+3vzxhFoYt/jmPQT2BVPi7Fp2RBgvGQq
6jG35LWjOhSbJuMLe/0CjraZwTiXWTb2qHSihrZe68Zk6s+go/lunrotEbaGmAhY
LcmsJWTyXnW0OMGuf1pGg+pRyrbxmRE1a6Vqe8YAsOf4vmSyrcjC8azjUeqkk+B5
yOGBQMkKW+ESPMFgKuOXwIlCypTPRpgSabuY0MLTDXJLR27lk8QyKGOHQ+SwMj4K
00u/I5sUKUErmgQfky3xxzlIPK1aEn8=
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US ST=New Jersey L=Jersey City O=The USERTRUST Network CN=USERTrust RSA Certification Authority
Issuer
C=GB ST=Greater Manchester L=Salford O=Comodo CA Limited CN=AAA Certificate Services
Valid from
2019-03-12T00:00:00+00:00
Expires
2028-12-31T23:59:59+00:00
Days remaining
810
Serial (hex)
3972443AF922B751D7D36C10DD313595
Signature
RSA-SHA384
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

68:B9:C7:61:21:9A:5B:1F:01:31:78:44:74:66:5D:B6:1B:BD:B1:09:E0:0F:05:CA:9F:74:24:4E:E5:F5:F5:2B
Certificate extensions & PEM
authorityKeyIdentifier
A0:11:0A:23:3E:96:F1:07:EC:E2:AF:29:EF:82:A5:7F:D0:30:A4:B4
subjectKeyIdentifier
53:79:BF:5A:AA:2B:4A:CF:54:80:E1:D8:9B:C0:9D:F2:B2:03:66:CB
keyUsage
Digital Signature, Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
certificatePolicies
Policy: X509v3 Any Policy
crlDistributionPoints
Full Name: URI:http://crl.comodoca.com/AAACertificateServices.crl
authorityInfoAccess
OCSP - URI:http://ocsp.comodoca.com
-----BEGIN CERTIFICATE-----
MIIFgTCCBGmgAwIBAgIQOXJEOvkit1HX02wQ3TE1lTANBgkqhkiG9w0BAQwFADB7
MQswCQYDVQQGEwJHQjEbMBkGA1UECAwSR3JlYXRlciBNYW5jaGVzdGVyMRAwDgYD
VQQHDAdTYWxmb3JkMRowGAYDVQQKDBFDb21vZG8gQ0EgTGltaXRlZDEhMB8GA1UE
AwwYQUFBIENlcnRpZmljYXRlIFNlcnZpY2VzMB4XDTE5MDMxMjAwMDAwMFoXDTI4
MTIzMTIzNTk1OVowgYgxCzAJBgNVBAYTAlVTMRMwEQYDVQQIEwpOZXcgSmVyc2V5
MRQwEgYDVQQHEwtKZXJzZXkgQ2l0eTEeMBwGA1UEChMVVGhlIFVTRVJUUlVTVCBO
ZXR3b3JrMS4wLAYDVQQDEyVVU0VSVHJ1c3QgUlNBIENlcnRpZmljYXRpb24gQXV0
aG9yaXR5MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAgBJlFzYOw9sI
s9CsVw127c0n00ytUINh4qogTQktZAnczomfzD2p7PbPwdzx07HWezcoEStH2jnG
vDoZtF+mvX2do2NCtnbyqTsrkfjib9DsFiCQCT7i6HTJGLSR1GJk23+jBvGIGGqQ
Ijy8/hPwhxR79uQfjtTkUcYRZ0YIUcuGFFQ/vDP+fmyc/xadGL1RjjWmp2bIcmfb
IWax1Jt4A8BQOujM8Ny8nkz+rwWWNR9XWrf/zvk9tyy29lTdyOcSOk2uTIq3XJq0
tyA9yn8iNK5+O2hmAUTnAU5GU5szYPeUvlM3kHND8zLDU+/bqv50TmnHa4xgk97E
xwzf4TKuzJM7UXiVZ4vuPVb+DNBpDxsP8yUmazNt925H+nND5X4OpWaxKXwyhGNV
icQNwZNUMBkTrNN9N6frXTpsNVzbQdcS2qlJC9/YgIoJk2KOtWbPJYjNhLixP6Q5
D9kCnusSTJV882sFqV4Wg8y4Z+LoE53MW4LTTLPtW//e5XOsIzstAL81VXQJSdhJ
WBp/kjbmUZIO8yZ9HE0XvMnsQybQv0FfQKlERPSZ51eHnlAfV1SoPv10Yy+xUGUJ
5lhCLkMaTLTwJUdZ+gQek9QmRkpQgbLevni3/GcV4clXhB4PY9bpYrrWX1Uu6lzG
KAgEJTm4Diup8kyXHAc/DVL17e8vgg8CAwEAAaOB8jCB7zAfBgNVHSMEGDAWgBSg
EQojPpbxB+zirynvgqV/0DCktDAdBgNVHQ4EFgQUU3m/WqorSs9UgOHYm8Cd8rID
ZsswDgYDVR0PAQH/BAQDAgGGMA8GA1UdEwEB/wQFMAMBAf8wEQYDVR0gBAowCDAG
BgRVHSAAMEMGA1UdHwQ8MDowOKA2oDSGMmh0dHA6Ly9jcmwuY29tb2RvY2EuY29t
L0FBQUNlcnRpZmljYXRlU2VydmljZXMuY3JsMDQGCCsGAQUFBwEBBCgwJjAkBggr
BgEFBQcwAYYYaHR0cDovL29jc3AuY29tb2RvY2EuY29tMA0GCSqGSIb3DQEBDAUA
A4IBAQAYh1HcdCE9nIrgJ7cz0C7M7PDmy14R3iJvm3WOnnL+5Nb+qh+cli3vA0p+
rvSNb3I8QzvAP+u431yqqcau8vzY7qN7Q/aGNnwU4M309z/+3ri0ivCRlv79Q2R+
/czSAaF9ffgZGclCKxO/WIu6pKJmBHaIkU4MiRTOok3JMrO66BQavHHxW/BBC5gA
CiIDEOUMsfnNkjcZ7Tvx5Dq2+UUTJnWvu6rvP3t3O9LEApE9GQDTF1w52z97GA1F
zZOFli9d31kWTz9RvdVFGD/tSo7oBmF0Ixa1DVBzJ0RHfxBdiSprhTEUxOipakyA
vGp4z7h/jnZymQyd/teRCBaho1+V
-----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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