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

aubg.bg · 83.143.248.47:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
C=BG L=Blagoevgrad O=American University in Bulgaria CN=*.aubg.bg
Issuer
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Valid from
2026-08-03T00:00:00+00:00
Expires
2027-02-17T23:59:59+00:00
Days remaining
127
Serial (hex)
0E9FAC93F415F65E8197AE31347D4B6F
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.aubg.bg, DNS:www.aubg.bg, DNS:mail.aubg.bg, DNS:autodiscover.aubg.bg, DNS:legacymail.aubg.bg, DNS:exca1.aubg.bg, DNS:exca2.aubg.bg, DNS:exmb1.aubg.bg, DNS:exmb2.aubg.bg, DNS:netstart.aubg.bg, DNS:netstart6.aubg.bg, DNS:ts3.aubg.bg, DNS:webts.aubg.bg, DNS:ithelp.aubg.bg, DNS:app.aubg.bg, DNS:apps.aubg.bg, DNS:sg.aubg.bg, DNS:library.aubg.bg, DNS:libproxy.aubg.bg, DNS:portals.aubg.bg, DNS:community.aubg.bg, DNS:fportal.aubg.bg, DNS:sportal.aubg.bg, DNS:internal.aubg.bg, DNS:reg.aubg.bg, DNS:home.aubg.bg, DNS:purchasing.aubg.bg, DNS:repairs.aubg.bg, DNS:cloud.aubg.bg, DNS:owncloud.aubg.bg, DNS:fp.aubg.bg, DNS:aubg.bg

SHA-256 fingerprint

04:9A:BB:A6:A7:04:0B:02:AC:ED:1B:9D:F9:9C:27:FA:E4:07:CE:22:74:71:ED:0D:14:7B:68:DC:61:ED:94:1A
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
C9:BD:57:A3:44:87:63:69:8E:27:57:9E:D1:94:07:89:BD:B4:3A:4A
subjectAltName
DNS:*.aubg.bg, DNS:www.aubg.bg, DNS:mail.aubg.bg, DNS:autodiscover.aubg.bg, DNS:legacymail.aubg.bg, DNS:exca1.aubg.bg, DNS:exca2.aubg.bg, DNS:exmb1.aubg.bg, DNS:exmb2.aubg.bg, DNS:netstart.aubg.bg, DNS:netstart6.aubg.bg, DNS:ts3.aubg.bg, DNS:webts.aubg.bg, DNS:ithelp.aubg.bg, DNS:app.aubg.bg, DNS:apps.aubg.bg, DNS:sg.aubg.bg, DNS:library.aubg.bg, DNS:libproxy.aubg.bg, DNS:portals.aubg.bg, DNS:community.aubg.bg, DNS:fportal.aubg.bg, DNS:sportal.aubg.bg, DNS:internal.aubg.bg, DNS:reg.aubg.bg, DNS:home.aubg.bg, DNS:purchasing.aubg.bg, DNS:repairs.aubg.bg, DNS:cloud.aubg.bg, DNS:owncloud.aubg.bg, DNS:fp.aubg.bg, DNS:aubg.bg
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server 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 : Aug 3 10:25:25.786 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:20:F0:42:54:60:99:06:33:91:6C:1C:3C: 8C:B8:80:04:0B:99:E0:B9:64:08:47:DF:DE:B9:A6:DD: 69:A3:41:26:02:20:16:9C:79:37:B2:F0:D2:D5:B6:E0: 05:B0:85:2C:A0:9F:C1:8E:40:81:01:1C:9B:4E:6A:37: 3E:BD:2E:BB:15:25 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 : Aug 3 10:25:25.850 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:0D:33:FF:4A:57:D4:30:06:71:BC:4B:39: F8:25:C9:37:09:ED:BD:FE:0E:F2:80:24:F4:FE:E3:9C: AF:67:10:B8:02:21:00:CC:D1:26:D7:74:12:36:D0:D7: C0:ED:2A:F1:57:D6:6D:44:BD:EB:73:84:06:CE:00:6D: B0:81:36:EC:E3:E8:B2 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Aug 3 10:25:25.899 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:40:B8:56:B2:0A:F5:25:87:0F:8E:11:07: 05:7F:45:E6:6B:85:54:74:27:40:02:30:DA:53:B9:92: B0:3D:E7:8E:02:20:79:35:57:1D:E5:2F:2B:74:6C:7E: 30:E5:BB:2A:EE:F7:D9:B1:14:83:EF:63:8E:1B:4C:A5: 29:66:62:5B:04:A9
-----BEGIN CERTIFICATE-----
MIIIrzCCB5egAwIBAgIQDp+sk/QV9l6Bl64xNH1LbzANBgkqhkiG9w0BAQsFADBZ
MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMTMwMQYDVQQDEypE
aWdpQ2VydCBHbG9iYWwgRzIgVExTIFJTQSBTSEEyNTYgMjAyMCBDQTEwHhcNMjYw
ODAzMDAwMDAwWhcNMjcwMjE3MjM1OTU5WjBhMQswCQYDVQQGEwJCRzEUMBIGA1UE
BxMLQmxhZ29ldmdyYWQxKDAmBgNVBAoTH0FtZXJpY2FuIFVuaXZlcnNpdHkgaW4g
QnVsZ2FyaWExEjAQBgNVBAMMCSouYXViZy5iZzCCASIwDQYJKoZIhvcNAQEBBQAD
ggEPADCCAQoCggEBAJZ2VwJsqsy9sWVOZ8PNNDugNOYMZYX8YcYqIhEN8umGGUMA
F5xLmDYk/6RGzIvIm3bqfmbN2NisXYr5JWE8iieeS5+Ocv9DYQBIO6PrkrQdgnxF
+t89enCk6DIA5VaFSjYB3cm0W6XDYGYe76Z6+bbiSXwiP5I+OlJeBb7gbaTQemk/
t39efKNWrBZhzFo+6bwHwqYatsqkOfztJroGkfrPjAxahRzQynn0z2Q7Z6JrdcIz
d2Za5ylcLIPkBfvlt7HIt5E2HNMRTgLaYaeQBQcnrn9b2XrZJQ1IMyv2GU7g0uxi
bF0uRTQqv/CWobaHokuph1AbZtFc0VdpW/WtKkUCAwEAAaOCBWkwggVlMB8GA1Ud
IwQYMBaAFHSFgMBmx9833s+9KTeqAx2+7c0XMB0GA1UdDgQWBBTJvVejRIdjaY4n
V57RlAeJvbQ6SjCCAgIGA1UdEQSCAfkwggH1ggkqLmF1YmcuYmeCC3d3dy5hdWJn
LmJnggxtYWlsLmF1YmcuYmeCFGF1dG9kaXNjb3Zlci5hdWJnLmJnghJsZWdhY3lt
YWlsLmF1YmcuYmeCDWV4Y2ExLmF1YmcuYmeCDWV4Y2EyLmF1YmcuYmeCDWV4bWIx
LmF1YmcuYmeCDWV4bWIyLmF1YmcuYmeCEG5ldHN0YXJ0LmF1YmcuYmeCEW5ldHN0
YXJ0Ni5hdWJnLmJnggt0czMuYXViZy5iZ4INd2VidHMuYXViZy5iZ4IOaXRoZWxw
LmF1YmcuYmeCC2FwcC5hdWJnLmJnggxhcHBzLmF1YmcuYmeCCnNnLmF1YmcuYmeC
D2xpYnJhcnkuYXViZy5iZ4IQbGlicHJveHkuYXViZy5iZ4IPcG9ydGFscy5hdWJn
LmJnghFjb21tdW5pdHkuYXViZy5iZ4IPZnBvcnRhbC5hdWJnLmJngg9zcG9ydGFs
LmF1YmcuYmeCEGludGVybmFsLmF1YmcuYmeCC3JlZy5hdWJnLmJnggxob21lLmF1
YmcuYmeCEnB1cmNoYXNpbmcuYXViZy5iZ4IPcmVwYWlycy5hdWJnLmJngg1jbG91
ZC5hdWJnLmJnghBvd25jbG91ZC5hdWJnLmJnggpmcC5hdWJnLmJnggdhdWJnLmJn
MD4GA1UdIAQ3MDUwMwYGZ4EMAQICMCkwJwYIKwYBBQUHAgEWG2h0dHA6Ly93d3cu
ZGlnaWNlcnQuY29tL0NQUzAOBgNVHQ8BAf8EBAMCBaAwEwYDVR0lBAwwCgYIKwYB
BQUHAwEwgZ8GA1UdHwSBlzCBlDBIoEagRIZCaHR0cDovL2NybDMuZGlnaWNlcnQu
Y29tL0RpZ2lDZXJ0R2xvYmFsRzJUTFNSU0FTSEEyNTYyMDIwQ0ExLTEuY3JsMEig
RqBEhkJodHRwOi8vY3JsNC5kaWdpY2VydC5jb20vRGlnaUNlcnRHbG9iYWxHMlRM
U1JTQVNIQTI1NjIwMjBDQTEtMS5jcmwwgYcGCCsGAQUFBwEBBHsweTAkBggrBgEF
BQcwAYYYaHR0cDovL29jc3AuZGlnaWNlcnQuY29tMFEGCCsGAQUFBzAChkVodHRw
Oi8vY2FjZXJ0cy5kaWdpY2VydC5jb20vRGlnaUNlcnRHbG9iYWxHMlRMU1JTQVNI
QTI1NjIwMjBDQTEtMS5jcnQwDAYDVR0TAQH/BAIwADCCAXwGCisGAQQB1nkCBAIE
ggFsBIIBaAFmAHUATGPcmOWcHauI9h6KPd6uj6tEozd7X5uUw/uhnPzBviYAAAGf
xygpGgAABAMARjBEAiAg8EJUYJkGM5FsHDyMuIAEC5nguWQIR9/euabdaaNBJgIg
Fpx5N7Lw0tW24AWwhSygn8GOQIEBHJtOajc+vS67FSUAdgBEwr0M6RQOZKXJSgGT
ClqhuzWXDgDuERaJaCocRNe1ZgAAAZ/HKClaAAAEAwBHMEUCIA0z/0pX1DAGcbxL
OfglyTcJ7b3+DvKAJPT+45yvZxC4AiEAzNEm13QSNtDXwO0q8VfWbUS963OEBs4A
bbCBNuzj6LIAdQAcn2gs6frwRWlQ+BuWiofd2zIQ2EzmyLLjglJKxM9ZnwAAAZ/H
KCmLAAAEAwBGMEQCIEC4VrIK9SWHD44RBwV/ReZrhVR0J0ACMNpTuZKwPeeOAiB5
NVcd5S8rdGx+MOW7Ku732bEUg+9jjhtMpSlmYlsEqTANBgkqhkiG9w0BAQsFAAOC
AQEAtLuRIwSIStCgMG70ry/Va0+Sus0SqdtzANbwKNcOa3iV8B95MwP0gAa5EEqH
A13CHpFgdg/t1X1zGcRZmLC8894z0JPi/QEuqZxZaReaCaEajyTYoTqmOLvuKqZi
udJitbaEoDN4tneHnH6t53I9FFG16H1PSTPMQfO0W9EYWaYJNWcsH55tyXaxtmC6
keSjQjRFKzgQaE/90SfrfHRyAmt/wThdnKTsbUb61Akr/FOkt/ULbRtffEFFrcnH
OBei8tFMj1i2/qDqt3lDb15nvx/h2fXqkdZkcTHjqUapCGCJO6p8lBVb0eGqDq6l
DuwkisOMJR03dIypgcGIiMRneA==
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-13T04:13:22+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2021-03-30T00:00:00+00:00
Expires
2031-03-29T23:59:59+00:00
Days remaining
1628
Serial (hex)
0CF5BD062B5602F47AB8502C23CCF066
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C8:02:5F:9F:C6:5F:DF:C9:5B:3C:A8:CC:78:67:B9:A5:87:B5:27:79:73:95:79:17:46:3F:C8:13:D0:B6:25:A9
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
74:85:80:C0:66:C7:DF:37:DE:CF:BD:29:37:AA:03:1D:BE:ED:CD:17
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/DigiCertGlobalRootG2.crt
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.2.3
-----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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