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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

ua.pt · 193.136.173.58:443

Verified

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

Subject
C=PT L=Aveiro O=Universidade de Aveiro CN=www.ua.pt
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2025-12-03T14:11:18+00:00
Expires
2026-12-03T14:11:18+00:00
Days remaining
60
Serial (hex)
6C0BE956A8CB420AE78434DCC8A8C099
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:www.ua.pt, DNS:ua.pt

SHA-256 fingerprint

BC:C8:88:3E:65:CD:B5:02:85:42:AC:41:A3:0D:4A:B6:F6:EF:F5:94:75:A8:3F:3D:D5:04:A1:C5:81:EC:58:E2
Certificate extensions & PEM
authorityKeyIdentifier
E9:99:06:8D:17:1F:AB:FB:96:1A:5A:C8:5B:5E:5D:5E:EC:DA:9C:8F
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-E1.cer OCSP - URI:http://ocsp-tls.harica.gr
subjectAltName
DNS:www.ua.pt, DNS:ua.pt
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.26513.1.1.1.2
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-E1.crl
subjectKeyIdentifier
6C:B3:17:EA:83:B0:60:0C:A4:F6:F1:CC:B3:D8:0F:E4:C8:EE:3C:5B
keyUsage
Digital Signature
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Dec 3 14:21:22.838 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:70:C9:34:E6:5B:0A:AD:18:4C:B1:2E:1C: 1F:95:FC:D7:0E:5B:E5:8B:79:92:9E:20:6B:25:B1:13: 6E:96:CA:77:02:20:1C:63:48:9D:33:AE:01:62:CF:03: FC:CA:FF:98:D4:22:97:9B:17:D7:1A:52:A3:A3:35:F1: 4A:D9:23:48:8B:99 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D8:09:55:3B:94:4F:7A:FF:C8:16:19:6F:94:4F:85:AB: B0:F8:FC:5E:87:55:26:0F:15:D1:2E:72:BB:45:4B:14 Timestamp : Dec 3 14:21:22.796 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:19:6D:56:B1:0F:5A:7F:F4:31:8F:27:26: 06:C5:72:28:74:13:42:F5:A1:28:8C:57:62:CB:A4:F3: CE:7F:E3:41:02:20:02:B9:4F:37:DB:93:C5:7A:07:1E: 30:6E:13:73:A1:FA:AD:38:EC:90:A9:F2:B1:39:83:D9: 79:92:43:7A:01:88 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AC:AB:30:70:6C:EB:EC:84:31:F4:13:D2:F4:91:5F:11: 1E:42:24:43:B1:F2:A6:8C:4F:3C:2B:3B:A7:1E:02:C3 Timestamp : Dec 3 14:21:22.849 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:10:D6:90:74:24:E3:0D:CC:71:97:4A:B8: 34:F5:14:0A:8B:9F:47:5F:C5:C7:F8:7D:3C:C3:85:52: 80:F8:0D:6D:02:21:00:F2:C9:B6:9F:32:1D:A7:93:28: C7:51:31:37:B0:5E:D5:B3:3B:30:8D:B2:06:54:CD:86: 7D:10:4D:17:9A:EE:39
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: ECDHE-ECDSA-AES256-GCM-SHA384 · Checked 2026-10-04T10:02:35+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS ECC Root CA 2021
Valid from
2025-01-03T11:14:21+00:00
Expires
2039-12-31T11:14:20+00:00
Days remaining
4836
Serial (hex)
42FDDCE1261607E1A5E6935A400161DD
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

6C:DF:0B:A1:71:1E:85:6D:22:8B:A0:0C:A0:4C:5C:1C:3D:79:94:4C:03:7B:71:3B:15:5A:4E:E4:B4:7E:C5:3C
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
C9:1B:53:81:12:FE:04:D5:16:D1:AA:BC:9A:6F:B7:A0:95:19:6E:CA
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-ECC.cer
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-TLS-Root-2021-ECC.crl
subjectKeyIdentifier
E9:99:06:8D:17:1F:AB:FB:96:1A:5A:C8:5B:5E:5D:5E:EC:DA:9C:8F
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Chain certificate 2

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS ECC Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions ECC RootCA 2015
Valid from
2021-09-02T07:44:37+00:00
Expires
2029-08-31T07:44:36+00:00
Days remaining
1061
Serial (hex)
716027C8857A73542DEF516C1C2EEB0F
Signature
ecdsa-with-SHA384
Public key
EC 384 secp384r1

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

50:E2:7F:90:EB:6A:F4:95:B0:E6:EE:B6:55:CC:89:44:4C:27:D3:C9:5B:68:23:FA:02:AB:DC:95:F1:63:6A:E1
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
B4:22:0B:82:99:24:01:0E:9C:BB:E4:0E:FD:BF:FB:97:20:93:99:2A
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaECCRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaECCRootCA2015.crl
subjectKeyIdentifier
C9:1B:53:81:12:FE:04:D5:16:D1:AA:BC:9A:6F:B7:A0:95:19:6E:CA
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----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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