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

uio.no · 129.240.118.130:443

Verified

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

Subject
C=NO ST=Oslo O=Universitetet i Oslo CN=uio.no
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2026-08-17T08:08:09+00:00
Expires
2027-03-04T08:08:08+00:00
Days remaining
154
Serial (hex)
24B4ADC28195352B7E0366D7FF2A96FD
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:uio.no, DNS:www.uio.no, DNS:www-int.uio.no

SHA-256 fingerprint

3D:76:2B:B8:10:FF:9F:68:CF:3C:40:B8:E3:36:B5:D4:1A:E7:29:D3:97:32:1F:46:FA:7A:56:C0:7B:D5:47:97
Certificate extensions & PEM
basicConstraints
CA:FALSE
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
subjectAltName
DNS:uio.no, DNS:www.uio.no, DNS:www-int.uio.no
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
82:AD:8F:04:89:FA:B3:79:E8:72:9D:FB:03:4F:82:61:4E:99:EF:02
keyUsage
Digital Signature
ct_precert_scts
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 : Aug 17 08:18:10.997 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:5C:C8:EE:27:6C:32:C2:21:22:17:E7:17: F5:44:94:85:59:2D:16:53:75:F4:2A:68:12:0C:8E:BC: F1:FD:10:2B:02:20:48:1C:B9:20:28:95:03:EE:02:0C: 27:68:5E:D0:67:FB:7B:64:78:C3:9F:E9:A3:86:DF:2D: A1:FA:1A:DA:5F:D5 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 : Aug 17 08:18:11.028 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A3:98:44:BD:52:2B:DD:00:36:B2:80: 1F:D2:08:A1:0C:19:70:15:8B:BA:39:33:0F:7E:6F:D5: 88:0C:91:E7:09:02:20:6A:DE:4F:92:DA:64:4D:A1:24: 24:BD:80:5F:EE:5B:D4:5B:B3:C2:91:A2:97:44:F1:41: 25:4D:1F:AC:68:E9:0C 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 17 08:18:10.986 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A7:F0:DA:C5:51:BA:CD:BC:CF:C6:D4: 6D:04:9D:E3:C7:13:CF:D7:1F:88:F3:A1:B7:52:D1:36: 53:E5:51:1C:60:02:20:6B:2A:2F:86:E4:40:7F:3D:ED: 4C:B5:5C:1B:77:BA:A0:9F:0F:29:FC:9B:0C:F9:DD:6E: 50:D8:0D:72:F7:CD:55
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_CHACHA20_POLY1305_SHA256 · Checked 2026-09-30T12:06:56+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
4839
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
1065
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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