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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

TLSv1.3

kth.se · 130.237.28.40:443

Verified

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

Subject
CN=ns-vip-01.sys.kth.se
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2026-08-12T07:45:30+00:00
Expires
2027-02-27T07:45:29+00:00
Days remaining
153
Serial (hex)
5569C4BDDFB71FB478A710B09DE8EC4D
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:ns-vip-01.sys.kth.se, DNS:www.kth.se, DNS:kth.se

SHA-256 fingerprint

6E:AC:25:1C:CC:F5:86:79:2F:D5:18:DE:D8:D7:01:B2:A5:CF:22:D9:94:9C:FF:56:DB:6F:31:FD:3F:A9:A9:CA
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
subjectAltName
DNS:ns-vip-01.sys.kth.se, DNS:www.kth.se, DNS:kth.se
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 0.4.0.2042.1.6 Policy: 1.3.6.1.4.1.26513.1.1.1.1
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HARICA-GEANT-TLS-E1.crl
subjectKeyIdentifier
F7:C5:BA:6E:5F:2B:C2:FF:D5:C2:76:3C:ED:AC:A0:59:BD:AD:D4:BC
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 12 07:55:31.544 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:75:E6:3F:C9:F7:35:71:E4:F0:23:78:56: 10:0E:C2:D5:0D:F5:BB:F9:09:0F:92:39:39:BB:25:61: FE:79:8D:35:02:20:44:21:CF:14:09:F9:1F:CE:C1:91: 97:AF:22:61:A6:6F:96:B2:F1:1D:A9:B8:A9:88:1C:66: C2:BC:47:C8:EA:19 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 : Aug 12 07:55:31.579 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:72:DC:1A:B1:2D:78:A4:6A:91:81:92:1D: C8:4F:69:1B:64:99:C1:AF:0B:A8:0C:F9:0F:F7:37:0C: 2B:B2:7A:3D:02:21:00:EE:3E:47:2A:07:06:51:4E:E7: 16:CC:B7:B0:EB:2D:93:44:A9:92:C8:7C:A4:6A:D9:4E: 9A:99:1C:2E:DB:17:EF 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 12 07:55:31.530 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A9:95:A9:7E:26:BE:77:0C:5C:9D:B6: AE:AC:8E:8A:53:73:A3:EA:5E:72:15:A2:4A:C1:27:27: 31:BE:C3:51:A9:02:21:00:A8:59:E1:F0:A6:7E:27:F6: B4:6E:1A:6F:F6:D7:64:7E:61:8C:B4:03:10:91:47:29: 3A:9B:AE:EA:8A:47:59:CC
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_CHACHA20_POLY1305_SHA256 · Checked 2026-09-26T12:00:04+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
4843
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
1069
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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