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

hs-esslingen.de · 134.108.34.3:443

Verified

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

Subject
C=DE ST=Baden-Wuerttemberg O=Hochschule Esslingen CN=www.hs-esslingen.de
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS ECC 1
Valid from
2026-03-04T18:36:02+00:00
Expires
2027-03-04T18:36:02+00:00
Days remaining
149
Serial (hex)
2B147FE2C7EF3E6C7CC43D00ABCFBB33
Signature
ecdsa-with-SHA384
Public key
EC 256 prime256v1

Subject alternative names (SAN)

DNS:www.hs-esslingen.de, DNS:release.www.hs-esslingen.de, DNS:hs-esslingen.de

SHA-256 fingerprint

ED:7E:04:F0:07:F7:BF:15:3E:F1:12:36:2E:8A:E3:97:5A:CC:B4:4C:C6:3C:06:E6:DB:25:3E:2F:19:64:39:A9
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 OCSP - URI:http://ocsp-tls.harica.gr
subjectAltName
DNS:www.hs-esslingen.de, DNS:release.www.hs-esslingen.de, DNS:hs-esslingen.de
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
29:07:D0:17:E2:97:ED:71:D0:79:F0:30:7A:E8:DE:98:D3:68:25:EA
keyUsage
Digital Signature
ct_precert_scts
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 : Mar 4 18:46:03.613 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7A:32:84:F5:11:50:16:FC:C2:28:6C:73: B2:4B:6B:C5:B1:7B:1D:8F:54:06:76:87:59:7A:13:47: 52:23:80:6E:02:21:00:96:A4:05:21:3E:3A:76:D2:2F: EE:B1:95:0D:72:C0:EC:33:20:F6:0E:27:F4:70:81:3D: AC:37:E2:E1:CD:42:39 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 : Mar 4 18:46:03.564 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:9E:CC:EF:EA:7F:FB:BD:AF:20:4E:F2: 62:D5:F7:95:35:B1:40:95:B4:70:CC:8D:71:DB:5A:47: C0:4F:FB:77:BA:02:21:00:94:E9:BA:34:AA:1A:5F:31: 79:9D:EA:B5:3D:F4:E9:91:E3:3C:96:F0:67:32:02:F1: 7E:9F:7F:A3:01:FB:30:91 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 : Mar 4 18:46:03.675 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:EC:C4:17:36:08:99:85:C8:C9:10:14: 48:A2:7E:B9:7C:57:32:C2:93:20:01:9C:81:5F:54:78: 17:92:D1:F4:1D:02:20:07:26:8C:EC:4B:66:12:9B:98: 95:68:0C:48:9B:A9:6E:06:D7:A4:EC:4D:B3:5B:6C:81: 13:62:2B:A7:E2:A1:52
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-06T17:16:38+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
4833
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
1059
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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