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-offenburg.de · 54.36.113.235:443

Verified

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

Subject
C=DE ST=Baden-Wuerttemberg O=Hochschule Offenburg CN=magma.hs-offenburg.de
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Valid from
2026-07-24T11:31:52+00:00
Expires
2027-02-08T11:31:51+00:00
Days remaining
115
Serial (hex)
1AAEECF55A6B90518A4145EAD1204562
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:magma.hs-offenburg.de, DNS:imla.hs-offenburg.de, DNS:qualitaetsmanagement.hs-offenburg.de, DNS:sweaty.hs-offenburg.de, DNS:studiumplus.hs-offenburg.de, DNS:gleichstellung.hs-offenburg.de, DNS:medien.hs-offenburg.de, DNS:ibms.hs-offenburg.de, DNS:aci.hs-offenburg.de, DNS:iuas.hs-offenburg.de, DNS:asta.hs-offenburg.de, DNS:robocup.hs-offenburg.de, DNS:ines.hs-offenburg.de, DNS:wlri.hs-offenburg.de, DNS:obarro.hs-offenburg.de, DNS:www.hs-offenburg.de, DNS:ivesk.hs-offenburg.de, DNS:nachhaltigkeit.hs-offenburg.de, DNS:riz.hs-offenburg.de, DNS:verein-der-freunde.hs-offenburg.de, DNS:starting.hs-offenburg.de, DNS:hs-offenburg.de, DNS:cit.hs-offenburg.de, DNS:opac.hs-offenburg.de, DNS:cello.hs-offenburg.de, DNS:emi.hs-offenburg.de, DNS:career-center.hs-offenburg.de, DNS:www.ines.hs-offenburg.de, DNS:schluckspecht.hs-offenburg.de, DNS:edufablab.hs-offenburg.de, DNS:mv.hs-offenburg.de, DNS:poim.hs-offenburg.de, DNS:bw.hs-offenburg.de, DNS:schule.hs-offenburg.de, DNS:ogflab.hs-offenburg.de

SHA-256 fingerprint

6D:4E:77:7A:DE:77:07:89:8D:FC:54:6A:0A:B2:05:28:F0:D4:12:20:F5:4D:F2:EE:33:17:55:36:33:33:47:AD
Certificate extensions & PEM
basicConstraints
CA:FALSE
authorityKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-GEANT-TLS-R1.cer
subjectAltName
DNS:magma.hs-offenburg.de, DNS:imla.hs-offenburg.de, DNS:qualitaetsmanagement.hs-offenburg.de, DNS:sweaty.hs-offenburg.de, DNS:studiumplus.hs-offenburg.de, DNS:gleichstellung.hs-offenburg.de, DNS:medien.hs-offenburg.de, DNS:ibms.hs-offenburg.de, DNS:aci.hs-offenburg.de, DNS:iuas.hs-offenburg.de, DNS:asta.hs-offenburg.de, DNS:robocup.hs-offenburg.de, DNS:ines.hs-offenburg.de, DNS:wlri.hs-offenburg.de, DNS:obarro.hs-offenburg.de, DNS:www.hs-offenburg.de, DNS:ivesk.hs-offenburg.de, DNS:nachhaltigkeit.hs-offenburg.de, DNS:riz.hs-offenburg.de, DNS:verein-der-freunde.hs-offenburg.de, DNS:starting.hs-offenburg.de, DNS:hs-offenburg.de, DNS:cit.hs-offenburg.de, DNS:opac.hs-offenburg.de, DNS:cello.hs-offenburg.de, DNS:emi.hs-offenburg.de, DNS:career-center.hs-offenburg.de, DNS:www.ines.hs-offenburg.de, DNS:schluckspecht.hs-offenburg.de, DNS:edufablab.hs-offenburg.de, DNS:mv.hs-offenburg.de, DNS:poim.hs-offenburg.de, DNS:bw.hs-offenburg.de, DNS:schule.hs-offenburg.de, DNS:ogflab.hs-offenburg.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-R1.crl
subjectKeyIdentifier
DC:37:E9:BE:09:E5:4D:C8:87:6D:F6:34:5D:81:2A:5A:04:16:09:3F
keyUsage
Digital Signature, Key Encipherment
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 : Jul 24 11:41:54.429 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:EB:41:EB:99:D8:8D:43:33:25:8B:79: F8:2C:D8:25:15:4D:BF:0B:A2:4B:F5:77:CD:0D:73:23: 31:8D:47:D3:9C:02:20:2F:E9:89:CE:ED:BD:6E:03:B4: 8E:8A:9E:62:40:A6:CC:AD:F4:42:05:12:D9:F6:44:9D: 0A:AB:25:23:C9:26:FF 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 : Jul 24 11:41:54.440 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:CF:7B:48:ED:80:41:F5:2D:CE:9D:6C: 92:51:6E:2F:6B:1F:3E:81:EE:13:28:7B:47:46:67:6F: 69:81:94:EC:B3:02:21:00:DE:6D:68:1B:B0:35:88:E8: 61:12:D2:0D:9B:03:46:63:5A:06:0B:14:66:58:85:79: 41:07:06:06:7D:CC:2A:59 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 : Jul 24 11:41:54.383 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:03:70:CE:6F:4A:82:E9:D2:B4:1E:47:21: BB:E4:DB:31:8B:66:A2:B6:A0:23:11:2A:2A:72:90:35: 28:31:DE:D8:02:20:07:50:B5:5C:BF:E5:C8:23:15:21: D9:C0:04:63:9D:7D:CC:A0:BF:F5:E5:AE:02:9E:79:DC: 82:4F:A8:05:02:3D
-----BEGIN CERTIFICATE-----
MIIK/TCCCWWgAwIBAgIQGq7s9VprkFGKQUXq0SBFYjANBgkqhkiG9w0BAQsFADBg
MQswCQYDVQQGEwJHUjE3MDUGA1UECgwuSGVsbGVuaWMgQWNhZGVtaWMgYW5kIFJl
c2VhcmNoIEluc3RpdHV0aW9ucyBDQTEYMBYGA1UEAwwPR0VBTlQgVExTIFJTQSAx
MB4XDTI2MDcyNDExMzE1MloXDTI3MDIwODExMzE1MVowaTELMAkGA1UEBhMCREUx
GzAZBgNVBAgMEkJhZGVuLVd1ZXJ0dGVtYmVyZzEdMBsGA1UECgwUSG9jaHNjaHVs
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DQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBANrSOUW6oQUwjFp+y7qTSjdbkAP0
45Q5hNkDFBuBxBzedRF2Aaan89esnpHV5fSnWGQgKhiXlOTb9yaG9NNuzCgzODLA
CwshStas3eFjf2yUr7xEZEoc8tsYSmiI3mNWssmUrgc0HDPBbuv2eTlCCJ9ZSQsa
9uCcmlJdksX5VdBJkVWXIKaRZT0XTNc7WSXK8LU4bhzBooCj20AfVjvkAw0WKvKU
M1Tdvxyw1r8xzol+iFYHqKvIyVEbJNCLhubrOPjBJ5iWzujmqzwx9N2POM2oaK3I
pPPaLtypjerSbq3v0LeUb7ZQ5Y8axEAHqbcp/WkQs6yRoGZUuiQWy5Hae3aA6sbm
XFdFBcRi1ahfe4vM0DUW76T82KVdzDbqAm7CZK4nkmBC3ml6/rsgdzt7OKNDJZ7K
ML4onhvnjqskyp+yElbYDin+6LA5TQCD9gY3ASp+CxC4u53anUYoqV3h+QvkvOBc
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hKT53hUbpEW2xW2NuTEkXdUyHMGGTCPibBrbc8LE+/2oqsDfNK7yKJnO9KYMDtpU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LW9mZmVuYnVyZy5kZYIYd3d3LmluZXMuaHMtb2ZmZW5idXJnLmRlgh1zY2hsdWNr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gunStB5HIbvk2zGLZqK2oCMRKipykDUoMd7YAiAHULVcv+XIIxUh2cAEY519zKC/
9eWuAp553IJPqAUCPTANBgkqhkiG9w0BAQsFAAOCAYEAJto+rSuFH9KM4jqFkBzR
jxhJhyoeK0vqt9Whlif4WrehhprQT5IWBuRNeMX8XTed024Jy4nC2MHACZNPmxc9
fHaB6i/JnWnQM1FkGokasRpjDSxxoR5Q9HTkNhz3aH6NviSbNdGFIaGzqFPUPsz+
v1IGPNtUoGLm9jRhRoagT0Hmb2VDlAtFUQCp+excpskjVp5s3zJ088VUNS6qR0kg
zdoFPP3vlekmhjtzptRWWzxQGWchLxGzS4fqlSzlodYReaSRKShCvm+fXLfb/E1Z
wuCjljKgSRD5uxPwdpnLci+FlzrCDBHJVOTnPFsNouKvUIvyCMMt5cYYoU2zASaA
1/hlotHzeed/EsCdf0wNKg9JvTSNUqXU4YZ+T+FLREf/EpSROKosYJPHmkG9azfX
J+vO741p+hDh8+TWjI/Conuh4mJ5sF9jTsepbmihPQ/pDINYfNQN0QiEvcjx7LmL
dyUbsrNfUi/LoKPFPuDSeb0q6UejYSvX/YXYjXoI6KZ4
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-15T16:32:35+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=GR O=Hellenic Academic and Research Institutions CA CN=GEANT TLS RSA 1
Issuer
C=GR O=Hellenic Academic and Research Institutions CA CN=HARICA TLS RSA Root CA 2021
Valid from
2025-01-03T11:15:00+00:00
Expires
2039-12-31T11:14:59+00:00
Days remaining
4824
Serial (hex)
14D57BF3692228219A5567FA91651B22
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

5B:67:8D:C4:40:95:A5:28:95:B6:3B:31:F2:72:27:F4:B3:6C:3E:34:74:91:BF:2B:FA:69:18:37:A5:FB:8C:79
Certificate extensions & PEM
basicConstraints
CA:TRUE, pathlen:0
authorityKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
authorityInfoAccess
CA Issuers - URI:http://crt.harica.gr/HARICA-TLS-Root-2021-RSA.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-RSA.crl
subjectKeyIdentifier
86:01:72:3F:8C:A9:70:E2:31:06:53:16:CE:01:5F:5B:79:C8:3C:3B
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 RSA Root CA 2021
Issuer
C=GR L=Athens O=Hellenic Academic and Research Institutions Cert. Authority CN=Hellenic Academic and Research Institutions RootCA 2015
Valid from
2021-09-02T07:41:55+00:00
Expires
2029-08-31T07:41:54+00:00
Days remaining
1050
Serial (hex)
2A6086D4D4DE45C95E4B98FBBF2FBF26
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

4A:CD:8D:C6:02:0A:54:5A:85:89:43:A5:53:B5:E0:F3:FC:5B:85:9A:EA:17:46:65:0D:69:CF:12:10:F9:56:D8
Certificate extensions & PEM
basicConstraints
CA:TRUE
authorityKeyIdentifier
71:15:67:C8:C8:C9:BD:75:5D:72:D0:38:18:6A:9D:F3:71:24:54:0B
authorityInfoAccess
CA Issuers - URI:http://repo.harica.gr/certs/HaricaRootCA2015.crt
certificatePolicies
Policy: X509v3 Any Policy
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
crlDistributionPoints
Full Name: URI:http://crl.harica.gr/HaricaRootCA2015.crl
subjectKeyIdentifier
0A:48:23:A6:60:A4:92:0A:33:EA:93:5B:C5:57:EA:25:4D:BD:12:EE
keyUsage
Digital Signature, Certificate Sign, CRL Sign
-----BEGIN CERTIFICATE-----
MIIGwDCCBKigAwIBAgIQKmCG1NTeRcleS5j7vy+/JjANBgkqhkiG9w0BAQsFADCB
pjELMAkGA1UEBhMCR1IxDzANBgNVBAcTBkF0aGVuczFEMEIGA1UEChM7SGVsbGVu
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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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