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-albsig.de · 93.191.51.154:443

Verified

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

Subject
CN=hs-albsig.de
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-01T18:27:10+00:00
Expires
2026-12-30T18:27:09+00:00
Days remaining
86
Serial (hex)
0659536B23168DA8C43075DB174A490A2E89
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:hs-albsig.de, DNS:karriere.hs-albsig.de, DNS:weiterbildung.hs-albsig.de, DNS:www.hs-albsig.de

SHA-256 fingerprint

02:CE:63:FD:31:79:AC:8A:54:58:AE:8B:50:1E:28:D9:B7:CA:DB:EE:0A:AC:B5:C2:7A:FC:A2:3D:F3:00:81:82
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
1A:A4:72:2B:1F:6E:7F:1A:78:E1:EE:F8:6F:2B:87:28:BF:46:74:C3
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:hs-albsig.de, DNS:karriere.hs-albsig.de, DNS:weiterbildung.hs-albsig.de, DNS:www.hs-albsig.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/10.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : CB:38:F7:15:89:7C:84:A1:44:5F:5B:C1:DD:FB:C9:6E: F2:9A:59:CD:47:0A:69:05:85:B0:CB:14:C3:14:58:E7 Timestamp : Oct 1 19:25:40.862 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:06:52:3C:31:9E:B6:63:DC:79:13:83:B6: DC:BF:CA:EC:13:93:D0:2D:CF:94:A5:8B:D9:3F:F6:7D: 36:8C:DA:BA:02:21:00:DA:99:D2:C9:3B:2C:46:22:2A: CC:E4:ED:32:9E:D8:0B:6C:AA:28:B5:BF:79:DC:46:0B: 76:FD:6D:06:51:70:A1 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Oct 1 19:25:40.862 2026 GMT Extensions: 00:00:05:00:19:AA:95:BF Signature : ecdsa-with-SHA256 30:45:02:21:00:9C:A2:03:F6:33:E6:54:B2:91:39:FE: CB:5F:C1:1E:C6:39:43:F0:4B:78:FF:62:D1:BB:EA:86: 7C:2A:EA:F9:CC:02:20:10:E7:E4:41:24:6C:84:94:B1: 91:25:97:C9:14:F5:E7:9E:D2:57:69:E1:AE:07:2D:2D: 69:62:60:E5:04:E8:7B
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-05T16:38:59+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
698
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----
MIIE2zCCAsOgAwIBAgIRAKICU/FfJpHAXcHOE7m8yk4wDQYJKoZIhvcNAQELBQAw
LjELMAkGA1UEBhMCVVMxDTALBgNVBAoTBElTUkcxEDAOBgNVBAMTB1Jvb3QgWVIw
HhcNMjUwOTAzMDAwMDAwWhcNMjgwOTAyMjM1OTU5WjAzMQswCQYDVQQGEwJVUzEW
MBQGA1UEChMNTGV0J3MgRW5jcnlwdDEMMAoGA1UEAxMDWVIxMIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoVi8X2xCYgMXvJxNPKp/oF13UMgmPABB07VC
LNDtoXmt9luEZNJSBV10VyT1Pz6LD8Zq1d2gc43WNl1AdRrj4sEnazbOiz0nPpmG
Bp2hui49oZtDIY6wdKeZAi5BbNU20CH6RSBBMLSQ9cXrH8dxdv4PAJ45ssGML68U
SE3BsjC2a6cAN9L5CgXVIQi5tfNiTPoFZZ3S0OlXqLmmtdV95udWAb5b6e/F49Di
CsH0Y00Ag72BVIb1hzynmKe+X0mERBTtsb3BwmpV9ipeBjMLoR/D9cHxHQCWoi5l
TmXwY015J5rGelz1nZjJuxc2kioaX29XJBnhMkP531rSdG5uMwIDAQABo4HuMIHr
MA4GA1UdDwEB/wQEAwIBhjATBgNVHSUEDDAKBggrBgEFBQcDATASBgNVHRMBAf8E
CDAGAQH/AgEAMB0GA1UdDgQWBBQfLzW+RhSCzUCxrnksVXj699Ro+zAfBgNVHSME
GDAWgBTe51tg0CJtQCh9Pw0B/qS1UrRRlDAyBggrBgEFBQcBAQQmMCQwIgYIKwYB
BQUHMAKGFmh0dHA6Ly95ci5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwB
AgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3lyLmMubGVuY3Iub3JnLzANBgkq
hkiG9w0BAQsFAAOCAgEA0+zvMq3kHig1ddTmmm+RibTr9/RpX7k4buanMMRqbV/y
IvP82zAHN3mvaw+cASuVsdpd0ikjhr4hnhJQLQOzOp2ccKrsdGOAgo0vddeISFAq
EWEV4lmUM3vFF796up+bSgmJ1u6RupDCMxDgF8M3eLvGuj6L0lu3zkQ0KuQLnKxL
tB0oQqn1Idg5CuuGpMvQzk29Pa3D/qHurc0EIM9SxukQuJqq63lxsYyRQFU8yMBO
hq1w5LbfaWNRrz1uklOfI/pYkAb2E2MTZrAMQkBIE2S8Jt1F8gRc96o/xOsrgvSk
a84AisX6xq1lz1Z7jGvrnXc4TMcjxZTjiTaihcYI1JIXZiLtEMSCa5l3cu8YWd6z
dLRQlqRdclVjuQfNHawRJ6GWlkK0QJosivTKwdBw3KxEtzGo8yMHERbsy57gP1UX
HOMcmZYQC0gtyR3SxfenIM/MxC3Ia2Ypab/kQ/CTnlIn2KQ5JUC6NYrGCbhFN9bp
5lKJStEwCUnLpntcrXk5XVDCNv/5RyWpRThkGOV7GetKkQ0qAY8hCzWK6oqnAhDZ
cjlYVdWfqOw3DIOX6EDNBgAqHarRVxyF9QZdOaXSyPJ0ueD2BYJEBgaCGQ8rAaU/
Qc123V5LTXDZW4CcsPBDyhy4v+c8hClAyw/IkJlfBqxB9D+/wvIMHgECZ4ptP6o=
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2159
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----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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