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

denic.de · 81.91.170.12:443

Verified

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

Subject
CN=denic.de
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-01T07:25:02+00:00
Expires
2026-12-30T07:25:01+00:00
Days remaining
54
Serial (hex)
0679D3E3BA4D344B4674050A307B5A0C0A95
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.adm.denic.de, DNS:*.ams1.adm.denic.de, DNS:*.ams1.dev.denic.de, DNS:*.ams1.prod.denic.de, DNS:*.beta.denic.de, DNS:*.cloud.denic.de, DNS:*.cons.denic.de, DNS:*.denic-services.com, DNS:*.denic-services.de, DNS:*.denic.de, DNS:*.denic.net, DNS:*.denic.online, DNS:*.dev.cloud.denic.de, DNS:*.dev.denic.de, DNS:*.digital-escrow.at, DNS:*.digital-escrow.ch, DNS:*.eine-gute-domain.de, DNS:*.einegutedomain.de, DNS:*.enum.denic.de, DNS:*.escrow-digital.at, DNS:*.escrow-digital.ch, DNS:*.escrow-digital.com, DNS:*.escrow-digital.de, DNS:*.escrow4ntld.com, DNS:*.escrow4ntlds.com, DNS:*.ew.osl.denic.de, DNS:*.exmon.denic.de, DNS:*.fra1.adm.denic.de, DNS:*.fra1.dev.denic.de, DNS:*.fra1.osl.denic.de, DNS:*.fra1.prod.denic.de, DNS:*.fra2.adm.denic.de, DNS:*.fra2.osl.denic.de, DNS:*.fra2.prod.denic.de, DNS:*.fra3.adm.denic.de, DNS:*.fra3.dev.denic.de, DNS:*.fra3.prod.denic.de, DNS:*.gcp.dev.denic.de, DNS:*.gcp.prod.denic.de, DNS:*.ha.mtest.denic.de, DNS:*.ha.prod.denic.de, DNS:*.ha.qa2.stage.denic.de, DNS:*.ha.stage.denic.de, DNS:*.id-denic.de, DNS:*.iddenic.de, DNS:*.if.denic.de, DNS:*.infra.dev.denic.de, DNS:*.infra.prod.denic.de, DNS:*.infra.stage.denic.de, DNS:*.infs.denic.de, DNS:*.int-t.denic.de, DNS:*.iscsi.denic.de, DNS:*.mtest.denic.de, DNS:*.nic.de, DNS:*.nsl.denic.de, DNS:*.office.denic.de, DNS:*.osl.denic.de, DNS:*.pentest.denic.de, DNS:*.prod.denic.de, DNS:*.rri.denic.de, DNS:*.rz.denic.de, DNS:*.rz2012.adm.denic.de, DNS:*.secure.denic.de, DNS:*.stage.denic.de, DNS:*.start-your-domain.de, DNS:*.svc.denic.de, DNS:*.test.denic.de, DNS:*.transit.denic.de, DNS:denic-services.com, DNS:denic-services.de, DNS:denic.de, DNS:denic.net, DNS:denic.online, DNS:digital-escrow.at, DNS:digital-escrow.ch, DNS:eine-gute-domain.de, DNS:einegutedomain.de, DNS:escrow-digital.at, DNS:escrow-digital.ch, DNS:escrow-digital.com, DNS:escrow-digital.de, DNS:escrow4ntld.com, DNS:escrow4ntlds.com, DNS:nic.de, DNS:start-your-domain.de

SHA-256 fingerprint

BD:EE:0D:18:92:93:5B:99:00:A7:EB:4A:F5:9A:39:BB:BC:53:4D:6B:2F:C3:E9:04:A1:EE:E1:BC:BF:47:70:16
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
FA:A6:5C:E8:E1:58:B7:89:4A:80:BF:F7:D0:99:D8:15:4F:BC:1E:66
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:*.adm.denic.de, DNS:*.ams1.adm.denic.de, DNS:*.ams1.dev.denic.de, DNS:*.ams1.prod.denic.de, DNS:*.beta.denic.de, DNS:*.cloud.denic.de, DNS:*.cons.denic.de, DNS:*.denic-services.com, DNS:*.denic-services.de, DNS:*.denic.de, DNS:*.denic.net, DNS:*.denic.online, DNS:*.dev.cloud.denic.de, DNS:*.dev.denic.de, DNS:*.digital-escrow.at, DNS:*.digital-escrow.ch, DNS:*.eine-gute-domain.de, DNS:*.einegutedomain.de, DNS:*.enum.denic.de, DNS:*.escrow-digital.at, DNS:*.escrow-digital.ch, DNS:*.escrow-digital.com, DNS:*.escrow-digital.de, DNS:*.escrow4ntld.com, DNS:*.escrow4ntlds.com, DNS:*.ew.osl.denic.de, DNS:*.exmon.denic.de, DNS:*.fra1.adm.denic.de, DNS:*.fra1.dev.denic.de, DNS:*.fra1.osl.denic.de, DNS:*.fra1.prod.denic.de, DNS:*.fra2.adm.denic.de, DNS:*.fra2.osl.denic.de, DNS:*.fra2.prod.denic.de, DNS:*.fra3.adm.denic.de, DNS:*.fra3.dev.denic.de, DNS:*.fra3.prod.denic.de, DNS:*.gcp.dev.denic.de, DNS:*.gcp.prod.denic.de, DNS:*.ha.mtest.denic.de, DNS:*.ha.prod.denic.de, DNS:*.ha.qa2.stage.denic.de, DNS:*.ha.stage.denic.de, DNS:*.id-denic.de, DNS:*.iddenic.de, DNS:*.if.denic.de, DNS:*.infra.dev.denic.de, DNS:*.infra.prod.denic.de, DNS:*.infra.stage.denic.de, DNS:*.infs.denic.de, DNS:*.int-t.denic.de, DNS:*.iscsi.denic.de, DNS:*.mtest.denic.de, DNS:*.nic.de, DNS:*.nsl.denic.de, DNS:*.office.denic.de, DNS:*.osl.denic.de, DNS:*.pentest.denic.de, DNS:*.prod.denic.de, DNS:*.rri.denic.de, DNS:*.rz.denic.de, DNS:*.rz2012.adm.denic.de, DNS:*.secure.denic.de, DNS:*.stage.denic.de, DNS:*.start-your-domain.de, DNS:*.svc.denic.de, DNS:*.test.denic.de, DNS:*.transit.denic.de, DNS:denic-services.com, DNS:denic-services.de, DNS:denic.de, DNS:denic.net, DNS:denic.online, DNS:digital-escrow.at, DNS:digital-escrow.ch, DNS:eine-gute-domain.de, DNS:einegutedomain.de, DNS:escrow-digital.at, DNS:escrow-digital.ch, DNS:escrow-digital.com, DNS:escrow-digital.de, DNS:escrow4ntld.com, DNS:escrow4ntlds.com, DNS:nic.de, DNS:start-your-domain.de
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/22.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Oct 1 08:23:32.481 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:50:1C:6D:AD:7C:70:29:07:58:71:94:D1: 0F:C5:0B:6E:CF:64:16:31:18:23:D6:73:32:66:44:9C: 30:1E:02:82:02:20:5F:B6:20:6D:BF:AB:5B:A3:B3:9E: 72:08:0D:3D:4F:03:70:12:97:DC:FE:D9:03:16:65:28: F2:6F:31:59:1A:8F 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 08:23:32.861 2026 GMT Extensions: 00:00:05:00:19:43:D5:A2 Signature : ecdsa-with-SHA256 30:46:02:21:00:B8:E7:11:C0:3E:EE:14:99:30:D8:D0: 0E:9B:BA:EC:B2:50:4C:D5:7B:C8:7D:BE:1A:C8:2F:0D: 04:AB:7A:93:39:02:21:00:D1:52:E0:B8:A8:EC:0B:1C: 76:E7:60:86:F7:0E:9C:CA:7F:60:89:B9:25:A0:15:05: FC:D1:83:D8:2B:92:95:1F
-----BEGIN CERTIFICATE-----
MIIMKTCCCxGgAwIBAgISBnnT47pNNEtGdAUKMHtaDAqVMA0GCSqGSIb3DQEBCwUA
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Iy90RF4uc9hYCQUptuJngoQmNE7Jc7T0NB/5IA4hQ6iHtA/a2a775baF01uV
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-06T00:58:08+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
666
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
2127
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

Registration / WHOIS →DNS records →