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

itzbund.de · 80.245.152.140:443

Verified

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

Subject
C=DE ST=Nordrhein-Westfalen O=Informationstechnikzentrum Bund (ITZBund) CN=www.itzbund.de
Issuer
C=DE O=D-Trust GmbH CN=D-TRUST BR CA 2-23-1 2023
Valid from
2026-08-07T11:51:41+00:00
Expires
2027-02-21T11:51:39+00:00
Days remaining
144
Serial (hex)
713F67CD2D0B0ABA843D862BD224196B38F83D81
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

DNS:www.itzbund.de, DNS:itzbund.de

SHA-256 fingerprint

2E:EC:E3:CB:D9:A8:B1:87:AF:66:23:8E:04:13:70:53:82:E7:24:D8:F5:0F:29:7B:11:A3:92:CC:02:54:64:F3
Certificate extensions & PEM
authorityInfoAccess
CA Issuers - URI:http://www.d-trust.net/cgi-bin/D-TRUST_BR_CA_2-23-1_2023.crt
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.4788.2.202.2 CPS: https://www.d-trust.net/internet/files/D-TRUST_CSM_PKI_CPS.pdf
ct_precert_scts
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 7 11:51:44.485 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:BE:EE:E9:5C:2C:0D:92:9D:A8:52:BB: C3:62:08:73:20:3C:61:92:14:4E:0B:43:F3:8C:1A:30: 81:C8:39:B6:2C:02:20:4D:2F:34:CF:3E:F3:F7:B3:5D: 4D:AC:F7:5C:4D:94:C1:8B:E4:98:61:44:8F:4D:4A:12: E7:ED:76:E2:36:2D:98 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 7 11:51:44.455 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:FD:39:17:3F:F7:E8:AE:0F:B9:89:49: CC:C8:23:59:5B:46:2C:C1:B0:36:26:DF:C1:8B:71:B7: A1:5E:8A:43:E9:02:20:09:16:70:3D:1D:83:BD:5D:0C: E0:A4:28:AA:44:02:4A:08:45:E4:55:DA:E1:3E:9F:DB: FD:19:76:D4:9B:22:C8 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 7 11:51:44.802 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:9A:EB:EB:9E:36:5E:C3:97:75:FE:12: FC:C7:99:AA:8C:D4:9B:2D:D2:98:B6:B4:2E:16:65:FB: B8:C7:E8:7E:F7:02:20:54:4D:2B:7D:45:A8:D8:E2:00: 43:5D:2D:25:E0:17:A1:F9:5B:AD:F6:14:A9:A0:BC:35: 0D:B2:C6:35:D1:14:3F 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 : Aug 7 11:51:44.530 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:10:CA:1A:8A:87:EF:F5:0F:B6:8D:27:7E: AC:FD:32:0B:E1:6C:C6:CD:A1:B0:E9:99:48:1E:61:C1: 1B:D0:E1:04:02:21:00:E2:A6:F0:0E:AE:17:AE:76:36: D9:BD:E4:06:C9:54:43:28:64:CC:D7:9A:37:D8:B4:0E: F9:58:F6:24:AC:CB:F9 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Aug 7 11:51:44.779 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:46:27:C1:D2:06:58:D9:2B:F1:D2:DF:5B: 49:E5:A8:E7:F5:DA:55:6D:A0:D6:CB:92:33:BC:2A:CE: 79:62:B3:03:02:20:39:BF:59:B3:17:82:80:0B:95:51: F7:91:8C:6D:DE:60:B1:42:46:F7:9B:FB:3A:5D:7A:CF: 4C:2C:B9:24:47:F5 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 : Aug 7 11:51:44.968 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:86:31:26:B3:22:65:89:DA:B0:A2:5C: 97:13:27:D0:3C:BA:58:4E:32:55:2C:12:A3:5F:45:39: D4:5F:00:79:85:02:21:00:DE:79:53:7D:AA:6E:A6:08: 8C:3C:00:24:F1:2E:63:51:D8:22:33:EF:F5:87:FF:BD: 1B:CC:4C:8E:0D:21:15:BE Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 00:1A:5D:1A:1C:2D:93:75:B6:48:55:78:F8:2F:71:A1: AE:6E:EF:39:7D:29:7C:8A:E3:15:7B:CA:DE:E1:A0:1E Timestamp : Aug 7 11:51:45.694 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:01:9D:00:A2:66:34:35:33:A3:A4:37:93: 08:86:18:5F:4D:DF:B6:1B:A9:DD:6C:B0:B3:26:D5:EF: DE:BA:B8:74:02:20:7A:91:BD:99:16:EA:95:12:14:13: 4C:C6:58:69:2C:23:79:E9:9C:D9:0A:4C:6C:2B:90:04: 0C:0A:4C:85:B0:34
basicConstraints
CA:FALSE
crlDistributionPoints
Full Name: URI:http://crl.d-trust.net/crl/d-trust_br_ca_2-23-1_2023.crl URI:http://cdn.d-trust-cloudcrl.net/crl/d-trust_br_ca_2-23-1_2023.crl
extendedKeyUsage
TLS Web Server Authentication
subjectAltName
DNS:www.itzbund.de, DNS:itzbund.de
authorityKeyIdentifier
B3:FA:D0:F4:21:96:2C:1D:98:F7:90:95:7D:89:FB:5B:00:7B:05:B9
keyUsage
Digital Signature, Key Encipherment
subjectKeyIdentifier
71:20:41:AF:17:BB:8E:A0:7E:8C:AF:3D:6D:F0:A7:52:C4:FD:7E:C3
-----BEGIN CERTIFICATE-----
MIIKtzCCCJ+gAwIBAgIUcT9nzS0LCrqEPYYr0iQZazj4PYEwDQYJKoZIhvcNAQEN
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/8YO2FjOX99kpKM=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-30T11:35:40+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=DE O=D-Trust GmbH CN=D-TRUST BR CA 2-23-1 2023
Issuer
C=DE O=D-Trust GmbH CN=D-TRUST BR Root CA 2 2023
Valid from
2023-05-11T08:54:47+00:00
Expires
2038-05-09T08:56:30+00:00
Days remaining
4238
Serial (hex)
51F7D7A7C824EA3D11423B35FE712E6A
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

D9:04:A2:7F:D2:D2:71:DC:FE:40:A1:F4:71:03:3C:E4:8A:4B:5E:14:84:75:3D:A6:6F:71:66:D6:EB:DC:06:E6
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
authorityKeyIdentifier
67:90:F0:D6:DE:B5:18:D5:46:29:7E:5C:AB:F8:9E:08:BC:64:95:10
authorityInfoAccess
OCSP - URI:http://d-trust-br-root-ca-2-2023.ocsp.d-trust.net CA Issuers - URI:http://www.d-trust.net/cgi-bin/D-TRUST_BR_Root_CA_2_2023.crt
certificatePolicies
Policy: 2.23.140.1.2.2 Policy: 0.4.0.2042.1.7 Policy: 1.3.6.1.4.1.4788.2.202.2 CPS: http://www.d-trust.net/internet/files/D-TRUST_TSPS.pdf
crlDistributionPoints
Full Name: URI:http://crl.d-trust.net/crl/d-trust_br_root_ca_2_2023.crl
subjectKeyIdentifier
B3:FA:D0:F4:21:96:2C:1D:98:F7:90:95:7D:89:FB:5B:00:7B:05:B9
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE, pathlen:0
-----BEGIN CERTIFICATE-----
MIIG/jCCBOagAwIBAgIQUffXp8gk6j0RQjs1/nEuajANBgkqhkiG9w0BAQ0FADBI
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71rv8MIPYyfofaF1lJcN+ExMnZTquKOYuQtqrd8xNrWs0fXeN0LKbdWgUakHGluB
s6Aze3OIrUkF9LNNqKn0E6vxU9T+15rMtq5ZgviyYdvvjDvFQnQsxurdwduJFYJe
uUnm9KOUh5tbe8CwxSu+e1pwrQ2MxZcj8RxYlLuOSSbSHpRGFbAIbzc2KyyXfC6Q
VJ7ekD+zYEG7Hz6wqhsY2S4n
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=DE O=D-Trust GmbH CN=D-TRUST BR Root CA 2 2023
Issuer
C=DE O=D-Trust GmbH CN=D-TRUST Root Class 3 CA 2 2009
Valid from
2025-07-14T08:32:31+00:00
Expires
2029-11-05T08:35:58+00:00
Days remaining
1131
Serial (hex)
4ECA5BE7F13021E35CA39E99FB9E9BFE
Signature
RSA-SHA512
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

2D:20:8A:4C:C0:BE:42:16:94:7D:96:5D:3A:EF:B0:E3:78:97:D7:69:1D:DE:B0:17:E5:3E:5C:07:8B:CD:34:4C
Certificate extensions & PEM
extendedKeyUsage
TLS Web Server Authentication
authorityKeyIdentifier
FD:DA:14:C4:9F:30:DE:21:BD:1E:42:39:FC:AB:63:23:49:E0:F1:84
authorityInfoAccess
OCSP - URI:http://d-trust-root-class-3-ca-2-2009.ocsp.d-trust.net CA Issuers - URI:http://www.d-trust.net/cgi-bin/D-TRUST_Root_Class_3_CA_2_2009.crt
certificatePolicies
Policy: 2.23.140.1.2.1 Policy: 2.23.140.1.2.2 Policy: 2.23.140.1.1 Policy: 0.4.0.2042.1.6 Policy: 0.4.0.2042.1.7 Policy: 0.4.0.2042.1.4 Policy: 0.4.0.194112.1.4 Policy: 1.3.6.1.4.1.4788.2.202.3 CPS: https://www.d-trust.net/internet/files/D-TRUST_TSPS.pdf Policy: 1.3.6.1.4.1.4788.2.202.2 CPS: https://www.d-trust.net/internet/files/D-TRUST_TSPS.pdf Policy: 1.3.6.1.4.1.4788.2.202.1 CPS: https://www.d-trust.net/internet/files/D-TRUST_TSPS.pdf Policy: 1.3.6.1.4.1.4788.2.150.4 CPS: https://www.d-trust.net/internet/files/D-TRUST_TSPS.pdf
crlDistributionPoints
Full Name: URI:http://crl.d-trust.net/crl/d-trust_root_class_3_ca_2_2009.crl Full Name: URI:http://cdn.d-trust-cloudcrl.net/crl/d-trust_root_class_3_ca_2_2009.crl
subjectKeyIdentifier
67:90:F0:D6:DE:B5:18:D5:46:29:7E:5C:AB:F8:9E:08:BC:64:95:10
keyUsage
Certificate Sign, CRL Sign
basicConstraints
CA:TRUE
-----BEGIN CERTIFICATE-----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LMGpkJNGmGfLg2qgUCOnO/aBOeDt8Lm/ZfHYy3r773MDzgD0fdfgXTtmuNyOuoPL
h3YD/CXZ5yNvBv1n8+D/hLxHv7UWGEZpFMwF99vTSaxrzKvktQtDJF5La01n39a1
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bc4LQr7RunAcnCHlDzFpF9f8CrTe7YCcy5K0i/XeWaJYCaVjRwvhQTI0Qdmasdmo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bGVzL0QtVFJVU1RfVFNQUy5wZGYwVAYLKwYBBAGlNAKBSgEwRTBDBggrBgEFBQcC
ARY3aHR0cHM6Ly93d3cuZC10cnVzdC5uZXQvaW50ZXJuZXQvZmlsZXMvRC1UUlVT
VF9UU1BTLnBkZjBUBgsrBgEEAaU0AoEWBDBFMEMGCCsGAQUFBwIBFjdodHRwczov
L3d3dy5kLXRydXN0Lm5ldC9pbnRlcm5ldC9maWxlcy9ELVRSVVNUX1RTUFMucGRm
MIGeBgNVHR8EgZYwgZMwQ6BBoD+GPWh0dHA6Ly9jcmwuZC10cnVzdC5uZXQvY3Js
L2QtdHJ1c3Rfcm9vdF9jbGFzc18zX2NhXzJfMjAwOS5jcmwwTKBKoEiGRmh0dHA6
Ly9jZG4uZC10cnVzdC1jbG91ZGNybC5uZXQvY3JsL2QtdHJ1c3Rfcm9vdF9jbGFz
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MA4GA1UdDwEB/wQEAwIBBjAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBDQUA
A4IBAQAA7T4qgsS1wJ2uk1DMYIAbNoNIQWuorunbdMDNazSsJ9QXJdD5DCrtBc/9
Gn4ZjashHmCBSoaGXbh0561s3iUT6Pj8L0tsX23jVjxW9pqCwW4BvbTbvIQ6m1Oy
kVJJS+ouXJNPzyJmT3tMesL87BEf6KF1LaU52Tfc/wOhs7hjNzKbp12lIhOo4rtV
Y/uOJJxfOq3CsQS+RghcO4nCHpcIMqWQUioYRCN/7gxy/PpzPR2v6O8t7nKHh2jk
6FIhKx9pny3vPCdDQNBtILSdvyCrDhExgD/vPINRx4LhmRZdYAkICGAHdN83fROd
o14BVlgrZAvmi0867Miw2PJZwvsq
-----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 →