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

dokom21.de · 85.22.54.70:443

Verified

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

Subject
CN=*.dokom21.de
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-22T04:38:45+00:00
Expires
2026-12-21T04:38:44+00:00
Days remaining
86
Serial (hex)
05DF461C6C63E8573F87ABA8D6283263FEDA
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:*.dokom.biz, DNS:*.dokom.de, DNS:*.dokom.eu, DNS:*.dokom.net, DNS:*.dokom.org, DNS:*.dokom21.biz, DNS:*.dokom21.de, DNS:*.dokom21.eu, DNS:*.dokom21.net, DNS:*.dokom21.org, DNS:dokom.biz, DNS:dokom.de, DNS:dokom.eu, DNS:dokom.net, DNS:dokom.org, DNS:dokom21.biz, DNS:dokom21.de, DNS:dokom21.eu, DNS:dokom21.net, DNS:dokom21.org

SHA-256 fingerprint

C0:FC:B6:37:B7:B4:BD:DF:21:BD:EE:BE:79:0F:02:8B:FD:93:BD:80:E6:70:AB:CE:4B:74:F1:51:54:6F:D5:E8
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
50:C4:9D:B5:05:67:EE:0F:95:CD:D7:3E:F9:BD:41:04:90:AC:C7:F4
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:*.dokom.biz, DNS:*.dokom.de, DNS:*.dokom.eu, DNS:*.dokom.net, DNS:*.dokom.org, DNS:*.dokom21.biz, DNS:*.dokom21.de, DNS:*.dokom21.eu, DNS:*.dokom21.net, DNS:*.dokom21.org, DNS:dokom.biz, DNS:dokom.de, DNS:dokom.eu, DNS:dokom.net, DNS:dokom.org, DNS:dokom21.biz, DNS:dokom21.de, DNS:dokom21.eu, DNS:dokom21.net, DNS:dokom21.org
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/91.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 : Sep 22 05:37:15.995 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:23:A1:D4:6A:61:B1:AE:4A:34:48:8F:B3: 4D:26:29:A0:22:D6:49:47:91:7E:1A:3B:7F:05:D3:BE: 8D:32:CA:5E:02:20:09:3E:F1:5F:ED:54:60:A7:FB:79: 8F:9A:45:03:A1:75:01:23:3C:9B:C0:35:78:26:55:97: 9A:E5:30:9F:3D:4C Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 26:E3:64:6E:58:69:21:23:BC:34:3F:47:24:35:9B:37: 92:CD:24:5A:88:D8:15:D3:93:33:FD:99:18:AB:47:23 Timestamp : Sep 22 05:37:13.573 2026 GMT Extensions: 00:00:05:00:44:F7:5F:7C Signature : ecdsa-with-SHA256 30:45:02:21:00:BD:BF:47:F8:D9:F0:2C:F3:BC:0B:4C: CE:6A:9A:DA:E9:E7:AE:82:31:85:94:0F:72:04:C5:31: CD:47:A7:F2:BC:02:20:11:35:EB:12:18:B0:12:59:09: 2B:7B:29:97:71:1B:DE:E4:BC:12:A9:7D:D8:34:88:6E: 28:E0:BD:F6:9F:C1:76
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-25T23:44:51+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
708
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-----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=
-----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
2169
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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