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

workspace.cbws.nl · 185.142.141.173:443

Verified

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

Subject
CN=workspace.cbws.nl
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-13T15:00:57+00:00
Expires
2026-11-11T15:00:56+00:00
Days remaining
43
Serial (hex)
05E5E539451689A4D8150205F517876C1D5F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.cbws.nl, DNS:autodiscover.cbws.nl, DNS:workspace.cbws.nl

SHA-256 fingerprint

4A:94:34:7E:62:66:27:94:CC:15:CE:A2:9E:33:21:99:AA:C5:96:23:7D:C5:B6:A4:D0:41:A0:70:1C:6A:C5:58
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
CF:A6:26:24:4C:33:7B:1F:F0:6C:41:1E:D2:D3:B2:B3:80:BD:26:F3
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:autoconfig.cbws.nl, DNS:autodiscover.cbws.nl, DNS:workspace.cbws.nl
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/96.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : AF:67:88:3B:57:B0:4E:DD:8F:A6:D9:7E:F6:2E:A8:EB: 81:0A:C7:71:60:F0:24:5E:55:D6:0C:2F:E7:85:87:3A Timestamp : Aug 13 15:59:27.833 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:5D:4F:94:70:C2:A1:30:F4:6E:F4:89:73: C6:16:CE:9B:0B:5A:A1:60:D3:CB:9C:9F:38:07:47:AD: 49:6D:09:1D:02:21:00:E7:3B:12:AC:21:BC:AE:FC:A0: B4:43:A6:B7:00:20:5B:D5:55:59:18:24:02:29:3E:D7: 5C:D6:9F:DD:FE:2A:A4 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 : Aug 13 15:59:26.258 2026 GMT Extensions: 00:00:05:00:34:58:DA:F6 Signature : ecdsa-with-SHA256 30:45:02:20:7E:57:C6:68:E7:C5:04:9F:8B:08:24:61: 47:7D:35:D8:3C:92:76:F6:EF:DD:8E:C0:B3:B4:C4:4B: AF:A7:3D:FB:02:21:00:8D:8D:5D:CA:25:64:2E:B8:3A: 5A:A4:0A:DF:0B:FA:D2:B9:EC:8D:24:5E:99:7E:7D:27: 70:9E:3F:9C:77:45:5B
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T04:24:42+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
704
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
2165
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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