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

dsmgroup.co.uk · 94.126.239.72:443

Verified

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

Subject
CN=dsmgroup.co.uk
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-10-29T07:07:40+00:00
Expires
2027-01-27T07:07:39+00:00
Days remaining
83
Serial (hex)
06AE89821ACBAEFD3E1E350A124D578866FD
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:dsmgroup.co.uk, DNS:www.dsmgroup.co.uk

SHA-256 fingerprint

42:00:FA:F2:A5:8D:47:EE:88:32:25:BA:F8:27:70:5A:DB:F2:DD:9D:2A:04:37:BE:F1:B6:40:52:17:59:C4:45
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
21:91:7E:DB:73:1E:93:C6:5F:10:A3:B4:D4:67:DB:11:4D:82:D0:A3
authorityKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
authorityInfoAccess
CA Issuers - URI:http://yr2.i.lencr.org/
subjectAltName
DNS:dsmgroup.co.uk, DNS:www.dsmgroup.co.uk
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/126.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 59:6E:6C:33:86:94:B2:59:72:A2:56:C8:A0:E8:DD:90: 4A:76:E8:08:3D:DA:87:3B:01:08:38:28:14:3C:EE:59 Timestamp : Oct 29 08:06:10.496 2026 GMT Extensions: 00:00:05:00:17:63:96:AE Signature : ecdsa-with-SHA256 30:46:02:21:00:E5:5B:79:FD:02:E5:71:55:B8:06:09: BA:B3:B4:AD:B6:05:57:EF:9E:3D:AD:CD:3C:E0:6B:F4: FA:77:FB:09:18:02:21:00:DA:4B:AF:F0:51:F9:0F:AD: 62:F1:E4:A2:C6:9B:51:08:F9:41:44:B8:AF:44:CB:84: A2:3F:AC:02:1F:61:74:3D 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 : Oct 29 08:06:10.444 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F3:4C:9C:D6:F9:0D:50:9C:99:80:66: C0:66:92:18:78:8A:C9:FA:63:C5:29:0D:E0:07:62:2E: E0:D6:19:8F:CE:02:20:34:46:90:55:7E:22:6E:F7:F8: DD:AA:7C:A2:04:58:FF:F0:24:A7:6C:AF:DB:70:34:9E: 2C:85:33:DF:20:5A:D4
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-11-04T10:29:55+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR2
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
668
Serial (hex)
4EBD24947E24D394802D84A52FD5B319
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

23:8B:85:A0:09:9C:65:B9:70:47:7D:57:24:F1:A1:D4:75:CE:50:58:CF:FE:4E:FA:87:33:89:9B:DB:86:3C:47
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
40:15:2D:26:79:ED:32:20:9E:DF:9A:72:1D:D6:32:1F:81:0C:81:0C
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
2129
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 →