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

sophos.com · 2.16.6.207:443

Verified

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

Subject
CN=www.sophos.com
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-19T06:54:53+00:00
Expires
2026-11-17T06:54:52+00:00
Days remaining
49
Serial (hex)
06DB2C875AED642CAE4B23896910B18DABEA
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:assets.sophos.com, DNS:club.sophos.com, DNS:demo.sophos.com, DNS:dev-login.sophos.com, DNS:dev.preview.sophos.com, DNS:discover.sophos.com, DNS:home.sophos.com, DNS:investors.sophos.com, DNS:login.sophos.com, DNS:my.astaro.com, DNS:myutm.sophos.com, DNS:news.sophos.com, DNS:partnernews.sophos.com, DNS:partnerportal.sophos.com, DNS:partners.sophos.com, DNS:qa.preview.sophos.com, DNS:secure2.sophos.com, DNS:sophos.com, DNS:sophserv.sophos.com, DNS:stage.preview.sophos.com, DNS:test-login.sophos.com, DNS:www.hitmanpro.com, DNS:www.secureworks.com, DNS:www.secureworks.jp, DNS:www.sophos.com, DNS:www.surfright.com, DNS:www.surfright.nl

SHA-256 fingerprint

CB:B5:0F:4E:F7:24:C9:19:77:C9:E0:AE:2E:3C:B0:9F:51:55:5A:C3:5E:F7:FC:52:83:03:6C:8B:4C:7E:04:8B
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
96:C0:E3:CA:72:C1:6B:2C:BB:04:97:7C:74:B8:8B:A8:DE:F9:9F:C6
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:assets.sophos.com, DNS:club.sophos.com, DNS:demo.sophos.com, DNS:dev-login.sophos.com, DNS:dev.preview.sophos.com, DNS:discover.sophos.com, DNS:home.sophos.com, DNS:investors.sophos.com, DNS:login.sophos.com, DNS:my.astaro.com, DNS:myutm.sophos.com, DNS:news.sophos.com, DNS:partnernews.sophos.com, DNS:partnerportal.sophos.com, DNS:partners.sophos.com, DNS:qa.preview.sophos.com, DNS:secure2.sophos.com, DNS:sophos.com, DNS:sophserv.sophos.com, DNS:stage.preview.sophos.com, DNS:test-login.sophos.com, DNS:www.hitmanpro.com, DNS:www.secureworks.com, DNS:www.secureworks.jp, DNS:www.sophos.com, DNS:www.surfright.com, DNS:www.surfright.nl
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/107.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C8:A3:C4:7F:C7:B3:AD:B9:35:6B:01:3F:6A:7A:12:6D: E3:3A:4E:43:A5:C6:46:F9:97:AD:39:75:99:1D:CF:9A Timestamp : Aug 19 07:53:23.147 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:EB:E9:0B:66:3C:05:65:90:31:86:38: 9D:F6:10:19:80:F4:2F:BC:65:AF:ED:45:DD:C9:C1:23: 2D:31:A2:9C:0B:02:21:00:EB:7B:29:CC:05:47:FE:6B: C8:90:59:30:85:94:48:4E:77:B7:D1:34:43:A5:4F:D3: C4:9F:22:18:55:D7:74:65 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 46:AF:86:3D:3B:3E:E5:9F:A5:77:DE:A8:24:5D:36:B0: D9:ED:22:A2:23:F4:61:77:41:22:94:52:EE:95:50:5F Timestamp : Aug 19 07:53:23.152 2026 GMT Extensions: 00:00:05:00:15:C0:61:F0 Signature : ecdsa-with-SHA256 30:45:02:21:00:B2:B4:92:DD:4C:9F:C7:D0:05:E9:16: 8C:8B:94:ED:6D:DB:02:BF:A9:CA:47:82:A4:89:00:FB: 40:14:B1:D7:19:02:20:2D:E2:77:3C:55:A1:E1:25:D1: C6:56:84:75:58:44:6F:88:87:64:15:F8:5F:6A:48:90: 66:28:06:74:CE:F3:7F
-----BEGIN CERTIFICATE-----
MIIHBjCCBe6gAwIBAgISBtssh1rtZCyuSyOJaRCxjavqMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNZUjEwHhcNMjYwODE5MDY1NDUzWhcNMjYxMTE3MDY1NDUyWjAZMRcwFQYDVQQD
Ew53d3cuc29waG9zLmNvbTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
AMdekfPMeS9UFjKQp9/wgTRvw2475fMqqnuiY2OEoY9Rnl+S9l4PbHY7o2slc7ru
FeOjMv2M+H0jNDl8YiyY8jwoSMqSrMnbow25x54ZVVeIgtbVUcWE7z8YZ7lfVORg
J6K+c4JM8Po/Yhzu8IUSTA7fowvngssBGME8VdKdIx28D8FyvdQ/e/RO8TW9WKdx
whjlLUmTmbQCNhfqlGSpB2Qd2y9sMa/MJEIYrbfHhB1TYkf08/uaiW6tZUZFxuZc
AnWVdtCZwuOgr1rnsg47V7hW9pDwOQE2nLpb73YXDL6CKrlW9FUby4Ica+6IDYF9
dI+VCz5b6WDh4zJxtSsjx9cCAwEAAaOCBCwwggQoMA4GA1UdDwEB/wQEAwIFoDAT
BgNVHSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSWwOPK
csFrLLsEl3x0uIuo3vmfxjAfBgNVHSMEGDAWgBQfLzW+RhSCzUCxrnksVXj699Ro
+zAzBggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKGF2h0dHA6Ly95cjEuaS5sZW5j
ci5vcmcvMIICJQYDVR0RBIICHDCCAhiCEWFzc2V0cy5zb3Bob3MuY29tgg9jbHVi
LnNvcGhvcy5jb22CD2RlbW8uc29waG9zLmNvbYIUZGV2LWxvZ2luLnNvcGhvcy5j
b22CFmRldi5wcmV2aWV3LnNvcGhvcy5jb22CE2Rpc2NvdmVyLnNvcGhvcy5jb22C
D2hvbWUuc29waG9zLmNvbYIUaW52ZXN0b3JzLnNvcGhvcy5jb22CEGxvZ2luLnNv
cGhvcy5jb22CDW15LmFzdGFyby5jb22CEG15dXRtLnNvcGhvcy5jb22CD25ld3Mu
c29waG9zLmNvbYIWcGFydG5lcm5ld3Muc29waG9zLmNvbYIYcGFydG5lcnBvcnRh
bC5zb3Bob3MuY29tghNwYXJ0bmVycy5zb3Bob3MuY29tghVxYS5wcmV2aWV3LnNv
cGhvcy5jb22CEnNlY3VyZTIuc29waG9zLmNvbYIKc29waG9zLmNvbYITc29waHNl
cnYuc29waG9zLmNvbYIYc3RhZ2UucHJldmlldy5zb3Bob3MuY29tghV0ZXN0LWxv
Z2luLnNvcGhvcy5jb22CEXd3dy5oaXRtYW5wcm8uY29tghN3d3cuc2VjdXJld29y
a3MuY29tghJ3d3cuc2VjdXJld29ya3MuanCCDnd3dy5zb3Bob3MuY29tghF3d3cu
c3VyZnJpZ2h0LmNvbYIQd3d3LnN1cmZyaWdodC5ubDATBgNVHSAEDDAKMAgGBmeB
DAECATAvBgNVHR8EKDAmMCSgIqAghh5odHRwOi8veXIxLmMubGVuY3Iub3JnLzEw
Ny5jcmwwggENBgorBgEEAdZ5AgQCBIH+BIH7APkAdwDIo8R/x7OtuTVrAT9qehJt
4zpOQ6XGRvmXrTl1mR3PmgAAAaAZArXLAAAEAwBIMEYCIQDr6QtmPAVlkDGGOJ32
EBmA9C+8Za/tRd3JwSMtMaKcCwIhAOt7KcwFR/5ryJBZMIWUSE53t9E0Q6VP08Sf
IhhV13RlAH4ARq+GPTs+5Z+ld96oJF02sNntIqIj9GF3QSKUUu6VUF8AAAGgGQK1
0AAIAAAFABXAYfAEAwBHMEUCIQCytJLdTJ/H0AXpFoyLlO1t2wK/qcpHgqSJAPtA
FLHXGQIgLeJ3PFWh4SXRxlaEdVhEb4iHZBX4X2pIkGYoBnTO838wDQYJKoZIhvcN
AQELBQADggEBAHIEbfzBCxf86zwCsDM4BW1g807G8eRvTAAVTdV1w+5Ryda9GIgV
U+iPssA6oqwmaqrBnQBzaXzd2E6Ks5luwxFeUy2IIYcv4XPvNCBgWsPXXujcgo78
6MCaH7J1gJNh32G3buNBw7KF2cWWn3S8nxlOdJBS+08tRhAaizdGYdtBykZiGdTu
VYl1pn4kLXTN8s5ARCdidX+4GRmhG+Zg6XzfyL4B7srCGMi0tL8suHbJz66B7E94
dm3GWLNmf31MczWK9aegDDu9HAWCESCDNYo/RuTG2izrJQM3Lznso6oeDWY7X0tT
8R72yGJb4aHnFY6znUEj14qZQyj5UDlM1xs=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-09-29T04:01:40+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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