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 · 2.16.6.220:443

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=YR2
Valid from
2026-11-03T18:48:25+00:00
Expires
2027-02-01T18:48:24+00:00
Days remaining
87
Serial (hex)
064E109A4DBC98263518EAAD23F18884DAB4
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: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

A2:D1:55:C2:8D:EA:EE:B2:13:BE:F3:CB:3D:1F:AD:63:FF:87:92:C9:3F:34:5C:26:C0:5D:DC:42:6C:D2:5A:7E
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
1A:F7:FD:16:B7:54:CD:D8:09:C9:F5:11:11:46:E9:A4:C4:82:F6:80
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: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: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://yr2.c.lencr.org/53.crl
ct_precert_scts
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 : Nov 3 19:46:55.444 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:C5:DB:0D:9B:8D:BC:40:BF:AC:06:E2: 84:B3:CE:E9:75:9B:D8:91:69:8A:3D:50:9D:15:49:BE: 73:AB:02:AE:94:02:21:00:A0:54:17:EA:BB:2F:08:8A: AC:2A:EE:A8:C8:4F:48:28:3C:08:59:72:6A:3D:EC:EC: 4B:E8:95:E4:CB:D7:D8:F3 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Nov 3 19:46:56.148 2026 GMT Extensions: 00:00:05:00:37:4D:92:41 Signature : ecdsa-with-SHA256 30:45:02:21:00:B1:2D:65:56:4A:59:1E:3E:9C:52:0E: 8B:0E:09:0E:36:E7:96:90:EA:3E:9F:B6:54:25:4C:C4: 22:51:2B:1E:4E:02:20:7F:D4:1F:17:2D:46:3D:9C:AD: 63:1E:2E:A0:AC:B2:B2:62:D0:11:44:5A:08:BA:B7:BB: F6:B1:30:13:02:54:50
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-06T06:58:11+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
666
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
2127
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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