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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

netsurf.net · 172.104.251.198:443

Unverified
Certificate verification failed. These are unverified certificate details presented by the server. SSL operation failed with code 1. OpenSSL Error messages: error:0A000086:SSL routines::certificate verify failed

Certificate verification failed

Subject
CN=netsurf.net
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-08-19T18:42:09+00:00
Expires
2026-11-17T18:42:08+00:00
Days remaining
41
Serial (hex)
060F35081BE816F26D5169670FFF0C602331
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.netsurf.net, DNS:netsurf.net

SHA-256 fingerprint

B5:1E:8E:93:78:BF:B6:B8:C8:9F:08:0A:74:D1:C3:D3:C4:D5:0E:E7:CC:92:36:9A:09:DA:E2:CF:41:C9:1B:EA
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
18:00:60:0E:E8:05:EB:E4:F1:7D:12:CB:0A:C4:E4:A4:6B:8C:E7:8C
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:*.netsurf.net, DNS:netsurf.net
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/50.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Aug 19 19:40:40.364 2026 GMT Extensions: 00:00:05:00:36:42:8B:A3 Signature : ecdsa-with-SHA256 30:44:02:20:3E:65:9D:9E:2E:99:16:7F:55:AC:40:76: 05:75:DF:63:B7:C5:7B:CE:E2:8A:17:BC:01:DA:FC:C2: 52:F5:F3:6B:02:20:10:D4:85:FC:F5:3D:40:01:18:72: 00:6F:21:52:2A:2A:34:8B:0F:0B:55:D8:F4:C0:42:60: A8:85:4F:A2:19:F7 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 19 19:40:40.661 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:BB:3F:9A:D1:73:5B:5F:03:70:F8:65: 99:DA:ED:F0:45:9E:FD:A3:3D:96:D1:FD:FF:CD:E8:13: 5D:C1:24:0D:4C:02:21:00:C9:2E:9C:5A:EA:1D:01:D6: 7E:2C:3F:48:C4:0E:AD:C9:F2:2E:FE:09:D6:FC:81:56: C4:AD:A5:E8:B2:85:3A:89
-----BEGIN CERTIFICATE-----
MIIE/zCCA+egAwIBAgISBg81CBvoFvJtUWlnD/8MYCMxMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNZUjIwHhcNMjYwODE5MTg0MjA5WhcNMjYxMTE3MTg0MjA4WjAWMRQwEgYDVQQD
EwtuZXRzdXJmLm5ldDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBANte
FOSaIwRjHBN0cYpxJ1NaEozu+kQAFFoJu3QgSrxKVsjgYwLIu+XlU80gRezcwFKN
DkuybHdUOcLydXawfxR5zfgjJej/TEbbjX0llyKJPnXlzIsUek6vMinMA/wMr2mf
vMNaXk2KgRAuZlTcQCKY05ZL+MlCXSB4rzn8U8llzJyv8bifMFeDTd5cp4DbMWSK
RtXRu3KFVQmWrpA/6Of3F6SfVBqe4iZaOJnmPRvm6eBoqjKOi8kjh77I5uKKwPtk
ZGjd9UsiAzv+7TsuyFrmZ+kPFAZffAZbVq2Qd9KHnGHaXnxWKYkOXLh0sEL4cCZX
CygaSoWuUadwpCtcI4MCAwEAAaOCAigwggIkMA4GA1UdDwEB/wQEAwIFoDATBgNV
HSUEDDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQYAGAO6AXr
5PF9EssKxOSka4znjDAfBgNVHSMEGDAWgBRAFS0mee0yIJ7fmnId1jIfgQyBDDAz
BggrBgEFBQcBAQQnMCUwIwYIKwYBBQUHMAKGF2h0dHA6Ly95cjIuaS5sZW5jci5v
cmcvMCUGA1UdEQQeMByCDSoubmV0c3VyZi5uZXSCC25ldHN1cmYubmV0MBMGA1Ud
IAQMMAowCAYGZ4EMAQIBMC4GA1UdHwQnMCUwI6AhoB+GHWh0dHA6Ly95cjIuYy5s
ZW5jci5vcmcvNTAuY3JsMIIBDAYKKwYBBAHWeQIEAgSB/QSB+gD4AH0AGoudaw/+
v4G0eTnG0jEKhtbRAtTwRuIYLJ3jX14mJe8AAAGgG4pALAAIAAAFADZCi6MEAwBG
MEQCID5lnZ4umRZ/VaxAdgV132O3xXvO4ooXvAHa/MJS9fNrAiAQ1IX89T1AARhy
AG8hUioqNIsPC1XY9MBCYKiFT6IZ9wB3AK9niDtXsE7dj6bZfvYuqOuBCsdxYPAk
XlXWDC/nhYc6AAABoBuKQVUAAAQDAEgwRgIhALs/mtFzW18DcPhlmdrt8EWe/aM9
ltH9/83oE13BJA1MAiEAyS6cWuodAdZ+LD9IxA6tyfIu/gnW/IFWxK2l6LKFOokw
DQYJKoZIhvcNAQELBQADggEBABjnnB+4l1WpvYLTh+xX0TMVB4sC4Ludn5WNu2/+
pAThaQC+LWo6k8ahy3shBGyJu1fLFYQ8xweSxlx/otbVF/a18Y20qiW3aF5EBv5+
ir04SaKT3gpfLZeLRRy+4K/LZ/duzs/zcxOhTVNCQNkUtifwV5/VZ2t6mbIeN8DL
L5TUlk50djuX+o4Er22DtwUF6zZYCVlFkhSF3RpGUMxDBNfsojrvNP26Nioym556
ce+la8FM1t74T9GMDEO3EyYVVufP8wfX2pDyPhNf2MVwNpdfMr4/lSZBrUCAnUiI
7TzZsl+BqMpMJHlU+bKGzk6Amk85IBkNg8lYHnD7oobUMSw=
-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-10-06T23:52:33+00:00

Server-presented chain · 1 additional certificate

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
697
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-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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