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

bartanet.cz · 192.162.96.10:443

Verified

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

Subject
CN=bartanet.cz
Issuer
C=US O=Let's Encrypt CN=YR2
Valid from
2026-09-06T00:09:08+00:00
Expires
2026-12-05T00:09:07+00:00
Days remaining
50
Serial (hex)
0518F3C12EACAC78DC8BA3A8F8A620A0D263
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:bartanet.cz, DNS:bartanet.eu, DNS:www.bartanet.cz, DNS:www.bartanet.eu

SHA-256 fingerprint

22:C8:8E:0B:4D:08:42:2E:BE:CE:88:40:69:AA:38:DF:BD:5E:7C:CB:77:FE:1E:3A:EC:8C:51:68:03:66:8F:04
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
0E:AF:CC:0B:F3:5C:C4:44:1A:36:1F:A2:68:E9:D7:2F:C8:ED:86:F2
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:bartanet.cz, DNS:bartanet.eu, DNS:www.bartanet.cz, DNS:www.bartanet.eu
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr2.c.lencr.org/100.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D7:6D:7D:10:D1:A7:F5:77:C2:C7:E9:5F:D7:00:BF:F9: 82:C9:33:5A:65:E1:D0:B3:01:73:17:C0:C8:C5:69:77 Timestamp : Sep 6 01:07:38.903 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A2:0A:B7:71:F9:88:02:8D:89:5F:79: 5C:10:1E:65:5B:00:98:F3:52:2B:D6:2A:42:1A:5C:48: 75:B0:2B:54:01:02:21:00:BF:EC:3B:71:D3:98:33:2D: 99:DC:78:48:64:2E:94:D5:99:1F:E0:B9:4C:48:D1:92: 53:4B:B8:7B:94:82:EE:10 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 : Sep 6 01:07:36.924 2026 GMT Extensions: 00:00:05:00:3D:92:D6:30 Signature : ecdsa-with-SHA256 30:44:02:20:0F:85:A2:D0:9C:C7:0A:22:C6:8E:BC:45: EB:08:00:1D:D2:2F:E2:E7:29:C8:8B:F4:B7:6F:0F:AA: 01:96:97:7C:02:20:43:BE:3E:2E:27:5A:C7:E7:0C:94: F7:5D:BB:8D:68:9B:9E:CD:D5:19:1B:A9:C6:D7:9F:E8: 48:21:E2:D0:E0:79
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-15T07:50:03+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
688
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
2149
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 →