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

picabo.cz · 77.93.209.241:443

Verified

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

Subject
CN=picabo.cz
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-01T07:17:30+00:00
Expires
2026-12-30T07:17:29+00:00
Days remaining
86
Serial (hex)
05AFE99B20F4E42A997EC3558A6F04E05ABA
Signature
RSA-SHA256
Public key
RSA 3072

Subject alternative names (SAN)

DNS:picabo.cz, DNS:picabo.eu, DNS:picabo.info, DNS:picabo.sk, DNS:spravasite.cz, DNS:spravasite.info, DNS:www.picabo.cz, DNS:www.picabo.eu, DNS:www.picabo.info, DNS:www.picabo.sk, DNS:www.spravasite.cz, DNS:www.spravasite.info

SHA-256 fingerprint

E6:2A:0B:3A:98:97:72:F6:ED:8C:60:86:AA:8D:14:DD:49:AF:19:BF:DD:17:93:E5:6B:6E:FD:3A:6C:B7:6B:69
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
39:E6:54:12:21:66:48:73:FF:2E:AE:63:5E:DD:B2:DD:69:F0:AC:6B
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:picabo.cz, DNS:picabo.eu, DNS:picabo.info, DNS:picabo.sk, DNS:spravasite.cz, DNS:spravasite.info, DNS:www.picabo.cz, DNS:www.picabo.eu, DNS:www.picabo.info, DNS:www.picabo.sk, DNS:www.spravasite.cz, DNS:www.spravasite.info
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/59.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Oct 1 08:16:00.382 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:59:76:8B:4D:6B:4A:2C:47:0D:5F:CE:6D: A0:62:3C:19:EF:94:DB:29:19:51:AD:B0:D6:E5:DA:F9: AA:D7:8E:B6:02:21:00:B8:B8:4A:F5:BC:C6:A9:DB:A7: 19:69:8F:2D:26:C3:63:3C:30:09:34:BF:E9:7B:5E:47: A0:AA:EE:FD:82:5C:55 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 : Oct 1 08:16:01.612 2026 GMT Extensions: 00:00:05:00:47:16:92:CA Signature : ecdsa-with-SHA256 30:46:02:21:00:82:EE:84:23:FB:45:FD:A0:A7:B0:08: ED:1C:0C:FD:4F:97:FF:3A:D8:80:C9:9A:D4:91:2B:E5: A5:AD:05:A0:9C:02:21:00:BE:34:C2:D9:96:5A:6C:63: 19:48:B9:30:70:89:C7:D3:D7:1A:E8:0E:C6:AD:2E:85: C2:BE:99:19:1A:71:C6:13
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-04T18:40:56+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
699
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
2160
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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