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

rozhled.net · 5.180.200.7:443

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
The certificate has expired.

Certificate verification failed

Subject
CN=demo.realgeek.cz
Issuer
C=US O=Let's Encrypt CN=R12
Valid from
2025-10-07T11:13:31+00:00
Expires
2026-01-05T11:13:30+00:00
Days remaining
-304
Serial (hex)
0547A905C0B07E0A16C3D1C3BF2246303DB0
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:chimpanzo.com, DNS:demo.realgeek.cz, DNS:dev.omenhadry.cz, DNS:dobromerch.cz, DNS:dodomerch.cz, DNS:eshop.klub-sousedu.cz, DNS:houseshop.cz, DNS:jehlashop.cz, DNS:merch-factory.cz, DNS:mgshop.cz, DNS:moonmerch.cz, DNS:nycdiaries.cz, DNS:omenhadry.cz, DNS:pecawashere.cz, DNS:pedruvshop.cz, DNS:portymusic.cz, DNS:realgeek.cz, DNS:realgeek.rozhled.net, DNS:realgeek.sk, DNS:sakoshop.cz, DNS:shop.esuba.eu, DNS:store.insidegames.cz, DNS:www.chimpanzo.com, DNS:www.dobromerch.cz, DNS:www.dodomerch.cz, DNS:www.eshop.klub-sousedu.cz, DNS:www.houseshop.cz, DNS:www.jehlashop.cz, DNS:www.merch-factory.cz, DNS:www.mgshop.cz, DNS:www.moonmerch.cz, DNS:www.nycdiaries.cz, DNS:www.omenhadry.cz, DNS:www.pecawashere.cz, DNS:www.pedruvshop.cz, DNS:www.portymusic.cz, DNS:www.realgeek.cz, DNS:www.realgeek.sk, DNS:www.sakoshop.cz, DNS:www.yunglab.cz, DNS:yunglab.cz

SHA-256 fingerprint

85:E0:B7:80:23:CB:B1:AE:3F:66:85:AC:79:08:32:FA:7F:8A:20:83:8F:FC:CA:1A:0D:FE:81:D5:8B:4F:DF:AC
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
04:25:8A:8C:3A:D5:F0:5B:DA:F6:26:E2:1A:57:E4:FE:15:66:9D:E7
authorityKeyIdentifier
00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
authorityInfoAccess
CA Issuers - URI:http://r12.i.lencr.org/
subjectAltName
DNS:chimpanzo.com, DNS:demo.realgeek.cz, DNS:dev.omenhadry.cz, DNS:dobromerch.cz, DNS:dodomerch.cz, DNS:eshop.klub-sousedu.cz, DNS:houseshop.cz, DNS:jehlashop.cz, DNS:merch-factory.cz, DNS:mgshop.cz, DNS:moonmerch.cz, DNS:nycdiaries.cz, DNS:omenhadry.cz, DNS:pecawashere.cz, DNS:pedruvshop.cz, DNS:portymusic.cz, DNS:realgeek.cz, DNS:realgeek.rozhled.net, DNS:realgeek.sk, DNS:sakoshop.cz, DNS:shop.esuba.eu, DNS:store.insidegames.cz, DNS:www.chimpanzo.com, DNS:www.dobromerch.cz, DNS:www.dodomerch.cz, DNS:www.eshop.klub-sousedu.cz, DNS:www.houseshop.cz, DNS:www.jehlashop.cz, DNS:www.merch-factory.cz, DNS:www.mgshop.cz, DNS:www.moonmerch.cz, DNS:www.nycdiaries.cz, DNS:www.omenhadry.cz, DNS:www.pecawashere.cz, DNS:www.pedruvshop.cz, DNS:www.portymusic.cz, DNS:www.realgeek.cz, DNS:www.realgeek.sk, DNS:www.sakoshop.cz, DNS:www.yunglab.cz, DNS:yunglab.cz
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://r12.c.lencr.org/49.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A4:42:C5:06:49:60:61:54:8F:0F:D4:EA:9C:FB:7A:2D: 26:45:4D:87:A9:7F:2F:DF:45:59:F6:27:4F:3A:84:54 Timestamp : Oct 7 12:12:01.941 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:22:71:12:51:59:9F:0B:F5:08:07:C0:41: 7C:10:D4:0D:19:AB:00:46:6B:66:50:78:48:53:E9:57: E7:C6:09:3D:02:20:71:DA:A8:05:A8:40:90:44:C8:87: 0E:7B:8F:B1:FD:F1:DA:A2:DD:CE:78:4B:8A:37:F9:B3: 83:F5:EB:16:01:C8 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 96:97:64:BF:55:58:97:AD:F7:43:87:68:37:08:42:77: E9:F0:3A:D5:F6:A4:F3:36:6E:46:A4:3F:0F:CA:A9:C6 Timestamp : Oct 7 12:12:02.001 2025 GMT Extensions: none Signature : ecdsa-with-SHA256 30:43:02:1F:68:9F:FE:90:76:57:0A:D6:F0:63:7D:DD: D4:46:7F:24:EF:E7:65:F2:62:E8:C7:B6:7F:B3:82:A5: 81:35:B3:02:20:3C:FE:45:7C:01:C5:90:3C:28:3B:43: E0:49:C7:56:22:FD:44:14:1B:72:F2:89:9B:7C:E6:46: 0D:6C:5E:00:79
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-04T20:10:13+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=R12
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2024-03-13T00:00:00+00:00
Expires
2027-03-12T23:59:59+00:00
Days remaining
128
Serial (hex)
C212324B70A9B49171DC40F7E285263C
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:1F:CE:77:84:01:68:99:A5:A0:02:03:A9:EF:C8:0F:18:EB:BD:75:58:07:17:ED:C1:55:35:80:93:08:36:EC
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Client Authentication, TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
00:B5:29:F2:2D:8E:6F:31:E8:9B:4C:AD:78:3E:FA:DC:E9:0C:D1:D2
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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