www.kulina.cz

Issued by R3

About this certificate

This digital certificate with serial number 03:28:49:e0:28:b3:e3:b5:2e:45:50:cd:a5:af:02:fc:4a:6e was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. If we have found any compliance issues with this certificate they will be shown below. I hope this certificate review is providing you the detailed information in a simple form you where looking for.


We have idenified some issues with this certificate:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=www.kulina.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 03:28:49:e0:28:b3:e3:b5:2e:45:50:cd:a5:af:02:fc:4a:6e
Serial Number (int): 275046350015855586505947886562216477739630
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: aa:e4:d1:43:c4:7e:73:5d:3c:3d:46:ce:a0:7a:ee:5b:aa:83:60:21
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 14:f6:c7:04:a8:ef:5f:15:0a:d1:75:dc:5e:74:5c:e8:24:66:e0:bf
Fingerprint (sha256): 26:68:8e:d6:d1:3e:f7:1b:38:7c:b9:02:2b:40:19:eb:e0:3a:bb:09:26:f3:5a:0b:8f:bf:a3:30:39:70:3c:17

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate www.kulina.cz

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.kulina.cz

Public Key Algorithm

ECDSA

Key Size

256

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature

Extended Key Usages

Server Authentication
Client Authentication

Extensions

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

kulina.cz
www.kulina.cz

Other certificates including the domain name kulina.cz

(limited to 100 certificates)
www.kulina.cz
dc.kulina.cz
www.permet.cz
sklad.kulina.cz
img.kulina.cz
www.kulina.cz
kulina.cz
www.kulina.cz
www.kulina.cz
www.permet.cz
dc.kulina.cz
www.permet.cz
vanoce.kulina.cz
www.permet.cz
www.permet.cz
www.permet.cz
www.permet.cz
www.permet.cz
kulina.cz
www.permet.cz
kulina.cz
kulina.cz
www.permet.cz
www.kulina.cz
www.kulina.cz
www.permet.cz
www.kulina.cz
www.permet.cz
www.kulina.cz
www.permet.cz
www.kulina.cz
www.kulina.cz
www.kulina.cz
www.kulina.cz
kulina.cz
vanoce.kulina.cz
www.permet.cz
kulina.cz
www.permet.cz
www.permet.cz
www.permet.cz
kulina.cz
kulina.cz
www.permet.cz
www.permet.cz
www.permet.cz
sklad.kulina.cz
kulina.cz
www.permet.cz
kulina.cz
www.kulina.cz
www.kulina.cz

Certificate

The complete raw certificate details for www.kulina.cz in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEEN2gz8F79sdpYKGvkZ96Pxn32N3W
RQBNa367TfBj4wsFPcEe2XBmwEYPFsl7IS13oiIW4MYbldK5cl+vtCXjcQ==
-----END PUBLIC KEY-----

ASN.1 decoded

 [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . [c:0|t:2|false] INTEGER 2
 . . . . . . . . [c:0|t:2|false] INTEGER 275046350015855586505947886562216477739630
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.6 (countryName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'US'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.10 (organizationName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Let's Encrypt'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-22 10:37:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-05-22 10:37:03 +0000 UTC
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.3 (commonName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.kulina.cz'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey)
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1)
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				000410dda0cfc17bf6c76960a1af919f7a3f19f7d8ddd645004d6b7ebb4df063e30b053dc11ed97066c0460f16c97b212d77a22216e0c61b95d2b9725fafb425e371
 . . . . . . . . [c:2|t:3|true] ORAddress 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.15 (keyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (4 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (1 bits)
							0780
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.37 (extKeyUsage)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.1 (serverAuth)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2 (clientAuth)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19 (basicConstraints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.14 (subjectKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							aae4d143c47e735d3c3d46cea07aee5baa836021
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (73 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.1 (ocsp)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.o.lencr.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r3.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17 (subjectAltName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kulina.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kulina.cz'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (12 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.23.140.1.2.1 (Domain Validation Certificates Policy)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018dd09ad4e30000040300483046022100d7d83b948b7a86c605d6b56016c4e56979ff6070f78c65fc1e689d1e15f50274022100e04eda2d2bc81fead71aeab4b6948135481a5075560db32f0e5f7f4b5a98da72007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018dd09ad6c8000004030046304402201e9507466978e311980859bb158c9b2247b18a294a09070b68b83276142f2449022078900565b52b897b90cf54d7802e96f9354a8be92547448a78625487c16239c4
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11 (sha256WithRSAEncryption)
 . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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