krejcovstvi-vyvoj.cz

Issued by R3

About this certificate

This digital certificate with serial number 04:71:80:fd:56:8d:d0:44:b7:75:c0:59:16:23:86:fb:8d:09 was issued on by Let's Encrypt.

With 5 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate has already expired and will cause a warning or error message in the browser it's still listed on this site to allow you to look back on previously issued certificates. 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=krejcovstvi-vyvoj.cz

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:71:80:fd:56:8d:d0:44:b7:75:c0:59:16:23:86:fb:8d:09
Serial Number (int): 387072507779195564284897331353878720646409
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: dd:44:ed:a2:bf:f0:e6:f1:a8:dc:ab:4a:05:19:c3:fe:30:a2:e1:84
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 97:65:e5:33:42:2c:2d:3d:f6:a2:d0:5f:55:a8:6f:da:a5:3d:e0:f0
Fingerprint (sha256): de:f2:b6:4e:02:95:da:2a:1b:14:c1:a7:54:a6:e2:fb:d5:5e:49:21:78:e5:30:1f:40:b9:9b:5f:5c:51:6e:60

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

Revocation information

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

Check the revocation status for certificate krejcovstvi-vyvoj.cz

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for krejcovstvi-vyvoj.cz

Public Key Algorithm

RSA

Key Size

2048

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

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

jidelna.vyvoj.cz
krejcovstvi-vyvoj.cz
vyvoj.cz
www.krejcovstvi-vyvoj.cz
www.vyvoj.cz

Other certificates including the domain name krejcovstvi-vyvoj.cz

(limited to 100 certificates)
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
www.vyvoj.cz
www.krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
krejcovstvi-vyvoj.cz
www.krejcovstvi-vyvoj.cz

Certificate

The complete raw certificate details for krejcovstvi-vyvoj.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7qTKISzu+oCuTMCylDrm
DpWG0jEGUy5wp/wa+u1rK7+kXpP7VHCReMFxLLq2VycEP5Em/AMacvGKIXnW2Bk1
/n0IinhBQc28oByt7LWuA7bsWsJ2SEVXzn1FJBKlUNJfJRIfXr9vWDuv7vsrLEEm
A82VVYvD+4GKGdmMM/yV4iNOh6VBAhELY0JUvTAuyuqpUylIuaiKYUlCarthOwTX
79paItZ5HN14raABfE527qbgDvXvovFnMNeBYf4oyviVGefO08c3+fL8ObJkk2Xl
JRD1uJEzWYXxt08YJXJjEMIcJSRwt8YKXuTMt5SZXh4AzHqRb6mMntyoyH70qpC3
LQIDAQAB
-----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 387072507779195564284897331353878720646409
 . . . . . . . . [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 2024-01-12 22:06:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-11 22:06:40 +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 'krejcovstvi-vyvoj.cz'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.1 (rsaEncryption)
 . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 30125977346887124484399819112348732861808241361057695368071011675081936191252457978648607365161393402202913863476227790515264794181577978344629144735623928130811008092642156893868263022689285424681622776212998023052958527388848005591410065132008736332393101348864681714627451025160219508452884144417574737232765418091984610164686104119294226688498234578869797143930217778962186366406391480085688267792761742049740302138886864758496112777448457353217311181063646490550693651120827345102204503706469118765146822225673281095890445916547675477030053449474977594479895096278241098004612788592617616438881574862973561780013
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 65537

 . . . . . . . . [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 (3 bits)
							05a0
 . . . . . . . . . . . . . . . . [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)
							dd44eda2bff0e6f1a8dcab4a0519c3fe30a2e184
 . . . . . . . . . . . . . . . . [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 (92 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'jidelna.vyvoj.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'krejcovstvi-vyvoj.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'vyvoj.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.krejcovstvi-vyvoj.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.vyvoj.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018cffed77230000040300483046022100880a9459518c4cc3102e27952ddb4059b641193ad2b146655e8a2a0848aebbd0022100bab1161be57d2e23b01ce65a3749c675c2d3fb7235f0aa6394dd8dc68c3f00b8007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cffed753c000004030047304502201d301b2978137680fc0ee6a984cc06851318f28c0dd99ec8ee77abbe9625e6090221009bd86fb7e6d4875cace6e226b233069c57f5716cb9fb145675fe07fd755cb823
 . . . . [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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