DV SSL/TLS Certificate for www.itproficom.cz

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the www.itproficom.cz DV SSL/TLS Certificate

This certificate with serial number 05:72:8e:d1:4a:6f:c9:f0:6f:5a:e3:ae:a3:87:99:5e:a3:e0 for www.itproficom.cz was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for www.itproficom.cz provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:72:8e:d1:4a:6f:c9:f0:6f:5a:e3:ae:a3:87:99:5e:a3:e0
Serial Number (int): 474543456562988243765207949746432911516640
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 24:7e:39:f9:49:ce:ea:f5:14:91:bb:74:51:a6:33:e1:d0:21:9e:59
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): 2a:8f:66:37:81:e1:ea:a4:31:7b:b4:d9:f9:08:82:7f:d7:fc:72:a6
Fingerprint (SHA-256): 36:b5:ba:04:91:8b:ee:29:47:21:39:dd:92:31:9f:a0:7a:36:15:5f:8f:8d:63:7f:f4:cc:dc:28:97:5a:6c:04

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/97.crl

Check the revocation status for certificate www.itproficom.cz
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.itproficom.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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for www.itproficom.cz in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwLE+wP7Kyd+ZTRyy3Xy/
cnr0ax139eN+uyw/pMd3luprF6FivS8XXG9SLH1ois6wRyKR50k0YNna8vHGAJhO
/QhYA3lqJrMdXO0yqqgURRWidhkEHXgVV4pyLjqfgfFvYu7UiP/ne89Z6RAg5cTe
eNwBOvjWbRXJCX/Y9q+vqmalgY2PxL5A/v7LF1hP/TH/X0OhXYESfb4VTYK70b59
7YFeZIp9O3fNYUUHewWC5jX79v+G07n5LNtRBSMDAivMVJR1+GIx9cgqYC3Cgmsp
U+bRu2cAVKUB8ZisQivLyiRKhACjoilnCqrjCbkXtOrfUzmMT8LC6w9/aCu8d7E/
dwIDAQAB
-----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 474543456562988243765207949746432911516640
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-03 10:02:47 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-01 10:02:46 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.itproficom.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
 . . . . . . . . . . . . . . . . [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 24325157385805191816588464942594337043730535941429758307505820974540614446204265877253067734540067667600594228430375137199715485288650314558362920832561218646042358729443687527846995492849426159564231448796256222986072817262416155721617876488090439412551362659031652979907997120298924759856909055089523822691938518711082720621806778470926346637499489463734485267244633472554518500684212719519045853555613724367118253986576891683683668600926976517739964999613882872831082867574171545126683210586877240833913808067996819531110587257264046011296867218086093373905024717028752240219800747168384316121102483102915699490679
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							247e39f949ceeaf51491bb7451a633e1d0219e59
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (36 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'itproficom.cz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.itproficom.cz'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/97.crl'
 . . . . . . . . . . . . . . . . [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)
							00f0007600dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a000001973573ef3200000403004730450221008dcc76c176a278a2984c4c06f7f7b65eb3a7f322a0dfe7d7f77f7dd0d81cfcdb02206f3ea856d1f31fcb9564045e12714ae5ba4e57451c7a943622a2fd223f437c64007600ed3c4bd6e806c2a4a20057dbcb24e23801df512fedc486c5700f20ddb73e3fe0000001973573f6b60000040300473045022100facc5e6550799c1ead81c7382e296ff69dfed7555fa842f8e59c8b5f1aaf5bc102206efca55883cb6dedffaae5cb8f924cb619c0ecc4ac73f6f7ad672e0329329c44
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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