www.klopotek.com

Issued by R3

About this certificate

This digital certificate with serial number 04:d0:65:3d:0e:1a:f2:8f:63:2e:a9:1e:d5:13:ce:b5:e5:c7 was issued on by Let's Encrypt.

With 2 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=www.klopotek.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:d0:65:3d:0e:1a:f2:8f:63:2e:a9:1e:d5:13:ce:b5:e5:c7
Serial Number (int): 419362445090367569508164388784008150246855
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 20:8c:10:4d:ec:4b:94:0f:9c:4e:a3:32:83:37:46:ea:42:48:c3:79
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 15:a0:49:eb:2d:82:c9:1a:b4:91:dd:2d:e8:d0:c3:f6:20:9b:b7:4f
Fingerprint (sha256): fd:b6:d7:d0:f7:66:cc:4e:3a:69:12:a5:3d:e5:a6:9a:c2:22:3f:ab:f2:f4:ef:95:2e:8b:31:58:ae:50:2f:32

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

Revocation information

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

Check the revocation status for certificate www.klopotek.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.klopotek.com

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

klopotek.com
www.klopotek.com

Other certificates including the domain name klopotek.com

(limited to 100 certificates)
klopotek.com
webmail.klopotek.de
klopotek.com
*.klopotek.com
klopotek.com
www.klopotek.com
klopotek.com
klopotek.com
klopotek.com
webmail.klopotek.de
klopotek.com
klopotek.com
asp-citrix.klopotek.com
www.klopotek.com
klopotek.com
*.klopotek.com
saas.klopotek.de
klopotek.com
*.klopotek.com
klopotek.com
klopotek.com
www.klopotek.com
sip.klopotek.com
saas.klopotek.de
*.klopotek.com
klopotek.com
autodiscover.klopotek.com
*.klopotek.com
klopotek.com
klopotek.com
mail.klopotek.com
klopotek.com
*.stream.klopotek.com
klopotek.com
klopotek.com
*.klopotek.com
klopotek.com
klopotek.com
*.klopotek.com
*.klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
klopotek.com
www.klopotek.com

Certificate

The complete raw certificate details for www.klopotek.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAx+UxLY+n4rJB9vphmhpZ
nsbXqjgLnTjWai8qK4RFmRDyCVV9BnGaMPZFGlCNqrEUegtdsXGEdY1aeCPAdFCB
mQ96797994+gcSej7/z5MMIdkUJanIxakKMy1tC8G2Qu0o4aHJoGJyuPBt9gZVnL
BEaR0NiiOTv/RnAa6Z7ZWhv6pumepa74Kjvh3qXYufDAVrFWCJ90D7aZPDQa2OQD
yvc8oyV+qE5xNIOIyYMnA3vzDzG+TV6N8inZqDNNkYOV+SakM4JelDJujGLeBXGO
Gm8Mn9ttPmQI105KkNHGFzgmgPbpoZCiyPqlcGfcBK/OwFkKu2B9Ftl9YrEVDUK6
FwIDAQAB
-----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 419362445090367569508164388784008150246855
 . . . . . . . . [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 2021-03-16 00:19:09 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-06-14 00:19:09 +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.klopotek.com'
 . . . . . . . . [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 25234441525744394512764429263838793043240771078429820061153603601137193605484677778598669832870702465382716629433129535051365337575781365689323323400676578188546407246860128635771553495445573728680512929435801431461801324686783185976950178631116567328210019965254850313437724608295120163711096210824902853418405476863296044163446716390372317243124958212072403289660651211151103038739962562060140447333716831228085773545803007203847553818364242789288105502618648461833656892732807009929837735434626244814774399914531570034264917236879555477413284127263912552908547371657260436296751825345026348191627683561295055075863
 . . . . . . . . . . . . . . . . . . . . [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)
							208c104dec4b940f9c4ea332833746ea4248c379
 . . . . . . . . . . . . . . . . [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 (34 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'klopotek.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.klopotek.com'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00f00076009420bc1e8ed58d6c88731f828b222c0dd1da4d5e6c4f943d61db4e2f584da2c200000178389d820e00000403004730450220097f64c64cb699bd54404e9fdc4705941e765a8deba21299874e2f2187a400d4022100d278e18c44433ddc7c66b3087578fd51ecf115e92adea66d69a15366d963ab02007600f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e300000178389d82050000040300473045022100c4eb7740f562b4e3a41844baf7dba736c5e62fbcba9fd2a1e0c2fee0cd36f6b6022027f98ed213185e8996d3024bf8724d3872e22a71b9b460804bfe1464e04ac915
 . . . . [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)
		00a72b0617283a125b03b8453e72c40f5a478b52f084910f35f95a5f5cfed898b1d25db93b7d6598ae4344cd192684d89648d39a794260317e95e05ad2fb33fd2a97426b933de828412595213704096a61b030f304cc4a4f2443b84d66d8e62a0b3ff57fd6adba5ec4f664c114b1ffa2aa46374dfc0bace923816353ba1b89466d30a406a2ceaf629885c51ff5f8096140297a9c11daa5ff91a552640761c3c0cae47d2daf7c3cfe77f6a12df6a152663a277e2e1af52c61d3c535bfdb7669b43be26b099030ab701d5631faa752d52fba730790ece73706ee202aaf7a5a70e54f535e720f0258e6c174cc15342483c91c276b8dc5b6373e38962ab56071a9d906