www.klopotek.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:d8:25:c8:15:86:8e:81:cc:26:5b:a0:db:1b:f9:f6:05:42 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:d8:25:c8:15:86:8e:81:cc:26:5b:a0:db:1b:f9:f6:05:42
Serial Number (int): 422000355313770722787899862901413937284418
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: f5:61:49:e3:1e:0f:4a:71:f3:ad:18:71:1c:ab:e3:91:bd:59:0d:14
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 52:fe:05:eb:c8:e4:67:29:c9:1c:3e:a7:1e:9f:bd:ba:7f:fe:3f:11
Fingerprint (sha256): 2a:fb:a5:91:2b:62:6f:61:cf:8f:50:1f:38:43:43:74:b2:2e:87:0e:61:9d:05:1f:26:d0:01:6c:c2:82:de:1d

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.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-----
MIIFZjCCBE6gAwIBAgISBNglyBWGjoHMJlug2xv59gVCMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDExMTQwMDE5NDJaFw0y
MTAyMTIwMDE5NDJaMBsxGTAXBgNVBAMTEHd3dy5rbG9wb3Rlay5jb20wggEiMA0G
CSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCw0hP4a693yMSG59vCw9gU6y/yr2uZ
qRmqy6qRMGIxiJZbxTn7qrcfX0Lb9BmbgGLl7AAZOe+Gk/M7Kr4sgZpzge+MBAMv
vd6tMRIjqpk3XHIHMyKGP/pzYAM9gV3PMuJV9S2agzFqF7OXU2UqrFEo8isY3mc6
WggZmfdVDCw8tERgHQNmsqSFkVSSqvJFMJkRpZsD5WXVUna4ScsLV+2LG2GpynzY
wvIwU/OReAxzq3gFNfaeZByU28EyLNLpRjy6c/SJq9nK8psV6YV0db+zoleu3Zd6
Yr6LyCTcBDmoVuvVEQfPkwap6lQrbo7lRW06WPJT35M/TNvXRrwh0dWJAgMBAAGj
ggJzMIICbzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsG
AQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFPVhSeMeD0px860YcRyr45G9
WQ0UMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEB
BGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0
Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0
Lm9yZy8wKQYDVR0RBCIwIIIMa2xvcG90ZWsuY29tghB3d3cua2xvcG90ZWsuY29t
MEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUH
AgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIEAgSB
9QSB8gDwAHYARJRlLrDuzq/EQAfYqP4owNrmgr7YyzG1P9MzlrW2gagAAAF1xFYo
UAAABAMARzBFAiEAodKkWpVLhSnkC9ArGRDo3mjompimkBXNlDi0Ph8aQZ4CIDcJ
lhp5i0jE1GLKrGnwWOtFFdOXg33/4AqREDXew+uxAHYAfT7y+I//iFVoJMLAyp5S
iXkrxQ54CX8uapdomX4i8NcAAAF1xFYoeAAABAMARzBFAiEAns4WRZB6pg3uoPGb
btE++iIwwncEakk+o5ailWfiM+QCIBTx9c6sDwcchR7Iyvd5FsgjHrVB6JHGv9xM
wmpBZLVNMA0GCSqGSIb3DQEBCwUAA4IBAQCah0m9Y2BgTt+dbYrCOpmKBX4czUyT
Ym8M97wtvCK2NmzBquZAvr1mwxCTs72fSZJsDjoozImyF0P8NjM0HRJyXPhDSFPt
SBVag6nRkPp9SgqurZnbJWrR9JmqP288M0G9pgow7pPgOyz/TsPW401UoR7/vzqZ
TSb5Cfxh7uvuvnuxBH5CKBs/J3CdzPvbtKdF6qCy0CoNxrJ+jq+JnTxHFFSOvh/X
HOhLLswwkhbqqhti+5Z0p3VXBZ97lUi8WRYcb1RQAWAENZq8Iu7OcdG71Sf1CAy7
E7U0yVYHDrW6Tanb6Tt8y6DPuedwCresiuMx9vbLrXYybJ14dwn/FHnr
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAsNIT+Guvd8jEhufbwsPY
FOsv8q9rmakZqsuqkTBiMYiWW8U5+6q3H19C2/QZm4Bi5ewAGTnvhpPzOyq+LIGa
c4HvjAQDL73erTESI6qZN1xyBzMihj/6c2ADPYFdzzLiVfUtmoMxahezl1NlKqxR
KPIrGN5nOloIGZn3VQwsPLREYB0DZrKkhZFUkqryRTCZEaWbA+Vl1VJ2uEnLC1ft
ixthqcp82MLyMFPzkXgMc6t4BTX2nmQclNvBMizS6UY8unP0iavZyvKbFemFdHW/
s6JXrt2XemK+i8gk3AQ5qFbr1REHz5MGqepUK26O5UVtOljyU9+TP0zb10a8IdHV
iQIDAQAB
-----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 422000355313770722787899862901413937284418
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-11-14 00:19:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-02-12 00:19:42 +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 22321535001412120188647906074991666659639722761809521204099594901374622423692865681526360502201064742072400951915477422038434136167077989552731101200075811398079043851620305597221352722681133961328633103071483090826780133289990438000359984211500757207508070608358408216301789913278240993423881639119298447814836893888092907410955507604824409245872258620745622311346217245068975971669935158184088826961545231915005817821653594108823789770252858344687504631936855354396943592990302408667568331119772945470050834872718543825487555272843638287753764126097881819447116776706243692459558737147496577377085537803480715089289
 . . . . . . . . . . . . . . . . . . . . [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)
							f56149e31e0f4a71f3ad18711cabe391bd590d14
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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)
							00f00076004494652eb0eeceafc44007d8a8fe28c0dae682bed8cb31b53fd33396b5b681a800000175c45628500000040300473045022100a1d2a45a954b8529e40bd02b1910e8de68e89a98a69015cd9438b43e1f1a419e02203709961a798b48c4d462caac69f058eb4515d397837dffe00a911035dec3ebb10076007d3ef2f88fff88556824c2c0ca9e5289792bc50e78097f2e6a9768997e22f0d700000175c456287800000403004730450221009ece1645907aa60deea0f19b6ed13efa2230c277046a493ea396a29567e233e4022014f1f5ceac0f071c851ec8caf77916c8231eb541e891c6bfdc4cc26a4164b54d
 . . . . [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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