www.koldeweij.nl

Issued by R3

About this certificate

This digital certificate with serial number 03:79:47:d9:bf:00:55:fa:7a:49:0e:6b:b0:99:f3:8c:7e:18 was issued on by Let's Encrypt.

With 3 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=www.koldeweij.nl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:79:47:d9:bf:00:55:fa:7a:49:0e:6b:b0:99:f3:8c:7e:18
Serial Number (int): 302606529982800168435746718733677378698776
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a9:dc:d8:6d:cf:4b:12:9d:24:cd:81:d2:29:42:71:25:e0:40:ab:74
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 07:fa:cd:be:b1:86:e3:6e:6f:77:8b:48:b9:a4:be:fe:21:14:2a:28
Fingerprint (sha256): 92:4a:bc:8b:84:75:44:23:8b:27:f8:06:a5:bb:a6:9d:1d:f1:45:6b:1d:e8:a1:64:aa:0f:fc:8f:dc:89:8a:29

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

Revocation information

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

Check the revocation status for certificate www.koldeweij.nl

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.koldeweij.nl

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

koldeweij.nl
webmail.koldeweij.nl
www.koldeweij.nl

Other certificates including the domain name koldeweij.nl

(limited to 100 certificates)
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl
www.koldeweij.nl

Certificate

The complete raw certificate details for www.koldeweij.nl in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFETCCA/mgAwIBAgISA3lH2b8AVfp6SQ5rsJnzjH4YMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yNDAxMDgwMzI5MzdaFw0yNDA0MDcwMzI5MzZaMBsxGTAXBgNVBAMT
EHd3dy5rb2xkZXdlaWoubmwwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIB
AQCbQ9MOJsQQjiepZ0PoB21ca5SIXqugJrmb2LHuOeQFSKUfyK7qJRskglJHAkl0
NEzddnmc9azjFZtrygpikLvtPdFv/QjbXHRNB4U7/4SZ67lW4gZmlJ8E50jZPBEG
SipQ4AwueXfulivVkdrOgmiBnSNGNyfsCl9BAOBQOj1JSlrh0jUz5JVihD6B94U6
Mf74Vv/9m/YaueEaB+feGn2T3chE8smRbNT0Yz5pPo5jO4bHMk7FvGTzTKeGoLS/
YwZQvYHElLjX9/19iASIsJkMv2FTxu4/lyHNaDfkSLKiuIB69ytU3wXgS4QFUo1A
KE+QPSETySpBClV38C5VTPdXAgMBAAGjggI2MIICMjAOBgNVHQ8BAf8EBAMCBaAw
HQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYD
VR0OBBYEFKnc2G3PSxKdJM2B0ilCcSXgQKt0MB8GA1UdIwQYMBaAFBQusxe3WFbL
rlAJQOYfr52LFMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDov
L3IzLm8ubGVuY3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5v
cmcvMD8GA1UdEQQ4MDaCDGtvbGRld2Vpai5ubIIUd2VibWFpbC5rb2xkZXdlaWou
bmyCEHd3dy5rb2xkZXdlaWoubmwwEwYDVR0gBAwwCjAIBgZngQwBAgEwggEEBgor
BgEEAdZ5AgQCBIH1BIHyAPAAdgBIsONr2qZHNA/lagL6nTDrHFIBy1bdLIHZu7+r
OdiEcwAAAYznVU+oAAAEAwBHMEUCIQCePwT7cN7WRPAafeN3jlfuvYA/FYyo3Ns7
HuMB+YREsQIgO9POgP8Y6Cfw8NLivRwqr5mTG0izdyFZNACFmZWC7oMAdgCi4r/W
Ht4vLweg1k5tN6fcZUOwxrUuotq3iviabfUX2AAAAYznVU/AAAAEAwBHMEUCICJP
PrruMLyWNqdWIOwEDfvvfNl5eElrkpbme8Yk6Me7AiEAkCN98yz0LOwytJ8n4d3g
4jRlCm5SoFGU91b/q6zK4N4wDQYJKoZIhvcNAQELBQADggEBAFQpzjmYZwZ36+2N
ranQsy3xtSJcs6laK9sTeC/T6flTbAN08PdHB4YdM5TM3gHEOJnEri8OYF6fqLbk
qjc295cHOt46XlJJKoHZ2YKm6X80epKmJGOHzjRBQCB5EqMuPbY6aFMZzvOdnl6H
IP92VN5dUZ21ApGk1gEQ+tvXl80cnnXxGlRBUHA8euEzvHDqh0RTUgUQ9wrOR2o/
VzFy+E8ABq+o8VwTYCdHOSTU6wOfnPgX7Zjxtnlkyxdv1M+1sytLuYvviWJNvvfa
EaGka8uIf5yjHWM9tcg8K1apNy3UiML/lJSGLXlQ8Ly2JO95OMX+6OO5v6N3py5p
ifx8IkY=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAm0PTDibEEI4nqWdD6Adt
XGuUiF6roCa5m9ix7jnkBUilH8iu6iUbJIJSRwJJdDRM3XZ5nPWs4xWba8oKYpC7
7T3Rb/0I21x0TQeFO/+Emeu5VuIGZpSfBOdI2TwRBkoqUOAMLnl37pYr1ZHazoJo
gZ0jRjcn7ApfQQDgUDo9SUpa4dI1M+SVYoQ+gfeFOjH++Fb//Zv2GrnhGgfn3hp9
k93IRPLJkWzU9GM+aT6OYzuGxzJOxbxk80ynhqC0v2MGUL2BxJS41/f9fYgEiLCZ
DL9hU8buP5chzWg35EiyoriAevcrVN8F4EuEBVKNQChPkD0hE8kqQQpVd/AuVUz3
VwIDAQAB
-----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 302606529982800168435746718733677378698776
 . . . . . . . . [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 2024-01-08 03:29:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-07 03:29:36 +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.koldeweij.nl'
 . . . . . . . . [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 19600382745011539835121887644899118752528796340808412253770955839729501557691555270241012663378860393579251679604592991970715669451196201130989515519673213217513224172411707605779727339498036520593362070776321880930062619167217537512273296064928418032782940588297373383223189156949979597409643044659206006435849775809876970816772683200807285487503436563445787294872474246976163375710256242432304234885596598278785624522967882186365098920941346341821532765304958576843311923581008424719192094088187783144219988891096302873947568120251682443327568025240935952011973526431153130845805440450454064268228999197512629548887
 . . . . . . . . . . . . . . . . . . . . [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)
							a9dcd86dcf4b129d24cd81d229427125e040ab74
 . . . . . . . . . . . . . . . . [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 (56 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'koldeweij.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.koldeweij.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.koldeweij.nl'
 . . . . . . . . . . . . . . . . [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)
							00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018ce7554fa800000403004730450221009e3f04fb70ded644f01a7de3778e57eebd803f158ca8dcdb3b1ee301f98444b102203bd3ce80ff18e827f0f0d2e2bd1c2aaf99931b48b3772159340085999582ee83007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018ce7554fc000000403004730450220224f3ebaee30bc9636a75620ec040dfbef7cd97978496b9296e67bc624e8c7bb02210090237df32cf42cec32b49f27e1dde0e234650a6e52a05194f756ffabaccae0de
 . . . . [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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