cupp.nl

Issued by R3

About this certificate

This digital certificate with serial number 03:7d:f9:39:eb:c0:59:64:06:fb:fd:3a:ca:d5:49:10:d3:2b 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=cupp.nl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:7d:f9:39:eb:c0:59:64:06:fb:fd:3a:ca:d5:49:10:d3:2b
Serial Number (int): 304203432173875157562641341032044667392811
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 36:d2:05:d3:45:d6:2b:92:21:d4:56:00:57:3d:e5:ac:3b:bb:6c:7f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 7e:3b:55:9d:ab:42:0a:be:cd:df:d5:41:e2:c1:72:61:3a:20:db:8d
Fingerprint (sha256): 0a:cf:fa:77:b2:fe:94:81:02:cf:f9:f8:84:bf:42:52:ce:23:fe:b5:fe:78:ca:69:d0:77:f1:27:e5:af:e4:29

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

Revocation information

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

Check the revocation status for certificate cupp.nl

3

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cupp.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

cupp.nl
mail.cupp.nl
www.cupp.nl

Other certificates including the domain name cupp.nl

(limited to 100 certificates)
cupp.nl
cupp.nl
cupp.nl
cupp.nl
cupp.nl
cpcalendars.baristaworkshopamsterdam.nl
horeca.cupp.nl
cupp.nl
cupp.nl
cupp.nl
links.aoec.com
link.eupd-research.com
cupp.nl
cupp.nl
cupp.nl
cupp.nl
link.eupd-research.com

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE9zCCA9+gAwIBAgISA335OevAWWQG+/06ytVJENMrMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yNDAxMTAxMzM2MzRaFw0yNDA0MDkxMzM2MzNaMBIxEDAOBgNVBAMT
B2N1cHAubmwwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCdDxBlRADV
n2wjxB6r1KFgcdwc/mr6MO06klZ8Rk3A1SsA20nvDhxnHDp7ypkl9zngTTlUHVI3
gnhbeaW2E2d6A3yiLBlkN5NW34XCAWmAedcTFrfAHwaE35gkfeKh33Qszd4tRdZG
hDi8fLLwNuTby4AxhdBfRgChqifGDCPMXGvfi30d3svc5nT+qkxvsR1DTF9Mm1Bf
MFhI7D37JAxusswL9kGnDK5VuQYTeXBeOiW3r+LQbU5nfZT5RRiqXhS+GaO9eONr
KPdUNhStrfkDm+Oqn3j9ihJgWvGMByCk3TfxLS7uLPUhq+UocJvgWW7SI6ZlySio
oJaBHKIjz9+9AgMBAAGjggIlMIICITAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw
FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFDbS
BdNF1iuSIdRWAFc95aw7u2x/MB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52L
FMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVu
Y3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMC0GA1Ud
EQQmMCSCB2N1cHAubmyCDG1haWwuY3VwcC5ubIILd3d3LmN1cHAubmwwEwYDVR0g
BAwwCjAIBgZngQwBAgEwggEFBgorBgEEAdZ5AgQCBIH2BIHzAPEAdgCi4r/WHt4v
Lweg1k5tN6fcZUOwxrUuotq3iviabfUX2AAAAYzzzbcqAAAEAwBHMEUCIAWDyhJH
6qyGJ79yZOXO/mbQJTn1v7b/j33yQNQFd6ONAiEAs5p45AMWZcspSM/DHTrDP01R
mlHzaDhM6dd+9Wowy+cAdwB2/4g/Crb7lVHCYcz1h7o0tKTNuyncaEIKn+ZnTFo6
dAAAAYzzzbdnAAAEAwBIMEYCIQDEd347xmI1t3zXssZkRM8TmNKkFOyu/BjC6F1V
68krmQIhAPT+tpvhoCW4CkCSvyJjFxtPVMn18gItxtae4G/cuzDTMA0GCSqGSIb3
DQEBCwUAA4IBAQCHZrl/Rek6N+oDKP4V4sVmULVr5V28iFkX2H/Q1MsPCdIk+prT
7I3a56SbEXWUDzl1UJ9Ty2q8t5ASmXktkXkVzddxhuy6szR7sUqlfFl37KPcFHtc
KPyJJ32+L6RVrrjaakCypQpR579b0KIYb3EeOhLM4Vott0j4uBy/J1+UxeW6lHYM
349YC5WG0Fn3qMDUeXHlnZ6zpA8XSbxl4UO1FcgH7iolW96U16W2gL7sLydwKRC0
aM+6auSgCI7lFmVTFXAhZs7ErTKeO53dJ7o0khhufcozpT0BkJ3dlRd0uITMoDCX
G6AYAtCe+TAmMUO+vhKS9dyOrrAFuSTHzz2e
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnQ8QZUQA1Z9sI8Qeq9Sh
YHHcHP5q+jDtOpJWfEZNwNUrANtJ7w4cZxw6e8qZJfc54E05VB1SN4J4W3mlthNn
egN8oiwZZDeTVt+FwgFpgHnXExa3wB8GhN+YJH3iod90LM3eLUXWRoQ4vHyy8Dbk
28uAMYXQX0YAoaonxgwjzFxr34t9Hd7L3OZ0/qpMb7EdQ0xfTJtQXzBYSOw9+yQM
brLMC/ZBpwyuVbkGE3lwXjolt6/i0G1OZ32U+UUYql4UvhmjvXjjayj3VDYUra35
A5vjqp94/YoSYFrxjAcgpN038S0u7iz1IavlKHCb4Flu0iOmZckoqKCWgRyiI8/f
vQIDAQAB
-----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 304203432173875157562641341032044667392811
 . . . . . . . . [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 2024-01-10 13:36:34 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-09 13:36:33 +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 'cupp.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 19826842237213565548869369350361001164767578711517763951072794795860786597457845764221606497071531556688588581761172373316465610393309952159453089567567782336074998835685440141499585992179043307150216655018940347201181422580957287782381305243751878398856539904582446718686405612916160520968512988964205102495083148967320748898500768041099764352514951237388931170876925480386536354483380373683378204365563408577368105258983851625126883439389224683845029398720321455213465385872265911897384231837790868826790537322411659227543637507209128529807288515684144734493025826583628389663605920741362083230943166493135981240253
 . . . . . . . . . . . . . . . . . . . . [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)
							36d205d345d62b9221d45600573de5ac3bbb6c7f
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cupp.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cupp.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cupp.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600a2e2bfd61ede2f2f07a0d64e6d37a7dc6543b0c6b52ea2dab78af89a6df517d80000018cf3cdb72a000004030047304502200583ca1247eaac8627bf7264e5cefe66d02539f5bfb6ff8f7df240d40577a38d022100b39a78e4031665cb2948cfc31d3ac33f4d519a51f368384ce9d77ef56a30cbe700770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018cf3cdb7670000040300483046022100c4777e3bc66235b77cd7b2c66444cf1398d2a414ecaefc18c2e85d55ebc92b99022100f4feb69be1a025b80a4092bf2263171b4f54c9f5f2022dc6d69ee06fdcbb30d3
 . . . . [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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