DV SSL/TLS Certificate for zwartbos.nl

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the zwartbos.nl DV SSL/TLS Certificate

This certificate with serial number 06:29:65:88:01:30:40:ff:a2:63:eb:53:a2:93:1e:d8:f5:d5 for zwartbos.nl was issued on by Let's Encrypt.

With 3 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 zwartbos.nl 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): 06:29:65:88:01:30:40:ff:a2:63:eb:53:a2:93:1e:d8:f5:d5
Serial Number (int): 536760250838372471609378001987717366871509
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 45:da:58:34:a8:04:bb:23:67:9b:4b:92:96:d2:72:9b:ea:26:7b:21
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): 4b:95:18:bf:f4:f8:e4:11:fc:ad:9f:d9:ac:c2:43:4b:9c:bb:28:6f
Fingerprint (SHA-256): ff:fa:62:a0:78:ea:22:19:c3:dd:ac:9f:e7:17:8f:36:cb:4a:68:bf:6e:0a:a6:c3:fa:8f:75:08:3d:32:91:da

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

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/86.crl

Check the revocation status for certificate zwartbos.nl
3
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

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

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for zwartbos.nl in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyDmLpLQZlxuBTIRi+npo
MelPd8BQc5eNhMmtdVcEbtYNJwcwYjxj/rHowqU09DXR0YhjdD3fcouoiX5iq42K
R91MmDY4XQyNrpHdD5yZsv/43J7e9VDPjyJXLmu6dbLPysPCcEIVmMX3CtBJcJLy
bQDl6StxQ4r11gePw1LyctxzdCHMO/aHRAHUdsCWK50VhJFoIUsKDi/ywX6io7Op
Haef44OlSbWZX4dXtGpn8W/Df+crmED0Rv+NCvrThidlXMN64+Dzmsvvqly4AeLR
WytuJ0Uhwk3S77vQK0L8a4Y3ttnlhBAnc3a0KMkjCMDf4H/f/90svQ6ZLzFtCdDz
3wIDAQAB
-----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 536760250838372471609378001987717366871509
 . . . . . . . . [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 2025-07-03 17:10:20 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-01 17:10:19 +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 'zwartbos.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
 . . . . . . . . . . . . . . . . [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 25276037727964921774640628445629083530868195432594264805514117101453565494474915987276763613752231630142290759929962222344983539741216824323772606912080315452323995313340631209146239631133260670984559004676853079767931267093092772721937550913386607970912964372424088702315451589319005504899040909653932080493455995878171899929002591097708132144131042668716085990609774156316397449159147472474139738699527953842006392471357356546277625801889316218956063347135961264415456220372458281778906787629235095744267397755178255803602124786879202477259762493965067049671308376782708129468791797941403241167829033901648826659807
 . . . . . . . . . . . . . . . . . . . . [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)
							45da5834a804bb23679b4b9296d2729bea267b21
 . . . . . . . . . . . . . . . . [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 (53 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.zwartbos.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.zwartbos.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zwartbos.nl'
 . . . . . . . . . . . . . . . . [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/86.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)
							00f0007500a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197d17a1eb20000040300463044022059dce1b9c5b6d00e027ae49333ca8a6d513ec56c6660ca5694cabae41f8a917902205219e090d058ab0b17e2bbb95598aa54eb0277c23f826029944c37777dcd9dc8007700dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a00000197d17a26cd00000403004830460221009c88bbacb2f8f60094c217d8d111090b6fe744e06f0ab934a3df9bce1aef3476022100da44e76b36497756e62acae3af818a17010972c45164f6a9d5a6f1ead7c0c275
 . . . . [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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