api.improvit.nl

Issued by R3

About this certificate

This digital certificate with serial number 03:5c:42:2b:10:3f:92:db:ea:6a:f5:ad:47:8b:47:a6:c7:4c was issued on by Let's Encrypt.

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=api.improvit.nl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:5c:42:2b:10:3f:92:db:ea:6a:f5:ad:47:8b:47:a6:c7:4c
Serial Number (int): 292730788198049178593722447251697673094988
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 13:a6:9e:b7:ae:8c:99:84:82:89:b0:2c:d7:e9:f0:ac:5c:07:88:8c
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 24:25:d9:08:77:dc:29:b3:25:21:ac:58:de:e9:ae:cd:71:90:60:02
Fingerprint (sha256): 81:8d:d0:74:c4:9b:74:33:7f:27:88:d5:41:6b:2e:c6:da:c8:d8:aa:3c:e0:47:e5:01:5c:f9:02:67:06:dc:91

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

Revocation information

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

Check the revocation status for certificate api.improvit.nl

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for api.improvit.nl

Public Key Algorithm

ECDSA

Key Size

256

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature

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

api.improvit.nl

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improvit.nl
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support.coursekata.org
support.coursekata.org
onboarding.leadsrx.com
improvit.nl
onboarding.leadsrx.com
www.improvit.nl
api.improvit.nl
improvit.nl
app.improvit.nl
onboarding.leadsrx.com
*.improvit.nl
improvit.nl
support.cncbotanics.com
*.improvit.nl
payt.improvit.nl
support.coursekata.org
support.coursekata.org
onboarding.leadsrx.com
email.app-mg.improvit.nl
support.coursekata.org
improvit.nl
*.improvit.nl
improvit.nl
support.coursekata.org
support.kffinancial.ca
onboarding.leadsrx.com
support.coursekata.org
support.certusgrp.com
improvit.nl

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEdyMzfmH2y2b/gHKWBszEpY9bkyJf
bpxHcB5KRhYWgwr5CA5HgdH4mHJkm8Ar6yEmUwBA0N+070zKUMI/0xzu9A==
-----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 292730788198049178593722447251697673094988
 . . . . . . . . [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 2024-01-16 08:30:16 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-15 08:30:15 +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 'api.improvit.nl'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey)
 . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1)
 . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits)
				00047723337e61f6cb66ff80729606ccc4a58f5b93225f6e9c47701e4a461616830af9080e4781d1f89872649bc02beb2126530040d0dfb4ef4cca50c23fd31ceef4
 . . . . . . . . [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 (1 bits)
							0780
 . . . . . . . . . . . . . . . . [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)
							13a69eb7ae8c99848289b02cd7e9f0ac5c07888c
 . . . . . . . . . . . . . . . . [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 (19 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'api.improvit.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef00750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018d119b73630000040300463044022026a4df864ecaf0a16ccf78257fcc533a3c46705d4a0221ccff180e0cf151ec5302203ab30d19c11d126706260dd6bacaca0c7a6534da863ddce923a6660e501e3b940076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018d119b736b0000040300473045022058809ff2906fb380c676821fb4707a529911601231fed9a72a9e4ec404f53120022100d1d3de209b37a639ac4c74b44c8698b34e1eb274eb671a79ebaf20b09d6625d9
 . . . . [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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