debudgetconsulent.nl

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:65:e1:68:5d:66:da:69:e2:c3:ff:ad:92:63:4e:e8:bf:02 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=debudgetconsulent.nl

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:65:e1:68:5d:66:da:69:e2:c3:ff:ad:92:63:4e:e8:bf:02
Serial Number (int): 296004995046633379899432046006588137848578
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 84:16:d3:20:90:35:c6:c8:2b:6b:6d:c2:39:61:2f:7d:41:21:73:88
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 48:f2:8a:1a:3f:7c:f7:c1:8b:f7:4c:de:23:b5:e6:f4:68:83:54:e2
Fingerprint (sha256): 00:01:42:c5:f7:62:59:0c:8f:1f:65:1e:9a:bd:b4:e2:02:99:71:79:ae:10:31:95:76:ba:bc:3a:20:4f:52:98

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 debudgetconsulent.nl

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for debudgetconsulent.nl

Public Key Algorithm

RSA

Key Size

4096

Signature Algorithm

SHA256 with RSA

Key Usage

Digital Signature
Key Encipherment

Extended Key Usages

Server Authentication
Client Authentication

Extensions

8 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

debudgetconsulent.nl
www.debudgetconsulent.nl

Other certificates including the domain name debudgetconsulent.nl

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

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 296004995046633379899432046006588137848578
 . . . . . . . . [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 2017-04-02 17:35:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2017-07-01 17:35:00 +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 'debudgetconsulent.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 1017257276443743513439462443787280880455142292466086317628368035335873951400065300844068283877520362872091628742240237113095989214559734530659900522888464980556546855476201535572055685660056316644257442661509476236829684100438295162450884799896394728016605516177361326711959886072251377130342094053019343143933926342008358700463413237540561373402125839063369294593542306081317837040500748186275297196337439859167775629073277889759573708896552110574121216786988919049917622719148659427403071972024953805825347446691486495541256555004523203001881254715540810551596945420660766540658761386659879314371827947202793892916768478252028746111322280224832332951749782385286830101920341722173521341387318571184702535109274840388513756724627721513438186873079710646906264046880434601662764913464289638333695475860599337684939495941295447068018039152169763323798181118124833912414052731142226141440416661645826741909955324724725221470415880203492143433338617394078550357797722837999814288909022640880771465162405070077997949862365258838575579255662620854733149759720419024582205247744172097390470652118190650219762709627156902141256282881569421653239639304996548182261636879536370087684222048472241692799736635326965462122483162402760583837283981
 . . . . . . . . . . . . . . . . . . . . [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)
							8416d3209035c6c82b6b6dc239612f7d41217388
 . . . . . . . . . . . . . . . . [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 (100 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 (50 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'debudgetconsulent.nl'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.debudgetconsulent.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 (246 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 1.3.6.1.5.5.7.2.2 (unotice)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/'
 . . . . [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)
		00628b7e32b712a7fac76ec27a3be9f71456d5f0c35c5bfd2197e39606577034b0c571d52be307061261539928932c341b62ff6fa1098db27b04f575780a889eaa2259777e3b45c73827d060371e05600e3a8af2fa39c7c3c15e0540f5867359a7d2dfa2544f18ada10151875c585dd75ae8a4f412ccc3cac64d3f4c7a4b22374c3811859643c547341402082602e66dc86bb644ee50b1a273b1f47a387b4ecb1ed2fdb980e1fc2b864f65fea5ea216dae646456f4cefb8931b083deb7bfbc2f63e9d9f06ef983b7a1148ccded573f65138b18a0239a7a4b98db2aa8ab8f222d8acfa80f312196bda03e10bda345b81d2123620a5bf1c3b0996ae1c926e37a841b