www.contrera.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:47:09:c5:c3:a7:b1:36:0b:17:5c:f0:6b:32:6a:3c:88:15 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=www.contrera.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:47:09:c5:c3:a7:b1:36:0b:17:5c:f0:6b:32:6a:3c:88:15
Serial Number (int): 372622181681226633129361667619852723718165
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 79:5d:79:d8:f3:60:0d:c4:7c:69:64:fa:cf:3a:3f:f9:9b:98:97:e1
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b3:ec:e8:82:81:63:d3:a1:17:2d:44:d9:bc:4f:43:23:b2:51:a4:08
Fingerprint (sha256): f8:76:6d:2f:cf:6b:72:a1:79:a8:42:b7:6a:b5:5f:ab:73:0f:d8:60:ba:4e:69:14:c1:cd:a4:94:bf:3d:5b:26

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 www.contrera.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.contrera.com

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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

www.contrera.com

Other certificates including the domain name contrera.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.contrera.com 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 372622181681226633129361667619852723718165
 . . . . . . . . [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 2020-02-06 09:04:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-06 09:04:55 +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.contrera.com'
 . . . . . . . . [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 829046856688876619596661183231561399087574139012870907741410632155584639644832086307962845330237120630731072906364049067785608112760324521492205033844406670962957177012737215251920580841354680915961890631211504364444737654337739416193901641491731241083308161570805533813832251323597781320609993533046998748016921016229945331452723184610311083360487844233212026692209936446402505215777871864786813056721628636414672112603852648729701774768695916092916193980520316433513347148494190793720008693467865263273071915463461644395090030550866710901083206419171036183125283467306393416802377541402478723043873244142300630963845887323525334034469440692401615736364849552135931812803182832638450872928599654274300697751945876738180434930145275603454490661096796471023073117806320520764069782503676032752447285893440030288800203898837688068325749839671155331056176686115665046428195099259748442189696849655366820263701373572056180808599924750746416871435708909726570741817388120694400185617383517162513943335970254960125762596617595943779106865275792817579394194555216187852016999541758019249452047506831717907892272266050511570888663991723542115755090310637339356358582512094894886784233764488560664659083644727445723652048124352187197446259181
 . . . . . . . . . . . . . . . . . . . . [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)
							795d79d8f3600dc47c6964facf3a3ff99b9897e1
 . . . . . . . . . . . . . . . . [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 (99 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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.contrera.com'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000017019f5acac0000040300483046022100fe1974122073be1a9d4f8c32fb16e1375223f15238bb1091db7877d8b2233d37022100e890a956458f1a82ec8daac434a57ba006aa963c551effbd2182cc2acd842da7007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000017019f5aca8000004030047304502210088a7705036f56147700270061f60dd6babb2161565362c532ff8a6901d654fe902207e01c49e1b35aa80b37f0dcc4a3ccdd054dd55080b38236442ae581f2226c8c0
 . . . . [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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