www.contrera.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:e3:70:37:85:cd:4c:77:b0:a3:b6:57:da:50:57:b8:f5:19 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): 03:e3:70:37:85:cd:4c:77:b0:a3:b6:57:da:50:57:b8:f5:19
Serial Number (int): 338730116912014817297514301399963375564057
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 0f:14:8c:fb:89:bb:13:1f:c2:90:77:3c:b1:94:fa:f0:2b:80:d1:c5
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 50:39:f0:fb:aa:34:35:20:7c:2f:b9:ae:7e:dd:cb:42:24:31:36:28
Fingerprint (sha256): a2:f1:c2:82:b6:47:79:cc:92:9e:af:1d:c6:f5:b6:43:b4:27:3d:20:81:5d:2b:eb:aa:f2:fb:14:c6:54:5d:1d

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-----
MIIGWjCCBUKgAwIBAgISA+NwN4XNTHewo7ZX2lBXuPUZMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA1MjUxNDMxNThaFw0x
OTA4MjMxNDMxNThaMBsxGTAXBgNVBAMTEHd3dy5jb250cmVyYS5jb20wggIiMA0G
CSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCajQsx3SlqJ3WVKNtzszfQPvKVamfk
41wpwCZ5WNWbqLtB9tyK4EEAdhLuptdPCW91TMUqFUW9yirzXUxqfmp0EoguANxi
npZkhBn/ObDtNC7wO7S76QzPpH/B/D5jM218UQYPJM6MjGGLSmtVQDEITUhQPQbM
DpOJdnxTRPOfmV8Bz7GWrCQS5Yy1DxE0GV/BeVuJRMzuwQrdI3nASu0jDWQ96Eq7
+e0pNuBGrtwm2c8M/L4xOXGBuK7khTyepm1CHacaIqUkoB9Mel8CIAhg9MFcOAnf
Fowr1U+zURE0xiB35J/ldQeFBLDO55bD7/7CcOWQoYkKOkoqP4Qu1p0jF+/Ohyds
lkHoX+HO/K3h6aSoId3k2uwdG+wxc0vRlSCK4uIVKMYtvoanh7s5v2/hkKnUE/Bi
Ix7NN6bfm45COlX94DYNa/MV0dWNvgl1+9tVX+dUb2IJCg/3NKn7SQzOzHUDxz/k
sidm+7w5gTTdtZASyspNPLIIB30JDfjD+5v6ez5Ox7C+A09tck8ugvj4Y6H1UU8n
caUOuGBrxQNkQC3SyBCNtb68f55qpA28yIbwGd+qNbCK/mBIbX8nARWDYaeOBkVw
d43BVsRALr4vN8bg6Bp7iaHOWu2IKJLlBC9IkDz1Q7nWi8y7SE9s3r0I01oyiSsT
vgUm5DVMKunh9wIDAQABo4ICZzCCAmMwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW
MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBQP
FIz7ibsTH8KQdzyxlPrwK4DRxTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv
86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu
dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu
dC14My5sZXRzZW5jcnlwdC5vcmcvMBsGA1UdEQQUMBKCEHd3dy5jb250cmVyYS5j
b20wTAYDVR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEF
BQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEGBgorBgEEAdZ5AgQC
BIH3BIH0APIAdwBvU3asMfAxGdiZAKRRFf93FRwR2QLBACkGjbIImjfZEwAAAWrv
nrw4AAAEAwBIMEYCIQCaaaaZdq93Og/9bzUneH6f1jikiJg6/nymrEO1bVGNHgIh
AK+D5iZX1fDHNH5l4LTJNsb9CTSpsPioqi3pDq51NR+4AHcAY/Lbzeg7zCzPC3KE
J1drM6SNYXePvXWmOLHHaFRL2I0AAAFq75664AAABAMASDBGAiEAyuvUOrBdnktr
0ty9lZWnPwmoydZ7MsX5asyICSf2KI8CIQDyKn62iqliqc5mDCA3gw6r1adB46sP
dwwJM8M+vqiNtTANBgkqhkiG9w0BAQsFAAOCAQEAQgjhM5CYZYT6lWj3/J7sF3p9
GObClIhN/3y5G4MQTYDBIBeuTYIBpXSVq/qhgSlpnLsCjkGaY1XQGmtaz8X/8tw9
mG6Bye2tQYTeN2kznxgMjmZNSWuYMdwaJOHbThB1skajqcn4VnpPtk+oLHR064eO
eAtzXphh0HbEWlpZm5QDt1X6uR+jAE5R9HHehucmwsiEYkWhsri3wqk+lBA5jmiF
CrzdGgdXsYbzR9xWCvgpyGZQvK74T+UTD2qX2wHquSlXSlKVQrtknqyRmeDL8Fnk
4EZIRmHYxPiMTb2so4GRxNmoXhOirQ9qih2245NFh+A2Qs/8/HGv1fDFP3e70A==
-----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 338730116912014817297514301399963375564057
 . . . . . . . . [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 2019-05-25 14:31:58 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-23 14:31:58 +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 630512874814345013752360088637797190277859768510342269373630525123411192690042280907115223487552966532835781124392993800719130567374262965982849757342575576726340076416880451799696615091257329968718704817047520607472609943750612439907525318615102880846035788941036831174665409309709179327059760390119943062265178871982434297530398655655141820706673683103314432496054824628023321603544278133993119311577155883297207769377714114546949123576944862143254446660440052322743951711116816701814633648372634519598655659848055145897496274978296877799736157827979700333500338490545758455419088227329989159473366843724717798198114178748214856543800756584832197208277094734664542334171200898563146668600222926902283004002342000494012719485176762712651714949587000310333871583169814202958363321382516558733108343547359645549200991876918706782935286748742587049731534661033440683543593611278181521099483969623522799936815458211791050964978781728211434930754134171862499813057342472018897850315725627709717906204894578667997855428344103189218463743401981534012084277076754885477375065020043272169825482846539927867930349925336088821131828783330779053140043966435878345144219180308426943499406799904872684987119166562520500814128195286276901742174711
 . . . . . . . . . . . . . . . . . . . . [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)
							0f148cfb89bb131fc290773cb194faf02b80d1c5
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f20077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016aef9ebc3800000403004830460221009a69a69976af773a0ffd6f3527787e9fd638a488983afe7ca6ac43b56d518d1e022100af83e62657d5f0c7347e65e0b4c936c6fd0934a9b0f8a8aa2de90eae75351fb800770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016aef9ebae00000040300483046022100caebd43ab05d9e4b6bd2dcbd9595a73f09a8c9d67b32c5f96acc880927f6288f022100f22a7eb68aa962a9ce660c2037830eabd5a741e3ab0f770c0933c33ebea88db5
 . . . . [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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