www.contrera.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:81:4f:8a:89:8b:c5:8c:c2:92:37:49:70:2e:0a:fe:56:c7 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): 03:81:4f:8a:89:8b:c5:8c:c2:92:37:49:70:2e:0a:fe:56:c7
Serial Number (int): 305339011466479256891966609015612148438727
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: a2:7d:be:91:d3:88:bc:57:10:bb:31:43:83:dc:a4:22:dd:2d:a3:05
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): ae:58:0c:d3:7e:19:9d:11:12:d7:86:d8:a8:ec:2f:2f:fc:53:22:33
Fingerprint (sha256): 97:4f:42:f0:7d:d1:04:09:b8:b7:fc:5a:06:0d:bb:d4:1b:aa:25:ba:cf:6d:b1:c8:bc:00:9a:23:6e:28:dc:e0

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 305339011466479256891966609015612148438727
 . . . . . . . . [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 2019-09-28 18:56:28 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-27 18:56:28 +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 696148855642791301461883986177955240808143170515986152155195072446827059885184488361756567594352396668513293185496096918281358610906257175820665526680549134980825548231127802740253339560371800906211262132010860711848829930324403932229363078440502259683192270820695461984860161202209315773189013703452701906670576249222338891186841399838070729074199135793233733511809099025282759414352294323945457899898949989292144946898511128225754040669645594166588073298683191843949043615337164689834654278906772701219785411786284653453077015980966193585675693685815145336943523155158748997367679616423353041355842629153444363285794162237763178203070572046978246769580387621533494007791215821366508877574035450110682552511154156180639340206683027156680196670646977222116116328241139298591468089329618809066341371653906367440164856063880351392522284845322389713783650085757913754967882896200336558965568462012877482247068097166582252554567859530313213976220941460891015652120581670697470580380881774113407537161708357899362057275152190465129445521560479759239078720326545905072058027700134266258881686982190971524924094786579588163587088884553332575358077801657650403424697687027271945840230118805315242103317128273472277935007997135536397789624617
 . . . . . . . . . . . . . . . . . . . . [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)
							a27dbe91d388bc5710bb314383dca422dd2da305
 . . . . . . . . . . . . . . . . [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)
							00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016d79722d140000040300483046022100eb12ec65353989cc33a023c81a01832d8974b41b3dc0984860ccad80be1a5fac02210084521f1737495007e495460691f2ec4ea3933745ee123144b85a9ad73148c52c007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016d79722d0000000403004730450220501fd84a91a0a29528b3d70801ee3baf52f395d44f9280d0f2f89065919cb8b7022100fc7f665f62f9acf2522393f5770e62e7162ed3af7680af41f749c5a6e0604bf2
 . . . . [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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