contrera.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:4f:c6:cf:ca:94:76:0a:3d:fd:82:1d:47:15:b1:cf:66:a7 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=contrera.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:4f:c6:cf:ca:94:76:0a:3d:fd:82:1d:47:15:b1:cf:66:a7
Serial Number (int): 288483430839459048208538772004828500420263
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 15:60:2f:fb:f6:7c:d1:68:06:7d:1f:0f:a1:ff:1c:fe:cb:2d:e3:9d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f6:95:d3:44:3d:f0:8a:b8:95:7c:3c:b2:65:7c:6a:20:49:56:a2:d8
Fingerprint (sha256): 24:90:d3:cd:54:a8:38:51:7b:5c:7e:f7:bb:75:b4:9d:89:bd:e9:12:65:99:45:d0:b7:82:7a:b1:44:26:eb:97

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 contrera.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 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

contrera.com

Other certificates including the domain name contrera.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for 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 288483430839459048208538772004828500420263
 . . . . . . . . [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 2020-02-09 22:58:22 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-09 22:58:22 +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 '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 1004691795531805767005576967043097362308968776774762041981859683529470840090165007386726821154541726327978900561889555380629988135553913796542030196492146836373308681530563094125083117708654990395989620141110611044347509582745171079087522628533392811175057184911864297090985758253452060144727409622299557233298512431431043332593447993991684392634032571801820446094308832653187226652022051308704555540907052740447384701143537999732854103639949624964038779715402995434514833785380037336196843161677299831965118019077278544364693655729379861671813104530820789328682244350491967971907835164304376059703594213315988416198939193725470446070627254933179620577379094540138255494029129040720171591685268093797556719904274996553158019098898358282527387382868042712261677129771014769458119418695774051599840975859730943547094787511509521314367528957143453886154096902583617785922165885340963706913887527167001553595743802158446920534815736027844713752890456020165490555357338880431386663517782776717086232350932933080811907120994552326416310124467869682033801027419317719361459779172620873548829369972624653056483712882194809427299927906847126173767626177640885445286370262567390185294807843684402576791512815926348885636885014208236651644043421
 . . . . . . . . . . . . . . . . . . . . [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)
							15602ffbf67cd168067d1f0fa1ff1cfecb2de39d
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb273000001702c63cc970000040300463044022041e18998931c5648eba4122a65d7a480caf4fa9a6ebe86fb0e3a04ddb1abf0440220235132fb11840062af26b7fe3c6f64c76aeb098e2a81c4bf2589f926016fdf69007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e000001702c63cc830000040300473045022100b6a0ccf9bed3438e1b35d9fa29881fa2c12a57dfe85fcaa21b65d45dcbb2b8e1022069884281d42d8b70d0e0466221fa7ef873bb09e55bac087dff22e321382c73af
 . . . . [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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