contrera.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:7a:10:7f:07:fa:c9:f1:d7:fd:a5:9c:5d:1f:36:31:f4:8b 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): 04:7a:10:7f:07:fa:c9:f1:d7:fd:a5:9c:5d:1f:36:31:f4:8b
Serial Number (int): 389985519722875478418314732836389695648907
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ab:3d:a6:d5:c1:f3:9b:3a:c3:60:92:e2:48:ee:56:51:d5:97:44:29
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f6:9a:42:6a:7a:0a:94:1a:ca:58:ed:58:39:25:dc:9e:13:4a:c2:a9
Fingerprint (sha256): 6d:27:b2:39:84:a3:9b:b5:2e:78:d0:ad:12:f6:39:4e:40:65:85:ce:ea:f6:c4:fb:4d:70:df:7e:1d:a0:6a:00

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 389985519722875478418314732836389695648907
 . . . . . . . . [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 2019-11-30 17:37:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-28 17:37:37 +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 802005545386089283243815564497471836320762769112179005835275763983186955589991168804652649198233706655611698187725866866012026589238459877556592861363054151782879225257344443241079500707024441649136135230699106718613096740111860908421322720844820848258711008227517183871798885002782097900170448327426547851854044674800094294122209230266184345703070583790313999794331817560339893685402484093312514313484677594247075746291524482831513628004799728350788117520196516307340945402505366725979985129378631107894725989027543023647513161434955832110354193660185860407702915335568295340494145148197034395881642475178471715461989497179769649084797617245092933629630808362404681082181120839314082064550466356861251904057400394961518603709293744418199506589755466140462460025436495184118586777129029446475213821368206314437167780095872883682516316694181209138985809218715217472755670402349225540161971847184003255431888246188137987939354779641721226183940353432538162249726277397568673473307410290854734412036194398395796237685072340458337166304269896054737153686737338479768542314312267907877781202618970001484579240220612472711935057488149760100969085216123872421005551844829271330169294836066462603792269182619879767478439683261963645258176569
 . . . . . . . . . . . . . . . . . . . . [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)
							ab3da6d5c1f39b3ac36092e248ee5651d5974429
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016ebd9aa0110000040300473045022100cdcfd7d4092159ce9505185581417fc6930af5df7f0ff65828b1df3a5b5beae202201389994e020e6018021df4bda7cd0c5a9004bdc960fb3318dc3588234d2370e8007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ebd9aa003000004030047304502206d086e11a2a3b778973ac5f5718f806aea09896a9521437304ab9966cb8ec35002210090d49595dfa951d68eb5623c60e45ee99b10159d92c89f29ccfdc8a51c02997b
 . . . . [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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