usepatricinha.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:a3:74:da:05:26:00:93:79:15:6e:bd:2a:d4:42:ff:20:19 was issued on by Let's Encrypt.

With 9 subject alternative names this certificate can be used to secure multiple fqdn's. 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=usepatricinha.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:a3:74:da:05:26:00:93:79:15:6e:bd:2a:d4:42:ff:20:19
Serial Number (int): 404070492007803063442403106221461652578329
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ca:f0:6b:fd:c3:64:65:fb:2f:e5:86:14:32:11:67:81:e4:1e:5d:05
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e3:7b:3a:24:0d:fc:77:e5:4f:f2:53:03:6c:a8:f5:74:ac:4a:66:7f
Fingerprint (sha256): 05:2a:76:8d:3d:c9:8c:10:38:0c:d2:45:46:79:ef:ef:0b:73:3f:2f:0f:e8:60:b5:00:7e:e4:9d:b4:95:67:b3

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 usepatricinha.com

9

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for usepatricinha.com

Public Key Algorithm

RSA

Key Size

2048

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

autodiscover.usepatricinha.com
cpanel.usepatricinha.com
mail.usepatricinha.com
usepatricinha-com.omegawb.com.br
usepatricinha.com
webdisk.usepatricinha.com
webmail.usepatricinha.com
www.usepatricinha-com.omegawb.com.br
www.usepatricinha.com

Other certificates including the domain name usepatricinha.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for usepatricinha.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoOWW6SGWkBujyQW/IjWp
Hzhpa/IgaH+JBsIo9qucxRWmrZsnMxhh4RkzzlvsT9r+4eTOVAr25idntU6r8oMn
UdHZjWEzMBCSmaUliO6GpWDgaV6Y3bsuMJCCk4f5d240L8fbsAvghnxGrOlX9rFD
SoFWinxSvb/B5WkzYaWz0E2w/ICXrzXr/UGRswZ7g3sGpk3ba/erVmF1CcwHqXx1
E8O7QaDu6QW5uX2XS1f/NCh5MIYP9Ij64hxxxa6CZvIaUFBBWHk6UjP7hGF/u4AW
AHgXVIgxtVOMBrBXcjYSqaBTHxO22fILEGYoOxXRFzf8e78D315LcJQ+cQbl09JV
PQIDAQAB
-----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 404070492007803063442403106221461652578329
 . . . . . . . . [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 2020-02-10 03:13:25 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-10 03:13:25 +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 'usepatricinha.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 20311343594028551907679097524802228661566048406611947604527320126010216499495840048076921510976716590467960034949458981778665243214791274139357422506202289811845081983775020629232017576624767028305566055105902300817819464726879439449344704702083579083256707170232472616806145173341707314499358126496768947353811319826568021881732943984734652305929432379277283165566303419132709392795398617381823355655830200712447646862151809228966001293593155569365436199355441414616595806375115824825724752228263370311818989323439022430755914133873325477338211042541050946378158003154239400374519776246787364100533277277692911310141
 . . . . . . . . . . . . . . . . . . . . [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)
							caf06bfdc36465fb2fe5861432116781e41e5d05
 . . . . . . . . . . . . . . . . [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 (253 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'usepatricinha-com.omegawb.com.br'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.usepatricinha.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.usepatricinha-com.omegawb.com.br'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.usepatricinha.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)
							00f00077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d913000001702d4d4d450000040300483046022100edefce5d94cd73d695c8fb010486871467564b16823700fec6489647dad6d768022100f4464446c1502a6250ba85ad40c7cc2a207960ef870fdc0b09c7f1ae73f071eb00750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c000001702d4d4d44000004030046304402202f138817ff16063be90b0b790e302d90d852e65a6f9fb7d2f8e78ff7867fc16202204e0001561ecef89de18bd1f08abdf11da26388594b637ecc36091ee37c76fe1b
 . . . . [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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