cottonwoodtexas.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:0a:19:69:a5:81:28:4a:cd:af:a4:30:2f:ca:c6:8e:cc:8f was issued on by Let's Encrypt.

With 7 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=cottonwoodtexas.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:0a:19:69:a5:81:28:4a:cd:af:a4:30:2f:ca:c6:8e:cc:8f
Serial Number (int): 264773460712385381027323400456654300302479
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b0:dc:14:72:ee:cd:ea:a8:c6:61:8c:16:3a:ff:78:6c:95:8a:6e:5e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 66:7f:b2:b4:77:a5:bc:dd:95:0c:92:69:e8:c2:7b:98:b9:0c:81:d6
Fingerprint (sha256): 33:9f:33:a8:fb:e9:87:d2:d4:7e:f2:8a:f0:9d:1b:ca:89:99:b1:1b:5e:99:5f:ef:1f:46:14:ac:70:98:c8:db

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 cottonwoodtexas.com

7

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cottonwoodtexas.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.cottonwoodtexas.com
cottonwoodtexas.com
cpanel.cottonwoodtexas.com
mail.cottonwoodtexas.com
webdisk.cottonwoodtexas.com
webmail.cottonwoodtexas.com
www.cottonwoodtexas.com

Other certificates including the domain name cottonwoodtexas.com

(limited to 100 certificates)
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
www3.cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com
cottonwoodtexas.com

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA+MG3H+0dUQj/LOpOcFFV
GgRlSc7PakojxOv9leo+ArSF37hhoTAA8prK2RbSvPzJki2SjQ4xsyygBKhxaRJH
edsL3dpa4DGamiW3o3a92m/G3XJmZMTvIdxoMBrYt/pvLDcZoSEnBk6Qxvb8zoSO
+aqMi1EmIfVl+yrgsKQ2qbRd04AB2jsLfOAcltusjsMdHMewKmL1o6BSkKMU7Vxe
0hOgV4CTSJ5m8+YH3xa/J+J0it/6UlFdEiFGN12LtQ9CPpK4sUtA5m0HO03+qn7+
D7p9e6jXJw4e1eyVuh2Woxvy+IeMjpCaQ/Rl6WwaouJB0naGRWzHfHSZFUNSBQ33
rwIDAQAB
-----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 264773460712385381027323400456654300302479
 . . . . . . . . [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 2019-11-05 12:51:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-03 12:51:26 +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 'cottonwoodtexas.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 31402624221502305981667913557533177133928839799519368698481921185093307011952251407736928812987092666233944681238689337184321135658455208852127195896157888865900597408255297999291433315803749809297910663926682779348046908330884273970457124367368189461914340100694195075816719766370085608178551417292877807651205186633190288437544461978318033186862404409670350619568690699659602507373102163701812862747377265139755051878021811034281904966964569960577339589511866633916894304423057915690514462992639856011214144034141687063092627225261233504141378990303727479146855272523684198880433230634073016972932880373001587914671
 . . . . . . . . . . . . . . . . . . . . [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)
							b0dc1472eecdeaa8c6618c163aff786c958a6e5e
 . . . . . . . . . . . . . . . . [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 (195 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.cottonwoodtexas.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.cottonwoodtexas.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)
							00f100770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e3bd5a1a70000040300483046022100fe251a725521a9b3ea4afbbb0fdb8b7fb4da8751c508b878b33d61d22fa94482022100a201310a1b4c7b55741f0a128808a11e1aa6401c9daaf60013d04c1e2fe7e34a0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016e3bd5a2ef0000040300473045022100812cfbb52b1b969dcad6089acebe658b0f4c6a50400b7aa2e29ff91b57fe6f9a02206af5a656402c99e4d6b9e033b4c4337a2c749792696e1a52aee0488849cb8b09
 . . . . [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)
		0092de016200827927e3f3fd3f22c016f3922e3eb9da0b26cb67bc10e3a80df823546f8506184d0c08dd4d5dd2b9689eca7a4b9a1c04803e871117a01f1cbf154658c323648c239598ebd1931b590af6710e68edda87e6aaf872d6b510f44541e1b964535c7daceeddda6c5ba83f711245d1fd0ef003fd5ffe58004b13634a423d7409c255591b7dfa3fcabcf78e1b156d107594ac1490596596632a5d9b5c9d94c72b51cbbef843ef78337244c75095d2808e27fcb9567a5f421171d8dc281df367d4fe7e077ed76fa53bc774ba7516635e678365ef359d071d9335baa463d7c5c8cdf8819ac6ca6d93672a6bc6876de13068f4d19d9c1cc422231ad0a63bd1f2