poisonoakcure.org

Issued by R3

About this certificate

This digital certificate with serial number 03:f7:74:58:05:08:d6:d3:eb:b4:f0:7c:e9:f1:d3:a6:66:d7 was issued on by Let's Encrypt.

With 13 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=poisonoakcure.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:f7:74:58:05:08:d6:d3:eb:b4:f0:7c:e9:f1:d3:a6:66:d7
Serial Number (int): 345541249896499501028329418588187206772439
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 13:eb:76:e2:36:80:1c:55:13:db:32:2f:98:de:5e:ad:93:e5:a5:c5
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): bf:2d:af:c3:c6:89:8a:30:95:a0:a0:9c:1e:54:77:e2:f6:3c:a0:6f
Fingerprint (sha256): b7:0c:0a:86:97:36:99:7e:75:34:67:36:5f:6e:d0:0a:1f:b3:e3:57:c2:e9:e8:55:5a:07:c6:82:a3:ae:37:e1

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate poisonoakcure.org

13

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for poisonoakcure.org

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

absolutecourtreporting.com.sahealthandfitness.com
autoshipping.net
danielashealthyrecipes.com
emat.in
fatcarbs.com
funnyebooks.com.milesofsmiles.com
hybridredoxflows.com.pyramidarc.net.debbiehenline.com
jeddah.biz
laentertainmentlawyer.co
mjnaz.com
poisonoakcure.org
romelda.com
tankcares.com

Other certificates including the domain name poisonoakcure.org

(limited to 100 certificates)
poisonoakcure.org
poisonoakcure.org
sexerencontres.be
fmcap.vc
www.wantirna.com
www.isthispoisonivy.org
poisonoakcure.org
poisonoakcure.org
poisonoakcure.org
stratagene.me

Certificate

The complete raw certificate details for poisonoakcure.org in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGFDCCBPygAwIBAgISA/d0WAUI1tPrtPB86fHTpmbXMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yMzA5MTkxMDE3MDJaFw0yMzEyMTgxMDE3MDFaMBwxGjAYBgNVBAMT
EXBvaXNvbm9ha2N1cmUub3JnMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKC
AQEAxj5Pw36zFx/fu+JCQ1XqzjpB+dntkd0JS7K4/GwJHVUw2snTfh+0Qrbgw/bP
fdgSv1D3Aj7X/pNdXXylsMj7pTHlguOQ2LVpdCHVjZt1Rag+A8foo9Tgiq/wsn/L
A6YBgOcL2+iA9U7P5PSe5zRLu6BQy7eYFgt20e6fjVkKfPIR28MP0izy1TS0zCP6
bHhhPvwIBJasq6ER3Fetm+FVJFIYUHPsPtUxcGHRXZKlaivcyDD5ieI8XaPRr9sV
JdEeWw4DSPyrHFBtsGVsffax1v0pFL8WBSrSgEhWAZhHRo2jPLyRoQcjkvpbE9dw
Lq5KocBYLUxlNB9cqPkrnR6bZQIDAQABo4IDODCCAzQwDgYDVR0PAQH/BAQDAgWg
MB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0G
A1UdDgQWBBQT63biNoAcVRPbMi+Y3l6tk+WlxTAfBgNVHSMEGDAWgBQULrMXt1hW
y65QCUDmH6+dixTCxjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGGFWh0dHA6
Ly9yMy5vLmxlbmNyLm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmkubGVuY3Iu
b3JnLzCCAT8GA1UdEQSCATYwggEygjFhYnNvbHV0ZWNvdXJ0cmVwb3J0aW5nLmNv
bS5zYWhlYWx0aGFuZGZpdG5lc3MuY29tghBhdXRvc2hpcHBpbmcubmV0ghpkYW5p
ZWxhc2hlYWx0aHlyZWNpcGVzLmNvbYIHZW1hdC5pboIMZmF0Y2FyYnMuY29tgiFm
dW5ueWVib29rcy5jb20ubWlsZXNvZnNtaWxlcy5jb22CNWh5YnJpZHJlZG94Zmxv
d3MuY29tLnB5cmFtaWRhcmMubmV0LmRlYmJpZWhlbmxpbmUuY29tggpqZWRkYWgu
Yml6ghhsYWVudGVydGFpbm1lbnRsYXd5ZXIuY2+CCW1qbmF6LmNvbYIRcG9pc29u
b2FrY3VyZS5vcmeCC3JvbWVsZGEuY29tgg10YW5rY2FyZXMuY29tMBMGA1UdIAQM
MAowCAYGZ4EMAQIBMIIBBAYKKwYBBAHWeQIEAgSB9QSB8gDwAHYAtz77JN+cTbp1
8jnFulj0bF38Qs96nzXEnh0JgSXttJkAAAGKrShsuwAABAMARzBFAiEAozKqwudK
bdkKJlYeoTEvInlLwS/vb3o6P/OI5mzyDDoCIF4cD1/nmoBChlIlNEeXfNSdGlYI
Gb/XLG0hnUK7R/3DAHYArfe++nz/EMiLnT2cHj4YarRnKV3PsQwkyoWGNOvcgooA
AAGKrShtGQAABAMARzBFAiEAmN0E8jQlkI9fgXTCPibOcQRQCnk0n0Am1dwIHWnZ
meUCIFsV0LrspNLcNNo2bAojpkkurR7mswLiAOAsmCVhX1ZZMA0GCSqGSIb3DQEB
CwUAA4IBAQALU+xJ2/ACWXk6uZylTCRxMIzyaqVCg2/OdJ5aJLaGK7zWEz+lepUn
zH5tTZJGC8JkSMZhfQ5ngc5Hj2lqEOugmnIqs1g1LhN7zDFrE37WWC7tIo7i5frN
EGm6y6406zUWYvlT2pZZ78W668aJYl/RmgAkipmrxlTSgLEAUZP23UN/JeJct+Ia
cH12/InqHfBcgaNmf36ytV5g9DnOT3e359iq94wuC/uE3gbdM4zqgH9mXfZaVPSG
/E73hrViTzf5lVoK2J5IEkLsDo4nHpijHf5W5mmIU3Y91WM8FiAoAHOdUOeWKMhy
7Cvc8hki9YY4PS5SAkLl1GAWf2INaLS8
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxj5Pw36zFx/fu+JCQ1Xq
zjpB+dntkd0JS7K4/GwJHVUw2snTfh+0Qrbgw/bPfdgSv1D3Aj7X/pNdXXylsMj7
pTHlguOQ2LVpdCHVjZt1Rag+A8foo9Tgiq/wsn/LA6YBgOcL2+iA9U7P5PSe5zRL
u6BQy7eYFgt20e6fjVkKfPIR28MP0izy1TS0zCP6bHhhPvwIBJasq6ER3Fetm+FV
JFIYUHPsPtUxcGHRXZKlaivcyDD5ieI8XaPRr9sVJdEeWw4DSPyrHFBtsGVsffax
1v0pFL8WBSrSgEhWAZhHRo2jPLyRoQcjkvpbE9dwLq5KocBYLUxlNB9cqPkrnR6b
ZQIDAQAB
-----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 345541249896499501028329418588187206772439
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-09-19 10:17:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-18 10:17:01 +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 'poisonoakcure.org'
 . . . . . . . . [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 25025911366993164786194829176395233269433410281277482370841573735707467662834217523221580548218665626547552280673274989105204548007811345380039480721491771682333824121266749677105543460677720760374285992656488076880039595006215102148959914816372106510518756712081413186881668982561466211809190147479035390571592524325355126566334887641652447725666101872503333082915913809892165737458145043423712466905262076839218707399638876904390567192339761885523263262206429494727247128445303204031867210235840736148477188267385733390946220780082757257960993701273707888835361098357692841994288549597193357762757020724622952143717
 . . . . . . . . . . . . . . . . . . . . [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)
							13eb76e236801c5513db322f98de5ead93e5a5c5
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (310 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'absolutecourtreporting.com.sahealthandfitness.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autoshipping.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'danielashealthyrecipes.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'emat.in'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'fatcarbs.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'funnyebooks.com.milesofsmiles.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'hybridredoxflows.com.pyramidarc.net.debbiehenline.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'jeddah.biz'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'laentertainmentlawyer.co'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mjnaz.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'poisonoakcure.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'romelda.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tankcares.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018aad286cbb0000040300473045022100a332aac2e74a6dd90a26561ea1312f22794bc12fef6f7a3a3ff388e66cf20c3a02205e1c0f5fe79a80428652253447977cd49d1a560819bfd72c6d219d42bb47fdc3007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018aad286d19000004030047304502210098dd04f23425908f5f8174c23e26ce7104500a79349f4026d5dc081d69d999e502205b15d0baeca4d2dc34da366c0a23a6492ead1ee6b302e200e02c9825615f5659
 . . . . [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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