knowmebest.com

Issued by R3

About this certificate

This digital certificate with serial number 04:e0:5c:05:bd:f0:68:62:3c:fd:b5:1c:86:b0:92:21:dd:16 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:
  • 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=knowmebest.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:e0:5c:05:bd:f0:68:62:3c:fd:b5:1c:86:b0:92:21:dd:16
Serial Number (int): 424794712706850186634099761922902071565590
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 16:fc:3d:6c:3c:cf:a2:47:9d:32:6f:42:af:d0:68:4c:88:f2:90:06
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 19:18:d3:8a:a9:85:a7:c9:33:fe:16:c9:c8:41:77:3c:04:83:ae:f5
Fingerprint (sha256): 24:41:23:ff:5f:b2:d3:cd:3d:36:c3:c0:40:f4:74:76:af:bf:a3:7b:c3:e0:4f:67:93:37:0c:4c:ea:0b:e9:d8

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

Revocation information

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

Check the revocation status for certificate knowmebest.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for knowmebest.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

knowmebest.com

Other certificates including the domain name knowmebest.com

(limited to 100 certificates)

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuW5PfE7ReL7DOwdO+SNe
huUUlTvUqG4dJPwMJ+PTuWRmmjTQ1+B3xlojb2lV/YE1mm7S5GFsSMB2f16PeHHD
carwMLjumDkGuQTXJ2Qjp1E+l7M1rn/qXl4Two257E4Bh+4tuSFvwV2S/bxLZxID
zpaeZIQqe0zf610bnOn2plKgeCfl7ywKZCasx2sGqWz3+s5O1Kgp5UfSOYum031M
1I96DWLccZf0HmUyuNoXfYgGcqprgKcUcfUPTKtaNtoibAGPPhsHYFA9Lk3BuqOR
uEXRAAW81WgiPFX+OYz/+jrDIaeJgivoWwjhjRY2oj1BdTRWFbZsgwUS6jNDpSwN
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 424794712706850186634099761922902071565590
 . . . . . . . . [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 2023-12-22 03:30:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-21 03:30:50 +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 'knowmebest.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 23408482548976561820857386177537642943853830536199387470518505653419757506941682097722925277718161615923511272035484078395520612420065849682322660836987273946825589638761411430982742672580151273463183879033031335984598263881143664686444643473614627549779845574724847214455315153111525133771846244998296107629507385628542537043562003162520965585435420141018627053119094068338883076041118902711343724523038823814471364291162649561143840441534814942427099775177806841742697454196782941744044102919652798757602238536351491766989967605328975168282608494292636249427018663427497623930899805418176262970564561909302384397639
 . . . . . . . . . . . . . . . . . . . . [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)
							16fc3d6c3ccfa2479d326f42afd0684c88f29006
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'knowmebest.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)
							00f00077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c8fca57dc0000040300483046022100f6f89312c3b6c58c8f9e90fe16a7db105e175934fd47e724a5510605ccebfa79022100dc97c21df538d272abbb54738d625abf17e019cd767f60df243d54c563c31ec3007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018c8fca59e0000004030046304402204d318bec9cf09da40178ff9be51aa96e1678d7fd1c606954cd71124e7542b492022044c8dc654b5044076158a0d2038053534725a7ac6f5ee9a70fa8d6f703c646e2
 . . . . [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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