mastereclass.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:94:df:70:a6:d3:b3:33:35:48:96:a9:6c:02:c5:7f:4a:d0 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=mastereclass.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:94:df:70:a6:d3:b3:33:35:48:96:a9:6c:02:c5:7f:4a:d0
Serial Number (int): 311995650863540420893089417010936400530128
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 5c:e4:d9:0c:6c:65:86:d7:ac:c1:3f:f2:37:a6:da:43:8b:26:b2:b3
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 3b:dc:ae:e0:11:65:7c:ca:09:71:e2:fd:dc:92:4e:a7:0a:39:ff:75
Fingerprint (sha256): 73:96:63:d6:af:7e:9a:2e:5a:44:1e:05:9d:ea:db:9d:a1:2c:16:da:92:c7:08:9a:35:37:b4:46:03:34:84:f6

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 mastereclass.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mastereclass.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

mastereclass.com

Other certificates including the domain name mastereclass.com

(limited to 100 certificates)
mastereclass.com
mastereclass.com
www.mastereclass.com
www.mastereclass.com
pclighting.com
mastereclass.com
mastereclass.com

Certificate

The complete raw certificate details for mastereclass.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 311995650863540420893089417010936400530128
 . . . . . . . . [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 2019-12-29 08:28:13 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-28 08:28:13 +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 'mastereclass.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 770625810944862149389034925204421951132867295391132828869892634693368900215100962844719134452663725656516479091194171069530327644908710273580193791983126820678669914789378747177949547225223190721297196868808181982455258967653786721223377586278459835154822412708803667644827990550732209606021578062349605559149485700041361906143870888352496842150272465948592763526530838784500499989482185101052424912781755882353458976625410681561164313431697399482725575671907435773394964427615519742641461918888958829528599851484221727084980506446983339461078219698505695441081920567524687947431446122073720596837819169959153629029935488421427109767234052947801455550455881468214522061875355313121574599118836874292667693455031562776557969506628005571211812682232513050989424070895994817540309994606877087519400193182366866502979484644666315394362599272792041119927114134673504564298846954962265373185744253754170470756035778366226645452768459951791043395933914183196306733430346388609512393242813447692483704324326411585851395941835376096848620517680821929974962524938762129807643861151279307750259818459828063273509470436170288020984009628800654850608282381611668561324303753212084934863696656273081941454731930192302173902484013577400579931925323
 . . . . . . . . . . . . . . . . . . . . [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)
							5ce4d90c6c6586d7acc13ff237a6da438b26b2b3
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mastereclass.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f50fc0d5100000403004730450220616ba195c0633307a4787bddfc593aefa240d6034b8bcdb8db4e5d12ee28817e022100fb899250b88b83e6f99d397d02b3fb4ad4407bb188f020c7f467c70b5e2eecd300750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f50fc0d93000004030046304402201c62b6ab62e4a729f7fb7bbfe0acf786c0f0e3e9aadde18ce34943dee43cbb6f022008c18886a8b4b77f679b5497abb7792e4b28b0d2399ba5561f04c41e96eceeee
 . . . . [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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