masterschool.org

Issued by R3

About this certificate

This digital certificate with serial number 04:a5:66:23:c1:2f:70:87:d9:bd:5e:fe:e4:0f:cd:ab:fb:55 was issued on by Let's Encrypt.

With 2 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=masterschool.org

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:a5:66:23:c1:2f:70:87:d9:bd:5e:fe:e4:0f:cd:ab:fb:55
Serial Number (int): 404731501173219546893230856007128638552917
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: f2:8c:cc:b0:16:b9:cb:cb:60:9b:25:01:0e:c2:78:43:52:ab:2a:3d
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 4d:43:c5:3e:c0:2e:47:92:7e:3b:68:27:c8:e6:e6:b8:9c:86:07:21
Fingerprint (sha256): 4b:65:cc:8e:b7:ef:24:cf:98:db:32:6f:25:38:c1:88:61:7a:e7:d2:8d:32:e5:5f:a8:d9:bc:94:0a:c0:c4:3c

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

Revocation information

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

Check the revocation status for certificate masterschool.org

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for masterschool.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

masterschool.org
www.masterschool.org

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mail.masterschool.org
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academyofthecanyons.net
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*.masterschool.org
TMS-ADFS.masterschool.org
academyofthecanyons.net
samuelgompersms.net
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web.euroamericano.edu.mx
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www.grandville.k12.mi.us
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academyofthecanyons.net
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athletics.rsu14.org
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icabh.org
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mail.masterschool.org
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bcsdk12.org
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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1/E9xqiudQn0F21iRr8k
U3ZRZ/j6DTPmuCPZ40omEB8P5mNPRp33exqJK95p3K0rDPrlN34hKMhZrmXLq+v2
VSKcTC1a7UIeViwUorchnbTFPQXIQyfOv/a2liRjO8viwruA6bU0CZiTsI0J5cio
OnwXY7uo1w0Byz6FtvFxXbNQ0mAjEhO64iQe30XLxH6Wlow+0fIphiQXwCu9MyU+
BZjG5S3ytJHrg1cEi3UUrSGBMzn4jhsDXfJQ6qki2/Zf1Zo0SynbHYy/3c82hLuX
q8HyYgcDT8X1+9U2X/47muaYPNokKJILsIUtU7QjBwvZRSATCDlBwmtl2axyFoFC
AwIDAQAB
-----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 404731501173219546893230856007128638552917
 . . . . . . . . [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 2023-12-07 02:08:36 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-06 02:08:35 +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 'masterschool.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 27260196092637746295002467602848183660902256399368290009666600915406747978519520098342351515289205908647483970656842949505188273915358636515969308688801733065809159423114826421640705811892421516655747993862152550706394819573433072290550103223514652970104895696917156205270683585453996639506355854099971165501919593256121140000279686913745363655549680194315605398394659062229380431808119216233874291901401928211473645755246717805035842775277369453428451147008507139153808199964571368882821973466881188831592884629040317536753917106690038025961655279046491485304569356375864225461716358916103257179048574476061084041731
 . . . . . . . . . . . . . . . . . . . . [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)
							f28cccb016b9cbcb609b25010ec2784352ab2a3d
 . . . . . . . . . . . . . . . . [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 (42 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'masterschool.org'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.masterschool.org'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c423fa6910000040300483046022100b49b7fe9cac190d48cc2d5e854d15262c5853636f07cf7ac1ba034025673f9dc022100c358981b9551f0e6225e45743508f0554168d10eab0dd568914474d7544af473007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018c423fa68600000403004730450221009576d53ae8ef612a8ab2eb2387eba602c6e86fffce6c83ce939efe43336556dd02205df2ea976f7201b091a285000a4ff40ca5a0a46be0a33324388d3db739ca489f
 . . . . [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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