masterschool.org

Issued by R3

About this certificate

This digital certificate with serial number 04:e1:6d:15:a2:26:ae:c4:68:c2:30:e3:c4:5d:af:b9:40:21 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:e1:6d:15:a2:26:ae:c4:68:c2:30:e3:c4:5d:af:b9:40:21
Serial Number (int): 425157674462841839730272116253540648304673
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 04:c4:ce:9a:8a:62:f8:62:f0:70:d8:85:7d:7f:14:8b:66:d2:09:bb
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): ff:6b:2a:a3:8d:20:99:94:2e:4e:3d:43:1f:d6:d8:28:10:d2:ce:ba
Fingerprint (sha256): ee:9c:17:bf:22:90:3e:ee:17:37:1a:30:4a:89:74:e5:4e:42:8e:91:80:51:a5:11:55:55:43:f4:0d:9f:58:dd

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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www.grandville.k12.mi.us
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www.grandville.k12.mi.us
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mail.masterschool.org
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academyofthecanyons.net
masterschool.org
*.masterschool.org
TMS-ADFS.masterschool.org
academyofthecanyons.net
samuelgompersms.net
admin.masterschool.org
web.euroamericano.edu.mx
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www.masterschool.org
www.grandville.k12.mi.us
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*.masterschool.org
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
finalsite.org
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www.masterschool.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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuCSlZdDZlb+xY42GHZqH
X0Z5fHjAFizXqTkvG3iZjTj+6n7rfB4CiQe2u05/GWEdSneB0WJQ59ep5gx2lQ6C
cMIhCRSpImYY3iXxQ3agMg+SVUzii3/jKbuSDJ2zEU8ZbtSwHU4WEW+LEde4h1po
bJEzihunpy73hz9xmXCtnX9GknNRGc86o5PDgckgH9IHMdasdUwHopkselTA+w8G
MkBVy1yXv7GtFSU4stC4LFpdiwfGeMF+enWdQco3q3iEfVvM1NQnfq9SNhnMthVE
z4rCn9S11wleOjepKJvYRgA2P9KFaPt/prM1QQnorPWGmPQyJ1YP3o+d8nIDxBNR
FQIDAQAB
-----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 425157674462841839730272116253540648304673
 . . . . . . . . [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 2023-10-08 02:07:01 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-06 02:07:00 +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 23245918971697577158268704889518032264796251281509726878593103067054526811122621399885238920281977876265089697072027378098568192217487631083542061198789010674153967272538520414482636765801811668244935507917404619382984708902208126303550207643192818046564503465121614545185183277437674375570236738381394659945581853667489989980041365283293727329276539518990529647461329015748616024074847226796644534578516867779478768573914531079928367062639331370764618625604678321733672669821536487544435087302293682234101365917432422957942109555003623181700225920288163264004964917251777353678289855096822960726364562855883841949973
 . . . . . . . . . . . . . . . . . . . . [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)
							04c4ce9a8a62f862f070d8857d7f148b66d209bb
 . . . . . . . . . . . . . . . . [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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f20077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b0d40a27e0000040300483046022100c1463aebe8c8cb10d8c562075d7aaeada11047430f63db854a8b0250ef0029820221009cd5b4f7aa8b8e63ac2e5d0d4e2a81d34369f2849a54b5bb1a41d0fef8e183f200770076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b0d40a31d00000403004830460221009cd24d3d6b78f24153cf0bf0ca71af5dcd4efa88b0b45c5f32266b4a1f8ca498022100c9d634c1d249a96410a32a647f90cfc5ce43abde91fb7290f4af7b351fbbdcc0
 . . . . [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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