*.sg-course.com

Issued by R3

About this certificate

This digital certificate with serial number 04:76:67:bd:2f:7f:8b:bd:80:29:20:ee:7f:94:03:c1:8c:8f was issued on by Let's Encrypt.

With 8 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=*.sg-course.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:76:67:bd:2f:7f:8b:bd:80:29:20:ee:7f:94:03:c1:8c:8f
Serial Number (int): 388740355814762310212011440296126096444559
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: d0:d7:d3:8e:8b:ac:de:4d:56:f5:f8:39:7b:c6:59:53:6f:b3:d6:b2
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 01:e6:f6:1b:36:dc:72:7b:d8:89:21:b9:3e:fe:8d:92:bb:8f:2a:4e
Fingerprint (sha256): 0c:3f:f4:63:f7:f9:4b:72:8f:28:a0:4a:b5:b1:e6:5f:73:65:c7:31:51:e9:7e:56:09:d7:7f:f4:74:33:26:c5

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

Revocation information

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

Check the revocation status for certificate *.sg-course.com

8

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for *.sg-course.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

*.ccisg.net
*.cet-course.com
*.sg-course.com
ccisg.net
cet-course.com
sg-course.com
www.fac.sg-course.com
www.fcc.sg-course.com

Other certificates including the domain name sg-course.com

(limited to 100 certificates)
*.sg-course.com
www.skillapac.com
www.skillapac.com
cet-course.com
cet-course.com
www.cpt-corporation.com
cciccourse.com
cciccourse.com

Certificate

The complete raw certificate details for *.sg-course.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1iSNZve3IhQ8VKdqVnkT
KOBgd8SKDM55BwDUsLjslfBt3ni+XqbtyLhEzOPqQdoTkMzdb/i0rF/8xW+TtxeO
/+jbhc1PrsEAkwBIqlSi8GD0lfuE7fQEAZ9SyfVO/tGZYijSVJabXd0/7T0T6U/R
FCBDgzQ2oLzwbKauSeor4Fmim90FkEiZMeq81FG6eVw3q33wi0411koeij9FuV8R
wKqemFagzqvE2HSdZLOBNIC1C6S497blS74/DNxwVyOlsVycCL56dQwMxWZ/0QzW
Ecjt/jBwvjXkc2xbnnm4MbXUL9Mz7yD48nemAbDLhPdLIguXGxI+Pn5DttL3EuFq
dQIDAQAB
-----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 388740355814762310212011440296126096444559
 . . . . . . . . [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 2024-04-04 00:33:24 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-03 00:33:23 +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:12|false] UTF8String '*.sg-course.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 27033021899498053284873736356877851488884452189229509366104395780095305609569297061693554807278652206612006366453154622715082627022032543001225521500830290200071151277327844217661866423301018848148949654255308225145417754429713056788533742622096997016135333955605476269629582750129106641522964894509285384413672135059969355813252120663929073015035182658056533578127570587878768433659917055136673337157375279003216066736387354703273796928637243830572729211305294673268242069446646963544873174728892372919992046294656700523200705362843597634136095813720697069647463634148309558043254163529290087851342663474614829673077
 . . . . . . . . . . . . . . . . . . . . [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)
							d0d7d38e8bacde4d56f5f8397bc659536fb3d6b2
 . . . . . . . . . . . . . . . . [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 (139 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.ccisg.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.cet-course.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.sg-course.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ccisg.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cet-course.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sg-course.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.fac.sg-course.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.fcc.sg-course.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)
							00f00077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018ea6bd42d60000040300483046022100d2efd716d51e8c8f3bdf00a724144e0d4595c2ae72ae2a2dcd1e8197700b0305022100ca0f4c87d18ee35b04a3765e3b46f5a7b00312b66605b34de7608f61a805191500750048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018ea6bd430a000004030046304402205f24afe0b41406d32a6dc7f75ee307517eb576e0e6db11d14299f3ac368529ec02206260315f851c681a7f6dcad83fbc74582eca0788fafe6a6c773062bd5234d950
 . . . . [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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