clf.clf.academy

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:10:5d:36:36:4a:c5:75:42:f0:f6:5d:84:fd:a9:af:ba:81 was issued on by Let's Encrypt.

With 4 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=clf.clf.academy

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:10:5d:36:36:4a:c5:75:42:f0:f6:5d:84:fd:a9:af:ba:81
Serial Number (int): 354017561286588472989404209136290883418753
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 7e:c1:34:72:c5:00:8d:f2:95:24:22:90:6a:31:a9:19:4c:15:a4:d8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c3:0a:38:91:d7:4f:4a:93:ca:91:f3:1e:28:ea:ab:1f:97:62:49:09
Fingerprint (sha256): 8c:6b:c9:7c:81:f6:0d:4f:8f:81:bf:1a:37:0b:a7:7c:d3:a7:8b:a8:b6:09:e2:2b:15:62:19:ee:a0:f3:74:c1

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 clf.clf.academy

4

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for clf.clf.academy

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

clf.clf.academy
clf.uk
www.clf.clf.academy
www.clf.uk

Other certificates including the domain name clf.academy

(limited to 100 certificates)
clf.clf.academy
p16.clf.academy
p16.clf.academy
p16.clf.academy
clf.clf.academy
clf.clf.academy
p16.clf.academy

Certificate

The complete raw certificate details for clf.clf.academy in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv7s4HBNBKYuR71bdp3xo
Kr7Ft9923yXR4i/NkB5inMpOwQ3inXDUqok9EWayKrIFJEx6UI4tHEe2FAehlods
DdzX9ce0CDJLrdA4894JOxgLvSqxOdNa8rsdyHNoiPpVrWy7lDzKLfpJNfTlfpvQ
UAEWCg/7aZSiK2Tufn/MvrevgMIE1w9skRnBE+T7AP0zrv4rL1oe7S4UXbwHW2UH
KmAgDu/QyYrPDUOEnpS6xYESja6d+UbcCoDybjcLJrvx81KuBLwK3VnrDN7wo5ZI
msRvpI4hL0t15H3+sxiFV/yI6CE8Ta/UtSrwSsxBaS1Kifzt4OmYrS0ZDkBUiEs5
MwIDAQAB
-----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 354017561286588472989404209136290883418753
 . . . . . . . . [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 2018-11-20 07:58:59 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-02-18 07:58:59 +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 'clf.clf.academy'
 . . . . . . . . [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 24203837466242062566675498466188249089976083746667197033450574205325274060635691584712688415540244518607709226447586508998565050531152270301909919805941929530914314875638368911419216365551429719377250892355869746752064629454240726161542261337475673989764956186117963609198188748967245716616746435887215762851387395731809880211323019556319175090935969589391339135471160670425641615402572764996854521786664736704052938629233573736504829744346290387572818642505003999035325067948463204924631870075942251291326783545320359372279130567461169374065247452156479438560808452650333035650357129036227136454949035786792570927411
 . . . . . . . . . . . . . . . . . . . . [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)
							7ec13472c5008df2952422906a31a9194c15a4d8
 . . . . . . . . . . . . . . . . [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 (60 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'clf.clf.academy'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'clf.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.clf.clf.academy'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.clf.uk'
 . . . . . . . . . . . . . . . . [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)
							00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe00000167305818d70000040300473045022100ca8ffd2746a270ec5eb40081eaac841350c1c17951249650d7e0691931121e21022013135defd7cbb7ddd02df9f767a1be07613110322b55749365cbb54957dad38600750063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d000001673058188d000004030046304402201dc66e858a5bcf5eb80a024cc464fc885e15f9553e1d684b1cc4046c55d881da02202bdde0be5f2e340af174ead453993bfdbfcaf216126e4ed48f53df021ec4d96a
 . . . . [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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