www.clarinetto.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:f8:eb:0d:ca:b0:bd:b8:6d:ed:1a:1c:20:50:d5:3c:b1:f5 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=www.clarinetto.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:f8:eb:0d:ca:b0:bd:b8:6d:ed:1a:1c:20:50:d5:3c:b1:f5
Serial Number (int): 433151610913351953876770764964929323446773
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 5e:6f:3e:ea:ab:6f:25:b4:9e:18:cc:52:f4:e5:ce:98:da:d4:0d:40
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 31:5f:c7:94:d7:26:33:6f:3f:1c:1f:7e:3b:a4:e3:a9:ed:2c:4b:77
Fingerprint (sha256): e1:d5:92:36:0f:90:9a:55:fc:77:82:4c:6e:b5:a3:1f:78:59:69:06:91:32:81:79:cf:d9:bb:5d:19:ba:5f:f4

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 www.clarinetto.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.clarinetto.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

www.clarinetto.com

Other certificates including the domain name clarinetto.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.clarinetto.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGXTCCBUWgAwIBAgISBPjrDcqwvbht7RocIFDVPLH1MA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAyMDIwNjQyMzhaFw0y
MDA1MDIwNjQyMzhaMB0xGzAZBgNVBAMTEnd3dy5jbGFyaW5ldHRvLmNvbTCCAiIw
DQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIBAO/MBH4QZkRFBNRo8zuaMCxvF+Ep
qhv5bwLvgqV06Nmr/eS6q9CxNsIxmRnCswDTAWfn7b98nhGIKb+HfF+5ZMxdyDLU
BL/QSMwOdlynPOZrra0JG0zWdDzhlhNBC5Sv3nExVPWvbGK1NcBAUyo+/MUQt5sf
mcETqoSaUzx6GmHosBbJfd9OtNvPvUEhDnF0IJnHhrWS7cD7UDJePXMMS05zsIYm
ZPS5mKIrZgB4cJWty41ADOE9V9ivBLrs2B0v10/6V1A6AxaqpqcJT9jxkqEbOFW1
2adD8ilebQEcOCJ2i/17wFZj9S/c2wHwkDSYtjfm9QmbffR7UPf2vvDrNAfz6/ok
5CbCQrRDJS/2aRcWpfB9Uzg/9QS+xswdoiPN/Wmi+yix6q80ccBNAYbyGZT5Ym+3
t/HdHF/KY+kNjxOStGTkKnNefP4XzhE3asrEVcztswq8l5q7pe05+F2JholU8KDe
+HN6JgvLJYSXjUIwwQUpJXWhqK0YNk7aYYgaHSfmc3GfnQx9hTL+MeLvFmEoPH0O
2efpyBP/RYCmm6H+80W8ow36OjUjnTzZR1NjfFpZK9wTCO66VcBsg+fhbqhB/FSp
W1oWkrKMHoBYt7EalfK/X5o5he0MW1Bf9Ejr+KnCRYq29Ohm2/QYiffoPEnH+k71
F4FE/cEJUhwmBK1XAgMBAAGjggJoMIICZDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0l
BBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYE
FF5vPuqrbyW0nhjMUvTlzpja1A1AMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZF
Ze/zqOyhMG8GCCsGAQUFBwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3Au
aW50LXgzLmxldHNlbmNyeXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQu
aW50LXgzLmxldHNlbmNyeXB0Lm9yZy8wHQYDVR0RBBYwFIISd3d3LmNsYXJpbmV0
dG8uY29tMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYI
KwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBQYKKwYBBAHW
eQIEAgSB9gSB8wDxAHcAXqdz+d9WwOe1Nkh90EngMnqRmgyEoRIShBh1loFxRVgA
AAFwBNn2pAAABAMASDBGAiEA9929l4SRo3xROKZPY1nC2owMhLTSW8IVrTrySgO8
PNACIQDoP6+t5YgMGPczDXlvMPrlZv3PwIu9yee9aIiSr2i4MAB2AAe3XBvlfWj/
8bDGHSMVx7rmV3xXlLdq7rxhOhpp06IcAAABcATZ9skAAAQDAEcwRQIhAMv5kL+O
G82O5L41JSFmY8ZvknSiX+El9bLNnxMTkBoxAiAIrVK/gqbdcOrrjuztev5di43m
9swbnK3eOGEg93WfpTANBgkqhkiG9w0BAQsFAAOCAQEAgD2Q9CGC9A5ZZH+EB0+s
4Bck+bvilvbTUS1f2ajcJhBMWeSFQ9haY04kwI+X5AMmf6BvjWx+nVWcG4mMoIfW
lz/E6HopOXuV5hIhByCUP3AMgGLDHGwceUIvwvLuH1rGok+i8U300LVo8+0ZJx7z
4K0X0re3qeursdfWdN6Tt1AqLhhiOCIYClRxFImjNCAqY4lAe1D1lc4F01ciOrcU
oBZlKdddUKjhv8MyZpTdu+nhOnglxykXPLJSWe/4hVAu5F1Xc9kIxBLZ+5aEJeuB
IlLoGFtW34DzKE7/aKPsi5mS2mZiuM2cyT1j3w/T3o3JjPKtsqxGsFsHtKvhKvx7
yg==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA78wEfhBmREUE1GjzO5ow
LG8X4SmqG/lvAu+CpXTo2av95Lqr0LE2wjGZGcKzANMBZ+ftv3yeEYgpv4d8X7lk
zF3IMtQEv9BIzA52XKc85mutrQkbTNZ0POGWE0ELlK/ecTFU9a9sYrU1wEBTKj78
xRC3mx+ZwROqhJpTPHoaYeiwFsl9306028+9QSEOcXQgmceGtZLtwPtQMl49cwxL
TnOwhiZk9LmYoitmAHhwla3LjUAM4T1X2K8EuuzYHS/XT/pXUDoDFqqmpwlP2PGS
oRs4VbXZp0PyKV5tARw4InaL/XvAVmP1L9zbAfCQNJi2N+b1CZt99HtQ9/a+8Os0
B/Pr+iTkJsJCtEMlL/ZpFxal8H1TOD/1BL7GzB2iI839aaL7KLHqrzRxwE0BhvIZ
lPlib7e38d0cX8pj6Q2PE5K0ZOQqc158/hfOETdqysRVzO2zCryXmrul7Tn4XYmG
iVTwoN74c3omC8slhJeNQjDBBSkldaGorRg2TtphiBodJ+ZzcZ+dDH2FMv4x4u8W
YSg8fQ7Z5+nIE/9FgKabof7zRbyjDfo6NSOdPNlHU2N8Wlkr3BMI7rpVwGyD5+Fu
qEH8VKlbWhaSsowegFi3sRqV8r9fmjmF7QxbUF/0SOv4qcJFirb06Gbb9BiJ9+g8
Scf6TvUXgUT9wQlSHCYErVcCAwEAAQ==
-----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 433151610913351953876770764964929323446773
 . . . . . . . . [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 2020-02-02 06:42:38 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-02 06:42:38 +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 'www.clarinetto.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 978286178279687004005553635981361089387616542942348990013934185663493601114670316973970830276501724003243503352975055578230802243753230084427677362842513595052398632666048683480623465584566594955425657127890166564734646658910959507123702753335568752014021398148200095875797829034456701068501836830627514331341865666412000514671507674220418072432463194108638144863568209924291746367575807142798239807824616039823141812742694403764688853855670136526984592351957959320521489277184396695256247200817606424294012419943077322050400174762709223399046637887794456323199160926944109210248014426363348559197181749911939443508550590654183680247547818033900060630957140056811022237593803105814704794961455337161855006283184844722660439115755384103080070998048033229982230542744100001104893989096193369811919783696233262874846262190790718362956795434835576007295529372634499356436150328776406032421166220269842277143432128483262668528996551188428700886555206582160845768813146183395675371485231468336335115288405357867477018106229423641423637000540866071923887268531071927466666944223581149482699243824242102219060074154600345257658385828992496489091546539733984885788922582321531774595207529686872092324351588495539752271451767924417702784183639
 . . . . . . . . . . . . . . . . . . . . [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)
							5e6f3eeaab6f25b49e18cc52f4e5ce98dad40d40
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.clarinetto.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000017004d9f6a40000040300483046022100f7ddbd978491a37c5138a64f6359c2da8c0c84b4d25bc215ad3af24a03bc3cd0022100e83fafade5880c18f7330d796f30fae566fdcfc08bbdc9e7bd688892af68b83000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000017004d9f6c90000040300473045022100cbf990bf8e1bcd8ee4be3525216663c66f9274a25fe125f5b2cd9f1313901a31022008ad52bf82a6dd70eaeb8eeced7afe5d8b8de6f6cc1b9cadde386120f7759fa5
 . . . . [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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