www.platypus.sydney
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:1d:59:e1:6e:d6:0c:83:b5:47:ce:c7:d3:0c:e3:27:96:ba 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.platypus.sydney
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:1d:59:e1:6e:d6:0c:83:b5:47:ce:c7:d3:0c:e3:27:96:baSerial Number (int): 271324518242429739454423913188204564944570
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 75:53:ae:8f:21:52:f1:fd:b0:10:b2:2b:6c:b9:a8:41:64:1d:d9:08
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 79:85:6c:7e:54:a5:71:47:4e:ce:44:ea:be:a7:7b:51:26:1d:18:f5
Fingerprint (sha256): 17:79:ca:9e:1d:c1:9a:e4:88:6a:27:86:41:1e:1f:f4:7f:94:df:7e:23:5a:f9:19:23:b9:c9:2b:16:76:5f:01
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.platypus.sydney
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.platypus.sydney
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
www.platypus.sydney
Other certificates including the domain name platypus.sydney
(limited to 100 certificates)
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
www.platypus.sydney
platypus.sydney
www.platypus.sydney
Certificate
The complete raw certificate details for www.platypus.sydney in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGEjCCBPqgAwIBAgISAx1Z4W7WDIO1R87H0wzjJ5a6MA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODA0MjUxNDA0MjRaFw0x ODA3MjQxNDA0MjRaMB4xHDAaBgNVBAMTE3d3dy5wbGF0eXB1cy5zeWRuZXkwggEi MA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQCWd1A5mBCtEP4ZEGfQz7hTqKMw 3dFirVxY+u/Unz7K/ZkycH37bh2RUHF1ZT0g3eAdaRNlCxAiIvyHIw+iJRwlTZCa AxXlnSX2NwoOOF8rLswL6doCmXIliXL+itzIq+Awcbf5Vlc1Bgs3QwqYmkTRQGoN XQL3Asrexk1L+c9kNZ41LhJaL4GPA42sjOVZ6zKbX8PehtOmwFIwNMNFrRsZ2AkR 5+/1RdDv+xw/tNL3t0tBp1S5f3pLTslIwFi9+VcKy1SyygA55Sy9JcF0tBltmxYa FC5X0kDIwVW7RY1LVTjo/YOC9MOFlVMkcc6z4aAPFhfrZSJr2qHH+jCDSd5hAgMB AAGjggMcMIIDGDAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEG CCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFHVTro8hUvH9sBCyK2y5 qEFkHdkIMB8GA1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUF BwEBBGMwYTAuBggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNy eXB0Lm9yZzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNy eXB0Lm9yZy8wHgYDVR0RBBcwFYITd3d3LnBsYXR5cHVzLnN5ZG5leTCB/gYDVR0g BIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYBBQUHAgEW Gmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEFBQcCAjCBngyBm1Ro aXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkgUmVseWlu ZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUgQ2VydGlm aWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQub3JnL3Jl cG9zaXRvcnkvMIIBBQYKKwYBBAHWeQIEAgSB9gSB8wDxAHYA23Sv7ssp7LH+yj5x bSzluaq7NveEcYPHXZ1PN7Yfv2QAAAFi/VWKjgAABAMARzBFAiBwISfMvubNxpYD TJVEiDLGU5ss0Uxr637r8ZJUfgH8dwIhAL4TPZY9tSPFmfq5pQazcQRGX8OYkdMr ANYl65RgMB30AHcAKTxRllTIOWW6qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFi /VWKrwAABAMASDBGAiEA9ct8t1uxNxSZI2ru1o+16L854Zz/ULBpHTCUOXJ4YKkC IQDg9F7pHoVWOBzsWbqI8AYCXolcpMI8X96jnVQJp2GVNDANBgkqhkiG9w0BAQsF AAOCAQEARG64C79bzP4ClkQLQ7c0owHuB6AvhGc97xow8qP24BnqUJ+IU1/gbF09 uV5aC4aHIaWujzVyQDPEHrastaeYUl0H6QKwqAlHk0H6l7WbaFZU+ZqmzteA9KXb GRKZPd8tMj78Q/Sj4VPySVb/FyeOte9/ajePCNcB2engZ7aNVNPXx8r5X+FmF08I N2t+yPeopBNW7EjikmDKoZq2NeZgOcmZSErDqIC7BmeXOZ2CWVGMOILBOUNhJmw1 LWaXTL3ohKj9OipVpEj+yellL4jLNlvaj7Ue4NBI9TyfEIHHKf62PVMXkFlgLNH4 MJJ3Xnfq6lDDor8LiS+6NL9aLSH/oA== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlndQOZgQrRD+GRBn0M+4 U6ijMN3RYq1cWPrv1J8+yv2ZMnB9+24dkVBxdWU9IN3gHWkTZQsQIiL8hyMPoiUc JU2QmgMV5Z0l9jcKDjhfKy7MC+naAplyJYly/orcyKvgMHG3+VZXNQYLN0MKmJpE 0UBqDV0C9wLK3sZNS/nPZDWeNS4SWi+BjwONrIzlWesym1/D3obTpsBSMDTDRa0b GdgJEefv9UXQ7/scP7TS97dLQadUuX96S07JSMBYvflXCstUssoAOeUsvSXBdLQZ bZsWGhQuV9JAyMFVu0WNS1U46P2DgvTDhZVTJHHOs+GgDxYX62Uia9qhx/owg0ne YQIDAQAB -----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 271324518242429739454423913188204564944570 . . . . . . . . [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 2018-04-25 14:04:24 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-07-24 14:04:24 +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.platypus.sydney' . . . . . . . . [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 18994581364835938711902733436751617970247056415395557880324861727534547261071041329868790184769883099990365345681147552982581677526454336676326911880424344352411062582407583677539726281158500027963984091966864968441344684970098196783368038795313841768171846405009318635400162383318843108253838033690736559941853138857259925522756332185674594992650292208501481884393646763078637694836157490869965934537639532334138974549574566690399640520596616722337300226326722230350232177410964110597053107839524699916854657337983733445652802734303284023914287778234303900185693915844753301019469021241004630920045901584819978624609 . . . . . . . . . . . . . . . . . . . . [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) 7553ae8f2152f1fdb010b22b6cb9a841641dd908 . . . . . . . . . . . . . . . . [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 (23 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.platypus.sydney' . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . . . . . . . . . . . . . [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) 00f1007600db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000162fd558a8e00000403004730450220702127ccbee6cdc696034c95448832c6539b2cd14c6beb7eebf192547e01fc77022100be133d963db523c599fab9a506b37104465fc39891d32b00d625eb9460301df4007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000162fd558aaf0000040300483046022100f5cb7cb75bb1371499236aeed68fb5e8bf39e19cff50b0691d309439727860a9022100e0f45ee91e8556381cec59ba88f006025e895ca4c23c5fdea39d5409a7619534 . . . . [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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