icequake.co
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:2c:c3:6e:69:e6:89:65:e6:30:3d:df:b8:2f:91:38:8b:63 was issued on by Let's Encrypt.
With 10 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=icequake.co
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:2c:c3:6e:69:e6:89:65:e6:30:3d:df:b8:2f:91:38:8b:63Serial Number (int): 276569054699552538155109252739112120126307
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 80:dd:c4:b6:c8:07:0d:3e:a9:cd:72:85:b9:0a:db:3e:5c:10:7f:f7
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 0e:c3:ed:77:e3:f4:53:b2:dc:5d:5d:28:ca:f3:e8:a7:f9:bf:31:31
Fingerprint (sha256): 74:a2:8f:19:f2:36:41:82:72:38:8f:9c:e0:48:1b:9c:92:a0:0e:d9:fe:6b:46:dc:9e:ec:b9:f8:02:50:03:ad
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate icequake.co
10
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for icequake.co
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
icequake-co.southernsalesservicesinc.com
icequake.co
insidevitamins-online.southernsalesservicesinc.com
insidevitamins.online
mail.icequake.co
mail.insidevitamins.online
www.icequake-co.southernsalesservicesinc.com
www.icequake.co
www.insidevitamins-online.southernsalesservicesinc.com
www.insidevitamins.online
icequake.co
insidevitamins-online.southernsalesservicesinc.com
insidevitamins.online
mail.icequake.co
mail.insidevitamins.online
www.icequake-co.southernsalesservicesinc.com
www.icequake.co
www.insidevitamins-online.southernsalesservicesinc.com
www.insidevitamins.online
Other certificates including the domain name icequake.co
(limited to 100 certificates)
Certificate
The complete raw certificate details for icequake.co in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGiTCCBXGgAwIBAgISAyzDbmnmiWXmMD3fuC+ROItjMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MTExNDM5NDZaFw0x OTEwMDkxNDM5NDZaMBYxFDASBgNVBAMTC2ljZXF1YWtlLmNvMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu5MCyE90y0nVYBb8Y5vlGdLB79hg4yr3ThOl Ob+KUu0tv/l4qoczfa8KeybURb8rCRL9KZHHDh825s7lbD8ygvnWP3VT9xynNecz N2jwA2NdNQJ6U561G0j0owEiD5NbqzUrIcZo6EHMuxTf4dlnbdNdCzq3S616Vcje KSlKSNaN6ttZhKbttAhIYam3yZIRF7ygvcbmttpV76e7z3JKeO0tpZEsFeOJ3DAn mtRm9KgxYeVIqw17c3Azig6fezc6+VJe5avNP5S10tfOeYMHnUyFpjqo618rnfIW 92Kuzpif9v89OFks0o+YifM1MRAKVs4ynEvwDOfThXcA5Reo7QIDAQABo4IDmzCC A5cwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcD AjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBSA3cS2yAcNPqnNcoW5Cts+XBB/9zAf BgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRjMGEw LgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5vcmcw LwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5vcmcv MIIBTwYDVR0RBIIBRjCCAUKCKGljZXF1YWtlLWNvLnNvdXRoZXJuc2FsZXNzZXJ2 aWNlc2luYy5jb22CC2ljZXF1YWtlLmNvgjJpbnNpZGV2aXRhbWlucy1vbmxpbmUu c291dGhlcm5zYWxlc3NlcnZpY2VzaW5jLmNvbYIVaW5zaWRldml0YW1pbnMub25s aW5lghBtYWlsLmljZXF1YWtlLmNvghptYWlsLmluc2lkZXZpdGFtaW5zLm9ubGlu ZYIsd3d3LmljZXF1YWtlLWNvLnNvdXRoZXJuc2FsZXNzZXJ2aWNlc2luYy5jb22C D3d3dy5pY2VxdWFrZS5jb4I2d3d3Lmluc2lkZXZpdGFtaW5zLW9ubGluZS5zb3V0 aGVybnNhbGVzc2VydmljZXNpbmMuY29tghl3d3cuaW5zaWRldml0YW1pbnMub25s aW5lMEwGA1UdIARFMEMwCAYGZ4EMAQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYB BQUHAgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIIBBAYKKwYBBAHWeQIE AgSB9QSB8gDwAHUA4mlLribo6UAJ6IYbtjuD1D7n/nSI+6SPKJMBnd3x2/4AAAFr 4bDDxAAABAMARjBEAiBuVu3USqxsQblEkwKdeSYzbuy1dlZK8eo+MXjnHHcnYwIg e2xumC/lsqfAz5Lfs1tfcQH76wFWjTYwMTd5xR2wlE8AdwBj8tvN6DvMLM8LcoQn V2szpI1hd4+9daY4scdoVEvYjQAAAWvhsMXdAAAEAwBIMEYCIQDiSShLeDZ9DoYF uaAEgmD5hhG72EhjEHFN7067gsc/wwIhAIrCZ+7Ktns0EXi2O6aKcZSVcjwmdtpN z4Cb35uvCum0MA0GCSqGSIb3DQEBCwUAA4IBAQArred9AmWeMIE30zutpUrnIoVX o37J5LdcVmQOyLRrsSNHOLhmJ+hXyKDSezl6vT1E6uKBzHDc4CD4xFgXrrcmdiVB FYwls1+cod9A/UKhGlnGEPTesDRhj7zZ0Z3/6OknGndwNiaNAWoLX5x7SNwpFtPX 64SMeht9zCPs0uk4gWmgWDF4PMg3gVlAuPO+3Wd/yhe5TagLyeprwKCh+uPCbrrm kHjHLPPWVS/s7FXy5a9bs+lcf+mZXf7VvNueVSGLAeSIE5DVZzrL4R/rCwb/0fBP xzCQpQgljWRrVYsJleKwH6V+m1UaipOg6ygNMg3HKu8rDFKobt9Tt79z7lHR -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAu5MCyE90y0nVYBb8Y5vl GdLB79hg4yr3ThOlOb+KUu0tv/l4qoczfa8KeybURb8rCRL9KZHHDh825s7lbD8y gvnWP3VT9xynNeczN2jwA2NdNQJ6U561G0j0owEiD5NbqzUrIcZo6EHMuxTf4dln bdNdCzq3S616VcjeKSlKSNaN6ttZhKbttAhIYam3yZIRF7ygvcbmttpV76e7z3JK eO0tpZEsFeOJ3DAnmtRm9KgxYeVIqw17c3Azig6fezc6+VJe5avNP5S10tfOeYMH nUyFpjqo618rnfIW92Kuzpif9v89OFks0o+YifM1MRAKVs4ynEvwDOfThXcA5Reo 7QIDAQAB -----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 276569054699552538155109252739112120126307 . . . . . . . . [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 2019-07-11 14:39:46 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-09 14:39:46 +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 'icequake.co' . . . . . . . . [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 23679056790033279424553716984171276414795462336274142076951057122647440048949189785145803920699796233411925383779641132744417783633175081083269195408181638045501969375332526953220453322053116787351529897035375076006631117501136380573780956396000386282265482907554006979993017686389229658856559897906226894842013433082147620584297087990410305015371244012038526850175819348038729709017708719130426546286052110763247124353969948634164586063846096684387799071976373084209553313153754928503059663088112612019107680762235770612495115020052667311893299621982652678454815157436676419459910119552979952249300527582277535246573 . . . . . . . . . . . . . . . . . . . . [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) 80ddc4b6c8070d3ea9cd7285b90adb3e5c107ff7 . . . . . . . . . . . . . . . . [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 (326 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'icequake-co.southernsalesservicesinc.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'icequake.co' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'insidevitamins-online.southernsalesservicesinc.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'insidevitamins.online' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.icequake.co' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.insidevitamins.online' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.icequake-co.southernsalesservicesinc.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.icequake.co' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.insidevitamins-online.southernsalesservicesinc.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.insidevitamins.online' . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016be1b0c3c4000004030046304402206e56edd44aac6c41b94493029d7926336eecb576564af1ea3e3178e71c77276302207b6c6e982fe5b2a7c0cf92dfb35b5f7101fbeb01568d3630313779c51db0944f00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016be1b0c5dd0000040300483046022100e249284b78367d0e8605b9a0048260f98611bbd8486310714def4ebb82c73fc30221008ac267eecab67b341178b63ba68a719495723c2676da4dcf809bdf9baf0ae9b4 . . . . [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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