unprepared.life
Issued by R3
About this certificate
This digital certificate with serial number 04:f5:64:5d:b3:aa:29:52:83:69:77:fb:f6:86:9f:bd:55:45 was issued on by Let's Encrypt.
With 16 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=unprepared.life
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:f5:64:5d:b3:aa:29:52:83:69:77:fb:f6:86:9f:bd:55:45Serial Number (int): 431951732949890140780251600856601765696837
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 61:dd:1f:f3:cc:92:5f:3d:93:d3:f8:c6:eb:15:8b:3c:5f:94:5d:5f
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 86:1c:24:83:2c:17:95:87:12:1e:c5:6f:c0:74:98:01:96:08:85:ee
Fingerprint (sha256): fc:e4:78:67:43:1c:cc:bd:02:d8:a6:3a:ec:88:1c:79:8d:c5:af:b8:06:25:2b:ff:75:f8:f2:ed:83:e3:f1:1c
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate unprepared.life
16
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for unprepared.life
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
beaconmedicalcenter.org
carnivoresnacks.com
gadonate.statenationals.us
geniussoftwareaffiliate.com
homeschoolnft.com.tryarbitrage.com
potstocktrade.com.www.decentralizedsoftwares.com.firewoodcentral.com
profoundstrategy.tv
racingforvip.com
shesaidyes.biz
stronginspire.com
sul.co.in
thehardworkingniceguy.com
tryarbitrage.com
unprepared.life
vitalitycompany.com
wtfirst.com.mrbubbles.express
carnivoresnacks.com
gadonate.statenationals.us
geniussoftwareaffiliate.com
homeschoolnft.com.tryarbitrage.com
potstocktrade.com.www.decentralizedsoftwares.com.firewoodcentral.com
profoundstrategy.tv
racingforvip.com
shesaidyes.biz
stronginspire.com
sul.co.in
thehardworkingniceguy.com
tryarbitrage.com
unprepared.life
vitalitycompany.com
wtfirst.com.mrbubbles.express
Other certificates including the domain name unprepared.life
(limited to 100 certificates)
Certificate
The complete raw certificate details for unprepared.life in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGdzCCBV+gAwIBAgISBPVkXbOqKVKDaXf79oafvVVFMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA4MTgwNTAxMTBaFw0yMzExMTYwNTAxMDlaMBoxGDAWBgNVBAMT D3VucHJlcGFyZWQubGlmZTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB ANKchR9FPFakG7WAxgB1y0YGLyPUUkqZUtIPm9/+C6UbuDubDXFJfWTfNbZ38jw9 DexUdqaACMcNQeVIOIaA+A5/ByMAvAyCbPFr1LD42qH8havhFD3PSYwjlT/S6o3p hSj/GCHFqVNzuYlIxDl0UkepoOmM1/g/wydQVJ59rec0DSc7+eSh9wved+29/4+R EkG0cz1uXb09aVoTaeouqPlPae4VZS7HXYTxaCEwCJCrEvQZYX/d0BFuwI164+IA wDrrTVUXo5LjsCfiRoDgGfdRok/0Q+fnUcfWiHio4GqfZcmrcx75VdROmSQOsXWj hygjySovajburBjpJELVqKsCAwEAAaOCA50wggOZMA4GA1UdDwEB/wQEAwIFoDAd BgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNV HQ4EFgQUYd0f88ySXz2T0/jG6xWLPF+UXV8wHwYDVR0jBBgwFoAUFC6zF7dYVsuu UAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8v cjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9y Zy8wggGlBgNVHREEggGcMIIBmIIXYmVhY29ubWVkaWNhbGNlbnRlci5vcmeCE2Nh cm5pdm9yZXNuYWNrcy5jb22CGmdhZG9uYXRlLnN0YXRlbmF0aW9uYWxzLnVzghtn ZW5pdXNzb2Z0d2FyZWFmZmlsaWF0ZS5jb22CImhvbWVzY2hvb2xuZnQuY29tLnRy eWFyYml0cmFnZS5jb22CRHBvdHN0b2NrdHJhZGUuY29tLnd3dy5kZWNlbnRyYWxp emVkc29mdHdhcmVzLmNvbS5maXJld29vZGNlbnRyYWwuY29tghNwcm9mb3VuZHN0 cmF0ZWd5LnR2ghByYWNpbmdmb3J2aXAuY29tgg5zaGVzYWlkeWVzLmJpeoIRc3Ry b25naW5zcGlyZS5jb22CCXN1bC5jby5pboIZdGhlaGFyZHdvcmtpbmduaWNlZ3V5 LmNvbYIQdHJ5YXJiaXRyYWdlLmNvbYIPdW5wcmVwYXJlZC5saWZlghN2aXRhbGl0 eWNvbXBhbnkuY29tgh13dGZpcnN0LmNvbS5tcmJ1YmJsZXMuZXhwcmVzczATBgNV HSAEDDAKMAgGBmeBDAECATCCAQMGCisGAQQB1nkCBAIEgfQEgfEA7wB1ALc++yTf nE26dfI5xbpY9Gxd/ELPep81xJ4dCYEl7bSZAAABigc7vnkAAAQDAEYwRAIgZYXD mtw41si5fF4qhfeM0bmHK+ham6TdCeThS7yW2qkCIAPTchU/OcFLRhvtdfXwWrR3 OUdkOTcHc9aIu5U0Eiz6AHYArfe++nz/EMiLnT2cHj4YarRnKV3PsQwkyoWGNOvc gooAAAGKBzu+3AAABAMARzBFAiEAtKL7EDsxrulNjlPqyIQPxbFtNYu/BV6qNWYz CSjj5OsCIEFF5S3b/OpRySPpZ3XFgSExrbAMDc8NXsqvU3yUQwNcMA0GCSqGSIb3 DQEBCwUAA4IBAQCFBSh4yEsh4j/SIWIl15hPt6JqtkGrHBAFkpRZMk8ceFNayUw/ 89mzKrgJBK9dzK8U9gvR4mM4tn6nU7s4FcvRbB7XrjzSjNT3Ge84AMkGr+eQbOWm T+TZFqDbmdN0U3W6YKU6V2j+qNFxCgcJAmAaH5vfqACgWYsUxiE+RnJZUjlXvJbd igolCWS7ePo8x/tFevuyzXsw+0+szDvOfS2Ck/KBnsrHGv0b0WLxkmEc4CMjuV5n f4k1+ciH+0viC0S8+Eul9XaWF9eYZp7N9T3uo8to1P37v0CFVulNNoQR1jA83tEB UX3Mp0flp7Cx0x5skLvFrBk1/hhntRzPMBic -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0pyFH0U8VqQbtYDGAHXL RgYvI9RSSplS0g+b3/4LpRu4O5sNcUl9ZN81tnfyPD0N7FR2poAIxw1B5Ug4hoD4 Dn8HIwC8DIJs8WvUsPjaofyFq+EUPc9JjCOVP9LqjemFKP8YIcWpU3O5iUjEOXRS R6mg6YzX+D/DJ1BUnn2t5zQNJzv55KH3C9537b3/j5ESQbRzPW5dvT1pWhNp6i6o +U9p7hVlLsddhPFoITAIkKsS9Blhf93QEW7AjXrj4gDAOutNVRejkuOwJ+JGgOAZ 91GiT/RD5+dRx9aIeKjgap9lyatzHvlV1E6ZJA6xdaOHKCPJKi9qNu6sGOkkQtWo qwIDAQAB -----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 431951732949890140780251600856601765696837 . . . . . . . . [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 2023-08-18 05:01:10 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-11-16 05:01:09 +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 'unprepared.life' . . . . . . . . [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 26587226935659779668585026940198935026894062341739220734686094138289012068618101672681061843921388693238381690230646807330466822224595911453212504854354179475409006139308017441524333529803606689412449072250244749514269649690660076853904679560373138931425867867316454675391376186438874676869290462744727972769347532067068665253596206396761019282848091547970337603993476428121899095139516743748800563192321239464120416535273618450052213008757973360387665781097113130370891211426390366389776376303638029333985264160378044253799290970333999657877435928710139109394282102270839552005981520799862458903717722860241005422763 . . . . . . . . . . . . . . . . . . . . [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) 61dd1ff3cc925f3d93d3f8c6eb158b3c5f945d5f . . . . . . . . . . . . . . . . [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 (412 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'beaconmedicalcenter.org' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'carnivoresnacks.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'gadonate.statenationals.us' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'geniussoftwareaffiliate.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'homeschoolnft.com.tryarbitrage.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'potstocktrade.com.www.decentralizedsoftwares.com.firewoodcentral.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'profoundstrategy.tv' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'racingforvip.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'shesaidyes.biz' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'stronginspire.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sul.co.in' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'thehardworkingniceguy.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tryarbitrage.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'unprepared.life' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'vitalitycompany.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wtfirst.com.mrbubbles.express' . . . . . . . . . . . . . . . . [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 (244 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes) 00ef007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a073bbe79000004030046304402206585c39adc38d6c8b97c5e2a85f78cd1b9872be85a9ba4dd09e4e14bbc96daa9022003d372153f39c14b461bed75f5f05ab47739476439370773d688bb9534122cfa007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a0000018a073bbedc0000040300473045022100b4a2fb103b31aee94d8e53eac8840fc5b16d358bbf055eaa3566330928e3e4eb02204145e52ddbfcea51c923e96775c5812131adb00c0dcf0d5ecaaf537c9443035c . . . . [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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