www.zentek.com.br
Issued by R3
About this certificate
This digital certificate with serial number 04:53:1d:0e:99:da:db:4f:ca:3c:87:f3:e2:28:6d:51:0f:d7 was issued on by Let's Encrypt.
With 2 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=www.zentek.com.br
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:53:1d:0e:99:da:db:4f:ca:3c:87:f3:e2:28:6d:51:0f:d7Serial Number (int): 376731203606060943565997155450110333751255
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 79:41:63:19:bc:09:bf:70:8c:3c:6c:ed:43:ca:87:39:03:5a:99:14
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): cd:22:6d:8f:b9:a9:6b:af:52:ad:72:fc:84:6f:60:f8:ad:13:23:04
Fingerprint (sha256): 0f:7a:27:5c:49:43:64:92:c3:3e:1b:75:b6:5b:7d:62:ab:ce:52:ff:ea:ab:5b:a0:df:82:1f:07:54:e5:a7:ee
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate www.zentek.com.br
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.zentek.com.br
Public Key Algorithm
ECDSA
Key Size
256
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
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.zentek.com.br
zentek.com.br
zentek.com.br
Other certificates including the domain name zentek.com.br
(limited to 100 certificates)
sales.zentek.com.br
test.zentek.com.br
www.zentek.com.br
www.hugoguilherme.com
www.zentek.com.br
zentek.com.br
zentek.com.br
zentek.com.br
tekpro.zentek.com.br
www.junkdrawer.io
zentek.com.br
www.zentek.com.br
crm.wemade.dev
*.zentek.com.br
zentek.com.br
test.zentek.com.br
www.developer.bcregistry.daxiom.ca
tekpro.zentek.com.br
*.zentek.com.br
tekpro.zentek.com.br
matthewiannucci.com
www.ppsapplications.com
*.zentek.com.br
zentek.com.br
tekpro.zentek.com.br
www.zentek.com.br
zentek.com.br
zentek.com.br
rydpay.thinxcloud-staging.de
www.zentek.com.br
www.zentek.com.br
tekpro.zentek.com.br
bia-staging.noltech.co.za
zentek.com.br
www.benbellmann.com
test.zentek.com.br
www.zentek.com.br
www.zentek.com.br
www.uhladiku.cz
*.zentek.com.br
www.zentek.com.br
www.uhladiku.cz
zentek.com.br
*.zentek.com.br
test.zentek.com.br
www.zentek.com.br
metoda.app
*.zentek.com.br
mobile.energypager.com
www.zentek.com.br
aunclic.com
2022.bsjobedu.kr
www.bytecraft.in
bia-staging.noltech.co.za
zentek.com.br
www.teresaklaman.art
test.zentek.com.br
www.zentek.com.br
www.hugoguilherme.com
www.zentek.com.br
zentek.com.br
zentek.com.br
zentek.com.br
tekpro.zentek.com.br
www.junkdrawer.io
zentek.com.br
www.zentek.com.br
crm.wemade.dev
*.zentek.com.br
zentek.com.br
test.zentek.com.br
www.developer.bcregistry.daxiom.ca
tekpro.zentek.com.br
*.zentek.com.br
tekpro.zentek.com.br
matthewiannucci.com
www.ppsapplications.com
*.zentek.com.br
zentek.com.br
tekpro.zentek.com.br
www.zentek.com.br
zentek.com.br
zentek.com.br
rydpay.thinxcloud-staging.de
www.zentek.com.br
www.zentek.com.br
tekpro.zentek.com.br
bia-staging.noltech.co.za
zentek.com.br
www.benbellmann.com
test.zentek.com.br
www.zentek.com.br
www.zentek.com.br
www.uhladiku.cz
*.zentek.com.br
www.zentek.com.br
www.uhladiku.cz
zentek.com.br
*.zentek.com.br
test.zentek.com.br
www.zentek.com.br
metoda.app
*.zentek.com.br
mobile.energypager.com
www.zentek.com.br
aunclic.com
2022.bsjobedu.kr
www.bytecraft.in
bia-staging.noltech.co.za
zentek.com.br
www.teresaklaman.art
Certificate
The complete raw certificate details for www.zentek.com.br in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIEMzCCAxugAwIBAgISBFMdDpna20/KPIfz4ihtUQ/XMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzA3MzAyMTQ0MjhaFw0yMzEwMjgyMTQ0MjdaMBwxGjAYBgNVBAMT EXd3dy56ZW50ZWsuY29tLmJyMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYosX 2SYM9+Jtyp6nItAfoq93XQXyRj9kC9gCxdU75SvTkMi5YpeMVgLYtRo0XHRvIWNS QerYqhZ7KVzA3+om5KOCAiIwggIeMA4GA1UdDwEB/wQEAwIHgDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUeUFj GbwJv3CMPGztQ8qHOQNamRQwHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsU wsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5j ci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wKwYDVR0R BCQwIoIRd3d3LnplbnRlay5jb20uYnKCDXplbnRlay5jb20uYnIwEwYDVR0gBAww CjAIBgZngQwBAgEwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgC3Pvsk35xNunXy OcW6WPRsXfxCz3qfNcSeHQmBJe20mQAAAYmo+XbmAAAEAwBHMEUCIQDtH7tI5yIQ FJ+F031iVgWXZ444GdcKBoBf7GU2ccmvTAIgcByKFg4c4pxXFTS7mI/CeS4cKD5a 7CU1riss+5pavYAAdgCt9776fP8QyIudPZwePhhqtGcpXc+xDCTKhYY069yCigAA AYmo+XcdAAAEAwBHMEUCIQCi0WRMEPUpsBu+QtLxIlxset2QvAEjkza7ZUgdgGlp +gIgTP9/FPJFeuRYJ0cNFWQeEw5/Yjycqjp6+LEC6vGJCEUwDQYJKoZIhvcNAQEL BQADggEBACwXUYmsadoz2aky9nGAq+zB5GsLR0Af6gyav4PnqVtZstcqoZRo6Q6i vh/eodG96FNy6phJiF5GFmND5ia/NC2JJHopsSCxiC/eZ1Bn2Bck8ofRl14P9EmU NC1mo0wgJMK5jzNYqc87XogE3WHZZotwROQAtla0GkK7o9EggkBzDDAwVG2j67Qb p4dvtAvizijtityrKsl57J1qnDNtPPnU5g3L4fczlavIZUDBAIjd1oI8Ihqa1fOz LtULYql1bN73dzTYTMMpxmrlPEpBpqyi+X0Tra1r3s7Md1kT+YE/Oa60c7d9a4at jZNiUKiSNRqirieJ21g3QvIDkTmc26o= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEYosX2SYM9+Jtyp6nItAfoq93XQXy Rj9kC9gCxdU75SvTkMi5YpeMVgLYtRo0XHRvIWNSQerYqhZ7KVzA3+om5A== -----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 376731203606060943565997155450110333751255 . . . . . . . . [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 2023-07-30 21:44:28 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-28 21:44:27 +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.zentek.com.br' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey) . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1) . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits) 0004628b17d9260cf7e26dca9ea722d01fa2af775d05f2463f640bd802c5d53be52bd390c8b962978c5602d8b51a345c746f21635241ead8aa167b295cc0dfea26e4 . . . . . . . . [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 (1 bits) 0780 . . . . . . . . . . . . . . . . [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) 79416319bc09bf708c3c6ced43ca8739035a9914 . . . . . . . . . . . . . . . . [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 (36 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.zentek.com.br' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zentek.com.br' . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000189a8f976e60000040300473045022100ed1fbb48e72210149f85d37d62560597678e3819d70a06805fec653671c9af4c0220701c8a160e1ce29c571534bb988fc2792e1c283e5aec2535ae2b2cfb9a5abd80007600adf7befa7cff10c88b9d3d9c1e3e186ab467295dcfb10c24ca858634ebdc828a00000189a8f9771d0000040300473045022100a2d1644c10f529b01bbe42d2f1225c6c7add90bc01239336bb65481d806969fa02204cff7f14f2457ae45827470d15641e130e7f623c9caa3a7af8b102eaf1890845 . . . . [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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