zentek.com.br

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:68:b1:52:d0:70:18:cd:a4:85:df:9b:66:2f:3e:47:09:91 was issued on by Let's Encrypt.

With 4 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=zentek.com.br

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:68:b1:52:d0:70:18:cd:a4:85:df:9b:66:2f:3e:47:09:91
Serial Number (int): 296961927306277098113543591039876024699281
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: cc:95:4e:19:ed:07:16:ad:36:af:00:0b:89:b9:ca:3b:05:48:df:7e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): aa:86:58:92:fe:33:df:b1:eb:71:fd:c5:cc:b7:64:53:bf:23:65:c3
Fingerprint (sha256): 7f:53:1c:e1:af:f6:78:51:24:36:54:9f:50:6b:a0:74:a3:82:3d:46:14:26:bf:c8:09:94:de:f7:85:d3:2a:91

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 zentek.com.br

4

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for zentek.com.br

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

kfesta.com.br
www.kfesta.com.br
www.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

Certificate

The complete raw certificate details for zentek.com.br in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnysb8JDy+WgZlgtpocqt
vgwseJ6+V/ZXtsQayOLWeUhwMN0A8U3wVtrwyaGgcLiz6xVqlpGKFhMLC5uwLXHX
RwqljEPW0Injj7L2qSS3XoZdFoRd2zS100rz8o+w8hAfUK0/80h2Jf+bKGrn6EY7
7+zp3xethJnccTZXZV54g5XLuwrZWMi2osaDBVxtfjdn5yRizQVsrQeZyBIbQeKK
hHywQoKcip0CoUBLLAsdCHD3/QtijGyRfB7qOknbF6Ulp67PhYkRFQ3cGHyGBp63
fxa2wKkYXLjBMYVfCCMeC38NdCQ0AkfM+IsHGkJA9QIbAfM6aWBCxlV48+4wXNjP
zQIDAQAB
-----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 296961927306277098113543591039876024699281
 . . . . . . . . [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 2019-10-27 23:55:48 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-25 23:55:48 +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 '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 1.2.840.113549.1.1.1 (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 20093148398583403390778431942943715664069420526092539812441481967056551871976617347434691277030954371718207240651369635679249965215703388893481687064863504473727950087235930561665156530868957105201634729790872066501940937956981890124059702410588740843567099305586573360258012443024773414702977011202462143393268858188549720883187870797853889957916453128958997496984610429884259934482217023170045728766251650066109932163714900930084932828136800818123463895345956777500525330458583936343088905617234878668625306707256931523666011391200622221836262242001834812496629579377895207227751753962860697752198826841856775081933
 . . . . . . . . . . . . . . . . . . . . [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)
							cc954e19ed0716ad36af000b89b9ca3b0548df7e
 . . . . . . . . . . . . . . . . [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 (70 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kfesta.com.br'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kfesta.com.br'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 (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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016e0fdca2ad000004030046304402200a7610e5510d2b8ffe71ba57b0c931846cad246d1d21b7830ba6c5f7df47c24b0220743f62c6f6e6896ed11855d4979f3a6bc9c87f9140cdf4a7ace1e327db3f83c60076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016e0fdca2e100000403004730450220778f0f089f9f2d24d8bb4ed80194f7d1d99199c7423e84fe78f563e6a597ce36022100929c45da451b532d926de5b525f32c39e4c553468734770e6194c8098f3eb0b6
 . . . . [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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