www.zentronlabs.com

Issued by R3

About this certificate

This digital certificate with serial number 03:71:60:46:ee:a8:1d:5d:f7:2f:01:ce:24:48:22:ad:52:23 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=www.zentronlabs.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:71:60:46:ee:a8:1d:5d:f7:2f:01:ce:24:48:22:ad:52:23
Serial Number (int): 299916739446255141307137452864183403893283
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 05:03:45:88:4c:f3:4d:5e:20:82:5d:10:3c:e1:2b:70:76:87:5b:8d
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 65:80:b5:3d:1d:31:be:3c:fc:5a:29:76:07:36:6b:1c:ef:36:7c:87
Fingerprint (sha256): 82:90:a0:92:8a:8f:cf:05:81:67:3c:7a:ff:9a:98:b0:c3:cf:56:67:9d:7f:d2:e0:45:af:62:f0:8b:9b:d1:f6

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate www.zentronlabs.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.zentronlabs.com

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.zentronlabs.com
zentronlabs.com

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support.zentronlabs.com
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zentronlabs.com

Certificate

The complete raw certificate details for www.zentronlabs.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnN5BbzcYSQnm8R9t9ZN6
7ecPtu9asCQEhH01UhYejKZRmKBWiLg9qskYSEusoVySdmc8cM78h5NEhfRP8RgZ
QLPtrJUagNck5nt/kdZ+eqJ5Mfo7sZkBpiZg8pycS+/8At8UiprABavyY6SRp4js
U7yQVGxKjn971JBS9X/FvLKjvBlMYpu1otzSbF8R2DJB15wfBJNeyyuqNdTXCYIJ
MkV0Mk7kjy3uTu4/ay5cHttuhe5tYRRKV0pZUoMHlTNVFnofUAveFY16KgkB4DxK
QSCgxvRX4q9MN49Aem9jIpTZTa/EsvLaefEwwNPQS4mfyFM+XKQXuRJ5Ufz2hQ3r
UQIDAQAB
-----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 299916739446255141307137452864183403893283
 . . . . . . . . [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 2023-12-13 01:09:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-12 01:09:39 +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.zentronlabs.com'
 . . . . . . . . [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 19802773897457830851234681030249094475900366374848864965177046662619549300240797502435431383572690245224627623358618875970123492005351474922306875822440480086639373525647263466549765115818403196468404338813335447222339232139257117965803016416259499648348277593006902935162403491184204346998122598347838298743820725863535978414319777534840759949123525442821158315998609704096394184410279244019615492025403981704685166551772188540310777521978309080661914096573310987484660437383314912438980278759469227789339328403123101679186649238932427030339627046750718988393282721501429137603005232932570802848639461375240907385681
 . . . . . . . . . . . . . . . . . . . . [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)
							050345884cf34d5e20825d103ce12b7076875b8d
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.zentronlabs.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zentronlabs.com'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee00750076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018c60efd76a00000403004630440220304232c67124653ca87b2f37f9bfc8ada840fe455b9285b66773701622c5aa570220198ea252332028bceea46872b1108a9569c6f441527b024320f52cc183f16b6b00750029d03a1bb674aa711cd3035b6557c14f8aa78b4fe8389449eca453f944bd24680000018c60efd7e7000004030046304402206ca5d485d64e0e8b68984f767a0bc46e3fe48c0076cce3c4964447ab48de85ae0220068768d3cf97bd2a135955c3d10a11d61636ad81dffde8078469992f5899a558
 . . . . [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)
		0001a623e712d53a5588003e265b1b872f7fd145561f0184cc7204b6e5c3f085dd7842a74208cb8946878aadfd12b9582581eeeebb3cc4e22094921dca375c064a0b81ac4f07d7910d844bc166d9a60ee73685c04279c38e93f2509cb6db849d18f6f85fbbe0080d1825b41c7510f587c02b4da29bc27df2714ee4ff875cba23ef089720a44df20e1b9203a5c76b757077f21c644547edc4e9767d88c64badd3c0effd8bc6aab8f10d144fead7ff6ca8add114ee9d3b4a2b0668a78a89f8766631ff6ed69bbd15e0a5d10469f4367c86e8d10a078309ce0c7e8e353699df05f1a84d9b06964a643492bca2b5ee004624c0cf85e56c0ddb54702864adc637d395ce