le.ai

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:9d:24:12:6b:6f:2a:42:60:3c:39:02:08:e2:63:f8:df:9c 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=le.ai

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:9d:24:12:6b:6f:2a:42:60:3c:39:02:08:e2:63:f8:df:9c
Serial Number (int): 314809137250085021545730125226627913277340
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 6e:34:6d:5b:54:2a:60:27:03:25:3f:6f:ad:9d:a6:01:f0:c5:36:ca
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b1:40:e1:3f:e4:90:f5:4e:34:ad:a9:7e:8c:53:76:de:0e:d5:6d:bd
Fingerprint (sha256): 1c:13:d9:46:62:76:5d:69:dd:39:f5:16:f2:d0:ce:1e:d6:09:28:5a:5f:cd:95:ee:d0:54:5e:2c:82:21:42:c2

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 le.ai

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for le.ai

Public Key Algorithm

RSA

Key Size

4096

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

le.ai
www.le.ai

Other certificates including the domain name le.ai

(limited to 100 certificates)

Certificate

The complete raw certificate details for le.ai in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 314809137250085021545730125226627913277340
 . . . . . . . . [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 2019-05-04 07:50:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-02 07:50:26 +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 'le.ai'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 742848240819339445183224279358213011236252664400446348864035577350175959386594778378095124854970721714510897201169138647126491811256483298896398808286302486643512450660928958996644325051881220570402327141661502154624011517200673285770449641274245954713534054843296772599247330178380953577612643010235285521687964001080083722540989722090786792269488974603551578275156655236643363542647932842485293496011521067846503281480473721194356855394588851691400024265535518678232550116587303085956059022638985809308980353542828110607740123215512168915873497947830283824589777147239367867975764642600294547505175744040687323675502792870520282143972473900108367102047354930844426308162441163961166067176648388320860996407149792787113944427294804771697691029412732762146791443415059994281546493460239631997975193269259879409816295908365782380001237352259648449356682182757218094517275813166094564060746911024189525775186249345190058578534101150485732971290436161313271355438226017805224935648689563967722587465258108075808840715701838074787852633344869142309021512202923259320330682342602742847268632575068796144888694110922941621026563991970227598030910400610943105843018339470938211766437658363937091188076495055064589993417962831333797517050279
 . . . . . . . . . . . . . . . . . . . . [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)
							6e346d5b542a602703253f6fad9da601f0c536ca
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'le.ai'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.le.ai'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016a820990d500000403004730450220024c0b79fa0d7b64c92995a9f98e46180d7f9e83786c05acd57ada6c999e076a022100c35e042e8a6fe6527903e5760e7a173b2392e780d6aebb582422970805e237ad007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016a820990d40000040300483046022100f642b57831b92295debc624ad662c2dafd2fa2b3d5d671cdc72bde5912a729e602210090808041f08f0d40f6ac0cde95797b801ac23650bcc79449156f00fc555e4049
 . . . . [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)
		004ec00b3b4c99f023d121898ab1e62bef9ef8239e7b7f72ed9d4ab22b4b2578dea175f9f38236413a586c18c5a3d5def0d3c9898bc096db1ae6307fcadb33b1c18de96da5d870d203c8e1fcdd3d47293e8b66498d96d5492ee33bdaef89e798d98cd723c4969caca241f2b2213efb3ebdc495fe0a63b37cf355b1516c0180274afa247701c4f29dfd37db136374b0db5b47bfd4ae8a8ca9ef9df075678f78574c437e47261971eef57476e5fe7e2c6b377631537827ad71ed933b72f1921016d0309d5b5e827b47a8f005c79d8122bf4da35350e305ccd9e4d8c24a7b93da6c81cf9266ba8f294a9a909e6a303fd8e3fc7490e2a782d37b2908fbdf1bdbce7539