www.33817.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:fe:6a:c6:aa:11:d7:b6:b3:db:85:09:2e:da:12:8f:a8:d1 was issued on by Let's Encrypt.

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.33817.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:fe:6a:c6:aa:11:d7:b6:b3:db:85:09:2e:da:12:8f:a8:d1
Serial Number (int): 435022794616713818819081249377476135594193
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 3c:f8:45:44:24:a8:29:56:03:58:8d:37:b5:e7:40:1a:a3:ed:15:f1
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f9:fa:9d:97:f9:16:7e:44:92:31:ea:a9:c1:d1:e7:ab:af:f5:fe:62
Fingerprint (sha256): a9:49:a7:40:c9:0b:df:b5:d9:b6:3e:47:07:d4:89:55:32:3e:cf:85:59:69:c8:ec:ac:82:22:97:fa:21:35:e0

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 www.33817.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.33817.com

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

www.33817.com

Other certificates including the domain name 33817.com

(limited to 100 certificates)
www.33817.com
www.33817.com
www.33817.com
33817.com
82537.com
33817.com
33817.com
www.33817.com
33817.com
www.33817.com
33817.com
33817.com
33817.com
www.33817.com
78327.com
fioranomodenese.org
33817.com

Certificate

The complete raw certificate details for www.33817.com 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 435022794616713818819081249377476135594193
 . . . . . . . . [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 2019-11-10 06:42:28 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-08 06:42:28 +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.33817.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 804401873060262465524701322848513381001241389544664665416013659851076700263187351609385402167838524136284704661194891263392130847287786859923201215803096120447684901301878944853114008220004767967550469399661728525761851472720680746095808420045799708684182283665435372527111750281049267754591166358124969239864238009914987017285612026926788500809355583019873138405636484096217508902557733182091635080590754507017518540737920232557753154021910542310249986291291485421280414175178468603124457464635273558204723421708543635037204264053836553003462221959120681654895660509244879191512410696841672141119902512295387048990414712901944842342804754496058526594763332093701287246647828776161351973824447413276199682049644584610330712907426225926822328653647465342205269131463482757202880767444412386304143655567976801468207270481639074160923677478944775154487173127075820384667084581048521810948300171982082162337700091983500482857779307635997649880777371979855127634459046501888883562715435072330738394525106830383137870073216647217975338236243203626267734608430706075453531446024106770201546287338805132782863771602623161248540723079944294557628609169784803678111372812195242647261630611218063841000111441816933345736305134112729648684393941
 . . . . . . . . . . . . . . . . . . . . [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)
							3cf8454424a8295603588d37b5e7401aa3ed15f1
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.33817.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 (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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007700f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016e54439f310000040300483046022100c197a6e5661c2cd547f0361730821276ab3ed369ccc4dad26c65ae1ef5c1e5ec022100801a5de0cb04d1daea63b2bb5c089842b417fad2f0b45c9f00f99cf4739df1b300750007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e54439f53000004030046304402206ed5868177c0eadb48d5b398e974efd448236f470666f7e16c1b8c8f96545b6a0220427d55a2072addc4c3c89d0bf8fcf53cedbb9ec699d72d05230707963a0d25a9
 . . . . [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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