www.42075.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d0:aa:84:47:a5:d3:36:2a:89:87:7b:44:f4:f6:a4:09:ce 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.42075.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d0:aa:84:47:a5:d3:36:2a:89:87:7b:44:f4:f6:a4:09:ce
Serial Number (int): 332342245710493798129959367572894309943758
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 9f:36:9e:cd:6d:b7:e2:e6:51:d8:1d:62:a5:53:29:08:08:e5:b2:ea
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): de:6a:be:07:d3:54:16:fd:ab:1a:b8:20:f3:7b:a0:9f:9a:5d:11:d0
Fingerprint (sha256): e8:e0:08:4c:af:8f:ea:86:69:12:4a:0e:5f:b4:2b:04:c7:31:f9:ab:b7:7b:d2:a0:36:42:fc:98:bf:7f:3c:95

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.42075.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.42075.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.42075.com

Other certificates including the domain name 42075.com

(limited to 100 certificates)
42075.com
42075.com
42075.com
42075.com
www.42075.com
www.42075.com
www.42075.com
www.42075.com
42075.com
www.44605.com
40895.com
curatorefallimentare.com
734.me
549.me
42075.com
40895.com
www.42075.com

Certificate

The complete raw certificate details for www.42075.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 332342245710493798129959367572894309943758
 . . . . . . . . [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 2019-07-27 19:42:45 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-25 19:42:45 +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.42075.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 692748424851782987529394327526898150028053133685540880836337231320094088105313520666398565076168072589473016650442208900916436461326705165143120784853258633657848943106715218825389217841253568317178796059824477299162697083694497116967087523353235053120462993189807245802990350940475734918959558218545038762201264320361709255853745366645445768930146615565295457064114155205318455950455901057495340983125075847092008830376204663475238890157302455322358769728865301159089545184165748911120973845410176419419134132333461669931012469066173950240839689154376804275169939821560257324959593013347043352750674632697017499205943800837194963975361579951745920696260381122779929261306253273662544997447445062358078736588699401307480380116404411453992825929027153769755838394417378363409030217507345221090584696318554948424476811664039230723498872537418276832584534600445225564063301967221941221817140969420828734556456716874803205955798155224000315570374992546381565538208459126496746884760224985014764300524115104382923645045511898701877439620670188486774703904946880231369793422807982064205017864724900582782299879823528487663365210330853506502777888354610298966888488339166266691490419167110179606773852345342030254954607036349058787764654041
 . . . . . . . . . . . . . . . . . . . . [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)
							9f369ecd6db7e2e651d81d62a553290808e5b2ea
 . . . . . . . . . . . . . . . . [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.42075.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016c352be83d000004030046304402203853ba49afecdcf49efb4e0ba430a7280fa8e8144dc22000097733a7af3d53e1022019cae671d21971ab31c3446a911738798552e8048c06d146522f82689e532c6f00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c352be843000004030047304502210080360f466bdfdcaf3c3546ff1e19c52093a4dba7755fc9044fbfbc1ff180455f02204588a8ee0d47c27043fa464a0fe8fbac5a6f9051b9faf1ca9605806b866751c7
 . . . . [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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