89780.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:5a:9c:3a:99:4f:e5:72:68:69:6a:d0:69:30:13:e5:23: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=89780.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:5a:9c:3a:99:4f:e5:72:68:69:6a:d0:69:30:13:e5:23:d1
Serial Number (int): 292169934648264148122946562582532258603985
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 90:75:68:08:98:b7:20:f7:22:70:86:1f:17:74:41:e8:6a:88:62:7e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a8:df:93:59:22:01:c0:80:ad:3a:41:79:c5:fc:ea:b1:95:a2:d0:47
Fingerprint (sha256): 44:01:d4:16:3c:70:c5:e1:df:df:ae:89:79:ce:07:94:84:7d:c1:43:c2:fe:2b:d7:ef:6c:3f:80:d9:52:e4:19

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 89780.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 89780.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

89780.com

Other certificates including the domain name 89780.com

(limited to 100 certificates)
www.89780.com
69602.com
89780.com
89780.com
89780.com
89780.com
www.89780.com
www.89780.com
534.me
marshall.mba
announce.guide
69490.com
89780.com
www.89780.com
www.69242.com
patrasso.org
89780.com

Certificate

The complete raw certificate details for 89780.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 292169934648264148122946562582532258603985
 . . . . . . . . [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 2020-02-07 14:19:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-07 14:19:42 +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 '89780.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 690164595687018339102820251717523858858683647842251172294174386111943733965258006285575330630088069400776611180304380915999752882434587634741123660993940632913200079066924821527431260356065223880016424569334452670080926925532818331748140395595129465324046391278015152661485921113070163429234336590029342805587626763221815006355879088922143210137582863275468474035090766680247235033855882996505583688892660961774597109844946911939787829433008381934328250575789255000216555096567910903445125483585265546468383988190400954570410600971436516647819998932726041729744193427334502640075145056044388719438330208902638263585654954545399744215364460790309309389134561984531278031272560526438756166831628468065898076434783162401757738692044946501472381261389567798979670034599369159923481591017281013674040977301726205377976652821410108738097937121043797992690999119457329183093571299171966900304146020138947703039489687885185527548804346431972785102645098606964877093295825212556811119575434478458221971052888585712299210565840676541949474711379375704243432627683945511569049292039033077461532722989375987866546034635848800407600645582705249883992063553898193558612151180490818602743007961743490641113409609135679201702115819028411766529798933
 . . . . . . . . . . . . . . . . . . . . [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)
							9075680898b720f72270861f177441e86a88627e
 . . . . . . . . . . . . . . . . [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 (13 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '89780.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100770007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170203c38860000040300483046022100d1a7d9dc0d6ba636ffcf14191ed51b6f43f039fe39d64cb1eb0f38a5d184be7a02210098f9fac6f05142e808d5e6ac6333c7c01aea40ac9bd359b828affd36a4c5a64e007600e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e00000170203c385800000403004730450220083ee1dad592aed053c39bb759d16987fd198224166f594d0e529463903db4d0022100f9966d518b69343427af6f28d49007959f70dd1a5ac72fd73e8593fa6733171f
 . . . . [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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