09540.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:00:b4:da:44:b9:78:57:b1:38:b6:be:1a:92:54:28:29:3b 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=09540.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:00:b4:da:44:b9:78:57:b1:38:b6:be:1a:92:54:28:29:3b
Serial Number (int): 261577252149135492717499815718483304917307
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 2e:27:6a:85:ff:84:24:6f:48:4c:97:63:30:64:6f:0b:53:ab:ec:0f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 22:79:0f:a8:c3:cd:39:b6:85:9e:cc:78:96:f3:82:1b:3d:53:0a:31
Fingerprint (sha256): 65:ab:59:e2:40:75:f9:b4:29:5f:58:e9:a3:00:52:79:eb:94:66:64:5d:e3:55:8d:78:56:56:c3:61:58:35:54

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 09540.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 09540.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

09540.com

Other certificates including the domain name 09540.com

(limited to 100 certificates)
09540.com
09540.com
09540.com
www.09540.com
09540.com
09540.com
09540.com
marba.bible
www.kangallar.com
www.09540.com
www.09540.com
www.09540.com
09540.com
www.09540.com
www.09540.com
demonreddog.com
41924.com
incomes.world

Certificate

The complete raw certificate details for 09540.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 261577252149135492717499815718483304917307
 . . . . . . . . [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 20:28:57 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-25 20:28:57 +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 '09540.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 697845375560581699910280237918365582068688749777604503740344156148756682705702820007112042972314016191518113826012650751504321388430880002162204073822492039825615545327754796523189328701350852644059870564673468624848469876451549282386938121875309214572529137369175293830091115049816557381620546567150108662791488847104256327115945398946476688288796207055950508982969593587256764571686065169215285764915575722059538277093618806446515685755892725145584979756918247549409681211793696432795224406757488446556073244057344482786997926106149388862592833027851627168057034763009816641918339791333724074930057932865460220819840446373247927698186307077758938892900437275907684922204681111612355362687182014989575518596874499850545216320051317077836070682725136519491416341830404994596689705406667142158936091063059130494911379818737619346221142624172527519439418643023295208859124875240405256307378309063538126913016946883708043176835710217811638186576854389289286652397644766159844888319298280728573234427971780643618612054379103027474729080005490897565440296628526111133740398528041269556861922080819084137084779152140518931563615217925091090942027703572129051385435898135007904679296238237355924339813583452092336895113429932241136950467201
 . . . . . . . . . . . . . . . . . . . . [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)
							2e276a85ff84246f484c976330646f0b53abec0f
 . . . . . . . . . . . . . . . . [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 '09540.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)
							00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016c3556352d0000040300473045022100b6ab031baebfa379a0909d69d793a4113f1093f755b2961dad8f63731aec7a080220768c9f71ff0f50593acd929d9d1fe9a8670be9cc74f03e55b907388ef9a57e5c007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016c3556351f000004030046304402205aec4e45ab26228bc32c9e4c4dbb3651847b2de7afab37f485c269c43486f124022037951514e1e435f49fd261ab6f2bb650ba2f6027f5529989af7a3c032d56e9e5
 . . . . [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)
		002107dc645c1f78195fda11bbe3397b2784647248f4d5c396d466b2d0f280d018e6e00a3b3ff853d4b03ec5cc9ab39c4456f61d6750b8d1e7e86ae4ce5e87c47b07bd0c17d0a1a0f0465360b848f8f321371ea47c7ed7b7a16cf45e19c98e5fe72035ef457ec86112923739a4c27136a9860cc9c73d09776b75301f3c1b6218f6a9cb5fe237d4350af8ceb614478a682edf0ac82a9553248e1653e71fb7e94149a9302bf74b8ebff70d4b0dd3bf3b0cd70ef026b23638558882f87678b77459e4fb6ed7dbdbb76147573c686b1372d6d84048e0ce0138e0352e8adf0c3a92d172139527b63ad65e07f74e46a48d66801fddc8dfe154b59c3ead9fc1c4aa7e8a4c