72492.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:3d:e0:00:d4:f8:d9:72:30:b9:b3:61:2d:fb:51:0f:8a:28 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=72492.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:3d:e0:00:d4:f8:d9:72:30:b9:b3:61:2d:fb:51:0f:8a:28
Serial Number (int): 282391833568100523939133520384436198148648
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: cb:a6:3c:b8:ae:d7:ea:86:8c:ce:fe:d4:ba:66:31:ed:1e:fa:c9:be
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 45:d8:a5:59:70:91:35:41:25:7c:5a:61:2b:8d:65:bc:98:8f:0c:c3
Fingerprint (sha256): 3e:f1:a3:80:70:0a:fd:7e:56:0d:13:3f:88:9e:33:4a:07:51:fa:f2:0e:c9:98:30:e9:9d:79:cb:9c:04:b1:b6

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 72492.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for 72492.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

72492.com

Other certificates including the domain name 72492.com

(limited to 100 certificates)
72492.com
www.72492.com
www.72492.com
72492.com
cloudhostingproviders.site
69602.com
www.99424.com
72492.com
www.72492.com
72492.com
72492.com
www.72492.com
www.69242.com
beniambientali.com
worldwar.world
72492.com

Certificate

The complete raw certificate details for 72492.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 282391833568100523939133520384436198148648
 . . . . . . . . [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 2019-05-28 05:07:22 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-26 05:07:22 +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 '72492.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 779281879131468308285491648807770782541827856549972357223024132181095818537432476785082090122770278551061472437626213741589015629107599065768961975207402409518404277502718913085296165131969421640816322160383894905747298825994612306956009613294159968270744182980279331048258663151162419902793852563935851735202503282221938397914881716190525272703655587367014217560180754530281003221397062213228170725786975074862856757028659271433734014678896910635904136918230901263539525020588541189028877127443919703319552295649372489195903240463376717076716295593434778110212019097619923882328548086696435808902934578569883137963658320967881671773191158151796161203687671114501839954937799532142528520754118307571398197200447826009280423369028815326803928702304819538928112225466262163304561915630995459614554221348874125630300211832726137219258413692279323768172451117796607956309057329232977737519106435324095473931986482538019112690029342709225935673460543618424324991238422700294871796858219068302440387882890725822038304842484563820132312545550671105348075541278884131971591178867947675197185284498439570848298599710131344361586974596997315311822598774544880636738793936281489699007291122799400332688458705619244090941503746053816267434174123
 . . . . . . . . . . . . . . . . . . . . [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)
							cba63cb8aed7ea868ccefed4ba6631ed1efac9be
 . . . . . . . . . . . . . . . . [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 '72492.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)
							00f1007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016afd0ce74f0000040300473045022100d01f84ca8f49f6d17e97b199d84dd31d281a6844f1fb6ffb1f6087caacefee69022075c6afc71d31972c7fbeb649790bc3f6947db6e76d9b8a0351c9967605108894007700293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016afd0ce7660000040300483046022100ec456a10629f329fddae7e675201a4a7e6bda52641d6ef5e06116fea2a48752302210091b2609122f7db0c4e0aaaa6e47ae74cf3065b9e22284ba4c99570018371d90d
 . . . . [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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