www.mondoanimale.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:af:02:ba:c5:c2:12:87:2c:c9:3a:72:7f:54:bc:52:d2:dd 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.mondoanimale.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:af:02:ba:c5:c2:12:87:2c:c9:3a:72:7f:54:bc:52:d2:dd
Serial Number (int): 320889900240662917949451888665210347770589
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 70:c4:6d:d0:c0:d0:ed:6c:ae:22:ad:a5:49:44:f2:4a:9d:6e:b1:ea
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c4:c5:c1:04:60:12:83:29:7e:62:5c:13:00:52:83:ce:d7:3c:64:13
Fingerprint (sha256): 59:9e:b3:b7:68:80:34:d5:e1:4b:1d:8f:69:21:51:98:1c:3b:08:31:33:38:8a:b2:51:cf:5c:03:91:30:a1:7e

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.mondoanimale.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.mondoanimale.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.mondoanimale.com

Other certificates including the domain name mondoanimale.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.mondoanimale.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 320889900240662917949451888665210347770589
 . . . . . . . . [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 2020-01-31 20:08:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-04-30 20:08:04 +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.mondoanimale.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 689860430388895228307417300693320978169371404955153948609183790458440284329991027147888400069213886297706425371233667383334619459749587275510232309053519572105435408232959156503565095480963418860083797386929242754110073563978691178061457444101448856949157449579423486506825032032483858640256455203327987819152236954721782836061961026772948598000865455261795142685716851871735206474548617762390876708076001895555724464313941444702048706724131271459354671469197694674751011682984582502736699053439084572930790932160990737829912409636154475587462864632625986252720327660137350581882270275081063411879458869948334391152096462798620802741657474967409624778444424820334725530425318688925271155096058908754525936141220012000543799786391689383142711887100046738880955693169619265545343969951956030779759649127351545075981466147173568019897331310239844924265533030753035942955356817856938121537622090972948871908529082578568052029733848148124745115723216308585905189823253239356514683523570325627497010262341353303789443321699241663427589430624215481204161253014973976767749199192724102711026000164838155995464387419956562224743416351502658217556253222169687366331352877710288785959338165011890557168221873575228597892174148147403423597255763
 . . . . . . . . . . . . . . . . . . . . [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)
							70c46dd0c0d0ed6cae22ada54944f24a9d6eb1ea
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.mondoanimale.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)
							00f0007600b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016ffd6ea44200000403004730450220782526f4248da31882e26c9ee628ef37e664f581bd5f86dbd2d4092eb8b0c422022100b0db430c0f04afc78b3fb498cec4b90d7b2411108eca6058418aa30a67c600cd0076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016ffd6ea4f1000004030047304502201b7bafbaa7b794cb6ad86eea2b63ffa32dff0c1c35f1aaac16f74cb43605a255022100bb47e1bb527c098d00826ccfcb9878a4d60d4a02aa48f4d9815e4b0aea8ee6e1
 . . . . [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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