www.centromessaggi.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:55:7f:e6:f4:d9:71:d2:d8:b5:d5:72:bc:f9:e8:77:6a:e3 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.centromessaggi.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:55:7f:e6:f4:d9:71:d2:d8:b5:d5:72:bc:f9:e8:77:6a:e3
Serial Number (int): 290430870133438337920992162956574300007139
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f1:35:e3:1a:c9:ba:fe:17:bb:fb:c3:eb:b6:7d:cf:3a:48:67:e7:78
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): dc:fc:2d:ff:7b:23:1d:42:48:8e:60:64:e0:51:14:c5:07:2d:8f:9d
Fingerprint (sha256): a3:7b:36:4f:b4:76:00:ab:b5:56:bf:b2:78:84:5f:4a:d5:ff:fd:40:0f:e6:f1:f4:55:e6:d5:39:ef:54:39:ee

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.centromessaggi.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.centromessaggi.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.centromessaggi.com

Other certificates including the domain name centromessaggi.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.centromessaggi.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 290430870133438337920992162956574300007139
 . . . . . . . . [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 2019-09-10 18:41:02 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-12-09 18:41:02 +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.centromessaggi.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 775964729179583628066605257342687276968743672778950336066910485342446822798353397174606604591350031862553468330787490188026688843528715133876416430618037973135100044137151780128171148370269152239244288838700824327618034002795375701236840269011308183591100347758531036384178038996989482230883942727061149192661281331819444249822098417471301711502366680513602020957699249896000518887939032443851422476333396968032604645561813438173424870289253317986428684377946478740209129278770276817768170747271120751907169626599302324039140057363257123538651850043205771940681663207823447152072664021601798088389511099706539835420309437925226307789884731184275121363756031227731028724370107256688198568680167566919549199551146360517930540344688464943310623457289747724556221797458190462238858981160542449627987544475866393420672883008220133411493667914890069291824737804392709110302974924651586352573713719283788474699840451338286593495989286611142818043341577043867961811410393377870175556989552969577325185102589767735561447506971969178178589331677317355322945728924252124160930450503309993666654012486290725067885067056388093674216835731230486436884017796879319791551506064481571095383187695929626995821951892785140094232341968604100855767508849
 . . . . . . . . . . . . . . . . . . . . [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)
							f135e31ac9bafe17bbfbc3ebb67dcf3a4867e778
 . . . . . . . . . . . . . . . . [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 (26 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.centromessaggi.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)
							00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016d1cb192b40000040300473045022100fe9f7214aceb37a4d675900317e4dd32986eb41f104faae6b9230fccf4a33dfb02202abce59787877fd22b95dc17ea67cbfa86f9f4ee48e2b1c1d52d666b381b7ace00760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016d1cb192d20000040300473045022100d4baec531cca74dcc9ff35081002b5f3bb4d8dfd2bfe069f7bb29fa4ad4112c102206f1a9121289ed082cad6b9ecc3ab9886d2cf80421eb2c8cbda08a5a2c7694a55
 . . . . [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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