www.tavolidaesterni.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:6a:04:00:52:3c:1b:ae:cd:53:b6:c9:31:f2:03:f3:d2:e9 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.tavolidaesterni.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:6a:04:00:52:3c:1b:ae:cd:53:b6:c9:31:f2:03:f3:d2:e9
Serial Number (int): 297412107268803201398761026265121650103017
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 82:a7:f6:ce:ca:63:d0:3d:5c:e3:ae:77:34:a6:d2:ed:e4:3b:40:e3
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 22:91:46:4b:04:bb:f1:c7:a0:62:96:1a:3c:e1:49:3e:16:88:c5:a9
Fingerprint (sha256): 69:ac:1a:4e:20:0c:be:cd:c0:89:95:7a:d7:c4:fd:77:1d:b0:22:a0:6d:31:c2:2c:8a:97:27:ac:e9:cf:3d:dc

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.tavolidaesterni.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.tavolidaesterni.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.tavolidaesterni.com

Other certificates including the domain name tavolidaesterni.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.tavolidaesterni.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 297412107268803201398761026265121650103017
 . . . . . . . . [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 2019-10-09 00:43:14 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-07 00:43:14 +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.tavolidaesterni.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 720951164023528066850540517852823210556162877391220629804049027875534407852640408960880671870496685397002399083265374486023161930721979248772201857175585633687549822787025069603372594442212599917566197686813238047568706669285848174582460192001324232386297786315378335487322690927837615983383757182944329024245024144658041703213913939089089928416277641174310605661802338718882799287936683317984074230270603392324875912955212994368611842415273704249420127185737728810753620801686638014120218821925249901107518475496692075212633909536847301571865692492326314827229749592148491544508372654765029870990603671614057308288835242371652082753002338436419118158465606349308925278562529979695034762119689794947196550223076514721824271826696292643940637800931015690861779687301428881843242235418262866321223127077038544375394736165230204311723068175864974756865600309984263635653142690694791057121978808315159487116464112874804860854060125446512105877751190141939174165790512590783672858501115426878907353430062846532747040427360157810996181622914380040589495286734726558785336226995578430285071298141600546970759910985614020449226369671085137005272665631090114731639854670918963102248115462898746609882519481339963222115533952819175714831989689
 . . . . . . . . . . . . . . . . . . . . [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)
							82a7f6ceca63d03d5ce3ae7734a6d2ede43b40e3
 . . . . . . . . . . . . . . . . [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 (27 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tavolidaesterni.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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016dae2f3d5b00000403004630440220351c0d41c91c64ddf051bffcf0392b8cb866014b038a65f6691b46fecade9da502204f7c2e254ab60299ee3247d74834c5c8bb3c4c3adad48646f9dd171381d835ed007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016dae2f3d4f0000040300463044022063f3828cbca93df20f1a89908809d54d96184d9ab7e2ed844dc496e02080dc2502203d74937c7e4f6668b3c18750d0a9ed8289c7962046b0877f998fcc19ca1d9805
 . . . . [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)
		00194e4cb92f1a1945a13346b77f8487de36d0bcf321ce7137ac2a23eb2074f30b9d76b963165422e0788b5d02e22350f9759621dbe9d5e9b8e54d6c4ce4979b36b7fef7ee34a93805913b41186066b62975ffb208c10885d1df3fc0ac348204978f74f05e4b37c32552a859b6967c2d521012998716064e6e0f70b1bcc241c051847221547e697ba1232a124d8aaacba1f25c913ca8e61a3cc20a5b22429c3e6b3be49cdefd20f9e4e9caabcff1b3ca78326ead6819ac6e23fa7d9a97e4ae164e77747cb11228b21fb998de12cdf834b6cc5b202af3a30d40cafecfcd5fe35590b266c97b3f74e69fa7648e6a0375273e23d115a8acb587c1bd4665dbc7d2ec01