www.telefonino3d.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:93:35:f2:fe:64:d3:28:5e:73:c0:ab:f4:67:01:65:b4:72 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.telefonino3d.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:93:35:f2:fe:64:d3:28:5e:73:c0:ab:f4:67:01:65:b4:72
Serial Number (int): 311430076511995265757631290208221372200050
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 76:76:51:d4:c7:fc:6b:38:89:0b:43:bc:eb:32:c9:43:44:30:7f:f9
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 43:24:e3:67:3f:1b:30:52:b2:d3:db:9b:90:22:34:3e:12:f3:a1:6d
Fingerprint (sha256): ae:b0:56:af:cd:19:4c:ae:31:00:0b:1e:f9:9a:bd:39:1a:8e:8a:c5:6c:c1:b9:d8:e2:d4:37:05:9e:1f:0c:ef

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.telefonino3d.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.telefonino3d.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.telefonino3d.com

Other certificates including the domain name telefonino3d.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.telefonino3d.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 311430076511995265757631290208221372200050
 . . . . . . . . [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 2020-03-15 02:09:31 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-13 02:09:31 +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.telefonino3d.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 1026822129816147803194089928886105404002718712605111293035247773749637714337464910275472669337016845373538570136727922359370445479862541559115107218362710475346727232619381776266790820236412208852665928158517647195857314983274775518789377424125609062792765805486999339497031623468575153745823101154491791910782949566767211098950748757514524815519178092502196343219876520211447741911932871616689117897289611394763770745772791712320967321451223318477355501931045166710114757113522261299352138337911362059467153042863001882814540177172449389236934794552242371925055457384236193003196699994633058010107189441330594020159350983993897498938989891296370747877295208887911888810220499826480815053079792890431909181913862913978404663495323562693446730109088512947737134296638824390902035076375431009783916867215552869521617317421430153591126769580698480880073085550905502485389190014130683674856171714419908922833482156467362617802596762716123623748278891415153862275078617911614021080786544681733311159328025754304807045263784653670932193518173755309312720298692924427859827192204518939254388665797565954566058970665573702405111956378690787651202314904755959467615459719526522404546096478283963819055876105706936582556010987761803557543163703
 . . . . . . . . . . . . . . . . . . . . [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)
							767651d4c7fc6b38890b43bceb32c94344307ff9
 . . . . . . . . . . . . . . . . [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.telefonino3d.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)
							00f10076005ea773f9df56c0e7b536487dd049e0327a919a0c84a11212841875968171455800000170dc2b03690000040300473045022100c50da2604ffa2c8e2c6a746e55b0e1170d5dcd65deba2e24170a457ba96775ee022066825bb1ff48bf892e9b36c1edd70d008af1a58fe3c99cef3e33d39600bb33c7007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e00000170dc2b03540000040300483046022100922b1e147715413e08b60541b331b73a32fc4bdd558098223ba70cf56c63c19e022100de6ef63ba2b4dd73709720d220137b015e512ff13265988ebcad6d9224f0a918
 . . . . [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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