at-kun.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:1a:47:c5:99:d4:85:6f:4f:a1:cd:c0:1c:63:92:56:d7:11 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=at-kun.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:1a:47:c5:99:d4:85:6f:4f:a1:cd:c0:1c:63:92:56:d7:11
Serial Number (int): 270279600525453336262791963485376769087249
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 93:70:0d:30:f0:54:35:89:fe:aa:8c:5a:90:24:d1:72:04:72:ed:bc
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 81:d9:ac:03:59:dc:62:43:e1:ae:2c:df:92:50:19:04:8b:ad:61:25
Fingerprint (sha256): ab:fa:18:1d:44:3e:52:a9:58:8c:4b:6f:81:b4:80:20:a5:cc:b3:1d:91:45:6b:5d:2c:fe:7a:46:15:16:60:91

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate at-kun.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for at-kun.jp

Public Key Algorithm

RSA

Key Size

2048

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

at-kun.jp
www.at-kun.jp

Other certificates including the domain name at-kun.jp

(limited to 100 certificates)
www.at-kun.jp
at-kun.jp
www.at-kun.jp
www.at-kun.jp
at-kun.jp
www.at-kun.jp
www.at-kun.jp
www.at-kun.jp
at-kun.jp
at-kun.jp
www.at-kun.jp
www.at-kun.jp
at-kun.jp
www.at-kun.jp
www.at-kun.jp
www.at-kun.jp
www.at-kun.jp
www.at-kun.jp

Certificate

The complete raw certificate details for at-kun.jp in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0lTRFeIlBz521fWFSA72
z6+QrsZhDssufIJDfugq0hj/5cF1AOfeNFoAYAA8D/ztGAx2YgbJP4wu87xdJUj0
tFnrVKtjJDZSlAWx2xvF7Otvq/89kgrHWokzhMNnexUUk9oJiE/E5OUtaaw2awRV
7rSo0wjrG/AnyDHGePUGr+cQP6jPguxtPFEsIB3ekybJuxNlDcT0x+E7pD/LmVae
by/lN601RSLNdhipD9HBHF4s7vVo4/Vact8yCPQb0RH7niiQuXeb2Mq9RkrdNS5Z
QmHTwcQX2IfII8rR+/LhGgKnEyVwuuH3ETQJOWJVhFRS7VoWbZd4+jRwaQMh2UxP
9QIDAQAB
-----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 270279600525453336262791963485376769087249
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-30 09:47:34 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-29 09:47:33 +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 'at-kun.jp'
 . . . . . . . . [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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 26551868736274771448999106515159894617024592122666563896075341596805385379745368093976647916881451943129699831930173243658134551832061368032315423889364560218587803997999860289597101711336053460034355202464197497384156982817363312454034164997155149481948369109200799932726586436381018397859257804679914303309015068154606892617199154969152297032381461972165438334191024991449898756454987731895570652575479491793269358098960916640042238347179950762774376646212821326303003826227988336625265686508628353443716558433946007011643230708368561367189320495858121510930169916251457807259741761300629445998584344174791372853237
 . . . . . . . . . . . . . . . . . . . . [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)
							93700d30f0543589feaa8c5a9024d1720472edbc
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'at-kun.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.at-kun.jp'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee0075003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018d59fb407700000403004630440220410f762b62340d29a01c069b16e9312d8b1b17d948cf5f97b1ac15fc7d267d2f022029b2043513c083e669087f58e82e0761d26535ff33f7be6a16ad85d4baeece6a007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d59fb40cf0000040300463044022053132dc1da5a823824fcb08bdc4787292a804a9db52d05c1aadbde50374d1dc8022028c9fd7e730c85f9aca7ac56ce50c8fb1aae083544dcfde0d2361e14c756cba7
 . . . . [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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