at-kun.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:3c:86:14:bf:df:a1:4c:0a:ec:ba:5f:c5:a9:e5:6a:46:78 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

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): 03:3c:86:14:bf:df:a1:4c:0a:ec:ba:5f:c5:a9:e5:6a:46:78
Serial Number (int): 281932024099567430725879907334714731153016
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1b:6d:a7:21:82:48:69:34:73:69:fc:7c:6d:67:bd:bd:8f:4c:4c:40
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 65:d5:f7:e2:15:ed:62:58:a4:7d:15:24:27:f5:c1:32:fd:99:18:ef
Fingerprint (sha256): 05:f3:9b:57:57:4f:d8:62:e1:14:4a:41:48:74:fe:e2:2b:15:89:85:dc:cc:0d:8a:f7:15:2f:9c:ec:05:c2:a1

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1p6dFH8pm4thyNnyJJiL
QlbU2WRMYITMihpjJJ1hkLNn584egCth0iXGiTKXd7v3qoD0uA/pyv0gLLf9vkBJ
NFvo/j3i2yj/i8DO1cCSTWxXtxrB+6Q8/bNvlX0FNCgQIwrar8QOY0bjL9ZyPXGY
IYOAXDjSqw/+2DFRr4h2TE9QG4CNPg5w10iyVuT0srndTHpMcB1aGYql7HFDYjJt
ETTjQ1f2OJtE1+NLjmMC3s0X61tY+OsyXicnqQb6T5WBghXjtguGgSkKR9iVr/+V
pT8kWPz9kOK6Gy1bIeIPXgYQ80lyjKdt27DqqI5sZ14tK0IhudXrWrei6ve/5Vza
XQIDAQAB
-----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 281932024099567430725879907334714731153016
 . . . . . . . . [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 2023-02-03 12:38:59 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-05-04 12:38:58 +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 27093212541063882862250193360236237721719807114974843565807828482036172907883056410733109897650055879240917874601566119761226609138063778026084638703348194774254905098673180146713061261360267368525540276840049376695522806904865827954704979148634220873870744092594414145076343916347356095640698432889662366207360476835438370619275139062069856583092085703095930973444498865934424197966583146325236614290033233245140706477980139001124809017360800671134408455807122283521554860629949386634230782079879763398389825748231084838475472415949127249887317362481812916348524415487553563092358641813616290698071097020174118476381
 . . . . . . . . . . . . . . . . . . . . [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)
							1b6da721824869347369fc7c6d67bdbd8f4c4c40
 . . . . . . . . . . . . . . . . [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 (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)
							00f0007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018617807424000004030047304502204f9acd23e2c8013a72879b5c27d4c10f5b09149d02e614030d305b5e8c8cf41e022100effcc34307c54eecc21c2221b8a645eab16c045a9dd5e1fc9c0d76f8f608a22b007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e000001861780741d0000040300473045022100d5c6a59044af555add4713bbcc52002b15f204e148edb9e49b9668d18258aa4d022001726c1370e3823da221fdc9fe5c4f8fdbe75541eb1b9cd4fcbae9df8463c0e0
 . . . . [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)
		002f3904054978867854bb0b4b60d91edb4b3a57d7aa285779b732159177e2dbbe6595504da8c2d2831dbcada0b3712a49ca546144cdde60e2d42f8a03f103e5d649b6f2ccf9bf9ae29e90cd1cccfd542a5581f8d97efec905e0811073905474614bb8d0d170fcaa81af6bf03dc1efb60e19d43a65f0e0e86dcf4576a9db0f19b4ae66ed403fba619bbc09dbe22cefd5a8bbe14f78babb9708dc779a34328561db8386dcceb0be459aa0a09b5f75c7d1f8ef02a30dcb92375602ac25457601e8f8aa382ae0b36a15923bf652280e5120d8b426660a9fcf922bea3527fea14065e678525eca004a0e012c996697fb0866b7245d19884735849ee38705449966de16