at-kun.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:a2:d2:4d:08:29:be:d5:4a:39:4a:52:d4:a8:40:05:6c:2c 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:a2:d2:4d:08:29:be:d5:4a:39:4a:52:d4:a8:40:05:6c:2c
Serial Number (int): 316742139088012402031851355675687072918572
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 79:98:e1:98:ed:ec:4a:db:e9:63:ab:be:ef:27:5e:14:3e:3e:b1:87
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 40:76:fc:b5:cd:74:76:e0:01:40:2c:7e:81:73:02:ff:fa:a4:81:cc
Fingerprint (sha256): c5:dc:50:e2:c3:39:75:f3:bd:44:8b:83:ba:6f:33:51:50:ea:2e:ae:63:51:d7:bf:9d:66:6a:58:91:16:6c:75

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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAtBQuHkFJYPreAOvqcGMs
lRsN7w7lYn86fQpdhL4uHctct1nMPptEs33xW6i6E3SNy/OCqTQ5a2+vcdJ1fjEH
UHGXBB8bM0nhq1bulFvl5PX2NM2AdJ05LXQlisE2mrTRixlO343l/GM8b+RXASp8
4VmICFRZYykTYWPTUUWDBIg8sc/To3zQqVJwukEVnK2qzDlH4G68FAfyzGTgCn5u
ZPFoehsA7+t6snDrGsUiZy0vwBJqvRK14HTeh0xYoiOIZ/ftJuxQLk3KcSfKV49o
LdC20cgA/OoD2PpqRxyFjHlfTtRp/xrI16F89/wOP2ju9xp3GCjgjMgbV56Txffj
pQIDAQAB
-----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 316742139088012402031851355675687072918572
 . . . . . . . . [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 2023-08-02 22:28:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-10-31 22:28:41 +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 22732846096325305293267799096902654871973256404394666798550284645788727441082300510042838687502717335459094461490145872303634736271775710005530279050381973989211061321196996326814377552046036295960039966041796577927260526773893912468382448360148765124401483860363841469696165412770246706507455924840214756023973262501168631174366493996325010453364937885823884420835684085648330960830494910238359391991692861436888290794149915732212320364311838414858006439112250408573842968764079561348231460816187460840796887313410950113230237487321350041999261802007053742260328990113758358408975029726272660356908794626362278667173
 . . . . . . . . . . . . . . . . . . . . [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)
							7998e198edec4adbe963abbeef275e143e3eb187
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb49900000189b8950b01000004030046304402207d3b4ee443bad056b1cc7161c53c7374031126c8b7ceb97ab065f1763ba487fa022059ea83f30594d9d04a7b18cc07f11352005791a387dd70e8a6c23e0d549831ae007600e83ed0da3ef5063532e75728bc896bc903d3cbd1116beceb69e1777d6d06bd6e00000189b8950afa0000040300473045022100ad4e13d06c884d8ec1650d9f66b58db2fd17dc11ff86c91c7932ebe2b5eab9ef02201a3f0d115c409b3172ea87f12c5e875c259def86eb1f4fd37952a8cea5d46178
 . . . . [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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