yamamizu.co.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:fb:f1:ac:32:71:7e:aa:b8:c6:64:c2:33:ba:c4:3e:46:c2 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=yamamizu.co.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:fb:f1:ac:32:71:7e:aa:b8:c6:64:c2:33:ba:c4:3e:46:c2
Serial Number (int): 347068969937592591032798013627955784074946
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: ca:17:2c:f3:d0:1c:12:6d:c4:0d:d5:b8:49:ee:9b:b5:c2:86:16:02
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 37:60:14:56:9c:c5:26:8b:1b:a2:2b:ed:dd:51:b3:f2:a6:64:9c:c4
Fingerprint (sha256): 93:ae:25:52:b4:f7:a4:d8:76:96:c3:2e:69:c7:ed:9c:f3:3a:ab:5b:a2:8e:f3:df:38:30:e2:55:3b:ff:48:7b

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

Revocation information

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

Check the revocation status for certificate yamamizu.co.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for yamamizu.co.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

www.yamamizu.co.jp
yamamizu.co.jp

Other certificates including the domain name yamamizu.co.jp

(limited to 100 certificates)
citrix.yamamizu.co.jp
webmail.yamamizu.co.jp
yamamizu.co.jp
mobile.yamamizu.co.jp
yamamizu.co.jp
mobile.yamamizu.co.jp
citrix.yamamizu.co.jp
group.yamamizu.co.jp
citrix.yamamizu.co.jp
mobile.yamamizu.co.jp
webmail.yamamizu.co.jp
yamamizu.co.jp
group.yamamizu.co.jp
group.yamamizu.co.jp
group.yamamizu.co.jp
webmail.yamamizu.co.jp
yamamizu.co.jp
yamamizu.co.jp
yamamizu.co.jp
group.yamamizu.co.jp
yamamizu.co.jp
webmail.yamamizu.co.jp
webmail.yamamizu.co.jp
yamamizu.co.jp
yamamizu.co.jp
webmail.yamamizu.co.jp
citrix.yamamizu.co.jp
mobile.yamamizu.co.jp
yamamizu.co.jp
group.yamamizu.co.jp
webmail.yamamizu.co.jp
yamamizu.co.jp
yamamizu.co.jp

Certificate

The complete raw certificate details for yamamizu.co.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxAZvb8NBqS3OGQiu0NSS
CfJ8nF+HInK32SL9vu6tmVgMnHZkZIsmut3UKlqvaTizHPaaRdh3r1rHXCCO35EH
WtkPTDg7FAnpBPmYHPENjYGdfCkraIxa0Dd+3GcLri1V4EsJieuSeZ82/omBn9g8
nu4NehmYGjUotrSPZb1Zpf+KiX1cyH/iiS6LzsjHYpaJC25im81pKMzOuGjbiDCR
ZAybhRKupZnUoxr21bSmoEozk+/f06mRoO7BUZfC7X7QQPe6GvJXqhIQN+WWis99
1nHm6eUOCBof+wxopuRPUNOcHyaw3kpIeAONbvfGJdiZvpHzD17v/GInEo0RzC4E
ZQIDAQAB
-----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 347068969937592591032798013627955784074946
 . . . . . . . . [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 2024-01-31 04:30:41 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-30 04:30:40 +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 'yamamizu.co.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 24745881137613400538143716888385454466504132146370860056450255049285216327816030498475354031504084566622199860404058827040985527552758404139028516506151062265594586633395674798088741335256406891290080340653143977004248687003099337971801951845599991420051131538224432914208969756926979287925409953759088657171176244955955955450495614876722035146008951370256914500736858025348388802345614002919516012497578277184201731210887782416910610039010532647099381336730301659316783306092889491830580970878332468654908834433468531098241000330611198761956159181344874877040540313584691375056699272252554727875615695014088032519269
 . . . . . . . . . . . . . . . . . . . . [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)
							ca172cf3d01c126dc40dd5b849ee9bb5c2861602
 . . . . . . . . . . . . . . . . [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 (38 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.yamamizu.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'yamamizu.co.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018d5dff7d7b0000040300483046022100f88456ed98e52e3d4840f2795e57c9dc18fc347f11180c69a8c21d073cf7f462022100b55ae45df427f43903da9e91b2e889f53a0d2dde08d14169a1ee95f720f46b96007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018d5dff7d76000004030046304402206489432c64d5cfb3c33a7c7913707364b8d2bb46878f241475be386b73b2afca02206ef6aa6b83c79b3553491ac6f56d473a245ff04af0933d180377207e2ec9121c
 . . . . [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)
		006b07d04d7c671fb23d169e5a70a1bde1ca75361cf1cb3af1989d5b88ddc8dc4f7f1c7eb4b77bef8ee49be85336a62f47f452fa8eed44e1068b11376b52212658537a46981a1a4be0bfcd067f5c9b1e4918907cc0e681af8a305b5d4fc97674eba53d38589de971db47c413cc416c8825cf22fdcf45513bcebe53e67c902098b16407a322e0d234d2710e7c6b96d6afd5f0c978377c08279ca0d10ceda93a3f682023780d06e8d9a2b2b5930b8fdaf3abdeef63db965947ae1c7fc4ce281004eecfe534e4bd7fd2b785f33e35bffd75ba41810cd4bd53f18f590a03a7b452628b92722d240d8c1f292763ae695602cba53dd265168e6fa49ab48a4faee87d5845