mail.calibur.co.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:eb:49:80:30:72:25:6f:7b:ef:b4:3c:28:2e:be:e7:6f:a1 was issued on by Let's Encrypt.

With 5 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=mail.calibur.co.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:eb:49:80:30:72:25:6f:7b:ef:b4:3c:28:2e:be:e7:6f:a1
Serial Number (int): 428513199193750974040355578928229675134881
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 43:69:e4:1c:0e:b6:4f:79:27:78:de:52:59:8f:f5:b3:b6:88:3a:98
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 4d:1c:4b:7c:84:b8:dd:14:7e:16:22:da:c8:c6:b4:99:06:d4:7a:ca
Fingerprint (sha256): 4d:e9:4d:e6:ce:52:35:1f:a2:0c:10:31:12:c7:c3:b7:e4:32:1e:a1:f6:8f:a6:19:8c:ab:86:8c:b2:ca:53:2a

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

Revocation information

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

Check the revocation status for certificate mail.calibur.co.jp

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for mail.calibur.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

mail.calibur.co.jp
mail.cs.zohohost.jp
mail.jp.ac-domain.in
mail.thebuildings.info
mail.zoho.ftntjp.com

Other certificates including the domain name calibur.co.jp

(limited to 100 certificates)
mail.calibur.co.jp
calibur.co.jp

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0TSmPNQHbNtFBkc6Onjt
NWoCb5m/7i0IMbs5g/nY45YRdUXfSx+blL9XIffErHplag98AytdSr9ZeYaGYVrF
poEOh3MeskJvCyviYUGCf0j6szkzMdkEdjG7ZfSnPcFBold/DciwSAhQsxlvI7op
0x4Oodn+GcVqlxNoz3C2Q0K0MSWKNlx//u93InjUTvg9OhZS/GHEc1mzah8q5F+I
IxA/xV/hJMLaRcl2C9L2oMdWxIMWqpJfYbJzLZpjDVEtrk+vasUaZ1WtxnhiGAMu
aJGu4zZloqKxYAWQM9G9IB8TWMxAntxMlxgVrt8ip1x8cqnhuuMKfDT6N1hnJXgz
rQIDAQAB
-----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 428513199193750974040355578928229675134881
 . . . . . . . . [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 2023-10-11 04:00:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-09 04:00:26 +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 'mail.calibur.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 26409768107746565655858638418469852921588234102553535702350546586309135625294604112450328674532398818239372621305957736112030775783013206522119733755930329503477456529970489117095065330362457402886045542369614877622452120631248483648658695897435612786996908985410083436927701203241150715871889147901675913840713064692888766609673947883998166894926116705194251631673372971139160206095008247029937812711272226554029466578625424177758694356416989573558902678687053974968151637646808366060489951100933009013764397531153477735771544377098785212907985329466082194715005306720110134859555667272788702320345367341030891336621
 . . . . . . . . . . . . . . . . . . . . [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)
							4369e41c0eb64f792778de52598ff5b3b6883a98
 . . . . . . . . . . . . . . . . [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 (111 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.calibur.co.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.cs.zohohost.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.jp.ac-domain.in'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.thebuildings.info'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.zoho.ftntjp.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 (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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b1d1b92290000040300483046022100839cb7749e506c3fe7fe6f061d80370e39bd6f79b91f70be15183ccbc672cf9a022100ccef081cc8ca4e89d381ce8dcbb489419df7520f0eabb10b1c06c6e6688b20c30077003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b1d1b921c0000040300483046022100c32f90926a113909a20e75604758274636635fe92def7a52e721e31b99ef1f95022100e4842621596c6dbfef81125d4a5ceb5ef60e64259ac5cb7605862f8466d8e729
 . . . . [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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