flammable.jp

Issued by R3

About this certificate

This digital certificate with serial number 03:b8:f1:0d:ae:59:48:82:7e:b0:53:eb:e2:cc:eb:40:38:fd was issued on by Let's Encrypt.

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=flammable.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:b8:f1:0d:ae:59:48:82:7e:b0:53:eb:e2:cc:eb:40:38:fd
Serial Number (int): 324269228291789761073756332207253812689149
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 9e:8b:db:dc:37:ec:fa:2e:19:08:c8:7a:54:f7:61:2d:d5:f0:49:55
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 2c:90:81:48:75:57:df:c1:34:f6:0c:50:59:34:f1:32:5f:81:d7:8f
Fingerprint (sha256): 66:a3:2c:1c:cc:2c:db:d7:b8:67:cc:7e:0e:6d:09:19:0d:bf:bf:56:28:46:35:29:11:fb:b1:53:54:65:7e:f5

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

Revocation information

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

Check the revocation status for certificate flammable.jp

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for flammable.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

flammable.jp

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Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA3/wk7J/6sBOg+Bam/Fva
AcrjmLwinFmE3rzNkp8bp1VJyIKGaoELkKvRYjOLG+zJABJnDLiDbOlNtL3+2jMU
Ewvd4Bltq3oE2ZoHERHjo0YEkRaSYExH/qcVbt3Nm00JqoaK33CN5l7H48FcqGQH
N66nhzpNd5IApvIZjB69lLC4GYn6DRxADswbltM1qLZ1Ytf+MU8UXhAqJr8Y5lCu
AOOGSC0omHmuPnufsN/mGINFdDwZHaYmmmF5f+VCY8Jc+iH9Y7I5UEbQ4aQl1zNK
Ir4tlhfgZ4/7lpZkfuUivTJYjaCwvh72olIN886Klcf5ldlN17EUoBucXPyn62TM
TwIDAQAB
-----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 324269228291789761073756332207253812689149
 . . . . . . . . [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 2023-10-14 18:42:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-12 18:42:25 +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 'flammable.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 28275478964112065780450151117889569094743748386397526742577087592787877238725502313663905250040408195916180786938548118841423534332956200066467009982122697063326271173730933884345057179450651551928486157663235852324188678467638967469024882329672581671732950495838978369548162516369160918054584680135505344452488158090534908380252433163732762801027539519568698691973383644514665180595330160561661744389745529026198973127752687811229688308875669740264267142861098252962140013875425227400728467088817436019751352369986893943725874924566876437039745494432429773849464836657585018011380025365690852503073698676316056112207
 . . . . . . . . . . . . . . . . . . . . [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)
							9e8bdbdc37ecfa2e1908c87a54f7612dd5f04955
 . . . . . . . . . . . . . . . . [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 (16 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'flammable.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700dab6bf6b3fb5b6229f9bc2bb5c6be87091716cbb51848534bda43d3048d7fbab0000018b2fb61db90000040300483046022100d6af9d47b92a8e84ca465df8e149c737b64fd7c686f4ad84348fdbde003cc711022100edd58f6db5c8fe5d5135a86c7c5953eb2973b66d27d74860c0ad8eeae6da3acc00760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b2fb61de100000403004730450220398d4569512a72f25f3121ca20b5f1814e5f975945919f72f67c46d0fdadc84002210085efacf113fcf83286b444d078c5601f5971555741e6812ec91e1dd197391f8d
 . . . . [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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