DV SSL/TLS Certificate for www.xbit.jp

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the www.xbit.jp DV SSL/TLS Certificate

This certificate with serial number 06:57:c9:aa:4a:32:1f:e4:79:63:c1:51:d9:91:2e:57:0d:1b for www.xbit.jp was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for www.xbit.jp provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 06:57:c9:aa:4a:32:1f:e4:79:63:c1:51:d9:91:2e:57:0d:1b
Serial Number (int): 552546340535171434251782167594472538836251
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 41:05:74:fe:47:36:e4:86:e1:10:f5:92:60:6d:89:31:e6:2f:f9:c7
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): f6:b8:0f:81:3b:96:1a:71:1f:7f:16:e7:13:0b:c0:1b:19:4e:98:44
Fingerprint (SHA-256): 82:92:9a:44:d9:e2:22:85:df:0a:b9:7b:cc:a2:bd:f8:f8:76:da:f8:b2:cd:85:6a:67:53:2c:93:99:f9:10:2e

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/28.crl

Check the revocation status for certificate www.xbit.jp
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.xbit.jp

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for www.xbit.jp in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA44OWFJL+2gpaT2X9kuLj
TE1k3dznDCjsLWXpXZQNRf8HAjtIgOoSqFPjlh2ScVNdWEyr5r2fIBiXNx9/J6aN
d+jY+yqynFTYKkCt8lhqPvGhKufnfYq0718CBZ9OqN1F3uwmgTDYloijTFWIvxwf
gkH8zPe2k90GncUVFg7CeJxHNnqan7dr+I73kBdIV32hRE4AqeBSryRlm2zydPwC
FNar5iD+ynWdc0hn0B19uTcs/WxDRkOcuR271+k3CXuufDJljHjWHObHrfziDZce
yGXKrCTkCApSuzAjVtOrxmfXmvgC+AmQfXOCFwDuW9A39SwIOIQSjxAzNuxd/r3A
QQIDAQAB
-----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 552546340535171434251782167594472538836251
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-07-01 02:01:35 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-29 02:01:34 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.xbit.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
 . . . . . . . . . . . . . . . . [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 28720982826273020346701306893775695999341739103420720236545252919168751122646887798242911155132448114615721190801757518329418872269746935958603722651319552339871228835884738211433476531001843561790063569259414076810031143980369488632124263459011432150012841599169675621979580803779110828423627197451764126058226729981050660026549900805589602238045682581651760007405585049774977074538710989326135202855179310681042345942056690464806439251001966136863018459827186701487850690982362250514059747103535498989436410772218300381365763816830104660294027711639309702696869979403477517071601369985008074673935605431394748973121
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							410574fe4736e486e110f592606d8931e62ff9c7
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.xbit.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'xbit.jp'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/28.crl'
 . . . . . . . . . . . . . . . . [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)
							00f0007500a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a845400000197c3ed68f00000040300463044022034a0048000187478e3a1a7a1f6fce9411a8bcfef58682cb5e4df46ddced6b5dc022004fd5f5495196afa0353ba48c9ad4cfff40f00255ba5ee654e227751a3516a6d007700dddcca3495d7e11605e79532fac79ff83d1c50dfdb003a1412760a2cacbbc82a00000197c3ed69c00000040300483046022100d95ad1601aa44cc5506a3ef895bcc120ff3e4c4c6828024d9e548a7fa4c2ccc90221009df194cd223df4d4cdf22c7e6c36d7d29de0dfb00347c2cfea77d071156feea1
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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