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 05:8c:59:76:c2:d0:06:60:8b:85:31:68:a6:9d:b9:74:ff:a7 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): 05:8c:59:76:c2:d0:06:60:8b:85:31:68:a6:9d:b9:74:ff:a7
Serial Number (int): 483319878961655677277535121879465513516967
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 5b:1e:a0:cb:00:04:85:79:be:54:5a:1a:d0:5b:45:ec:5e:34:3c:e6
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): a6:16:52:62:7a:8a:2d:2a:e7:9e:23:90:2f:90:fb:5b:9c:6b:78:6e
Fingerprint (SHA-256): f7:46:21:bc:88:7c:ce:3c:3b:b9:a0:d3:55:23:dc:ac:05:df:ed:a4:a5:83:6b:d4:d9:93:41:61:f8:41:1f:7b

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

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/40.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
Digital Signature
Key Encipherment
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-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAxMCrP1af+Aj1Q14wx3Hl
xVrLCIIACeM08aHBm/eg48TlbUG2WdlRB90n0e0XAOGr4tkw1UgimlSWav8mpV7j
yHPqr8FQWmrpuuDHZ12DOWKlEh9BbBNvhzYFVnThRAEZnJx3bx7D7ZfmQgec+6Xb
ps+Mfi2bV1OUV9Y8mxWdUAjrfs1gYodWcQJD6GitMGj2tMtqA9v6aZMR3j2zUcWq
6lhiiXa6YzEgd4Zpisj4S/6p5GPi4JBB2asnWAgb+r8oIHrNMRuFLnvwe9kd0Qko
DNsP8h4uCew+qg7nRitJnlVOeotE0ofFkZi0oTEeEzpLsFIqSXh9R6NYSPhSZgd5
GQIDAQAB
-----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 483319878961655677277535121879465513516967
 . . . . . . . . [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 2025-07-15 02:01:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-13 02:01:41 +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
 . . . . . . . . . . . . . . . . . . . . [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 24837716366321723908086338020959036518370342039504755754848291855720229816281375389370864563354874922535207728270321921376088225324435060398928754527122212479091112052814038040846134682062239503909574043949389905839735507591976529356198624493974834639706403009124553808234632976232075749705773279181494002714857043935347510017240326075692975198674182365780572139361586460095966047797119773915870817357700807252741513809011237104636693256221814456699483336034065508796192779259934900274241606422224263123265217123313063370563539827091733871551469480493697087285059552670910018059153385449343122931108301311409163565337
 . . . . . . . . . . . . . . . . . . . . [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)
							5b1ea0cb00048579be545a1ad05b45ec5e343ce6
 . . . . . . . . . . . . . . . . [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/40.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f10076000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa34000001980c068c48000004030047304502201f497164942a8160ae49a85dbf5c8bd8c3c376bbc1c770431cfa74a7557e475b022100d986f9f74919738a6255953575f7e9fbf1b775a446b28d6e1663e727801ed22d007700ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db0000001980c068c5200000403004830460221008f04f0fc690ca44ae4a9f18089422772f04ea77e36c8146086113370e77dd3b3022100e4ebfbfe4e70987871155f0ffca16b99d5ec52482b3642f684e739b8fce57c60
 . . . . [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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