tachikawa.or.jp

Issued by R3

About this certificate

This digital certificate with serial number 04:e1:35:f2:64:64:e5:12:59:ec:d5:82:a5:8c:d9:9c:64:fb 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=tachikawa.or.jp

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:e1:35:f2:64:64:e5:12:59:ec:d5:82:a5:8c:d9:9c:64:fb
Serial Number (int): 425084383940103177704471641692822962988283
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ed:c3:f6:4f:d3:c5:ed:5d:42:7a:d7:d4:47:3c:88:0a:ea:a7:d3:de
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 6a:50:9e:0f:32:4f:ae:3b:10:78:d6:80:4c:c1:1d:c7:fc:d3:37:f3
Fingerprint (sha256): 27:12:d3:69:29:7c:ef:f3:a2:30:ea:b5:0a:8b:69:5e:03:0e:eb:80:5e:39:07:ac:40:c7:d2:e3:75:11:74:a4

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

Revocation information

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

Check the revocation status for certificate tachikawa.or.jp

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for tachikawa.or.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

tachikawa.or.jp
www.tachikawa.or.jp

Other certificates including the domain name tachikawa.or.jp

(limited to 100 certificates)
tachikawa.or.jp
www.tachikawa.or.jp
tachikawa.or.jp
tachikawa.or.jp
tachikawa.or.jp
tachikawa.or.jp

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAw1yvexxz1HR0kWvY7cPd
UzLrMRJWkuZL5qix9MhGSYysOUgajTq6REtvvy2yQD48bJJVT2Xcmp+hDlbf8ITI
DaBhi1zbHJX8/GToU01Fdj9w6ik94akGcmhnrELOoaBIBKH4ml9rUkk5yENL6Gy5
NDZ9rQ9Sac7GrW73IDIG6Zm3S6dXTR2L58w73J3M9J9trTQ2uneLRXdYkVxoX4TK
mQw5rqZb2oefPSrr1gd8kduajDFQ5+cDZtZoRLm0jgRsK0PHAXLbWhvOM8zwesWX
e6ip5J7olXAafopUbTZbxCt/ibcGgpjkLVy6ASZkFzK4gTDBXuYgKmbMgPPrqiZM
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 425084383940103177704471641692822962988283
 . . . . . . . . [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 2023-12-19 10:06:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-18 10:06:26 +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 'tachikawa.or.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 24662174378206514259329618789803529764053723536357694031882209591298495235418829024955184547972255145871825627012802178085833256298039725699730529045745360155601599672113946498778410181837563691504979061496824770307691363434918251643480591385029311931776190410640388081618427400413224315253903122155879610944351290242924233490431285265594206382147485487823516495979067549664545230489296828615857157149427529544494197870344615758736492780160620318279343785885804887696627376145130999039802549535052140135718025859314149255045745294485339431990782798314287117359850003009758685357687755695516467283171932467274352839759
 . . . . . . . . . . . . . . . . . . . . [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)
							edc3f64fd3c5ed5d427ad7d4473c880aeaa7d3de
 . . . . . . . . . . . . . . . . [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 (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tachikawa.or.jp'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.tachikawa.or.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)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018c81c173710000040300473045022100a8b81f14c3c2cbc32368512cc18cfb8c9541308575f9c4f07f9eee13385d119602203e26b8e0e8eb08692632c9303295868ebe93ad80e01fc0f2c071dedc529266b400760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018c81c1756a000004030047304502207374e4722e4246e5009e80ddc1505f280273f0c91fec48b3ecd43a909889bffa0221009bd3732a7211f5666eff48772d9b6ea95199fc824f66c29643892df8e1e8c394
 . . . . [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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