cal.tsukuba.io

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:a1:bd:63:60:3b:82:ca:98:2f:b5:b1:5b:e4:76:40:e8:15 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:
  • Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)

Certificate Subject

CN=cal.tsukuba.io

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:a1:bd:63:60:3b:82:ca:98:2f:b5:b1:5b:e4:76:40:e8:15
Serial Number (int): 316374058949970438117263142702903933855765
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: fe:c7:c3:b6:b1:2e:6a:72:23:22:4b:00:ce:9f:8d:fb:9c:15:78:f8
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): c0:4f:d5:17:e0:7e:46:80:ea:a1:b8:b8:34:96:61:ab:54:ae:d1:8a
Fingerprint (sha256): de:33:09:79:9d:01:47:bb:9e:8f:b5:14:83:7c:59:05:7d:d2:f0:a5:66:97:f7:3a:a3:1e:d0:09:9a:f4:8a:94

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate cal.tsukuba.io

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for cal.tsukuba.io

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

cal.tsukuba.io

Other certificates including the domain name tsukuba.io

(limited to 100 certificates)
kasuganoff.tsukuba.io
cas.tsukuba.io
cal.tsukuba.io
kasuganoff.tsukuba.io
cas.tsukuba.io
cas.tsukuba.io
cal.tsukuba.io
cas.tsukuba.io
mastodon.tsukuba.io
cal.tsukuba.io
battle.tsukuba.io
cas.tsukuba.io
cas.tsukuba.io
sohosai.tsukuba.io
gaborzay.com
mastodon.tsukuba.io
cas.tsukuba.io
ridecabal.com
www.rush.app
cal.tsukuba.io
x.tsukuba.io
plaasch.nicolais.ch
nkrenosplus.com
cas.tsukuba.io
kasuganoff.tsukuba.io
kasuganoff.tsukuba.io
cal.tsukuba.io
cal.tsukuba.io
x.tsukuba.io
elph.ca
cal.tsukuba.io
kasuganoff.tsukuba.io
cal.tsukuba.io
cas.tsukuba.io
cal.tsukuba.io
cal.tsukuba.io
tsukuba.io
kasuganoff.tsukuba.io
cal.tsukuba.io
cal.tsukuba.io
www.blog.getonetab.com
cas.tsukuba.io
cal.tsukuba.io

Certificate

The complete raw certificate details for cal.tsukuba.io in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7aWdbrgj55c+NkC1ESma
JpFn1XXsk1UHpbhW3Iff4/kXP5tDE39tNjH9wf8xaKVVBO9vTuoeWrhqoPJV6/8w
uUAxNJisPuhHxzlXG2LxIsjqgHHirvwBO/v4EkDllkl20dh3EqPiiaWM7XZpl3s1
x+ZbucmKRL4hHE5roGko4yTdTQojwZlpojscjKqH7tzPeNDsv4ggdRQLvoQqSlJG
aa4qOZWR7Y3Xb+Nz9t0CXZz7ofyiV6RIq3HrARk0sUqCwWoIljEcV/u60Vl1iPNc
Tn313xME4aLRfa4/DFcerDIO3PdsmJciNOzBNrJG3SNs85TsLkVc3Bq4j8lTuqGi
kQIDAQAB
-----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 316374058949970438117263142702903933855765
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-05-29 21:56:35 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-27 21:56:35 +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 'cal.tsukuba.io'
 . . . . . . . . [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 30000146062804383587354855020970528109040841351988111774254393028279485667912843793109507464554100976713040485580573731029555778220904245318530988646388535708751326300654826441903004231314933555248803448428965647724097916575124529316341085138868367711017626959274060598587169756993595296066174507487861275107881594958540770043132992633069255356816269601061255614558876910404187332954940782597240693878374886158028967103692402615955509418377070371724410198257094609769021819885475900342953771618004633327406565870171187047231526768056271928351191462644143112917096963256716078019071220990392112180328886559725557228177
 . . . . . . . . . . . . . . . . . . . . [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)
							fec7c3b6b12e6a7223224b00ce9f8dfb9c1578f8
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cal.tsukuba.io'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.2.1 (cps)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:22|false] IA5String 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016b05cf3cf90000040300473045022100a0dc1248ad22e79dc47ac596e7491cca4a5f1050369f3d64fb3f8512d8f9718602205938c2faec5610edac8136c9312f2129d19c3eb15ec4af5adfae0d4e09f3f34f007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016b05cf3b2f00000403004630440220594a54b344899895c314281401f686b4e37b2333a2a799e5c0876e80f9001635022067f9a0dd27a6ee86fee44f52d5cda8c405aaa60f8ce7d14f186c4d2121372bfb
 . . . . [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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