cal.tsukuba.io

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:95:c6:db:36:ae:1e:e0:01:e6:3c:f5:0e:10:3d:14:3a:84 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): 03:95:c6:db:36:ae:1e:e0:01:e6:3c:f5:0e:10:3d:14:3a:84
Serial Number (int): 312303255831723377699320058707285470624388
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: db:d0:08:61:59:ce:24:80:aa:5c:07:ec:90:50:85:a4:52:f5:75:5d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): fc:29:61:4e:e3:06:71:6f:8c:33:f9:a4:13:93:36:11:b7:7d:2c:94
Fingerprint (sha256): d8:26:2b:4c:a6:81:e5:c4:04:ad:5a:2f:83:bd:4d:fa:76:ef:87:4a:a8:5a:cc:0c:64:48:ec:0e:cf:cb:3c:e3

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-----
MIIFUzCCBDugAwIBAgISA5XG2zauHuAB5jz1DhA9FDqEMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0yMDAzMjUxMjU0NTlaFw0y
MDA2MjMxMjU0NTlaMBkxFzAVBgNVBAMTDmNhbC50c3VrdWJhLmlvMIIBIjANBgkq
hkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwaakizUWN0sHfqAefepYFyszcepb3f6R
Ru+9of9Z8lXE7ZceUZwXOVdXg2MdNiucPwuTPhXoI395OXQOUJ9T9ju4hiv3RjOg
Hxc7IvQ8GXupFptSfTsmZR4pQeLInyrHS0O+Fk/c5ELpxZIw7jcD/xgV0QygI+gZ
1WphK91dKuqTv51n++SP9YKCYPb6lUJTYY+cz1ulzven70oBfROhLJohJaMQceHy
GjZA6GmWBAA37BlNP3Fxj5XjGKHpaBHxERd5oAlkQQYfSv40jDlMYC8isdfp5uA7
6MZqWiJhnxn5OE19EOVO7n+M+YfHrGA/Kom6/tEcA6vzfTI0RB3noQIDAQABo4IC
YjCCAl4wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEF
BQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTb0AhhWc4kgKpcB+yQUIWkUvV1
XTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRj
MGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5v
cmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5v
cmcvMBkGA1UdEQQSMBCCDmNhbC50c3VrdWJhLmlvMEwGA1UdIARFMEMwCAYGZ4EM
AQIBMDcGCysGAQQBgt8TAQEBMCgwJgYIKwYBBQUHAgEWGmh0dHA6Ly9jcHMubGV0
c2VuY3J5cHQub3JnMIIBAwYKKwYBBAHWeQIEAgSB9ASB8QDvAHUA5xLysDd+GmL7
jskMYYTx6ns3y1YdESZb8+DzS/JBVG4AAAFxEfmPMQAABAMARjBEAiBbKsUgU0G6
jKxqxN7n4n5aGAqlOP6+mYKRs8Hjs7+07QIgSB8X5LeVUhkhgEpbAulYS8cFaAit
0qMp2aW0CQYmzmAAdgAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToaadOiHAAA
AXER+Y9gAAAEAwBHMEUCIQDYEdqXsSqSUDorKlDQ5wygTDZXiCBmAD6WEfLnUHip
QQIgLg6VjKzz0/7gFDp8Y2jKZf9zhnT9vlLCWiQJNw5WPpMwDQYJKoZIhvcNAQEL
BQADggEBAFwFUIj7uf7nCxjARF+UESPK2U43ZEneCh+Mj8VfNtyOD0sw0NeJt41J
yKNvVPSoPI6uQ13KmUlMS2IaeyIsE2/0hv4k1xkFzR1O/qyZtm/x+RhIFebai0q+
VIQAMnSDEeU5hUukfpz4MR9ofLoaWMXdADAzP6R0aovWgyTvbXzHbwiYd0hfYLbf
/kX1ZHEsYivo454N2lg0g+cLxz+3jmU3U8w00/Z8xgWBW2sS2sVxgBgMxYZgEu53
XPQA6hUej3JvcFGYe7wrhOPUljWmN/ALRyLwiPGIEa3/CJykLPzfKfu8GxuBXb0N
H8hKp5QKyhhy3r2MYcy66M+p13PfF8o=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwaakizUWN0sHfqAefepY
Fyszcepb3f6RRu+9of9Z8lXE7ZceUZwXOVdXg2MdNiucPwuTPhXoI395OXQOUJ9T
9ju4hiv3RjOgHxc7IvQ8GXupFptSfTsmZR4pQeLInyrHS0O+Fk/c5ELpxZIw7jcD
/xgV0QygI+gZ1WphK91dKuqTv51n++SP9YKCYPb6lUJTYY+cz1ulzven70oBfROh
LJohJaMQceHyGjZA6GmWBAA37BlNP3Fxj5XjGKHpaBHxERd5oAlkQQYfSv40jDlM
YC8isdfp5uA76MZqWiJhnxn5OE19EOVO7n+M+YfHrGA/Kom6/tEcA6vzfTI0RB3n
oQIDAQAB
-----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 312303255831723377699320058707285470624388
 . . . . . . . . [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 2020-03-25 12:54:59 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-23 12:54:59 +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 24446167460737595141331787429918105863586593628568819461159680755842754801716809116558374319886441303150404636057141372019829037183684438642793093939364074296351052633730748030362179287181354639439820478756016536328868317875270465084824361622024097470491487237965088680976941218470118773371497173898923007580468373902985543703276734277638887661635425303371371261638305585888808787204924111215976289212829206874437579359719638209920013941293158316180270710776037384074889427044279772991255797103625262887003466196647328371641984956510010201215116002420040974072657716097229735326150820382639405717480158448694746539937
 . . . . . . . . . . . . . . . . . . . . [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)
							dbd0086159ce2480aa5c07ec905085a452f5755d
 . . . . . . . . . . . . . . . . [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)
							00ef007500e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e0000017111f98f31000004030046304402205b2ac5205341ba8cac6ac4dee7e27e5a180aa538febe998291b3c1e3b3bfb4ed0220481f17e4b795521921804a5b02e9584bc7056808add2a329d9a5b4090626ce6000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000017111f98f600000040300473045022100d811da97b12a92503a2b2a50d0e70ca04c3657882066003e9611f2e75078a94102202e0e958cacf3d3fee0143a7c6368ca65ff738674fdbe52c25a2409370e563e93
 . . . . [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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