app.zivora.co

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:b6:81:6a:dd:54:c9:7f:df:89:ac:3b:e2:a2:93:e2:16:1d 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=app.zivora.co

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:b6:81:6a:dd:54:c9:7f:df:89:ac:3b:e2:a2:93:e2:16:1d
Serial Number (int): 323440273858944848263936982250901091784221
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1c:6c:30:5b:6d:16:03:c6:cb:39:01:ae:47:5b:01:9f:d0:b4:fd:ca
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 88:ed:55:a5:7b:a9:2a:15:59:8b:10:58:5f:cf:66:6a:cc:86:92:fb
Fingerprint (sha256): bf:be:c4:94:cc:07:a5:30:40:19:03:45:56:0f:d5:66:0e:aa:1a:20:b2:81:07:74:af:d4:07:70:e9:c9:dc:f8

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 app.zivora.co

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for app.zivora.co

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

app.zivora.co

Other certificates including the domain name zivora.co

(limited to 100 certificates)
zivora.co
peteprojects.com
dev.app.zivora.co
composer.slitsoft.com
help.app.zivora.co
www.pohjoissavontulkkikeskus.fi
zivora.co
dev.app.zivora.co
app.zivora.co
reuben.honigwachs.de
dev.app.zivora.co
zivora.co
www.zivora.co
www.stockeralerts.com
zivora.co
www.phomoapp.co
algolab.uk
api.laforte.app
mariehultakvareller.se
www.enmany.com
energyandenvironmental.com
betterbriefs.dev
johnsontech.co.uk
zivora.co
restaurant.tagfut.com
help.app.zivora.co
inboard.ai
dear2021.okanohikari.com
help.app.zivora.co
zivora.co
app.zivora.co
www.amanichildrensclinic.com
*.zivora.co
auth.app.zivora.co
eflowcom.site
app.zivora.co
incollaboration.nology.io
test.app.zivora.co
zivora.co
app.zivora.co
dev.app.zivora.co
dev.app.zivora.co
zivora.co
www.prima.golf
www.danebakes.com
zivora.co
condor-widget.joinsherpa.io
www.otostats.com
zivora.co
www.zivora.co
test.app.zivora.co
dev.app.zivora.co
dev-tasks.expresssteuer.com
test.app.zivora.co
app.zivora.co
app.staging.amplisend.com
mankiewicz.vsight.io
backend.einfachgast.de
zivora.co
www.dicasparavoce.net
auth.app.zivora.co
apphafen.de
zivora.co
pigeonquest.com
fire.ioo.li
app.zivora.co
dev.app.zivora.co
zivora.co
zivora.co
zivora.co
docs.liberate.ai
indiantechrishu.tk
giig.app
zivora.co
zivora.co
www.keerthirealtors.in
www.sendres.co
auth.lonestarmri.com
payaqui.app
warranty-map.purchasegreen.com
www.zivora.co
www.zivora.co
blog.zivora.co
test.app.zivora.co
carrete.app
devweb.securityguard.app
zivora.co
tsubasa.app
app.zivora.co
app.zivora.co
zivora.co
bakpaorabbit.com
test.app.zivora.co
auth.dev.app.zivora.co
zivora.co
test.app.zivora.co
www.zivora.co
dev.app.zivora.co
www.danebakes.com
qcldc.info

Certificate

The complete raw certificate details for app.zivora.co in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2FDoOrVDY/eLAAQb5vz0
3MF4Xk3N/xeph9tXmR4hDGPynMLpZPEvxcO7nLoDAW7TUs2YB2UrGDUMWQ37uvlR
/+SutegZU/nFwGLxDXzH/n5BqXw5EnzRDxevDUGjydrtCMwa3QwctFB6XnBYdZZm
qDvtSHhBHIovZWm7rNKwjl+spXVXTR8e6aiOj1v00oSu1X4ZiAVZizJChJpvE67U
GFROtKn7fQjhBUxanNtedwOc+eCpsqe1C1HlyN3QX98fLuymiaAEKBCFz0gQZmKn
3ZB3rdkSHL1pEJRXPCaG3REb8huhCS/jhAAjKHuteNoiZYAPEwvBCPf41TsjkCWK
eQIDAQAB
-----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 323440273858944848263936982250901091784221
 . . . . . . . . [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 2019-03-14 23:28:05 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-12 23:28:05 +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 'app.zivora.co'
 . . . . . . . . [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 27307370673243615887879574583590991577242700260461388767456658368560651482114647593448676343113360153044733432429031883211109633395962130407768708622345714969256792192816794795233977096438211487101625821715219583673860817597941753249193606691067742346760357553331424696715877404947018378947626558173301269507963572240572259837956268356502315447446286698991423416735470187474421922742135973259158419712196525296741402599506388497115770555810189315060729230872205958041343843579909948158695471432623563312887739261204234990799603173548119000299380259953995280077810982867117256497820559967551757057170956786865185065593
 . . . . . . . . . . . . . . . . . . . . [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)
							1c6c305b6d1603c6cb3901ae475b019fd0b4fdca
 . . . . . . . . . . . . . . . . [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 (17 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'app.zivora.co'
 . . . . . . . . . . . . . . . . [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)
							00ef007500e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe000001697ebfafad000004030046304402206a6c2e91e066f25d7f394ad3f54081dd9bb629bb11b8d21bd09c866e4fc41c440220760e4273bb48ff6aad7306a30969d0000501718c134e4c113f3ebe8acb6e5bba007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001697ebfb0030000040300473045022100d05fd2d3f3fe7152b68c657993b5919cc77728b6dd1b6923931a21b10a4114e002201d115eaa45c90a5e9e046de0e76fba1bab88e66c9a591d4df2b0aa165150755c
 . . . . [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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