staging.live.joymo.no

Issued by Amazon

About this certificate

This digital certificate with serial number 06:65:dd:11:a3:84:06:81:dc:d7:3c:9a:52:f5:ad:8f was issued on by Amazon.

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=staging.live.joymo.no

Amazon

Organization: Amazon
Organization unit: Server CA 1B
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 06:65:dd:11:a3:84:06:81:dc:d7:3c:9a:52:f5:ad:8f
Serial Number (int): 8504273767428348128372368345170029967
Serial Number lenght: 123 bits, 16 octets

SubjectKeyId: b8:5c:de:c2:c7:e6:96:3f:95:c8:b3:9d:b0:55:4f:eb:cc:4d:ee:5c
AuthorityKeyId: 59:a4:66:06:52:a0:7b:95:92:3c:a3:94:07:27:96:74:5b:f9:3d:d0

Fingerprint (sha1): 27:91:1b:b4:9d:25:3d:0c:21:0f:a4:1c:47:ae:e4:45:90:aa:b1:b1
Fingerprint (sha256): 03:4c:51:06:0b:de:34:7d:11:3e:25:be:74:87:88:d6:32:85:db:c8:9c:ca:c4:a4:78:bd:7b:62:e2:5d:6b:49

Issuing Certificate URL: http://crt.sca1b.amazontrust.com/sca1b.crt

Revocation information

OCSP Server: http://ocsp.sca1b.amazontrust.com
CRL Distribution Point: http://crl.sca1b.amazontrust.com/sca1b.crl

Check the revocation status for certificate staging.live.joymo.no

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for staging.live.joymo.no

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 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

staging.live.joymo.no

Other certificates including the domain name joymo.no

(limited to 100 certificates)
colaborador.limatransvial.com
elz.ai
www.williswcy.com
staging.live.joymo.no
admin.spaceknow.com
shoplystr.app
joymo.no
auth.cloud.orchesty.io
shakibdotme.com
www.dameonlaird.com
dev.negociosimples.com.br
app.vdoto2.com
norwaycup.joymo.no
staging.backoffice.joymo.no
identidadcom.com
aoc.orwig.app
genealogy.claytonbridge.dev
screenml.com
staging.arena.joymo.no
md.p0.jar15.joymo.no
glinktest.com
bigmedia.kz
www.niveussports.life
yeledoctor.dermadetect.com
dinamikprimapersada.com
www.threesixtytrailers.com
rivercleaningservices.com
haber.aytemiz.com.tr
turner.struxhub.com
joymo.no
joymo.no
www.tryeat.me
app.mev.cat
vendors.souls.care
joymo.no
pos.easybus.app
tfipunechennai.trustin.app
joymo.no
joymo.no
staging.cloudfunctions.joymo.no
greekbeatsofficial.com
www.sandbox.portal.axesse.co
www.virginia.profit.orderprinting.com
flightschool.swift.co
uno-it-services.co.uk
learning.granadaeditions.com
genealogy.claytonbridge.dev
pixs.app
crisodevelop.tech
www.dsta.sh
linea-pro-5.ipcmobile.com
backoffice.joymo.no
fastsafe-pro.com
devweeklima.com
haber.aytemiz.com.tr
www.jfl-bizpartners-conference.com
recordings.cdn.joymo.no
financeallhands-on.liveevent.co.za
joymo.no
react-store.stackskull.com
getgoing.co.id
norwaycup.joymo.no
nextquestion.net
mybench.net
dev.sommersause.ch
shubhaminds.com
app.transitkingtycoon.com
toshinokyoko.moe
www.mobilize.gq
v2.alanho.work
marty-online.com
unryukai.com
live.staging.joymo.no
c3l.io
faceyoga.fit
api.joymo.no
www.asialing.com
howard.games
www.kaminosoft.info
www.temporalflux.app
www.bartalog.com
vidientuvnpay.vnpay.vn
cloudfunctions.joymo.no
build.yoimo.no
michalis.diblip.com
sildalis.newstodayweb.online
ctrl-c.app
www.exdeck.jp
www.happymatches.com
citizenlab.net
eymir.zeplinx.com
joymo.no
finding-form.space
manager-dev.freshnow.app
auth.bronze.trayn.com
garyheffernan.com
agartha.presar.app
recordings.cdn.joymo.no
arena.joymo.no
pixelbots.io

Certificate

The complete raw certificate details for staging.live.joymo.no in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEApGOgwyREn6UZ+Oj+OOAp
GP+KrRg4XsWLLe9JlZBdYWB5s05yafDeqvqulxXN7E+bl3SmXiu5kG5P8yh8SFH5
j5sJIayKLqDKX9othtOxnyXNg0u40Qnp8CDKy/U0YLUpWgDZI8QPkTUBtVGG6ZH5
1inW8o79inGORdLucYq6Z+6RUtId2Xwbfr8NvS78B2qAfZ0FBnKfHrHKJI3WDAzy
BMUquJH3cTqyK+3iqN3Bzw1EFA6vrDt8N8zP9GdqlBLgxn6P80nlp5qTZHBYnE9N
xsBb12/sZtGpiR18tDBT6GHBfT52zjvBbVCgi1JEhNHNkuHCd/EnceYnKQCJptkJ
dQIDAQAB
-----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 8504273767428348128372368345170029967
 . . . . . . . . [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 'Amazon'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Server CA 1B'
 . . . . . . . . . . . . [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 'Amazon'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-12-05 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-05 12:00:00 +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 'staging.live.joymo.no'
 . . . . . . . . [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 20752210401240854999948368654518985731448062900568394695633906787886961718355636945806374366679506351573758038022477623034490129826199176075563150489971138021245923959239170103139977831073425848862661746905352966384067133055817393367932006455790728406675089261108443472445908569769871198988324696307775289416867834521302680722556369773291349789053453686708840763826943819451002012280921774443241533758250828029896351259397106318066397061012807238417623973990492004665633579751618545616904638850881874992904268698303837995736162592737870260358406220159035974739185669811954562523080583902035663431904662647747473115509
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 59a4660652a07b95923ca394072796745bf93dd0
 . . . . . . . . . . . . . . . . [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)
							b85cdec2c7e6963f95c8b39db0554febcc4dee5c
 . . . . . . . . . . . . . . . . [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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'staging.live.joymo.no'
 . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (52 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://crl.sca1b.amazontrust.com/sca1b.crl'
 . . . . . . . . . . . . . . . . [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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114412.1.2 (digiCertDVCert)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (105 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.sca1b.amazontrust.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://crt.sca1b.amazontrust.com/sca1b.crt'
 . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL 
 . . . . [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)
		00b81da1dab57b105173d1ac1046372c02e2cf9061ea71a5b02b21850324eba4cfe47d6443a591e6a1833784a1a1db896fdf1ee423bcc3a0d478f1e3c397c1a9630753a187814b428d7d7aaf40aa93aac2af2f37ac3ded050f339c872c516307f26838c8e1b09c2deff4dd9c9e0205911a700717860350c0a6a169c3a23a4b3a27c5af393fa363f029b4f3240228886a9f4b5761462f672b779e184ebe17e2c8aae3c0729ad3907f3bcc07611cbc1477b110eb8b7b0a2ebdf280f30091f354fb4f5232cdf099111fa88ee2a34e3e7dd7c6126ca6168df9533ce74ed91dacf1ff36395d69eeac6e94a49fda2cea90041b07fe7d95ea8e98166280872af3ffe584c1