kit.movember.wavy.co

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:c3:93:40:78:63:76:81:00:89:64:a6:be:91:c5:52:80:3a 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=kit.movember.wavy.co

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:c3:93:40:78:63:76:81:00:89:64:a6:be:91:c5:52:80:3a
Serial Number (int): 327887650609012484889751558479004560425018
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: be:45:96:2f:f9:57:f2:d2:cd:a7:40:2e:7f:e1:21:38:4e:07:eb:27
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b6:e9:fd:40:bb:66:e2:97:4c:38:cf:1a:b3:fc:22:15:e6:24:6e:95
Fingerprint (sha256): 83:70:52:8f:5c:df:a4:ff:3f:61:06:9c:9a:07:53:45:f0:e9:bf:30:55:47:c6:a2:08:f8:21:f2:1f:29:1d:aa

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 kit.movember.wavy.co

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for kit.movember.wavy.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

kit.movember.wavy.co

Other certificates including the domain name wavy.co

(limited to 100 certificates)
api.wavy.co
x.wavy.co
share.wavy.co
proudbuilders.ca
landing.wavy.co
www.wavy.co
aide.wavy.co
w.globalmarketingsummit.org
offre-web.wavy.co
wavy.co
www.wavy.co
www.wavy.co
dash.mafiasn.com
wavy.co
wavy.co
client.wavy.co
vivienda.app
kit.wavy.co
wavy.co
wavy.co
concours.wavy.co
concours.wavy.co
wavy.co
www.wavy.co
www.wavy.co
robbyv.dev
concours.wavy.co
mcb2019.wavy.co
magazine.wavy.co
delivery.5starbuild.net
magazine.wavy.co
client.wavy.co
kit.movember.wavy.co
client.wavy.co
dev.sadaqas.com
dev.wheeltheworld.travel
x.wavy.co
kit.wavy.co
fun.wavy.co
offre-web.wavy.co
x.wavy.co
rhino.click
wavy.co
landing.wavy.co
landing.wavy.co
concours.wavy.co
concours.wavy.co
landing.wavy.co
kit.wavy.co
www.wavy.co
aide.wavy.co
client.wavy.co
appreferral.propease.co
r.wavy.co
wavy.co
wavy.co
offre-web.wavy.co
landing.wavy.co
www.wavy.co
app.wavy.co
share.wavy.co
app.developertoolkit.io
concours.wavy.co
wavy.co
concours.wavy.co
share.wavy.co
client.wavy.co
share.wavy.co
landing.wavy.co
wavy.co
wavy.co
wavy.co
wavy.co
salon.wavy.co
kit.wavy.co
concours.wavy.co
wavy.co
compare-shortcuts.wavy.co
wavy.co
dev.sadaqas.com
offre-web.wavy.co
x.wavy.co
kit.wavy.co
share.wavy.co
aide.wavy.co
mcb2019.wavy.co
concours.wavy.co
mcb2019.wavy.co
freddysapp.link
x.wavy.co
kit.movember.wavy.co
share.wavy.co
api.wavy.co
api.welcome.wavy.co
concours.wavy.co
www.wavy.co
assets.ankuragrawal.xyz
vivienda.app
share.wavy.co
app.wavy.co

Certificate

The complete raw certificate details for kit.movember.wavy.co in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvqOrfNgyF4hiSJPc7mMn
hM4gi4Cxk/gi+UI4/HORL00Avc6zjUrboRETwwTOcuxHtgNpY+bt6FfUCMXAG+et
Bkrr9eiHHFXzKuD8vbddLbp87v8y0tkOYrexzm3j8YLTyzwkld5iDzlB03W30Oo5
5mDUbJVn4vYAeay+v1CKhpQ3VJZ97qAMI5wtmC4UvsB5E/xq6H0GsMIL/fWWJMPu
pCuHRDCOnVkrhf9SkbQsPkkrtDCwsey+Z0mcSBL64Q+SVLp90swT8uG96cvWoLtT
9FzRv3ShPLdvPhfzVJ2GdSWRFgOp7Fuaox+5k8OdhQ/38sxTAL3gFxT3z3i8UPEv
IQIDAQAB
-----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 327887650609012484889751558479004560425018
 . . . . . . . . [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 2019-12-29 23:03:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-28 23:03:55 +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 'kit.movember.wavy.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 24065986566337048286290887752716344070626880096415860574408676691110142652848050433779507437974232478745018698093782024038530522477838692188563933415583314204781010456062005237645282285545345526875363960595652860440713609614518067476779094222079598201997472884963594987733582576597411824941437384741585535467787608279727283487028884359918715035182151753039696641085370228300645326027005181995591176411565307274475748561556115186036373164940588861179136111460800000452686568884740308756666930197023711161950857744594198375270951267401523044362903651723912043382500888693380327261266884138478680659289094374059074989857
 . . . . . . . . . . . . . . . . . . . . [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)
							be45962ff957f2d2cda7402e7fe121384e07eb27
 . . . . . . . . . . . . . . . . [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 (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kit.movember.wavy.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f541dc7ce00000403004630440220150e0e03c488071fd862c0fe553e12bc6811428a66370b5dc3ae9a5bd44a504f02205668c4995d4d7f1ee5f79213653f1f9ae18108a9c2a30ff0470d7483c1ea3e3f0077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016f541dc856000004030048304602210097cc822b9192d04a2e8f0f4a0568dfb2be9162f42ea952dead9e690ccd0ba1cd022100e7130a623ecb558f927fb15a2b4b8cc5e2a974585b67101667d777fe92be89fc
 . . . . [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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