www.umamo.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:fe:66:3b:9d:34:e9:76:6b:07:ac:e5:ce:1a:d1:94:2d:87 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=www.umamo.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:fe:66:3b:9d:34:e9:76:6b:07:ac:e5:ce:1a:d1:94:2d:87
Serial Number (int): 347904469782814250023459009922664133569927
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 67:2a:92:e2:ac:b8:62:4a:81:e7:de:44:06:24:cb:98:1b:c7:35:f3
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): f9:17:f5:f5:48:d5:e3:52:2f:70:44:db:52:d9:28:36:d0:7e:9d:a8
Fingerprint (sha256): ff:a9:ec:aa:23:a2:e4:76:94:ef:cd:6d:bb:2c:98:74:f9:e6:32:c1:e7:f9:c2:3b:4b:1a:1a:ea:fa:84:30:44

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 www.umamo.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.umamo.com

Public Key Algorithm

RSA

Key Size

4096

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

www.umamo.com

Other certificates including the domain name umamo.com

(limited to 100 certificates)
umamo.com
www.alicia.boston
umamo.com
umamo.com
www.umamo.com
www.ubimi.com
www.umamo.com
umamo.com
www.umamo.com
www.umamo.com
umamo.com
umamo.com
www.umamo.com

Certificate

The complete raw certificate details for www.umamo.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGUzCCBTugAwIBAgISA/5mO5006XZrB6zlzhrRlC2HMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTExMjQxMTEyNDZaFw0y
MDAyMjIxMTEyNDZaMBgxFjAUBgNVBAMTDXd3dy51bWFtby5jb20wggIiMA0GCSqG
SIb3DQEBAQUAA4ICDwAwggIKAoICAQC4H1JMwXhHJxIsRCevPi+uaweiZqqK1d87
dTUvINUOrbT1/ztJMh9mEPCUF3TyUmWCGqKVPxyKQhS0PHNMEzYW1ZtT5hbf3CZt
26YIE7lLelJahYpBtFsBIwx1yWQqaZmIM15vsdiRwSU5frXyd2oyFDxm6ZBKY7Pz
6yPfVZTWgfuxOwREORhE6Cx6p2iTuJCnYqyw+TFt0dnKzSosOl6zmFim8FyoBWV5
wt8ti/9IWAo+TdgP1XqRNc0JapBseCRVvi0Wm6i4v8rlCVScC3kmZtsSrvkWBy3F
ukXPQuWx9bmdSTqv/8aHS9ixGNy99dwbQPhmmX9bp7nRzeFHSjzf0/zAgLXJkEYO
Q4jFAdKJY0L/TEUYripFeTPEvm+GzRiGCdTMxBjvfW3GU2ONU2ofG3weWzl6J/+b
ZN+J2u0h8W73JOlfCtuZRRme+U3gB9ge2sm8+p+Yr8pzYrYpNWKH9HgaVZNlUy3E
Ym2fSd1ZFQBlg/HDEm3wz2MMuxDmlT+Awew5hllYXeCLkf4wg40s2CkASmTMe278
NFap2VldPR27AgJraGLGlljqrgBaPTwxAh8gjihCdToch9IGfKPtC3TfKWHPKEUs
fkYurtO4xyHTT6Kd2SgLXwEAXa3/nM40P6Fa6LdhEmuYhBAHTY+0UrbtJViSwcAn
86imoSRNgwIDAQABo4ICYzCCAl8wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG
CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBRnKpLi
rLhiSoHn3kQGJMuYG8c18zAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86js
oTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14
My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14
My5sZXRzZW5jcnlwdC5vcmcvMBgGA1UdEQQRMA+CDXd3dy51bWFtby5jb20wTAYD
VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa
aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEFBgorBgEEAdZ5AgQCBIH2BIHz
APEAdgAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToaadOiHAAAAW6dVCHHAAAE
AwBHMEUCIQD8MvVhVttS0ZNZG3QXqdtmeNpF27tA9cpqdAw18IdD5wIgKDIR7ziG
uI2DqDqnsub0Ki+2sbcSIlwO9UPdzdg4CrAAdwBvU3asMfAxGdiZAKRRFf93FRwR
2QLBACkGjbIImjfZEwAAAW6dVCMAAAAEAwBIMEYCIQCulxaCp4d1tSqQaRhHSdAX
KiVAVHbHnISUOuGaCAdp9AIhANMynsA/AQbSsc1lkNkSWxW8F5xuXi8BN8+UxMp5
YMz9MA0GCSqGSIb3DQEBCwUAA4IBAQBzTKpXgKuGqWHfvSUYiiWr36mcWXdPPx7E
yZqKn4Po1o6x0ougNN8pj0ad9SCwUiZGaGDcMPeKJMLUKLN3hyqpgc7lqO4F2Nfk
wXoRbMk+mplRPTGtLOHb8FGxlBdDq0U1fzqWPoeu+3rdl5pRBp7LIbZg3W5Qfevy
FBytLBbZsmvvcZ0FPxu2hVe90J/QBvHZyTB4W6KhXzpmMTIFuCFfDu0GBRxxdjj0
qFGBoAqsrOIm+ace96FX4jBAkdceUg86qsZlR7jO/CmQX5DorGwg7W4766hMYni/
/cJ8z/p8yI82eaXwIaPpoEOrgLqEpHaxKs3AY9EULgD+25pAyc1h
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 347904469782814250023459009922664133569927
 . . . . . . . . [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 2019-11-24 11:12:46 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-22 11:12:46 +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 'www.umamo.com'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 751153651114050809926446787730919155531110710700676319687625197526918700075286747887684210538351287941405918660531569562216606239984790969029505168354214786453990328291013074166438733820563918212801620964176187444127140097205974669255514639839216209513692266482587139978786448216082315692023294705663239154378008597640259703781652576732419709426215184200515296892979632552495277494610631680460629769430531956350903102373691833865489253195768452961083216235747264943932028042736417252676532594871784664044463688684119757575154571289131314213992280888709505049656715618477362718524124768065178012999301508613779526398149231182124561495802218582296243738423179081515514034895555161876924578948909683600065721664502262298465918606246933668703617334468292344759621245470240540074742487907045948577030586062098426715335453562635479082544340957050779177410771131126085335559993388361145723845466065885470751839932285508528222435348115869681097499185045988152414532616939473316168513565137727903035503896187206764157729143480315593685406526568284791474146294617391014044383756112624498965483351924749304535064754623778035144673283565720514747626546394611156531228093066526821389855264092395308206524635208047695837551464539338281106993859971
 . . . . . . . . . . . . . . . . . . . . [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)
							672a92e2acb8624a81e7de440624cb981bc735f3
 . . . . . . . . . . . . . . . . [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 'www.umamo.com'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f100760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016e9d5421c70000040300473045022100fc32f56156db52d193591b7417a9db6678da45dbbb40f5ca6a740c35f08743e70220283211ef3886b88d83a83aa7b2e6f42a2fb6b1b712225c0ef543ddcdd8380ab00077006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d9130000016e9d5423000000040300483046022100ae971682a78775b52a9069184749d0172a25405476c79c84943ae19a080769f4022100d3329ec03f0106d2b1cd6590d9125b15bc179c6e5e2f0137cf94c4ca7960ccfd
 . . . . [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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