www.nkfco.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:94:70:0f:06:2e:2b:bd:1e:0c:ba:f2:32:81:48:4c:f1:62 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.nkfco.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:94:70:0f:06:2e:2b:bd:1e:0c:ba:f2:32:81:48:4c:f1:62
Serial Number (int): 398959885576673157361128927634024529981794
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: ca:7e:62:f8:4f:8a:ea:1f:ca:7c:f4:b0:b9:57:aa:af:f2:70:32:8d
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b8:8c:49:ee:7a:10:6b:d1:b7:06:fb:b3:9c:67:82:e5:55:6b:60:68
Fingerprint (sha256): ba:9e:1a:b4:b3:56:d3:32:32:43:3f:e9:fb:c0:6e:33:2c:9b:59:72:63:9b:d3:4f:75:c3:35:52:8f:2b:b7:e5

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.nkfco.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.nkfco.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.nkfco.com

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www.nkfco.com
www.armacar.com
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www.nkfco.com
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substance--abuse.com
printermd.com

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIGUTCCBTmgAwIBAgISBJRwDwYuK70eDLryMoFITPFiMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTEwMTMwNzUyMzJaFw0y
MDAxMTEwNzUyMzJaMBgxFjAUBgNVBAMTDXd3dy5ua2Zjby5jb20wggIiMA0GCSqG
SIb3DQEBAQUAA4ICDwAwggIKAoICAQC3akNOlloT+MfVMw/V5q2Wz9hvJeieHFFO
5GBDRcZYxkIkM+am7Gsn6o2HIs7ZXgLWRIKu6UwqqZoDWwByaBmr55+7egP4bccL
yUI0dbxT3FtYEKozzo4UwcMkJUT6AWur2rrHdF2XTK0xPKRsyIr/qplkzgD8oIO9
hH+ghDitbIxK3ttv01DrlDHAXrfw6QvOyoqQr5OQp5+UVKQJ8GMUi1dpOZEmsdQu
aCymgjPvZ5/GS4htB5IVQkZ/jeFclgB4Uv06gb9V1qO3/1UTc+sSLACNG3NgGOrb
yCzFEQAZbi0WxzKudGyRxMs7Ix3z8yQi5+oh4Rgww+BSV2+w4cvltz6di/q1xodZ
DPio09LPuJtaToeuZPPTm3NvkkPpeO+kl60uAX6Bkqh4Z+oHVNnopx35egP/9dt1
6K/ksTErdmyDYZfJslC3i0zLQg6O6vr1ZSZGWnujBuB2uNumUoTTTrGQR4frxWJw
TU9VRRegpaE9x4LegLonazU8BES9NSOXJ/rsEckqfAg07+kZ6poWrPS2RbUkqp/p
UyubSk1vO2KOD4UPop7nO8kJ6qnFObsbHsQflV13uoDJSW/KxKl/8tCewRuunOYa
PhhNDgoH0NL9jySF/Lql+tSf9H+x5MjIbIbsDhLMCs6x+m3qGhvxo4InNQgWS1wt
tkNbB1BHCQIDAQABo4ICYTCCAl0wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG
CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTKfmL4
T4rqH8p89LC5V6qv8nAyjTAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86js
oTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14
My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14
My5sZXRzZW5jcnlwdC5vcmcvMBgGA1UdEQQRMA+CDXd3dy5ua2Zjby5jb20wTAYD
VR0gBEUwQzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYa
aHR0cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEDBgorBgEEAdZ5AgQCBIH0BIHx
AO8AdgBep3P531bA57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAAAW3EUbVtAAAE
AwBHMEUCIQC0HEVSRCfPVM9EEDMwRx+LZ7RmDMxmdSlGAOtr/d4JlwIgfLDycp9z
9oevJ3X0xYQ3Y8vf07s+FKIUUQAKbdsAL9YAdQCyHgXMi6LNiiBOh2b5K7mKJSBn
a9r6cOeySVMt74uQXgAAAW3EUbVXAAAEAwBGMEQCIA4WbsNmqEo6/hWEtIk3Jret
OpTws2cla5oPsPMHZEeAAiB92PCMhRMyLj0dV2S12LpO83Oc0Css5wJRjVVX9gR6
PzANBgkqhkiG9w0BAQsFAAOCAQEAA+zZ/IzLg/z87mTVyIL4QTVb+nPfdo+PRuML
BpbejQW+vlpl77U+yKWPLApNmAieT20UKpB68lpoI3KqMaQIwANpmGO2IWs2IFF4
zZSoVaUrnTTLIsmtQM4KCqmJK0w6DYhk14ZaQV1kWY72NV9Ihz43SnMAOv34DK/g
QHlG4K546BMGlEqBQpYIUXk6peaB0Anklc8p+lMyenPPf3sbKieYwXmk6jinxvXP
mu08gD6/OzeKskR5YVfujuxvmpNkwsqBvT0Ny8crbYjv6qmQDpdbj1OwT20wkzEF
8dPZ5JtgAPOmlLGZ7TTmOJqku/+P02tPrYKM503FuOW+6586sQ==
-----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 398959885576673157361128927634024529981794
 . . . . . . . . [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 2019-10-13 07:52:32 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-11 07:52:32 +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.nkfco.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 748268281958034366637025197022726249596029062281206929206857297133151482249066374420521884678282395743015691665924836259860786337136129186629540491918739906833197390092984140869934422811857443430747919773607581155450691391582690538539846856178205410756046224142426489698166926773665893091890385928054052531690856455458582008505653898654686134683055480295607518547864479006150375872935085706354982450564619279821387850322862716672437699157596685392256810764897974459826398189992058654703910863471323237846347179784052479686298255978601325282494818369942775831772378109360951195034362272590276138012725878920352766683165666005716583417127563086576858225895144124473493329071771384833034285679390513443186144109703183288062259672222831871923195955276298724505732242924990768017626787878488419657975579252430818252875883343808157693439540543112946534491612433450489843556556792021106438887698285159628713905387800275437300034512545041986269121390531707094352277756797196510285372349715570734051164774751915302939077849927054751823992820813429307217191014817662216229224749467665137985011267942006849399744028093207745624623030428943263893955049148397820058612825661525284051615801984548569606872412121478498202739543822166829831354861321
 . . . . . . . . . . . . . . . . . . . . [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)
							ca7e62f84f8aea1fca7cf4b0b957aaaff270328d
 . . . . . . . . . . . . . . . . [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.nkfco.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016dc451b56d0000040300473045022100b41c45524427cf54cf44103330471f8b67b4660ccc6675294600eb6bfdde099702207cb0f2729f73f687af2775f4c5843763cbdfd3bb3e14a21451000a6ddb002fd6007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016dc451b557000004030046304402200e166ec366a84a3afe1584b4893726b7ad3a94f0b367256b9a0fb0f30764478002207dd8f08c8513322e3d1d5764b5d8ba4ef3739cd02b2ce702518d5557f6047a3f
 . . . . [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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