www.du4.co

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:ab:af:22:b4:21:35:01:51:24:bf:77:1b:be:a0:57:8b:92 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.du4.co

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:ab:af:22:b4:21:35:01:51:24:bf:77:1b:be:a0:57:8b:92
Serial Number (int): 319757937629581429971913607430802201086866
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: d3:16:a1:04:fc:09:ef:eb:b1:d0:23:26:8d:83:7b:a8:b1:e7:ef:6f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 11:86:79:c6:e2:21:26:06:7c:ea:72:7b:1d:e3:f3:ae:a0:2f:a8:65
Fingerprint (sha256): 81:b8:6e:8c:5a:d7:c2:d1:9d:4c:0f:6b:bc:a3:e0:c3:10:41:d0:a5:5c:78:c2:61:47:ea:cb:98:4d:f8:73:ee

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.du4.co

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.du4.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

www.du4.co

Other certificates including the domain name du4.co

(limited to 100 certificates)
www.du4.co
www.du4.co
new.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
new.du4.co
www.du4.co
new.du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
du4.co
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www.du4.co
railxtech.du4.co
du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
www.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
du4.co
du4.co
biden.du4.co
www.du4.co
du4.co
www.du4.co
aarmembers.du4.co
new.du4.co
biden.du4.co
railxtech.du4.co
new.du4.co
du4.co
www.du4.co
www.du4.co
www.du4.co
www.du4.co
aarmembers.du4.co

Certificate

The complete raw certificate details for www.du4.co in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFTDCCBDSgAwIBAgISA6uvIrQhNQFRJL93G76gV4uSMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA2MDIxNzAyNDJaFw0x
OTA4MzExNzAyNDJaMBUxEzARBgNVBAMTCnd3dy5kdTQuY28wggEiMA0GCSqGSIb3
DQEBAQUAA4IBDwAwggEKAoIBAQCegkr6vf0swmIsxwCN7JSk53Ig770vR0BUPqMz
9ojmvYw+m74rHLkGtA6PyYv5imsgjajJNHXSwBNQ5l7K5/tRybnPrtS9qdjneZEQ
WgxkPkXUBSX4vYl6JAiABU8EZ24SpotzjZniWsJAa5keezUMEtBF3nJA1S7VXHkC
Rpd5njbz89SeCH04DoIl3c8KplWYnVB3jiMb1R4yhhFHm1Rk7whkcZJVCrvMjb+9
LNWZOfcOKasm5cbnPT0kk2c+ziOUQwBFPUjHeqIjEHJgmDPpA69Q7QVP1MeEEvfm
vbHNILBID999wKfipA8Kmse1Y4yCk9AxGlre7plhIfVF6WNHAgMBAAGjggJfMIIC
WzAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYwFAYIKwYBBQUHAwEGCCsGAQUFBwMC
MAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFNMWoQT8Ce/rsdAjJo2De6ix5+9vMB8G
A1UdIwQYMBaAFKhKamMEfd265tE5t6ZFZe/zqOyhMG8GCCsGAQUFBwEBBGMwYTAu
BggrBgEFBQcwAYYiaHR0cDovL29jc3AuaW50LXgzLmxldHNlbmNyeXB0Lm9yZzAv
BggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50LXgzLmxldHNlbmNyeXB0Lm9yZy8w
FQYDVR0RBA4wDIIKd3d3LmR1NC5jbzBMBgNVHSAERTBDMAgGBmeBDAECATA3Bgsr
BgEEAYLfEwEBATAoMCYGCCsGAQUFBwIBFhpodHRwOi8vY3BzLmxldHNlbmNyeXB0
Lm9yZzCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB2AOJpS64m6OlACeiGG7Y7g9Q+
5/50iPukjyiTAZ3d8dv+AAABaxlbm0UAAAQDAEcwRQIgL+QGujtYFxr1ypFAx4VX
VdBLL5jAzwrQhFS2lQTuRQoCIQC5Vg689lCgnK2LaGRPDTMaJL6Fasy6tAaUZ2tO
By76lgB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6KXLcpMMM9OVFR/R4AAABaxlbnVkA
AAQDAEcwRQIgZRrZUENhZ+clr0fT4TWOaElaXmmoY5nIf1gVAxzegyICIQDlV/hj
4LV8AORDVw2Sv/Ro/QzJfaE00VljmdDAiu+lQDANBgkqhkiG9w0BAQsFAAOCAQEA
LZ9Q+mBlgPX6qFr/GbiTIq4NQRRrcoCLd4IpFDvNeE4ovPtl3VvmV51yNsPD4/5/
7iFyzeVi3OTzTs0zPpfMaAJnSxmhH/vkP8XblQ6f+BeyvgAmr924vbYgPsrdRgg7
dBd19sa+U1uYEABc6IR/DPx1eGr9QHckVbe0nqBFWrMNZtj60e3ZpwgA/58NXHmq
Vh8SJVBiHE/dlG6oABxHcn8vpywFRytywBuZq4SCo/hZWdZkBMDaPvFpr7pzG/k2
id5BmbQST/qEDapU3oT3SVT9DXLcpNOdWI03DGu9eQQ4NIsvEAblm9fPJM/oM6Kp
xxnmw2QaDU6OyyK5de0VYQ==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnoJK+r39LMJiLMcAjeyU
pOdyIO+9L0dAVD6jM/aI5r2MPpu+Kxy5BrQOj8mL+YprII2oyTR10sATUOZeyuf7
Ucm5z67UvanY53mREFoMZD5F1AUl+L2JeiQIgAVPBGduEqaLc42Z4lrCQGuZHns1
DBLQRd5yQNUu1Vx5AkaXeZ428/PUngh9OA6CJd3PCqZVmJ1Qd44jG9UeMoYRR5tU
ZO8IZHGSVQq7zI2/vSzVmTn3DimrJuXG5z09JJNnPs4jlEMART1Ix3qiIxByYJgz
6QOvUO0FT9THhBL35r2xzSCwSA/ffcCn4qQPCprHtWOMgpPQMRpa3u6ZYSH1Relj
RwIDAQAB
-----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 319757937629581429971913607430802201086866
 . . . . . . . . [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 2019-06-02 17:02:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-31 17:02:42 +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.du4.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 20009902002590717699483754879650667316102285296072638664576687317827432063367602798906997316769706587319236229464836111953301717280162445144915715620025976960170260387657894541329717259686937722678368142990842831947245715654578162945428633956433720565499860344152837546930917805930175566771383714606096856954675763284598898255455284872527714275422607704006747823143772629000733620162730443798798758884357125631521004529879582074020078033420006773975125423144439626567879758490881572743949281297787868505077258828951677173815490739687392858864639348689572176982813701369478964584709456267735799924175966521289626706759
 . . . . . . . . . . . . . . . . . . . . [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)
							d316a104fc09efebb1d023268d837ba8b1e7ef6f
 . . . . . . . . . . . . . . . . [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 (14 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.du4.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)
							00f0007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016b195b9b45000004030047304502202fe406ba3b58171af5ca9140c7855755d04b2f98c0cf0ad08454b69504ee450a022100b9560ebcf650a09cad8b68644f0d331a24be856accbab40694676b4e072efa96007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016b195b9d5900000403004730450220651ad950436167e725af47d3e1358e68495a5e69a86399c87f5815031cde8322022100e557f863e0b57c00e443570d92bff468fd0cc97da134d1596399d0c08aefa540
 . . . . [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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