nestoria.ae
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 03:88:88:5e:08:cd:0c:cf:22:cf:ac:d4:01:5e:aa:42:2b:33 was issued on by Let's Encrypt.
With 7 subject alternative names this certificate can be used to secure multiple fqdn's. 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=nestoria.ae
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:88:88:5e:08:cd:0c:cf:22:cf:ac:d4:01:5e:aa:42:2b:33Serial Number (int): 307796522958364836180194103733691414096691
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: c9:30:da:50:2e:58:cb:9f:c0:a3:93:8b:d0:88:98:0a:2e:d4:d2:6f
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): eb:5a:a0:05:54:a9:e5:8c:c5:98:4b:fd:9d:5f:f3:56:3d:30:89:bb
Fingerprint (sha256): 4a:60:28:9a:9b:27:71:d0:19:60:e9:20:50:0e:42:31:c0:6d:63:3c:38:d7:48:0d:72:be:69:77:4b:d2:cf:a0
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate nestoria.ae
7
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for nestoria.ae
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
8 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
api.nestoria.ae
nestoria.ae
rss.nestoria.ae
s.nestoria.ae
share.nestoria.ae
tracking.nestoria.ae
www.nestoria.ae
nestoria.ae
rss.nestoria.ae
s.nestoria.ae
share.nestoria.ae
tracking.nestoria.ae
www.nestoria.ae
Other certificates including the domain name nestoria.ae
(limited to 100 certificates)
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
s.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
s.nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
s.nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
nestoria.ae
amp.nestoria.ae
amp.nestoria.ae
nestoria.ae
s.nestoria.ae
nestoria.ae
Certificate
The complete raw certificate details for nestoria.ae in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIFZTCCBE2gAwIBAgISA4iIXgjNDM8iz6zUAV6qQiszMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xNzExMjQwODI1MzJaFw0x ODAyMjIwODI1MzJaMBYxFDASBgNVBAMTC25lc3RvcmlhLmFlMIIBIjANBgkqhkiG 9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvDskoFr+7IBFD8An80+CVN0+qbnvo2AcfZrR 2emA3TJr/qaN6UI00dpb/cdYg8ErXZF7oGezFrWmTj3DF7qu5yCe01ulVU6GmljB Lzot/j+vzkrC60p0ZTsSbPnSs83mSndxqCQ6XOVoXoyiVGs58nSnX55odXvZS7x0 oI2g9ZBa7E/Wj9zZmQTZA/VAMPCHqCIM1wNVDF4dTbOPr+iIRxbrsDAjEd3fpk9P WGobbg5xkFs1fHXmblhwD0Uh3+QaZl2EeVHeIFv7RanXV3QgWuTcILPGSl5hEigO JTYvd37eACn/HMjcsLOfsxQHdB7WpV8xd2WqxqRwn7IYFttdbQIDAQABo4ICdzCC AnMwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcD AjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTJMNpQLljLn8Cjk4vQiJgKLtTSbzAf BgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv86jsoTBvBggrBgEFBQcBAQRjMGEw LgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmludC14My5sZXRzZW5jcnlwdC5vcmcw LwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0LmludC14My5sZXRzZW5jcnlwdC5vcmcv MIGBBgNVHREEejB4gg9hcGkubmVzdG9yaWEuYWWCC25lc3RvcmlhLmFlgg9yc3Mu bmVzdG9yaWEuYWWCDXMubmVzdG9yaWEuYWWCEXNoYXJlLm5lc3RvcmlhLmFlghR0 cmFja2luZy5uZXN0b3JpYS5hZYIPd3d3Lm5lc3RvcmlhLmFlMIH+BgNVHSAEgfYw gfMwCAYGZ4EMAQIBMIHmBgsrBgEEAYLfEwEBATCB1jAmBggrBgEFBQcCARYaaHR0 cDovL2Nwcy5sZXRzZW5jcnlwdC5vcmcwgasGCCsGAQUFBwICMIGeDIGbVGhpcyBD ZXJ0aWZpY2F0ZSBtYXkgb25seSBiZSByZWxpZWQgdXBvbiBieSBSZWx5aW5nIFBh cnRpZXMgYW5kIG9ubHkgaW4gYWNjb3JkYW5jZSB3aXRoIHRoZSBDZXJ0aWZpY2F0 ZSBQb2xpY3kgZm91bmQgYXQgaHR0cHM6Ly9sZXRzZW5jcnlwdC5vcmcvcmVwb3Np dG9yeS8wDQYJKoZIhvcNAQELBQADggEBAAA6952VgptrNnWVP3wBILrtzqygwXm/ pHofUeHAP4PHkFcVhvk4nTZlHHodsy7qNBsmL/a3v0/NTFAwKoTxxl+owO3wLADg vFcLTh9nnXq+zmVzIJm+19r2aUF5zMKEKL1UUeVimWIHmJqjzHufth7ui+ixQHDp GoorJA6Hb7tZK1kK3QJq1UeQPXDA5LjetxNMonhytk6OlXs5SC/emYKmnU1eEw3w of9kfksB/KkwbLgf3mtOXXRLX+1dtxINpIa3lYuT053IPfgACNscV5EbM1Go3lli dSfOoVeNauCM9IIZhLhaeZgBVQ0K/oWXCdgexXNslUTvhjcxBCGm3PE= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvDskoFr+7IBFD8An80+C VN0+qbnvo2AcfZrR2emA3TJr/qaN6UI00dpb/cdYg8ErXZF7oGezFrWmTj3DF7qu 5yCe01ulVU6GmljBLzot/j+vzkrC60p0ZTsSbPnSs83mSndxqCQ6XOVoXoyiVGs5 8nSnX55odXvZS7x0oI2g9ZBa7E/Wj9zZmQTZA/VAMPCHqCIM1wNVDF4dTbOPr+iI RxbrsDAjEd3fpk9PWGobbg5xkFs1fHXmblhwD0Uh3+QaZl2EeVHeIFv7RanXV3Qg WuTcILPGSl5hEigOJTYvd37eACn/HMjcsLOfsxQHdB7WpV8xd2WqxqRwn7IYFttd bQIDAQAB -----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 307796522958364836180194103733691414096691 . . . . . . . . [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 2017-11-24 08:25:32 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-02-22 08:25:32 +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 'nestoria.ae' . . . . . . . . [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 23761965869315535993897945839905544268225299458947405567139264268899671667959144848110603850168989770555801728605111497557919211103055271720530868646477703816734887761547751543618490763527969466062393291208346068314096421574901438108333285902915245248348754482559218020325111413132108378997641645436142528323229301400175135054432011108709110845208147845643059947439185436843657299867507390288755684588533539071475791021049209279794524827456891050764991325504400470822938614022793911945688407849819637622226463483742220482836569663125604641179607731869907363003878313891738169669681001253413854834145988583146867350893 . . . . . . . . . . . . . . . . . . . . [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) c930da502e58cb9fc0a3938bd088980a2ed4d26f . . . . . . . . . . . . . . . . [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 (122 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'api.nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'rss.nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 's.nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'share.nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'tracking.nestoria.ae' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.nestoria.ae' . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [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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