pushstart.com.br
Issued by Amazon
About this certificate
This digital certificate with serial number 0d:c1:55:dd:c3:18:a9:8f:2a:ca:c0:f8:2f:09:e0:43 was issued on by Amazon.
With 2 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=pushstart.com.br
Amazon
Organization:
Amazon
Organization unit: Server CA 1B
Organization unit: Server CA 1B
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 0d:c1:55:dd:c3:18:a9:8f:2a:ca:c0:f8:2f:09:e0:43Serial Number (int): 18283818813520745980197057343850668099
Serial Number lenght: 124 bits, 16 octets
SubjectKeyId: aa:26:30:54:a1:a8:b2:a7:9d:3b:0d:6d:02:ab:6d:2c:69:63:2b:bd
AuthorityKeyId: 59:a4:66:06:52:a0:7b:95:92:3c:a3:94:07:27:96:74:5b:f9:3d:d0
Fingerprint (sha1): d8:a9:61:58:9a:fb:0f:8b:ff:46:b2:32:0d:ce:14:98:e6:4c:9e:10
Fingerprint (sha256): 5d:2a:ec:d5:bd:13:d4:8e:d2:1a:cb:c3:b9:80:d2:5d:fc:32:35:68:ac:e0:2b:14:c6:d2:53:01:40:ba:92:73
Issuing Certificate URL: http://crt.sca1b.amazontrust.com/sca1b.crt
Revocation information
OCSP Server: http://ocsp.sca1b.amazontrust.comCRL Distribution Point: http://crl.sca1b.amazontrust.com/sca1b.crl
Check the revocation status for certificate pushstart.com.br
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for pushstart.com.br
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
10 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
pushstart.com.br
*.pushstart.com.br
*.pushstart.com.br
Other certificates including the domain name pushstart.com.br
(limited to 100 certificates)
dbtesser.hml.pushstart.com.br
dbtesser.hml.pushstart.com.br
dev.pushstart.com.br
dbtesser.hml.pushstart.com.br
pushstart.com.br
pushstart.com.br
traineefeitoparavoce.pushstart.com.br
dbtesser.hml.pushstart.com.br
dev.pushstart.com.br
boo.pushstart.com.br
nesplay.pushstart.dev
app.orangedrivingschool.co.za
jarkevaajoukkoliikennetta.fi
dev.pushstart.com.br
gamepascoa.pushstart.com.br
www.antoinegermanique.com
www.snapagenda.com
npm.pushstart.com.br
pushstart.com.br
dbtesser.hml.pushstart.com.br
pushstart.com.br
www.cozymart.net
jarkevaajoukkoliikennetta.fi
criptoquiz.com.br
pushstart.com.br
ambiguities.app
app.qtive.se
dbtesser.dev.pushstart.com.br
pushstart.com.br
dev.auth.healthcarewings.com
player-staging.screenlime.io
hackerrangers.com.br
pushstart.com.br
dev.pushstart.com.br
dbtesser.hml.pushstart.com.br
nesplay.pushstart.dev
unidos.pushstart.com.br
dbtesser.dev.pushstart.com.br
pushstart.com.br
www.oyunver.online
prepare-yourself.szabonorbert.me
criptoquiz.com.br
unidos.pushstart.com.br
ijatsr.org
criptoquiz.pushstart.com.br
traineefeitoparavoce.pushstart.com.br
dbtesser.hml.pushstart.com.br
dev.pushstart.com.br
dbtesser.hml.pushstart.com.br
pushstart.com.br
pushstart.com.br
traineefeitoparavoce.pushstart.com.br
dbtesser.hml.pushstart.com.br
dev.pushstart.com.br
boo.pushstart.com.br
nesplay.pushstart.dev
app.orangedrivingschool.co.za
jarkevaajoukkoliikennetta.fi
dev.pushstart.com.br
gamepascoa.pushstart.com.br
www.antoinegermanique.com
www.snapagenda.com
npm.pushstart.com.br
pushstart.com.br
dbtesser.hml.pushstart.com.br
pushstart.com.br
www.cozymart.net
jarkevaajoukkoliikennetta.fi
criptoquiz.com.br
pushstart.com.br
ambiguities.app
app.qtive.se
dbtesser.dev.pushstart.com.br
pushstart.com.br
dev.auth.healthcarewings.com
player-staging.screenlime.io
hackerrangers.com.br
pushstart.com.br
dev.pushstart.com.br
dbtesser.hml.pushstart.com.br
nesplay.pushstart.dev
unidos.pushstart.com.br
dbtesser.dev.pushstart.com.br
pushstart.com.br
www.oyunver.online
prepare-yourself.szabonorbert.me
criptoquiz.com.br
unidos.pushstart.com.br
ijatsr.org
criptoquiz.pushstart.com.br
traineefeitoparavoce.pushstart.com.br
Certificate
The complete raw certificate details for pushstart.com.br in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIEijCCA3KgAwIBAgIQDcFV3cMYqY8qysD4LwngQzANBgkqhkiG9w0BAQsFADBG MQswCQYDVQQGEwJVUzEPMA0GA1UEChMGQW1hem9uMRUwEwYDVQQLEwxTZXJ2ZXIg Q0EgMUIxDzANBgNVBAMTBkFtYXpvbjAeFw0xOTAxMDcwMDAwMDBaFw0yMDAyMDcx MjAwMDBaMBsxGTAXBgNVBAMTEHB1c2hzdGFydC5jb20uYnIwggEiMA0GCSqGSIb3 DQEBAQUAA4IBDwAwggEKAoIBAQDQwo5TT5O5EAHfV3yXf6zvOUHSJb2J2vT1HVD0 mTudX7VKIHtj2clsV3OwTpVTO5fICO28xmLB06vFnqXkkOgZ8eUYhG0vHmptz5NN FqMWv1B25ubOuE9EM0RjjWB+NVnHdSZtHBJDO7r7JDvwzzEyuZiZiAVE3auUpMgg HsbwWkul2Jyfi9q5xdyrNAFC3TUyKzuIwRU39kKKbQi1ORCXnW6jZlu0F+RbE4vl JgC+S46kNKX7a/vUgTvoP/4qCANEtE5J6u4tqSJvigYrvfPFKQeN5Bon879D+K68 /+4ywzvMttqqfEKctrO+vD8Lw/7IwOcsb0yxA9jPTKE/Pv5LAgMBAAGjggGdMIIB mTAfBgNVHSMEGDAWgBRZpGYGUqB7lZI8o5QHJ5Z0W/k90DAdBgNVHQ4EFgQUqiYw VKGosqedOw1tAqttLGljK70wLwYDVR0RBCgwJoIQcHVzaHN0YXJ0LmNvbS5icoIS Ki5wdXNoc3RhcnQuY29tLmJyMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwOwYDVR0fBDQwMjAwoC6gLIYqaHR0cDovL2NybC5z Y2ExYi5hbWF6b250cnVzdC5jb20vc2NhMWIuY3JsMCAGA1UdIAQZMBcwCwYJYIZI AYb9bAECMAgGBmeBDAECATB1BggrBgEFBQcBAQRpMGcwLQYIKwYBBQUHMAGGIWh0 dHA6Ly9vY3NwLnNjYTFiLmFtYXpvbnRydXN0LmNvbTA2BggrBgEFBQcwAoYqaHR0 cDovL2NydC5zY2ExYi5hbWF6b250cnVzdC5jb20vc2NhMWIuY3J0MAwGA1UdEwEB /wQCMAAwEwYKKwYBBAHWeQIEAwEB/wQCBQAwDQYJKoZIhvcNAQELBQADggEBAAf4 Rm6RPWHho+GbV8kJqqs+eiJMv2GV7E0J9LeZHSjKc4ekhWF1TosCOt+o5Z6AFXAi QTNCsM99kWBlIJNx6gb7OlcefIN45Y2t8LjVQAkpbQp7M74+TJHbIOdmvr95RLa5 CmP2KEbKymfCwz5NRQ7+XXgTWTJL/oFcBevlyhGIlc4q9W4yFN7r+tl89qsE2G7D v1vHdWJLJBx3Jq1uVLxkEVs+7zQyKWdLXM2S8YH06j+zcLD7hsWadS4ldMY2PdV4 /k9wEvS1JKatmjkKDSdN4eyamoshXVPkH6xrdUdXpNwaJi/X43LpS+yPAwLk9gsZ 1ChaZAYV7a6U4ISkUP8= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0MKOU0+TuRAB31d8l3+s 7zlB0iW9idr09R1Q9Jk7nV+1SiB7Y9nJbFdzsE6VUzuXyAjtvMZiwdOrxZ6l5JDo GfHlGIRtLx5qbc+TTRajFr9QdubmzrhPRDNEY41gfjVZx3UmbRwSQzu6+yQ78M8x MrmYmYgFRN2rlKTIIB7G8FpLpdicn4vaucXcqzQBQt01Mis7iMEVN/ZCim0ItTkQ l51uo2ZbtBfkWxOL5SYAvkuOpDSl+2v71IE76D/+KggDRLROSeruLakib4oGK73z xSkHjeQaJ/O/Q/iuvP/uMsM7zLbaqnxCnLazvrw/C8P+yMDnLG9MsQPYz0yhPz7+ SwIDAQAB -----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 18283818813520745980197057343850668099 . . . . . . . . [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 'Amazon' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Server CA 1B' . . . . . . . . . . . . [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 'Amazon' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-01-07 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-07 12:00:00 +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 'pushstart.com.br' . . . . . . . . [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 26353506551886264725016816520856615675675863793925227011203936465362755362451264745584561951232656745035437766974884739272712316618698555826724827493561748288864202346851976718353915796678717286041150195407545273009539544212642532030408133395658054167528971529942465969132215759752854119990104919547279925394206804462756118292296095906779812138566633241750955974846919126471102274185054614966184519197198629704144884553500019128311181833295932703344807689196863548169510986832343850108591502282247996178635357879075913586989657055778282961758604852343695296349953508779465130143445680680275888066692350162772420394571 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 59a4660652a07b95923ca394072796745bf93dd0 . . . . . . . . . . . . . . . . [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) aa263054a1a8b2a79d3b0d6d02ab6d2c69632bbd . . . . . . . . . . . . . . . . [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 (40 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'pushstart.com.br' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.pushstart.com.br' . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (52 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.sca1b.amazontrust.com/sca1b.crl' . . . . . . . . . . . . . . . . [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 (25 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114412.1.2 (digiCertDVCert) . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (105 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.sca1b.amazontrust.com' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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://crt.sca1b.amazontrust.com/sca1b.crt' . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.3 (CT Precertificate Poison) . . . . . . . . . . . . . . . . . . . . [c:0|t:1|false] BOOLEAN true . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (2 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:5|false] NULL . . . . [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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