a4apps.com

Issued by R3

About this certificate

This digital certificate with serial number 04:90:10:3b:cc:24:fb:28:d5:44:88:47:31:bd:45:15:08:2c was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=a4apps.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:90:10:3b:cc:24:fb:28:d5:44:88:47:31:bd:45:15:08:2c
Serial Number (int): 397471382697644840631098569849025095600172
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: 70:48:4a:a7:c3:40:98:01:0e:70:b5:c0:d8:0f:19:76:68:73:c5:56
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 1d:9f:5e:74:3e:eb:7c:aa:09:88:09:6e:19:c8:5b:cd:99:e8:98:40
Fingerprint (sha256): 3b:09:d0:95:dd:40:c9:b2:85:4b:66:98:3f:37:f6:5f:b5:12:10:1a:41:0a:10:09:08:d2:59:91:7a:31:bc:fd

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate a4apps.com

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for a4apps.com

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

a4apps.com
www.a4apps.com

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Certificate

The complete raw certificate details for a4apps.com in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAmM7ncmsTfmbY7GIhdGry
zevZpZnCLtlWcIewdJkaO7431S9W1E4IkVIHGH+t/AamRX1Vv5kjDSThEHW5icz6
B16Rt+11FHiNOcPi8YTNUyzpqsLPo2i23cWgPhloPpESwf5fLjnIN8KP/W35w30F
BW5mSKg1iDAaXq6ZuM3ZBqIz/sDrbFz/jbTAwRtU20mMUx73JsNIFuxUE++omGJ5
kBMBxX9IhM23rkvLtMCXgN8+MwlJpQuDeDDmdLKZUHL2+fo1RJ9eLzvrzc93dPnB
18SDYcQ/HXwfZzyKrS8WHdE5Bkb6CNXafn1bkcj5opeHBvYqt8apW6MMO2XnQ3bD
xwIDAQAB
-----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 397471382697644840631098569849025095600172
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-04-27 09:07:03 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-26 09:07:02 +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 'a4apps.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 19290250564082963170210305057660043121670083983726698132100231309185454201445712190775855029139274685871507228963684889661612322973686259047139303877019260317657413257632537905466552675599317723367547488430038741789480649967026065723905547975382660469464944398309383396784727261399054148560316048420468233339794664912015256717463084827622570697606237725281034166168654883092524482319531580545696106525846547190681818757033742956709778557080216637652639690766207668920716866344570148638928258442446281024487474447813527165629181901138888047815683339002677825292527563746770242166620227173570002357535553523985902126023
 . . . . . . . . . . . . . . . . . . . . [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)
							70484aa7c34098010e70b5c0d80f19766873c556
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 (30 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'a4apps.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.a4apps.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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007500eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018f1f05c9cd000004030046304402207eab8b1bd2990e54f67a903cde826ce26030229bdc1db1a97f0aa7d960ae9f93022004cfd6b1e37034b5f5ca62cce6606c46ca5cc1904dbfefd17039af64a6d00dda007700dfe156ebaa05afb59c0f86718da8c0324eae56d96ea7f5a56a01d1c13bbe525c0000018f1f05cbbd0000040300483046022100a4361e5bbba11914e996fb3769f5923ded04d93c2e2005ee8bf6f9b3db926b1b02210093750bd24fc612909a945b240a933a180bab3aa9a5e480eadcc8e0c48d5fe810
 . . . . [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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