super.internetsupermarkt24.space
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:bc:8d:7e:88:96:f5:7b:c1:05:b4:66:aa:c8:bb:46:a3:ec 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=super.internetsupermarkt24.space
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:bc:8d:7e:88:96:f5:7b:c1:05:b4:66:aa:c8:bb:46:a3:ecSerial Number (int): 412610306855355170154541490461787547935724
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 5a:4c:c0:c1:7c:8a:47:cb:fc:93:4a:4e:d3:6f:e0:8c:d5:9a:3d:b0
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): 1e:b9:9f:31:ee:ae:e6:34:e6:51:18:4d:b6:9a:6c:a6:b3:ef:d4:9b
Fingerprint (sha256): c7:34:67:7a:f9:8e:b4:f7:de:11:b9:14:0f:12:11:c3:c2:34:86:1f:7d:f1:73:2d:0f:ce:6d:bf:26:1b:61:ec
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate super.internetsupermarkt24.space
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for super.internetsupermarkt24.space
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
super.internetsupermarkt24.space
Other certificates including the domain name internetsupermarkt24.space
(limited to 100 certificates)
www.hpfier.lima-city.de
www.natrimos.lima-city.de
elswordna.lima-city.de
internet.internetsupermarkt24.space
25a.salschnig.at
steve--e.lima-city.de
haarspitzenteam.lima-city.de
supermarkt.internetsupermarkt24.space
annies.lima-city.de
jack0craft.lima-city.de
www.samantharone.tk
paul.ga
supermarkt.internetsupermarkt24.space
nickel112.lima-city.de
super.internetsupermarkt24.space
www.wurmundsturm.de
supermarkt.internetsupermarkt24.space
super.internetsupermarkt24.space
www.natrimos.lima-city.de
elswordna.lima-city.de
internet.internetsupermarkt24.space
25a.salschnig.at
steve--e.lima-city.de
haarspitzenteam.lima-city.de
supermarkt.internetsupermarkt24.space
annies.lima-city.de
jack0craft.lima-city.de
www.samantharone.tk
paul.ga
supermarkt.internetsupermarkt24.space
nickel112.lima-city.de
super.internetsupermarkt24.space
www.wurmundsturm.de
supermarkt.internetsupermarkt24.space
super.internetsupermarkt24.space
Certificate
The complete raw certificate details for super.internetsupermarkt24.space in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGLDCCBRSgAwIBAgISBLyNfoiW9XvBBbRmqsi7RqPsMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODA1MDYxMjQwMDdaFw0x ODA4MDQxMjQwMDdaMCsxKTAnBgNVBAMTIHN1cGVyLmludGVybmV0c3VwZXJtYXJr dDI0LnNwYWNlMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn/Qi3+rt 03Rjp8pw/vsghBO4DfXc4BUGyNwHnHWVH6xmsEz6IuzSXsBGLNRX7KIW1lK8k6Mc JKuPDQRrXsLj8o/1CrAxhJh3ULV1xV1aPdkIkIk8e0wgP+z7nGQso/uxrmeqMaS7 zd7EW2O+XCptUM7/uDCx1FC3lm/UtDCkN9n0X3hOfCH9X+FhH9vqhXBW/DQY9l1F 8SSqwX/wx/U7qpHK6xlXOQv5PnuTgPS+mxOj3hPVRspJvuFv/o/h0fcvcxSqg6jx VyivcoMrhKIhM64e6Nkr/N5ozmG7zj1KXfIrTm8uYjXYSEs6XFmiVgZGYwj8HUSb X1IMksGUMM+4VwIDAQABo4IDKTCCAyUwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBRa TMDBfIpHy/yTSk7Tb+CM1Zo9sDAfBgNVHSMEGDAWgBSoSmpjBH3duubRObemRWXv 86jsoTBvBggrBgEFBQcBAQRjMGEwLgYIKwYBBQUHMAGGImh0dHA6Ly9vY3NwLmlu dC14My5sZXRzZW5jcnlwdC5vcmcwLwYIKwYBBQUHMAKGI2h0dHA6Ly9jZXJ0Lmlu dC14My5sZXRzZW5jcnlwdC5vcmcvMCsGA1UdEQQkMCKCIHN1cGVyLmludGVybmV0 c3VwZXJtYXJrdDI0LnNwYWNlMIH+BgNVHSAEgfYwgfMwCAYGZ4EMAQIBMIHmBgsr BgEEAYLfEwEBATCB1jAmBggrBgEFBQcCARYaaHR0cDovL2Nwcy5sZXRzZW5jcnlw dC5vcmcwgasGCCsGAQUFBwICMIGeDIGbVGhpcyBDZXJ0aWZpY2F0ZSBtYXkgb25s eSBiZSByZWxpZWQgdXBvbiBieSBSZWx5aW5nIFBhcnRpZXMgYW5kIG9ubHkgaW4g YWNjb3JkYW5jZSB3aXRoIHRoZSBDZXJ0aWZpY2F0ZSBQb2xpY3kgZm91bmQgYXQg aHR0cHM6Ly9sZXRzZW5jcnlwdC5vcmcvcmVwb3NpdG9yeS8wggEFBgorBgEEAdZ5 AgQCBIH2BIHzAPEAdwBVgdTCFpA2AUrqC5tXPFPwwOQ4eHAlCBcvo6odBxPTDAAA AWM1rlWLAAAEAwBIMEYCIQChKzKT8BfoiSDdGGao/Cxdm3XeCc+5LZRlnUyoND60 GQIhAMakFEhFvRSYO41GninWZdqN3uqF6CvYso1HBKSEY9M0AHYAKTxRllTIOWW6 qlD8WAfUt2+/WHopctykwwz05UVH9HgAAAFjNa5VewAABAMARzBFAiBn2RSWbdNN /TVcJtTYMIQJvXFCvFjv2eNOBMUNgpelUgIhALj8A3k7+5Q519Q0BGyGwjMkhRD0 R4zriBOQsaRh1r0GMA0GCSqGSIb3DQEBCwUAA4IBAQAi5qlZe9mnsLwawB72pW4U CHNVmFFDKHW2SwfJbM/28h4bfeKjxD6DpBXMToWGkfglq/i/K0BjivYA6tDrym1j wftV95XrDdWAuQ3rrhOEv1bj7LdVpwVc9yh6ImPyRdZ4u8ftoP64yxve2bJSFS53 qilnR4LjD6eW2+fRn1BktmTK9Bkagq4+Nh9j2nzK8PjuO4B9DTmXcpXRR9MuKCv/ S7/Tha/fyjVXQI9zpOC4/fl9yeTgXkPmbobmcIxrjfgQSCxD/TUqXPkb16b4a2V2 ScSO7r+j9HwcD1FEBmL3RBNkZH0soWrOsrY0Kj0fXy3tn6jpIzf71N1a2BmbQKpP -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAn/Qi3+rt03Rjp8pw/vsg hBO4DfXc4BUGyNwHnHWVH6xmsEz6IuzSXsBGLNRX7KIW1lK8k6McJKuPDQRrXsLj 8o/1CrAxhJh3ULV1xV1aPdkIkIk8e0wgP+z7nGQso/uxrmeqMaS7zd7EW2O+XCpt UM7/uDCx1FC3lm/UtDCkN9n0X3hOfCH9X+FhH9vqhXBW/DQY9l1F8SSqwX/wx/U7 qpHK6xlXOQv5PnuTgPS+mxOj3hPVRspJvuFv/o/h0fcvcxSqg6jxVyivcoMrhKIh M64e6Nkr/N5ozmG7zj1KXfIrTm8uYjXYSEs6XFmiVgZGYwj8HUSbX1IMksGUMM+4 VwIDAQAB -----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 412610306855355170154541490461787547935724 . . . . . . . . [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 2018-05-06 12:40:07 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-08-04 12:40:07 +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 'super.internetsupermarkt24.space' . . . . . . . . [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 20192278551152663466552041532376612603264095820528856975370377544558149979677193557576206486866778174322848547893381169601634843082727337103334212291167636486354631530144860572906873730653441988481306520489827165370563185109911694864033483228762274080768760189921599480846161951704895880134804656489128403428334617010304809612601492360630014190110681849762428231434672557169551806049530420743792440064400690914056115007268019179824286787968256069796756676950668387761282964913973665231916959051785066817618003165076883559850766482008977005870491294471407422107412892395513191407268562182113816100560613791620056201303 . . . . . . . . . . . . . . . . . . . . [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) 5a4cc0c17c8a47cbfc934a4ed36fe08cd59a3db0 . . . . . . . . . . . . . . . . [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 (36 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'super.internetsupermarkt24.space' . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes) 00f10077005581d4c2169036014aea0b9b573c53f0c0e43878702508172fa3aa1d0713d30c0000016335ae558b0000040300483046022100a12b3293f017e88920dd1866a8fc2c5d9b75de09cfb92d94659d4ca8343eb419022100c6a4144845bd14983b8d469e29d665da8ddeea85e82bd8b28d4704a48463d334007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016335ae557b0000040300473045022067d914966dd34dfd355c26d4d8308409bd7142bc58efd9e34e04c50d8297a552022100b8fc03793bfb9439d7d434046c86c233248510f4478ceb881390b1a461d6bd06 . . . . [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) 0022e6a9597bd9a7b0bc1ac01ef6a56e140873559851432875b64b07c96ccff6f21e1b7de2a3c43e83a415cc4e858691f825abf8bf2b40638af600ead0ebca6d63c1fb55f795eb0dd580b90debae1384bf56e3ecb755a7055cf7287a2263f245d678bbc7eda0feb8cb1bded9b252152e77aa29674782e30fa796dbe7d19f5064b664caf4191a82ae3e361f63da7ccaf0f8ee3b807d0d39977295d147d32e282bff4bbfd385afdfca3557408f73a4e0b8fdf97dc9e4e05e43e66e86e6708c6b8df810482c43fd352a5cf91bd7a6f86b657649c48eeebfa3f47c1c0f51440662f7441364647d2ca16aceb2b6342a3d1f5f2ded9fa8e92337fbd4dd5ad8199b40aa4f