www.astraled.de
Issued by Let's Encrypt Authority X3
About this certificate
This digital certificate with serial number 04:79:59:11:30:e9:49:ee:88:08:95:24:f2:90:4f:53:01:83 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.astraled.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:79:59:11:30:e9:49:ee:88:08:95:24:f2:90:4f:53:01:83Serial Number (int): 389741700677184696883888009440875299144067
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: 8c:fc:45:71:c3:49:14:98:ae:90:74:36:33:88:b1:ca:58:81:c8:7a
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1
Fingerprint (sha1): fc:da:2b:91:0b:8e:07:cd:91:1f:3c:b3:24:c4:cb:99:82:a4:f1:f3
Fingerprint (sha256): be:14:61:48:e3:52:e1:28:0b:8d:a5:15:42:ce:31:82:2d:53:b3:30:a4:d3:94:ce:cb:ca:0d:32:15:9d:e1:95
Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/
Revocation information
OCSP Server: http://ocsp.int-x3.letsencrypt.orgCheck the revocation status for certificate www.astraled.de
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for www.astraled.de
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.astraled.de
Other certificates including the domain name astraled.de
(limited to 100 certificates)
beta.immo-look.ch
test.ms2040.com
astraled.de
astraled.de
www.astraled.de
verticam.com
www.zayn666.lima-city.de
www.verhas.lima-city.de
exchange.ips.codes
hypertravel.de
www.estation.lima-city.de
www.jasmin-csg.12hp.de
www.astraled.de
www.andiguebert.4lima.at
test.ms2040.com
magcon.eu
test.ms2040.com
vartax.lima-city.de
shop.uenel.de
*.gaestehaus-pfuss.com
www.astraled.de
wap.execbase.de
astraled.de
test.ms2040.com
test.ms2040.com
test.ms2040.com
www.astraled.de
www.astraled.de
test.ms2040.com
memoled.com
*.christian-dobisch.de
test.ms2040.com
www.astraled.de
*.lufti.eu
astraled.de
astraled.de
hypertravel.de
test.ms2040.com
astraled.de
astraled.de
www.astraled.de
verticam.com
www.zayn666.lima-city.de
www.verhas.lima-city.de
exchange.ips.codes
hypertravel.de
www.estation.lima-city.de
www.jasmin-csg.12hp.de
www.astraled.de
www.andiguebert.4lima.at
test.ms2040.com
magcon.eu
test.ms2040.com
vartax.lima-city.de
shop.uenel.de
*.gaestehaus-pfuss.com
www.astraled.de
wap.execbase.de
astraled.de
test.ms2040.com
test.ms2040.com
test.ms2040.com
www.astraled.de
www.astraled.de
test.ms2040.com
memoled.com
*.christian-dobisch.de
test.ms2040.com
www.astraled.de
*.lufti.eu
astraled.de
astraled.de
hypertravel.de
Certificate
The complete raw certificate details for www.astraled.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGCjCCBPKgAwIBAgISBHlZETDpSe6ICJUk8pBPUwGDMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xODA2MDgwOTQ2NDJaFw0x ODA5MDYwOTQ2NDJaMBoxGDAWBgNVBAMTD3d3dy5hc3RyYWxlZC5kZTCCASIwDQYJ KoZIhvcNAQEBBQADggEPADCCAQoCggEBANhPdaG3khQ+l3IhIu3yQB8iGAwGmf77 5UFNBJ0pjJY6mcgeQK+Ez62gYPHVc/FKh6ouCaS6FnFXuw4gMTKT2C//CrjRXF2m V5CfWHl0Q7P3ApU5yHt//m/JPYUzamSfx3CtuBY9cWsXyThWSybbQIk4HXXbyyI6 Bd7VDnhLX686XZKphod+hFWVaGho4U/wguHefIs6qKUu4TrTAQMFhmevUc/veg9i FSU36SEtCLegx6olK8GTj9U2rARVl7klb2ouHcGVN+GWDhEZ1j/QaOCVQgbvc/BN EYk8GINv2DsefdwAItu5k60Pjwfne0utCpuyQDSHAbWGQO4tCCzo9nkCAwEAAaOC AxgwggMUMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYB BQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQUjPxFccNJFJiukHQ2M4ixyliB yHowHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUHAQEE YzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5cHQu b3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5cHQu b3JnLzAaBgNVHREEEzARgg93d3cuYXN0cmFsZWQuZGUwgf4GA1UdIASB9jCB8zAI BgZngQwBAgEwgeYGCysGAQQBgt8TAQEBMIHWMCYGCCsGAQUFBwIBFhpodHRwOi8v Y3BzLmxldHNlbmNyeXB0Lm9yZzCBqwYIKwYBBQUHAgIwgZ4MgZtUaGlzIENlcnRp ZmljYXRlIG1heSBvbmx5IGJlIHJlbGllZCB1cG9uIGJ5IFJlbHlpbmcgUGFydGll cyBhbmQgb25seSBpbiBhY2NvcmRhbmNlIHdpdGggdGhlIENlcnRpZmljYXRlIFBv bGljeSBmb3VuZCBhdCBodHRwczovL2xldHNlbmNyeXB0Lm9yZy9yZXBvc2l0b3J5 LzCCAQUGCisGAQQB1nkCBAIEgfYEgfMA8QB2ACk8UZZUyDlluqpQ/FgH1Ldvv1h6 KXLcpMMM9OVFR/R4AAABY98BbWkAAAQDAEcwRQIgUsqlVuogAg4m5gWrg0slQlnl HXrYVA8rKod6Z/QBdQ8CIQDvlLpD1JMwqZPDI+n0M8FzOCarXVnIumqUOh/BTKmR EQB3ANt0r+7LKeyx/so+cW0s5bmquzb3hHGDx12dTze2H79kAAABY98BbYwAAAQD AEgwRgIhAK9LK9gSTOPhL4yt6gfi1ynYUIzLzc3WM17qyWHmCIA9AiEAp5mFMr/K Pgu5R7FMmeN5bCW4bO6aOP6/IOnuCDWesWwwDQYJKoZIhvcNAQELBQADggEBAFUg QJn5O9Kbk2eSkKqE7dklERz5del3J70Bn/jwwqIBB1QpEA0ZdNOxp5XyWZrp89u8 yVsnrxfAowo4fMoMNyKzo+DhGQcpMNoB6IBmTy3v9FC5zSIqJJeAVa4IsBIVT4/f jSyxvQEWI3J1K1w/aEyd0KWJA5+fWVveTW6kMNsYyKyBiAAO48RvaVMni6787r8G Baevd5Whhzu+wAd9NP1HbvhJY3O7wOG0HF15WUBQJMGH97xvRb31jjqReWbqwMKZ O5adZchRTuUePLZUtYCxMEWOwGn25N8K0rqRd6b6kFFBgenvJQlY+h9s/5U/jOuk zIiPBBCmVU7jERj2zKA= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2E91obeSFD6XciEi7fJA HyIYDAaZ/vvlQU0EnSmMljqZyB5Ar4TPraBg8dVz8UqHqi4JpLoWcVe7DiAxMpPY L/8KuNFcXaZXkJ9YeXRDs/cClTnIe3/+b8k9hTNqZJ/HcK24Fj1xaxfJOFZLJttA iTgdddvLIjoF3tUOeEtfrzpdkqmGh36EVZVoaGjhT/CC4d58izqopS7hOtMBAwWG Z69Rz+96D2IVJTfpIS0It6DHqiUrwZOP1TasBFWXuSVvai4dwZU34ZYOERnWP9Bo 4JVCBu9z8E0RiTwYg2/YOx593AAi27mTrQ+PB+d7S60Km7JANIcBtYZA7i0ILOj2 eQIDAQAB -----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 389741700677184696883888009440875299144067 . . . . . . . . [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 2018-06-08 09:46:42 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2018-09-06 09:46:42 +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.astraled.de' . . . . . . . . [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 27306656811923046686451987952026757021976689607545489338302219253808784391930245039880627123390812929525197728420817352017601036024279158500134991931170326510916108810496816238761426938309496055172442195406035233904774077257237625599962657859151740314662553245724003063942430794775270169461555556941081286467841052664954793661637604891101599314062025089553718697402552030693371268479072450304346049457136219857572078465457702011934070777117430022829975689064811866613892614714495861260592559343758004833783147733383278972377064006266919033837910030108449534994647028802068136059527889128786060704642827324630051124857 . . . . . . . . . . . . . . . . . . . . [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) 8cfc4571c3491498ae9074363388b1ca5881c87a . . . . . . . . . . . . . . . . [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 (19 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.astraled.de' . . . . . . . . . . . . . . . . [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) 00f1007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f47800000163df016d690000040300473045022052caa556ea20020e26e605ab834b254259e51d7ad8540f2b2a877a67f401750f022100ef94ba43d49330a993c323e9f433c1733826ab5d59c8ba6a943a1fc14ca99111007700db74afeecb29ecb1feca3e716d2ce5b9aabb36f7847183c75d9d4f37b61fbf6400000163df016d8c0000040300483046022100af4b2bd8124ce3e12f8cadea07e2d729d8508ccbcdcdd6335eeac961e608803d022100a7998532bfca3e0bb947b14c99e3796c25b86cee9a38febf20e9ee08359eb16c . . . . [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) 0055204099f93bd29b93679290aa84edd925111cf975e97727bd019ff8f0c2a201075429100d1974d3b1a795f2599ae9f3dbbcc95b27af17c0a30a387cca0c3722b3a3e0e119072930da01e880664f2deff450b9cd222a24978055ae08b012154f8fdf8d2cb1bd01162372752b5c3f684c9dd0a589039f9f595bde4d6ea430db18c8ac8188000ee3c46f6953278baefceebf0605a7af7795a1873bbec0077d34fd476ef8496373bbc0e1b41c5d7959405024c187f7bc6f45bdf58e3a917966eac0c2993b969d65c8514ee51e3cb654b580b130458ec069f6e4df0ad2ba9177a6fa90514181e9ef250958fa1f6cff953f8ceba4cc888f0410a6554ee31118f6cca0