mail.12bis3.de
Issued by R3
About this certificate
This digital certificate with serial number 04:93:c5:72:e8:8f:d1:50:5d:c1:92:80:3c:66:ec:13:16:71 was issued on by Let's Encrypt.
With 4 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:
- 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=mail.12bis3.de
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 04:93:c5:72:e8:8f:d1:50:5d:c1:92:80:3c:66:ec:13:16:71Serial Number (int): 398733106218343876923519797708436123358833
Serial Number lenght: 139 bits, 18 octets
SubjectKeyId: d1:b6:48:c9:dc:43:2f:d8:84:c0:77:b7:f9:22:68:f9:3d:d8:f4:a7
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): a4:6d:4f:58:c5:2e:bc:82:a4:af:d2:9d:26:27:83:f6:72:13:66:de
Fingerprint (sha256): 9a:ff:fb:07:65:e7:fd:ec:36:83:88:7b:70:e2:17:96:b8:ff:4a:d3:b1:82:61:8d:db:21:15:80:87:1b:bb:0e
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate mail.12bis3.de
4
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for mail.12bis3.de
Public Key Algorithm
ECDSA
Key Size
256
Signature Algorithm
SHA256 with RSA
Key Usage
Digital Signature
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
imap.12bis3.de
mail.12bis3.de
pop3.12bis3.de
smtp.12bis3.de
mail.12bis3.de
pop3.12bis3.de
smtp.12bis3.de
Other certificates including the domain name 12bis3.de
(limited to 100 certificates)
www.tekom.de
tekom.56.stage.12bis3.de
www.tekom.de
12bis3.de
webmail.12bis3.de
www.tekom.de
12bis3.de
12bis3.de
webmail.12bis3.de
tekom.56.stage.12bis3.de
live.tekom.12bis3.de
www.kaercher-municipal.com
tekom.56.stage.12bis3.de
12bis3.de
www.kaercher-municipal.com
tekomconferences.72.stage.12bis3.de
12bis3.de
www.tekom.de
www.tekom.de
12bis3.de
www.tekom.de
tekom.56.stage.12bis3.de
webmail.12bis3.de
12bis3.de
webmail.12bis3.de
tekom.56.stage.12bis3.de
12bis3.de
www.tekom.de
apps.12bis3.de
webmail.12bis3.de
www.tekom.de
www.tekom.de
www.tekom.de
hoeveler.72.stage.12bis3.de
12bis3.de
aussicht.stage.12bis3.de
relaunch.maxholder.12bis3.de
hoeveler.72.stage.12bis3.de
hoeveler.72.stage.12bis3.de
*.12bis3.de
git.12bis3.de
12bis3.de
git.12bis3.de
git.12bis3.de
www.tekom.de
*.12bis3.de
webmail.12bis3.de
git.12bis3.de
webmail.12bis3.de
mail.12bis3.de
webmail.12bis3.de
relaunch.maxholder.12bis3.de
*.12bis3.de
webmail.12bis3.de
webmail.12bis3.de
git.12bis3.de
*.12bis3.de
relaunch.maxholder.12bis3.de
www.tekom.de
www.tekom.de
*.12bis3.de
tekom.56.stage.12bis3.de
www.tekom.de
www.tekom.de
git.12bis3.de
www.tekom.de
12bis3.de
www.tekom.de
tekom.56.stage.12bis3.de
*.12bis3.de
www.kaercher-municipal.com
12bis3.de
relaunch.maxholder.12bis3.de
12bis3.de
www.kaercher-municipal.com
git.12bis3.de
12bis3.de
cloud.12bis3.de
git.12bis3.de
www.tekom.de
tekom.56.stage.12bis3.de
www.tekom.de
12bis3.de
webmail.12bis3.de
www.tekom.de
12bis3.de
12bis3.de
webmail.12bis3.de
tekom.56.stage.12bis3.de
live.tekom.12bis3.de
www.kaercher-municipal.com
tekom.56.stage.12bis3.de
12bis3.de
www.kaercher-municipal.com
tekomconferences.72.stage.12bis3.de
12bis3.de
www.tekom.de
www.tekom.de
12bis3.de
www.tekom.de
tekom.56.stage.12bis3.de
webmail.12bis3.de
12bis3.de
webmail.12bis3.de
tekom.56.stage.12bis3.de
12bis3.de
www.tekom.de
apps.12bis3.de
webmail.12bis3.de
www.tekom.de
www.tekom.de
www.tekom.de
hoeveler.72.stage.12bis3.de
12bis3.de
aussicht.stage.12bis3.de
relaunch.maxholder.12bis3.de
hoeveler.72.stage.12bis3.de
hoeveler.72.stage.12bis3.de
*.12bis3.de
git.12bis3.de
12bis3.de
git.12bis3.de
git.12bis3.de
www.tekom.de
*.12bis3.de
webmail.12bis3.de
git.12bis3.de
webmail.12bis3.de
mail.12bis3.de
webmail.12bis3.de
relaunch.maxholder.12bis3.de
*.12bis3.de
webmail.12bis3.de
webmail.12bis3.de
git.12bis3.de
*.12bis3.de
relaunch.maxholder.12bis3.de
www.tekom.de
www.tekom.de
*.12bis3.de
tekom.56.stage.12bis3.de
www.tekom.de
www.tekom.de
git.12bis3.de
www.tekom.de
12bis3.de
www.tekom.de
tekom.56.stage.12bis3.de
*.12bis3.de
www.kaercher-municipal.com
12bis3.de
relaunch.maxholder.12bis3.de
12bis3.de
www.kaercher-municipal.com
git.12bis3.de
12bis3.de
cloud.12bis3.de
git.12bis3.de
www.tekom.de
Certificate
The complete raw certificate details for mail.12bis3.de in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIDWzCCAkOgAwIBAgISBJPFcuiP0VBdwZKAPGbsExZxMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzEyMDIwMzA1NDJaFw0yNDAzMDEwMzA1NDFaMBkxFzAVBgNVBAMT Dm1haWwuMTJiaXMzLmRlMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEhrBM3HLN Ouf2JN044JEnTnC9SpCFQ7uk8eG/N7ya0Eq1D7owjG9JKxFRwPUlBI2gSelJWJ4u j2Ik/5sQXMpM1KOCAU0wggFJMA4GA1UdDwEB/wQEAwIHgDAdBgNVHSUEFjAUBggr BgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU0bZIydxD L9iEwHe3+SJo+T3Y9KcwHwYDVR0jBBgwFoAUFC6zF7dYVsuuUAlA5h+vnYsUwsYw VQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzABhhVodHRwOi8vcjMuby5sZW5jci5v cmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5pLmxlbmNyLm9yZy8wSQYDVR0RBEIw QIIOaW1hcC4xMmJpczMuZGWCDm1haWwuMTJiaXMzLmRlgg5wb3AzLjEyYmlzMy5k ZYIOc210cC4xMmJpczMuZGUwEwYDVR0gBAwwCjAIBgZngQwBAgEwEwYKKwYBBAHW eQIEAwEB/wQCBQAwDQYJKoZIhvcNAQELBQADggEBABHFh6FZnHa1B/fJiirY59DL hJyyz5VkpKCUQaLQdQOw+q7DGtHhwV0gfLjX/1fIk/U1bNdtbJAEtpckFLzSBPHh MTieQpvJXxvggTCjBkd4qYaHum0ElhjTIzRa75yLvdaO/J8nLW8vdd+E+PbVz42X 1+l3IMrP5vvK6VMzYNNdTdYWuFM/2UANwSOqIcI9LEb87tBixBNh9gdHNWEK/Ind HK+YVKDx7OUkZkwg/yyu/fRvFMqHa5uXRUxyBu3yPCzCTITOzdUOSYgFMJukQNli Bjlg7h5kFg0NbvIyey7icZy1S2HQaQWzQdTaUOZxFuGtVDuoM5LoglTspgvhqE8= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEhrBM3HLNOuf2JN044JEnTnC9SpCF Q7uk8eG/N7ya0Eq1D7owjG9JKxFRwPUlBI2gSelJWJ4uj2Ik/5sQXMpM1A== -----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 398733106218343876923519797708436123358833 . . . . . . . . [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 2023-12-02 03:05:42 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-03-01 03:05:41 +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 'mail.12bis3.de' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.2.1 (ecPublicKey) . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.10045.3.1.7 (prime256v1) . . . . . . . . . . . . [c:0|t:3|false] BIT STRING (520 bits) 000486b04cdc72cd3ae7f624dd38e091274e70bd4a908543bba4f1e1bf37bc9ad04ab50fba308c6f492b1151c0f525048da049e949589e2e8f6224ff9b105cca4cd4 . . . . . . . . [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 (1 bits) 0780 . . . . . . . . . . . . . . . . [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) d1b648c9dc432fd884c077b7f92268f93dd8f4a7 . . . . . . . . . . . . . . . . [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 (66 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'imap.12bis3.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.12bis3.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'pop3.12bis3.de' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'smtp.12bis3.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 (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 1.3.6.1.4.1.11129.2.4.3 (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) 0011c587a1599c76b507f7c98a2ad8e7d0cb849cb2cf9564a4a09441a2d07503b0faaec31ad1e1c15d207cb8d7ff57c893f5356cd76d6c9004b6972414bcd204f1e131389e429bc95f1be08130a3064778a98687ba6d049618d323345aef9c8bbdd68efc9f272d6f2f75df84f8f6d5cf8d97d7e97720cacfe6fbcae9533360d35d4dd616b8533fd9400dc123aa21c23d2c46fceed062c41361f6074735610afc89dd1caf9854a0f1ece524664c20ff2caefdf46f14ca876b9b97454c7206edf23c2cc24c84cecdd50e498805309ba440d962063960ee1e64160d0d6ef2327b2ee2719cb54b61d06905b341d4da50e67116e1ad543ba83392e88254eca60be1a84f