$ openssl x509 -in fefe.pem -noout -text
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            04:09:82:4e:f9:fd:fc:a1:98:d6:df:d8:2a:64:97:51:38:b9
        Signature Algorithm: sha256WithRSAEncryption
        Issuer: C=US, O=Let's Encrypt, CN=R10
        Validity
            Not Before: Feb 25 15:16:30 2025 GMT
            Not After : May 26 15:16:29 2025 GMT
        Subject: CN=alternativlos.org
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
                Public-Key: (4096 bit)
                Modulus:
                    00:bc:24:7b:0f:fb:55:d9:40:5a:55:8b:98:eb:6b:
                    e6:ff:7c:59:fc:5e:56:79:fd:11:ca:9a:45:e0:84:
                    9e:a3:15:39:80:8d:39:68:fc:cc:34:48:77:8f:1f:
                    57:bd:37:d8:ab:83:d4:79:24:6f:96:6e:95:c2:c9:
                    2a:46:5b:7c:e9:6f:ce:a9:af:13:f2:e3:53:76:a9:
                    f5:b3:e5:0c:60:46:e3:8b:8e:ad:d7:6a:6b:9e:85:
                    ba:49:32:45:c2:eb:64:d3:f5:4e:fc:35:21:cd:36:
                    c6:ab:72:7f:c4:c0:93:43:b7:48:36:59:60:15:1a:
                    be:19:9e:e3:55:1c:07:b9:57:03:d3:ae:6b:49:fa:
                    56:93:3f:ed:71:4c:a1:fe:4a:c4:cc:8d:79:da:f9:
                    d8:dc:2c:4d:e9:f3:b3:d0:36:4b:d8:87:49:e7:71:
                    e9:d8:9b:df:b5:f2:34:4a:2b:db:14:d8:cf:42:87:
                    91:56:74:b4:fa:3b:4b:41:d0:dd:fa:42:97:ef:4e:
                    ea:71:79:2f:fd:aa:09:52:74:ae:eb:fe:b9:a6:fc:
                    d8:53:35:5d:50:21:ac:c0:41:ea:e3:6a:57:ce:fd:
                    b1:71:15:0b:6a:5b:de:54:7a:d6:08:5d:02:b8:96:
                    3d:cf:07:1f:33:63:6f:41:d2:bc:ce:fc:55:51:0f:
                    5e:a6:a4:4c:31:73:af:ae:a2:69:93:29:ac:97:5f:
                    1e:75:87:38:2f:e0:5e:4d:0d:57:fe:87:8c:a1:0b:
                    d6:cf:af:e7:57:40:a3:b4:38:3f:6c:c9:c7:bc:a5:
                    7f:78:4b:11:ad:60:5b:62:45:21:b3:77:d7:4c:e4:
                    2e:06:ff:df:0d:ae:51:4c:db:9a:2c:8e:2b:e5:e4:
                    ee:ae:60:d5:14:08:12:9d:fe:96:47:c5:9b:8a:24:
                    04:d0:c0:60:bf:e1:54:77:22:27:b4:a7:ff:be:0d:
                    9f:99:18:20:eb:3e:6f:e7:c1:ca:a8:cf:63:f5:c1:
                    6c:d8:c4:b3:86:d1:00:31:e6:3a:f6:f4:8f:2d:06:
                    c9:7d:58:4a:5b:7e:48:5f:77:01:5e:0a:3e:de:73:
                    2e:91:96:9b:a7:92:bc:bc:a6:78:77:c3:24:f4:44:
                    bc:21:fa:0e:38:9d:39:6c:93:f2:c7:f2:7c:fd:cc:
                    1d:97:b0:c2:c8:af:d8:8c:7f:00:56:11:03:5f:af:
                    64:5f:f3:e6:ea:ad:64:d2:82:df:6c:5f:43:b2:a0:
                    97:5c:80:6d:c3:60:0c:84:44:6e:5b:f1:07:1e:64:
                    4d:f1:ce:ab:cb:b2:64:85:c1:ef:36:f9:f4:60:b6:
                    b7:50:ee:ee:fe:2f:f9:1b:27:f6:e3:2e:ab:c6:99:
                    da:65:6b
                Exponent: 65537 (0x10001)
        X509v3 extensions:

$ openssl x509 -in codeblau.pem -noout -text
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            05:6f:a1:84:bd:72:7d:5f:f2:75:25:ed:a4:ae:3a:24:5f:1b
        Signature Algorithm: ecdsa-with-SHA384
        Issuer: C=US, O=Let's Encrypt, CN=E6
        Validity
            Not Before: Apr 13 03:26:52 2025 GMT
            Not After : Jul 12 03:26:51 2025 GMT
        Subject: CN=codeblau.de
        Subject Public Key Info:
            Public Key Algorithm: id-ecPublicKey
                Public-Key: (256 bit)
                pub:
                    04:1e:0b:03:a8:dd:11:0a:b8:6e:7e:2a:cf:09:6e:
                    25:27:b2:84:d4:6a:47:9e:ba:1a:bc:29:d6:c8:f3:
                    e8:31:6a:21:eb:c7:b2:5e:64:f5:3c:f6:12:c1:38:
                    98:47:03:c4:d8:d4:17:87:76:12:3a:97:e1:da:42:
                    39:14:34:a2:b8
                ASN1 OID: prime256v1
                NIST CURVE: P-256
        X509v3 extensions:
            X509v3 Key Usage: critical
                Digital Signature
            X509v3 Extended Key Usage: 
                TLS Web Server Authentication, TLS Web Client Authentication
            X509v3 Basic Constraints: critical
                CA:FALSE
            X509v3 Subject Key Identifier: 
                41:9B:7C:50:E7:99:32:6A:9D:8C:A1:16:B8:0D:45:55:15:23:ED:25
            X509v3 Authority Key Identifier: 
                93:27:46:98:03:A9:51:68:8E:98:D6:C4:42:48:DB:23:BF:58:94:D2
            Authority Information Access: 
                OCSP - URI:http://e6.o.lencr.org
                CA Issuers - URI:http://e6.i.lencr.org/
            X509v3 Subject Alternative Name: 
                DNS:codeblau.de
            X509v3 Certificate Policies: 
                Policy: 2.23.140.1.2.1
            X509v3 CRL Distribution Points: 
                Full Name:
                  URI:http://e6.c.lencr.org/28.crl

            CT Precertificate SCTs: 
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : 7D:59:1E:12:E1:78:2A:7B:1C:61:67:7C:5E:FD:F8:D0:
                                87:5C:14:A0:4E:95:9E:B9:03:2F:D9:0E:8C:2E:79:B8
                    Timestamp : Apr 13 04:25:22.599 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:21:00:F4:AA:BE:97:13:9F:32:92:95:8A:95:
                                63:FE:C3:EB:EA:05:04:F7:30:18:2B:C4:92:6E:E6:C6:
                                58:EC:F5:1A:8F:02:20:1F:10:74:F9:7F:AC:31:9E:80:
                                7F:D5:6E:E7:63:E9:B4:D5:EA:8A:0B:4C:39:34:C0:59:
                                40:8F:16:F6:65:87:C4
                Signed Certificate Timestamp:
                    Version   : v1 (0x0)
                    Log ID    : CC:FB:0F:6A:85:71:09:65:FE:95:9B:53:CE:E9:B2:7C:
                                22:E9:85:5C:0D:97:8D:B6:A9:7E:54:C0:FE:4C:0D:B0
                    Timestamp : Apr 13 04:25:22.628 2025 GMT
                    Extensions: none
                    Signature : ecdsa-with-SHA256
                                30:45:02:21:00:88:37:E7:25:20:FD:A6:1E:F9:4E:B0:
                                CF:BB:54:C1:CB:94:E8:66:18:9C:AB:66:C3:56:FA:D1:
                                72:5B:85:3F:B1:02:20:63:0C:02:77:95:2B:25:5C:69:
                                9F:49:02:16:5E:A9:75:FF:49:82:98:3B:8B:40:76:3C:
                                19:7A:61:61:22:8E:46
    Signature Algorithm: ecdsa-with-SHA384
    Signature Value:
        30:64:02:30:1a:7d:81:14:68:ab:e5:67:86:f4:8e:41:a8:bd:
        8b:8c:08:ac:86:05:7e:f6:80:5c:62:61:69:64:76:b6:9b:41:
        48:47:42:42:c2:e0:e9:8e:14:da:44:31:62:87:c7:1f:02:30:
        05:59:65:5e:92:7a:5f:6f:76:78:de:7e:8b:61:3b:36:17:9a:
        45:8a:f8:94:4f:3e:79:ba:ff:64:ab:c3:5a:11:af:36:f4:c6:
        be:e5:03:34:e5:05:f6:e2:2f:af:c8:ac