speedtest.dialtelecom.cz
Issued by R3
About this certificate
This digital certificate with serial number 03:9f:dd:50:63:60:6d:b9:7c:2e:ff:97:15:17:3f:06:05:71 was issued on by Let's Encrypt.
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=speedtest.dialtelecom.cz
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate will expire on
Certificate Details
Serial Number (hex): 03:9f:dd:50:63:60:6d:b9:7c:2e:ff:97:15:17:3f:06:05:71Serial Number (int): 315735930922125517291342599903541230699889
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: 05:ee:f1:55:3a:97:ab:e9:28:38:e5:d7:e4:d0:e8:45:8f:b9:8e:34
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): 61:19:69:32:bb:07:cb:66:14:d1:45:83:f8:16:28:d3:2b:ff:2f:66
Fingerprint (sha256): ac:1a:9d:ac:65:a6:b8:fc:65:b6:f5:bd:b1:ce:7d:81:6e:ff:a3:d6:5b:d4:c1:91:b1:c3:0f:64:77:70:41:0d
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate speedtest.dialtelecom.cz
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for speedtest.dialtelecom.cz
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
speedtest.dialtelecom.cz
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Certificate
The complete raw certificate details for speedtest.dialtelecom.cz in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIECjCCAvKgAwIBAgISA5/dUGNgbbl8Lv+XFRc/BgVxMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yNDA0MDIxNTM5MjFaFw0yNDA3MDExNTM5MjBaMCMxITAfBgNVBAMT GHNwZWVkdGVzdC5kaWFsdGVsZWNvbS5jejCCASIwDQYJKoZIhvcNAQEBBQADggEP ADCCAQoCggEBAL1gawlXap4dhVyS/Dh0TIN0ShtuX3aZ6F3NCZQNT6/9ueqij7eD DTqwwHjA8XzVEkryLk1sdBwG6qKoalMcPfvt/OBj0qW/dKLrKea/qP06ho0pJ3l+ 7mdPZjZZW2u6B0ZdpUfW6ve39PlF2hJCjSO9QiTPKLCCvUOrQzGvtdA1c/nbWneU Wz68tRD8I3XlRP+/YGNGZaSUTW7IpIAVIHSL4cxhVL/pZFHkU2a7XoVcGtl2KHqr 15UuqLt5uv2Kv44iFSBCpdEIWUOy/VPu6W/pDeWXbAUVDhQZWRI5i3o0mnEO3f12 5dajWeNFfU9O0lvDlthHI0ZoNrKpzK8vOLMCAwEAAaOCAScwggEjMA4GA1UdDwEB /wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/ BAIwADAdBgNVHQ4EFgQUBe7xVTqXq+koOOXX5NDoRY+5jjQwHwYDVR0jBBgwFoAU FC6zF7dYVsuuUAlA5h+vnYsUwsYwVQYIKwYBBQUHAQEESTBHMCEGCCsGAQUFBzAB hhVodHRwOi8vcjMuby5sZW5jci5vcmcwIgYIKwYBBQUHMAKGFmh0dHA6Ly9yMy5p LmxlbmNyLm9yZy8wIwYDVR0RBBwwGoIYc3BlZWR0ZXN0LmRpYWx0ZWxlY29tLmN6 MBMGA1UdIAQMMAowCAYGZ4EMAQIBMBMGCisGAQQB1nkCBAMBAf8EAgUAMA0GCSqG SIb3DQEBCwUAA4IBAQCspzFJgR89sc8NT4bc3Djxv6cClz/cTQnJdU42Bsp5QEYz +RBaiJSoRe6UN3rJGwHD30ne2hcCxSNiId+fcE7hjyYsSpLWV19NNLtyuRz1+Pna IjLSTHkNI2flbKqeVUzb19ziSvEbyimeeFPd8UV4rsey7Dm7CcALJvs4PmNwIrzG Dgmvte1q5U4osMaB8Ue16+wHky+xPmssHCXNa00QpE5QPvQQPT27CyP8tNwObvdA Nh5y4e1bWDVdSePXHA59A5/1xcswiWPTmcp/ygi+phDxAwRy94U9F9VoFYo0XQfE 6Y8zFAZMAuR1QlK7Mnw0srLJrrgZjwYXI2cAItBd -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAvWBrCVdqnh2FXJL8OHRM g3RKG25fdpnoXc0JlA1Pr/256qKPt4MNOrDAeMDxfNUSSvIuTWx0HAbqoqhqUxw9 ++384GPSpb90ousp5r+o/TqGjSkneX7uZ09mNllba7oHRl2lR9bq97f0+UXaEkKN I71CJM8osIK9Q6tDMa+10DVz+dtad5RbPry1EPwjdeVE/79gY0ZlpJRNbsikgBUg dIvhzGFUv+lkUeRTZrtehVwa2XYoeqvXlS6ou3m6/Yq/jiIVIEKl0QhZQ7L9U+7p b+kN5ZdsBRUOFBlZEjmLejSacQ7d/Xbl1qNZ40V9T07SW8OW2EcjRmg2sqnMry84 swIDAQAB -----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 315735930922125517291342599903541230699889 . . . . . . . . [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 2024-04-02 15:39:21 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-01 15:39:20 +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 'speedtest.dialtelecom.cz' . . . . . . . . [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 23906585181308591351736911867119173846618682934900804381044619387388110037276406838759576127572994097800203752120124306524137154414672970726446772572844302205142120534086258518102209167041718286063181115334655228391945434522873640838242740671743741592927032757271276455721493255739913550735305068813316372009151707570973382307591380019007736840421655753059966752896312437952805479109362519041811664745464791018709966223754716396069627837517826122570061094794123767760925097274155509153121001133471940006923071161811633457962636067551436925806241701792176550747198372272685997031568011060381142322859453841353292593331 . . . . . . . . . . . . . . . . . . . . [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) 05eef1553a97abe92838e5d7e4d0e8458fb98e34 . . . . . . . . . . . . . . . . [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 (28 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'speedtest.dialtelecom.cz' . . . . . . . . . . . . . . . . [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) 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