classroom.tomlinson.center
Issued by Sectigo RSA Domain Validation Secure Server CA
About this certificate
This digital certificate with serial number 54:13:5f:df:32:ca:5e:df:aa:9d:6c:51:38:46:fd:12 was issued on by Sectigo Limited.
With 2 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:
- Subscriber Certificate: commonName is deprecated. (BRs: 7.1.4.2.2)
Certificate Subject
CN=classroom.tomlinson.center
Sectigo Limited
Organization:
Sectigo Limited
State / Province:
Greater Manchester
Locality: Salford
Country: GB
Locality: Salford
Country: GB
This certificate has expire since
Certificate Details
Serial Number (hex): 54:13:5f:df:32:ca:5e:df:aa:9d:6c:51:38:46:fd:12Serial Number (int): 111755749798756584173496259210270670098
Serial Number lenght: 127 bits, 16 octets
SubjectKeyId: a5:df:f0:60:de:73:bd:26:98:20:a2:87:6f:e5:cd:86:8b:c3:9f:f3
AuthorityKeyId: 8d:8c:5e:c4:54:ad:8a:e1:77:e9:9b:f9:9b:05:e1:b8:01:8d:61:e1
Fingerprint (sha1): 42:a4:36:61:a1:fe:52:2e:04:ad:6d:2d:5d:da:45:fe:97:62:45:60
Fingerprint (sha256): 60:4b:ca:db:0b:54:ae:bc:d4:7c:13:f6:4f:03:85:d3:30:57:c3:b9:5b:2e:fc:96:cf:60:45:cd:99:93:70:3f
Issuing Certificate URL: http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt
Revocation information
OCSP Server: http://ocsp.sectigo.comCheck the revocation status for certificate classroom.tomlinson.center
2
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for classroom.tomlinson.center
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
classroom.tomlinson.center
www.classroom.tomlinson.center
www.classroom.tomlinson.center
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Certificate
The complete raw certificate details for classroom.tomlinson.center in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIF4zCCBMugAwIBAgIQVBNf3zLKXt+qnWxROEb9EjANBgkqhkiG9w0BAQsFADCB jzELMAkGA1UEBhMCR0IxGzAZBgNVBAgTEkdyZWF0ZXIgTWFuY2hlc3RlcjEQMA4G A1UEBxMHU2FsZm9yZDEYMBYGA1UEChMPU2VjdGlnbyBMaW1pdGVkMTcwNQYDVQQD Ey5TZWN0aWdvIFJTQSBEb21haW4gVmFsaWRhdGlvbiBTZWN1cmUgU2VydmVyIENB MB4XDTIwMDIwNDAwMDAwMFoXDTIwMDUwNDIzNTk1OVowJTEjMCEGA1UEAxMaY2xh c3Nyb29tLnRvbWxpbnNvbi5jZW50ZXIwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAw ggEKAoIBAQCLyr9uIZBQxdpJpvfJ9uiOCFIr4sqQSm8NWc6vcGDJsbfWuuGQLbDo mIbCfdyn07opIZMJmoeNNdCAoOUbbsgXNccw4NwFf+3e3A99BdMxWH2i1Ww6bBmw SYmPzlUiaqmSNXkhg+iVMhSc0itTxMBGTHvhNDcBFo0TYfivymc2L1pFVP0LkeSz U7MrjcR8ytt0QDvu/vCYuA8pViJitCixCx7Iu9KNbKH9RIw2h8OWj8oH7+ZWIE5K cDfGrP6BLLsFTcJQGlQ+nijjpOPGCvdEm7XZjZ05PWKlYb6Su6zIXh82ZF47zwLJ THwOgtd76+rcIrrG7Y//1i6Gc3fIlkdtAgMBAAGjggKiMIICnjAfBgNVHSMEGDAW gBSNjF7EVK2K4Xfpm/mbBeG4AY1h4TAdBgNVHQ4EFgQUpd/wYN5zvSaYIKKHb+XN hovDn/MwDgYDVR0PAQH/BAQDAgWgMAwGA1UdEwEB/wQCMAAwHQYDVR0lBBYwFAYI KwYBBQUHAwEGCCsGAQUFBwMCMEkGA1UdIARCMEAwNAYLKwYBBAGyMQECAgcwJTAj BggrBgEFBQcCARYXaHR0cHM6Ly9zZWN0aWdvLmNvbS9DUFMwCAYGZ4EMAQIBMIGE BggrBgEFBQcBAQR4MHYwTwYIKwYBBQUHMAKGQ2h0dHA6Ly9jcnQuc2VjdGlnby5j b20vU2VjdGlnb1JTQURvbWFpblZhbGlkYXRpb25TZWN1cmVTZXJ2ZXJDQS5jcnQw IwYIKwYBBQUHMAGGF2h0dHA6Ly9vY3NwLnNlY3RpZ28uY29tMEUGA1UdEQQ+MDyC GmNsYXNzcm9vbS50b21saW5zb24uY2VudGVygh53d3cuY2xhc3Nyb29tLnRvbWxp bnNvbi5jZW50ZXIwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgAHt1wb5X1o//Gw xh0jFce65ld8V5S3au68YToaadOiHAAAAXASA5xoAAAEAwBHMEUCIFVNoSfhi/Qw Stf+sPXvmWyexyGxHO61pIFNtZ7XktUEAiEAueZvnxTzMrDXd1YbbgI0qQm5QZsu xiXNeJ++ps14PUoAdgBep3P531bA57U2SH3QSeAyepGaDIShEhKEGHWWgXFFWAAA AXASA5xYAAAEAwBHMEUCIQDHNE7OSbQTJpAp1YvItaJEpUbxuviwYtYj3OuUfl2u QAIgPnhTTrKPm2wq55TG7JmLl3NYtF+d7PBIfy47/NTxG3YwDQYJKoZIhvcNAQEL BQADggEBAFZ7kSXT6VSgrl6hoxPWypYjOTC7eRFJZs0LqEGrgVBwlI/yRx8whe2+ HcpdOVFitd10pduj3PYV1qFm68krOeOS7PyjVTAiHr/1HA3HzHHRyn2AHKmijiz8 u7WspcQjOfmeb/BQucaueTQeucfTjW9zHETbEY3R+iLhHuKPFKKwZll2qOdDZz0Y oGoOJRz/llbILAgyBNy3R7Vxma/wa5tcdc9Xt0nGPCPNggwVZ71B8U7DoYkRJ8mr Psi7MsMKD43x5Vs099CaWtEDfmLH+xj9T6VXEPhG5OXL63e0s5Ibj/l/Dsfxqb1t oFc9d3TAhGyjTFMIJGzpuqlCZ196QiU= -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAi8q/biGQUMXaSab3yfbo jghSK+LKkEpvDVnOr3BgybG31rrhkC2w6JiGwn3cp9O6KSGTCZqHjTXQgKDlG27I FzXHMODcBX/t3twPfQXTMVh9otVsOmwZsEmJj85VImqpkjV5IYPolTIUnNIrU8TA Rkx74TQ3ARaNE2H4r8pnNi9aRVT9C5Hks1OzK43EfMrbdEA77v7wmLgPKVYiYrQo sQseyLvSjWyh/USMNofDlo/KB+/mViBOSnA3xqz+gSy7BU3CUBpUPp4o46Tjxgr3 RJu12Y2dOT1ipWG+krusyF4fNmReO88CyUx8DoLXe+vq3CK6xu2P/9YuhnN3yJZH bQIDAQAB -----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 111755749798756584173496259210270670098 . . . . . . . . [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 'GB' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Greater Manchester' . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName) . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Salford' . . . . . . . . . . . . [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 'Sectigo Limited' . . . . . . . . . . . . [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 'Sectigo RSA Domain Validation Secure Server CA' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-02-04 00:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-05-04 23:59:59 +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 'classroom.tomlinson.center' . . . . . . . . [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 17647103044004178111691533040654666086131642644138467402655807583860860432487119428790235310639213417531472624719499809379638285489537002595588500229240033148721057145641005795211573218416276244804961411984273849172321390027299451118784790989086434876629474231105882039974117782288745953431233811042066305733856566819753824104979404848392172672577295561530734163607521782144560196001567263484359020243371723251768681995261429530492289464072689430494395580385796299871327894933110591591910842522575279934181904632355923985735767952257398586793238545211864915255595829560825315625615183185843660707902816474729809332077 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 8d8c5ec454ad8ae177e99bf99b05e1b8018d61e1 . . . . . . . . . . . . . . . . [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) a5dff060de73bd269820a2876fe5cd868bc39ff3 . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.37 (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 2.5.29.32 (certificatePolicies) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (66 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://sectigo.com/CPS' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess) . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (120 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2 (caIssuers) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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.sectigo.com' . . . . . . . . . . . . . . . . [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 (62 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'classroom.tomlinson.center' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.classroom.tomlinson.center' . . . . . . . . . . . . . . . . [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 (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f000760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000017012039c6800000403004730450220554da127e18bf4304ad7feb0f5ef996c9ec721b11ceeb5a4814db59ed792d504022100b9e66f9f14f332b0d777561b6e0234a909b9419b2ec625cd789fbea6cd783d4a0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000017012039c580000040300473045022100c7344ece49b413269029d58bc8b5a244a546f1baf8b062d623dceb947e5dae4002203e78534eb28f9b6c2ae794c6ec998b977358b45f9decf0487f2e3bfcd4f11b76 . . . . [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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