ocsports.tv

Issued by Amazon

About this certificate

This digital certificate with serial number 05:c3:5e:9e:83:7a:62:02:2a:9e:3b:b2:70:c7:db:da was issued on by Amazon.

With 5 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=ocsports.tv

Amazon

Organization: Amazon
Organization unit: Server CA 1B
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 05:c3:5e:9e:83:7a:62:02:2a:9e:3b:b2:70:c7:db:da
Serial Number (int): 7660556971581779331336628675570818010
Serial Number lenght: 123 bits, 16 octets

SubjectKeyId: 83:ea:64:e5:03:94:e5:cf:b9:a9:34:d1:4b:ce:6c:5b:63:19:06:63
AuthorityKeyId: 59:a4:66:06:52:a0:7b:95:92:3c:a3:94:07:27:96:74:5b:f9:3d:d0

Fingerprint (sha1): 2f:88:c8:cf:52:f3:66:6e:c0:41:a3:c6:84:42:36:aa:f6:6a:5a:71
Fingerprint (sha256): f1:97:0a:e1:a0:89:82:06:01:3a:fb:2e:13:c8:7e:36:76:30:9d:e1:99:1c:2d:2b:04:1a:90:9f:55:b5:c8:59

Issuing Certificate URL: http://crt.sca1b.amazontrust.com/sca1b.crt

Revocation information

OCSP Server: http://ocsp.sca1b.amazontrust.com
CRL Distribution Point: http://crl.sca1b.amazontrust.com/sca1b.crl

Check the revocation status for certificate ocsports.tv

5

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ocsports.tv

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

10 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

ocsports.tv
*.oc16.tv
*.ocsports.tv
*.mediaportals.spectrum.net
oc16.tv

Other certificates including the domain name ocsports.tv

(limited to 100 certificates)
ocsports.tv
ocsports.tv
contentmanager.myspectrumsports.com
contentmanager.myspectrumsports.com
contentmanager.myspectrumsports.com
ocsports.tv
contentmanager.myspectrumsports.com
ocsports.tv
contentmanager.myspectrumsports.com
contentmanager.myspectrumsports.com
www.myspectrumsports.com
*.mediaportals-prod.spectrum.net
ocsports.tv

Certificate

The complete raw certificate details for ocsports.tv in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwocE2lfktlxP/RCBtWXh
3dWmK+hm52u//k93pxTZaocwYze42PHdJ1bhqI9O19iM5AiSlUCrjlMI9qJOpDhW
rumgTH41RZ7gvGp3qVJtqsqrG1PBb17CJ+l+9Tz8lOp3aEGF7WXvN5aDieZZeO2j
zcJkaPxU3q7ztXRhhWYI6dmOhFfD7GrY9jcyYNo6DuDaKBOpldgGkmCARvrbpY1X
4Oq73bvuA/YlCWraMX5wByVa8wxXPowA2tH59kV7D1aA4kkPIhT0N2A0duN1qDaF
YOLn7PRcl/VFeuqdoXpnKP3oc1XdVQhf3AtKyls++cfg7QJ0CzT84LcTS/GTWV+v
3QIDAQAB
-----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 7660556971581779331336628675570818010
 . . . . . . . . [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 'Amazon'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.11 (organizationalUnitName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Server CA 1B'
 . . . . . . . . . . . . [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 'Amazon'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-02 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2021-04-02 12:00:00 +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 'ocsports.tv'
 . . . . . . . . [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 24556811492424734637964736606706612815772995935909488699290787385934618242334108228427496565114242066779509200330619934364796486927888091026706363107054827430115508151567929254203692156727625826936239116041810759983609707623729389569296129157481301847572798493719249064418648483248933714906273281572899582095072987285309058688384515658030208796024045523667899549262065916010190009533950596737894369635595088675828843661491875451525516787698697102605086343671260361639260243353020740358480021766859737918386568341249986760739352933205479833834369007594555357320766211373739747260029856513191700749896950210032836784093
 . . . . . . . . . . . . . . . . . . . . [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 59a4660652a07b95923ca394072796745bf93dd0
 . . . . . . . . . . . . . . . . [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)
							83ea64e50394e5cfb9a934d14bce6c5b63190663
 . . . . . . . . . . . . . . . . [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 (79 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ocsports.tv'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.oc16.tv'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.ocsports.tv'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String '*.mediaportals.spectrum.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'oc16.tv'
 . . . . . . . . . . . . . . . . [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 2.5.29.31 (cRLDistributionPoints)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (52 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crl.sca1b.amazontrust.com/sca1b.crl'
 . . . . . . . . . . . . . . . . [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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.16.840.1.114412.1.2 (digiCertDVCert)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 (105 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.sca1b.amazontrust.com'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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.sca1b.amazontrust.com/sca1b.crt'
 . . . . . . . . . . . . . . . . [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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef007600f65c942fd1773022145418083094568ee34d131933bfdf0c2f200bcc4ef164e3000001709ce985aa0000040300473045022100c6d2fb0acfc67bfb4f92c7259c8896112bb7ac397fecf305c29a5ec596148eb702204aebb3348f5eddead843ab8f2feb6046581f0bed0dab0542b6d3e044cbe8791a0075005cdc4392fee6ab4544b15e9ad456e61037fbd5fa47dca17394b25ee6f6c70eca000001709ce985be000004030046304402201b7338e3224e61311e8846736a621d84a1fbae45d6f83247daed680df21b3233022007aed54bbef530def898d4a2fcbe37d3748cec9c651c434a18ece9f2c752a5d3
 . . . . [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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