agnostic.tv

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:92:fb:47:7f:5c:43:6d:51:56:17:80:f1:4d:be:56:92:f7 was issued on by Let's Encrypt.

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=agnostic.tv

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:92:fb:47:7f:5c:43:6d:51:56:17:80:f1:4d:be:56:92:f7
Serial Number (int): 311352090828932603730131502165653829620471
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 95:6f:30:6f:77:4f:55:2d:8d:28:eb:67:d5:58:c3:3d:90:bb:65:0e
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 17:20:56:1a:a6:cc:86:14:0d:cb:76:86:68:bd:24:cf:e9:a7:77:84
Fingerprint (sha256): c0:ff:35:99:20:f4:f2:e9:3a:a8:2c:96:7b:c5:fc:df:09:19:b8:14:bc:9c:fc:b0:73:d0:ae:b3:68:c9:2e:bc

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate agnostic.tv

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for agnostic.tv

Public Key Algorithm

RSA

Key Size

4096

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

agnostic.tv

Other certificates including the domain name agnostic.tv

(limited to 100 certificates)
www.agnostic.tv
www.heirloom.biz
agnostic.tv
www.enid.biz
www.agnostic.tv
qhwbft.top
agnostic.tv
www.agnostic.tv
agnostic.tv
enid.biz
www.rising.biz
www.agnostic.tv

Certificate

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

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 311352090828932603730131502165653829620471
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-17 07:39:42 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-15 07:39:42 +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 'agnostic.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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 722572446727494363997903113181770825110264971369430525055725824349384856678113586204686818432268689769865890684505516124965294053952027033287471862393958438160962565853011667245882802054786655845655447703631980157422788048899253472248504552192814398387646344005439594198782917430561672742513090016673353951954959148537056054906571074016447699700392213040740990004254705469663554435872424131988295958981313862121056381877232171656491790311925877954526909483774170160905650464200261813883908694010971539669885579675643060376097242771293766902118751767206884693684010348836996141169718132446830599838949638844899612550294188425363862209539723790227496973154398587951847945414469923193992140748163681342143393329834433793289868849633248874953013437084670761614760449704022390701443833926148861192303191412152017909264340846856264694115050214081467525111145846934641968422354011805777871036782174407103807880907104296575760541182053917285041022161455055832820618657192083205778502076356993116760778525823048641428493031915883477613728737730631738771001428862895454464322043110945032641337987114924965183486107052107079374635614824853155912707506044195229389700473535520398181089396470883056154839307618656554440545567929648248896697540427
 . . . . . . . . . . . . . . . . . . . . [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)
							956f306f774f552d8d28eb67d558c33d90bb650e
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (15 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'agnostic.tv'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00ef007500b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016dd8df661d000004030046304402205c3021f6d66b9e531eb24108b4f0b4a18cbb69a65b0bba8c76d959e242bd859f022024a3c5ac8ffc50635f44a69ca80d0069331205fa67a66b33661e0521bf3dae0a0076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016dd8df66260000040300473045022028b76234f693d6f616f89273b7ca9d3808f9394116393d1856aae62eb0354f6e02210091a18dfe2345c31640787b84a21a468023583d8b76474c51e7a2be6dd70fa152
 . . . . [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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