talkbuilders.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:23:c6:69:d3:2b:c0:1a:a7:35:30:ec:d2:37:e8:49:9d:eb 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=talkbuilders.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:23:c6:69:d3:2b:c0:1a:a7:35:30:ec:d2:37:e8:49:9d:eb
Serial Number (int): 273510477254903836363014998969589305023979
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 1c:4e:93:f1:9e:d0:0f:d6:35:7a:57:22:ad:b1:22:bf:b2:d5:46:97
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): b3:e4:f0:79:81:cd:90:e3:7d:b0:17:73:69:99:c9:e9:be:33:b0:ca
Fingerprint (sha256): 9a:a5:20:28:5f:1a:1a:66:dd:89:52:a0:85:f3:0c:9b:96:a5:cd:3a:e8:bc:2d:fb:aa:2a:cb:d5:bf:0a:60:9a

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 talkbuilders.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for talkbuilders.com

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

talkbuilders.com

Other certificates including the domain name talkbuilders.com

(limited to 100 certificates)
talkbuilders.com
talkbuilders.com
www.airmagicart.com
www.talkbuilders.com

Certificate

The complete raw certificate details for talkbuilders.com 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 273510477254903836363014998969589305023979
 . . . . . . . . [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 2020-03-20 03:06:25 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-18 03:06:25 +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 'talkbuilders.com'
 . . . . . . . . [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 741374026559736837796032588530793238486091426848571518549705379933236258982550245065815317775568040536546498303644856914516643284710250571318678481760157958770781178805613366340936358635226506846795381964662538474959031150245161485361261743148993037563179008244200037329801942352105987989266740669370420911421826959957214941544689316141654448680922079680044989069419193373088411367680889523009895783754820504163561390200940622966556232140479405502680439311007609230033113490711501087001539554095207553596517381789463493730217784060284849893744772885636112109363063820744394199264635645759054240752647615335251138689739805742491820704097506813601761852866369988730294700675093664142045784605073093450731872337827450513096272709894960290336475118155408057072330862373378545130762155811203061706501444431736400601209209812228757314078286664899194118236266872720091643156549326934557303135674798127451842013461292773126434401004990410741949349355445122337949780053416148626913730223065092558435344098259659924153308322201554688559592477081304834787804690340861231647869280515909785171204389890307943324507631376159965169774505340269025805386514477926585269035021632930708203081598268859507141409108055768395953479184529921254141068359093
 . . . . . . . . . . . . . . . . . . . . [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)
							1c4e93f19ed00fd6357a5722adb122bfb2d54697
 . . . . . . . . . . . . . . . . [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 (20 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'talkbuilders.com'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076006f5376ac31f03119d89900a45115ff77151c11d902c10029068db2089a37d91300000170f61ee70a000004030047304502205dd059fd78cf4fef29bcd6d4cb46aee7383fdc02aa1f519d8dc934facd3c793d022100ce275ff8b01791c6d5e58750bb53f37055a912d5402623a6ee8ac03adc3122d300760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170f61ee7100000040300473045022100855242c9ca543ab52e7a906750d86965b4a819f2674adb2ff0e072cbb25c58de02205629f705cd7a3ad7e31a950ab4cbcf85753f760d8455fa2e54a7233c8a0fb7e7
 . . . . [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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