bestmastic.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d4:ee:fa:68:74:4e:24:43:f2:e6:ca:29:62:2a:e2:d5:ca 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=bestmastic.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d4:ee:fa:68:74:4e:24:43:f2:e6:ca:29:62:2a:e2:d5:ca
Serial Number (int): 333794376038316387183168608849117491418570
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f8:d2:17:37:9c:30:2f:e4:d3:3e:92:73:ba:e1:b6:ab:7a:01:26:93
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): e5:6f:61:07:9d:f8:13:24:ed:0e:2d:b5:8b:f5:7d:eb:49:c4:8a:68
Fingerprint (sha256): 9d:b5:08:30:73:d1:f7:19:06:1a:cd:47:0d:aa:af:85:6d:69:c8:7f:1b:e2:bb:b1:d4:e2:09:3a:65:d9:fa:73

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 bestmastic.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for bestmastic.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

bestmastic.com

Other certificates including the domain name bestmastic.com

(limited to 100 certificates)
bestmastic.com
www.bestmastic.com
mckinneyfencing.com
bestmastic.com
www.bestmastic.com
bestmastic.com
blockvisit.com
www.altongarden.com

Certificate

The complete raw certificate details for bestmastic.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEA2KwcI/XuKUfrmqX/Oxxa
HvzBSPwppe0u8nIUPPnq5VRTjXaJLlctyukLkzpH8o9OgTnxsIXlOhbbycO7BqeP
QDiYkz0OjmbXZKLvE8lAOe0+p+6P9AWgH5NHoGKioWrmK4HsowMCZ/lAex4uh3/M
lsRuF9qZlEuxp0gg78nCI91S4/7lC2VFOjG0gpzDxgULitoXGyndWW6b0I6u7AsC
2UYZQF7y7dXMj+dXAXfLMgrV5nPiR0SlWqtyyxyOXcNIWqG7qmbVeOCfzoebP/20
bpgNxVBiEPttpZQFuLxjFcokxVjtT/mr8F3DZ5548ftBGDrCDC2egKc0R04g8gqv
I6EOBqaIKB90aGjLX54k8M3yWvhvknIB91Ohl+M96CP9RMm6uPtFiRbIz2H1R28i
1VNQOJDXn4+nMKXOWU4cVM1baki2+XNStbBet2JcwM0U2vzA5RL44Jp3hb5NQyD/
u3Qieb9fK5CVWQ5BtBPfInoEuWNQAgfTERHOy+qb7RfbCnRyAgHymDIvpL9YxLoC
39qt0Xb+EQOwkLceQLdxOyHKnVlzq3KLKF4c9qmz+jfUverjdCRqUfABCjk12212
Mu77OUT5IphH44hy/IKD2xjF/GYfC9S1uAWKCgVunuVRTyL1rDxtTO4XAbwctrDq
iyDAQWWMi10W21edqs5NN7sCAwEAAQ==
-----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 333794376038316387183168608849117491418570
 . . . . . . . . [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 2019-12-28 08:08:51 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-27 08:08:51 +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 'bestmastic.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 883945881306942029042843271220404458731581572599268928713325607999167836174313884200251169318455006853332001797677745434658909180461464169751497863074002013735199569457532321811508784101910256290159552803500795280128034109554068838740523886520552479499019162924698133951597577476710486836263565013599260994600189947333524523503567263690246330152168759169869497277801807962435265172018184583772589365862109301288996935169636124854122040382449522090785815118242999347098412935172461266203296137566601190911627215697024336482289543133432345332637653422769610339542089995330641346143392792515890075440131775832378900089191370852840490427032538366611044930868487034547495396663183913798430614410916930352828580926335462334869766577988294190100208115681211690878553856020471400743083855947185403824549580271270227618727474522877252975746166624636776162699836908682599187132790003606067149257510414512886299356065899256902623398392443476359419983742776272143206693089825764014852095621769004794327712279440977173627950909055412073069086485555269439170110001563129808818376440568926712414271980372519354197049600026403171444725647261889217753538873289567187281885808209519674863390527645792021735240540011591147903745057522749979768761694139
 . . . . . . . . . . . . . . . . . . . . [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)
							f8d217379c302fe4d33e9273bae1b6ab7a012693
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'bestmastic.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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb2730000016f4bc3f54b0000040300473045022004346870cd1610f5ba64df188bcaa47152edf0840bdeac189e6b0c5384cae4ed022100edf8c9739d9ee20ea74106635e8eb753261acf0bba46dd1c6dbb9d4f55d0f45a007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016f4bc3f7730000040300483046022100cf4558985cae637c53dbad0decb43a6b39e8bf27e92cb34d497dbf9f4dbe4c0402210089cee5249a818a69b4fcda6e9b6330a2eda889ebecac327454f4c95e0b52369f
 . . . . [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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