www.zajac.boston

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:d8:fa:37:06:4e:26:d9:e2:17:81:71:a4:f8:b6:6a:dd:b3 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=www.zajac.boston

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:d8:fa:37:06:4e:26:d9:e2:17:81:71:a4:f8:b6:6a:dd:b3
Serial Number (int): 335170441753363174564693270678277020376499
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: b9:4a:43:15:e1:89:43:35:9d:22:2e:32:1d:8c:be:2d:74:e6:e6:b4
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 56:ce:c0:94:58:d6:cd:37:bd:ac:16:2b:4e:ba:ec:c0:49:21:d9:32
Fingerprint (sha256): c4:30:51:46:45:3d:01:20:fc:a7:7c:02:d0:3e:34:49:27:2a:b5:73:56:26:dc:54:72:1b:bb:3e:0f:29:df:c7

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 www.zajac.boston

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.zajac.boston

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

www.zajac.boston

Other certificates including the domain name zajac.boston

(limited to 100 certificates)

Certificate

The complete raw certificate details for www.zajac.boston 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 335170441753363174564693270678277020376499
 . . . . . . . . [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 2019-10-23 19:56:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-01-21 19:56:55 +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 'www.zajac.boston'
 . . . . . . . . [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 886673018720565858479261518399006284635719703460659679856843246113103095759842092401770751692312996192959294325639826588280555273707603072984583687911845078859421070484591092322750959206693633962494809880374598392940327697705149269246912728933153274544484986342463139246329252713333977072898267573447193941421874526992409946670597020855031685098507392292379329736162715316498397210371239912236626270715199186137963848254122207103014161106830577804430468312913062672391018253697447363077044433426628748155470210354500422214759546871762421280290153455709335390535963612887155975482296942180956956064901155292046018387324774332363530497009979057196537488759390184945560017479005132991881809462476435307277361218113180955884405951877130296898912499955659999593609132008924938086956869323453312939879256631601540892675527637488950024122701768229378964701441870213699436974270047097478239191309705502372392000605842857587320415868368437100585182209138206710613323054481797671649068323855428899619015908072624005210927961049253138586468323877697133098772137571015968325802733102021641260085872122565663503125967987425916574381745305926966302556255690624214291447673196751278928610216192412142431143767661690489195494622319008279872873663789
 . . . . . . . . . . . . . . . . . . . . [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)
							b94a4315e18943359d222e321d8cbe2d74e6e6b4
 . . . . . . . . . . . . . . . . [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 'www.zajac.boston'
 . . . . . . . . . . . . . . . . [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)
							00f10076005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016dfa687d8400000403004730450220096d1e19c41000bff4fc3a0cb628fdb876ed548f6c2a8eea73705e7d86f361b7022100a8ed896932f6ac86af7bb4aea78a5db8bc073710e1d47b3210a9141dee6cead8007700b21e05cc8ba2cd8a204e8766f92bb98a2520676bdafa70e7b249532def8b905e0000016dfa687d820000040300483046022100cdfd9e7fed6ca0d08b89c339eef3d9a48501501d8577f7ce7fcbe77ae5dc30a3022100e4a8d61d3bf1b4e9a4400a43f291cd93ab73d921f0bfbe07a6eb0c5b985db07a
 . . . . [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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