martkos-it.co.uk

Issued by R3

About this certificate

This digital certificate with serial number 03:81:d4:69:3d:e8:27:67:4a:3e:31:41:6f:30:c7:46:4e:50 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:
  • DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
  • Subscriber certificates use of Subject Key Identifier is NOT RECOMMENDED (BRs v2: 7.1.2.7.6)
  • Subscriber Certificate: commonName is NOT RECOMMENDED. (BRs: 7.1.2.7.1)

Certificate Subject

CN=martkos-it.co.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:81:d4:69:3d:e8:27:67:4a:3e:31:41:6f:30:c7:46:4e:50
Serial Number (int): 305515625909978464360009667717320248020560
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 5d:43:26:20:db:66:31:45:61:1e:99:23:69:96:a9:1f:87:72:f1:79
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 2b:76:93:67:40:00:c9:69:bb:e0:21:11:cb:d5:cf:c7:b7:d3:7b:5d
Fingerprint (sha256): 4a:f2:cd:fc:9d:fd:e2:ff:d6:d3:57:08:ad:11:bf:77:7c:cb:69:9a:30:47:ea:22:27:79:a3:6a:f8:89:76:0b

Issuing Certificate URL: http://r3.i.lencr.org/

Revocation information

OCSP Server: http://r3.o.lencr.org

Check the revocation status for certificate martkos-it.co.uk

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for martkos-it.co.uk

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

9 extensions
No unhandled critical extensions

CA Certificate

This is not a CA certificate

Subject Alternative Names

martkos-it.co.uk

Other certificates including the domain name martkos-it.co.uk

(limited to 100 certificates)
www.martkos-it.co.uk
*.martkos-it.co.uk
www.martkos-it.co.uk
martkos-it.co.uk
www.martkos-it.co.uk
martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk
martkos-it.co.uk
www.martkos-it.co.uk
www.martkos-it.co.uk

Certificate

The complete raw certificate details for martkos-it.co.uk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAidHecl86F0XbysN8R9g8
VdhNdNZbcc8X4IWOvrHxfuR/raPdQCIK1ugSOhfPNkklbDt+WtokIXS/1bgOR0wE
algqb9eUbeO6JaADI1euUcPzKHqBzcspboELmVva5CpF5ZfObHMUpKa7GK0AnFOt
Uyii9R+Ybi/kDA7NMoFJIg2ROF/zFNI7UeQUXXft7ur/QbOkOHX1yTDApKrFZ6EQ
hnMTSpLOAZy1ztdsw+gr1CbnILb8vfiBMYEV0eRwAdO5nm2QPwQ0xIUmbTyYmXbQ
3Q2vvceF7lHjE8QuhNSUGr10np7Cf7s9l2iV+S2cFlkTGluWJRzfssEtvSkuMaW+
eQIDAQAB
-----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 305515625909978464360009667717320248020560
 . . . . . . . . [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 'R3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-09-15 21:42:43 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-12-14 21:42:42 +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 'martkos-it.co.uk'
 . . . . . . . . [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 17398138008187126781960127808385397393255069007641125474927081666923326791092004772566357477230867668082066314973211318053511314170911855671887644241455439819229886579845554604773265082215295186832638488278204211486629336543400195458228977157656970096944311576168370005168993751591603715363703388826373193018038515945395455028278107226149172576605333471005858364362322597241779423840486274146464413996269150531324641711436070468910516487926315153691015876342163076126168555803876720102956700430492281545723738732549179858342482613120961219202758654164027014713206939358339951185854812213152655649169392891012676173433
 . . . . . . . . . . . . . . . . . . . . [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)
							5d432620db663145611e99236996a91f8772f179
 . . . . . . . . . . . . . . . . [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 142eb317b75856cbae500940e61faf9d8b14c2c6
 . . . . . . . . . . . . . . . . [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 (73 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://r3.o.lencr.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://r3.i.lencr.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 'martkos-it.co.uk'
 . . . . . . . . . . . . . . . . [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 (12 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 1.3.6.1.4.1.11129.2.4.2
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007600b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018a9b02bf740000040300473045022010c1a487cf25adccd08c6fca674e9cddbb0a7316a26755127b4d2ca182ed499f022100c2bc784f8a0816040a5dbadc16e08e9f442ab8baf53023d6f830b56e5d761d1c0077007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018a9b02bf800000040300483046022100d732be6ab764afae81343ed115964a2303dde82058e361bb09e10527f87b9898022100961bc21a0d820088e0e58648fd6ea239143558e1a5c9a5aff5b3a2a1e199c286
 . . . . [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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