DV SSL/TLS Certificate for www.colinbarker.co.uk

Certificate is witin its validity period

Issued by Let's Encrypt (R10)

About the www.colinbarker.co.uk DV SSL/TLS Certificate

This certificate with serial number 05:91:27:ca:c5:64:b4:91:a4:68:80:f6:65:22:6a:33:f9:70 for www.colinbarker.co.uk was issued on by Let's Encrypt.

This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for www.colinbarker.co.uk provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 05:91:27:ca:c5:64:b4:91:a4:68:80:f6:65:22:6a:33:f9:70
Serial Number (int): 484955265601751737732746078036810047682928
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 0c:57:a9:bf:ef:f4:b6:95:5e:77:b8:9b:34:32:4b:17:4a:5e:25:ac
Authority Key Identifier: bb:bc:c3:47:a5:e4:bc:a9:c6:c3:a4:72:0c:10:8d:a2:35:e1:c8:e8

Fingerprint (SHA-1): d4:c8:b1:5b:0a:24:bf:f4:ff:fe:1c:12:87:47:1e:68:05:4c:bc:12
Fingerprint (SHA-256): 56:6c:bf:c1:8f:6d:9b:d3:ed:90:3e:12:5d:42:89:01:99:c4:29:4c:1e:51:78:fd:c1:2a:21:4a:fb:40:e7:82

Issuing Certificate URL: http://r10.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r10.c.lencr.org/113.crl

Check the revocation status for certificate www.colinbarker.co.uk
1
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for www.colinbarker.co.uk

Public Key Algorithm
RSA
Key Size
2048
Signature Algorithm
SHA256 with RSA
Key Usage
Key Encipherment
Digital Signature
Extended Key Usages
Server Authentication
Client Authentication
Extensions
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

www.colinbarker.co.uk

X.509 Certificate

The complete raw X.509 certificate details for www.colinbarker.co.uk in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAnAjqFnCPc2gUG5cezLVd
dLj1HQJJYOeMIpvcJARV5Ye7F2U7ZhI6w146AS5sB0n4ASiRuxt/GQYlpX63pyQ8
DfahvhwR+ENUmDEKo2iRu2mGnwXXoF0ysOrhXicV/lGOOExLkBqbr5/fVipQW0sT
xBtL4Qqt802hNJeOxEbo8CTTm1h+l92lkAMaai4CnaTcBupS5FrlxPsXQuxJD447
voZWOB9CI72ziK4AFZOiezIAS02HY5VQzrj0LVTTrxF9f8Fqjqe2NWFYJN8fXm3w
eSIePfYy61oDY4SbIzvIo91ofPMNyZTXqY+vRa8E2NuorEyvtvF0xtkLhpzXq9E3
1wIDAQAB
-----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 484955265601751737732746078036810047682928
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R10'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-05-14 00:25:04 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-08-12 00:25:03 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'www.colinbarker.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
 . . . . . . . . . . . . . . . . [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 19697571431598387707386208630835783511279836303197738702839547935094415714323740222283117418195952865479903069098589962278179958934697283453227143283299394904008371945580894436079998389597700232713401463110295284021204880917099534961126596725682223882006713227034185156396867841026185115889361040666646030521493620639017202952221269090963296570095499865646907915408238099172638239823128972463352051672694749185433777953242577329743414719050897131367651703229363034038472295204436432849094239171760333424891569367229006971852380470698798595274056489834081441348038829365047466655252240870993620953042249616958541608919
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							0c57a9bfeff4b6955e77b89b34324b174a5e25ac
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName bbbcc347a5e4bca9c6c3a4720c108da235e1c8e8
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.colinbarker.co.uk'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (40 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r10.c.lencr.org/113.crl'
 . . . . . . . . . . . . . . . . [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)
							00f00076000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa3400000196cc63ccd100000403004730450221009c917e7ea659bd55482504a10cf59f912495bbff108754e5b5f8649f840087de02200202a1c8ed44323d7cbac0db17d48e382de3883b3c7f3626fbe962b777464d42007600af181a28d68ca3e0a98a4c9c67ab09f8bbbc22baaebcb138a3a19dd3f9b6030d00000196cc63ce9800000403004730450220357fc6398a94301fba94610d9a4eb3c2fbcd15754dd6e2d9697902d9c4de4d18022100d6c3f0ad193a0bb8cbe4480a7347140047d99abebc964f0e101804cda5839349
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		002b725ae861f728f9e337e10f8cc9203ff7c4031a07efa3d266c8bbca96c62e3759694a2ab2f5a92b301701b778da56f83b03720eaff170c140f722b389883336d7bafdcf4a026fdfca69a6664ac9a4f327065aaa70a04b388b1742a1eb5d6e30ee3aae0ca657551b89a9eb09af3a4cfcb84345ea1cabc7dafad9f880ca954bb0d0411d978bef6ad03f68d32dd07211e11da938fb20e69fe5fa9360372ee9122f8fe25474b5c374221b913eb2ad926906eda482f953ef1299eebabc784ccb57ca75cfa9f9f23c74d7dcbfa309ea3426d0ecac469da04729a12cd623f437591835238965c3cdbf59f8b35b4231cfc2d02dff53ad812b3bf19f73ab88103d930143