f1.uk

Issued by R3

About this certificate

This digital certificate with serial number 04:d7:70:f6:ca:9d:33:9c:fd:fc:96:e9:d1:a5:69:16:12:58 was issued on by Let's Encrypt.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. This certificate is currently not expired, we haven't checked the revocation status of this certificate but you can do this simply on revocationcheck.com. 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=f1.uk

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate will expire on

Certificate Details

Serial Number (hex): 04:d7:70:f6:ca:9d:33:9c:fd:fc:96:e9:d1:a5:69:16:12:58
Serial Number (int): 421760007565099401356206832746875250414168
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: dd:9f:24:24:78:74:98:2d:c2:31:29:0a:cb:89:9c:dc:d4:82:4d:d0
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 92:3e:76:2c:f5:3c:73:0d:b1:94:e7:15:2a:58:a7:9a:9b:f0:44:80
Fingerprint (sha256): 3d:3e:c5:ec:03:42:2d:51:3a:33:e8:5c:7c:c9:1b:90:c3:85:42:d7:a0:5b:c2:f3:ed:9b:45:6d:66:0b:44:2c

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

Revocation information

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

Check the revocation status for certificate f1.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for f1.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

f1.uk
www.f1.uk

Other certificates including the domain name f1.uk

(limited to 100 certificates)
f1.uk
f1.uk
f1.uk
f1.uk
eventit.uk
f1.uk
f1.uk
f1.uk
f1.uk
f1.uk
f1.uk
f1.uk

Certificate

The complete raw certificate details for f1.uk in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIE4zCCA8ugAwIBAgISBNdw9sqdM5z9/Jbp0aVpFhJYMA0GCSqGSIb3DQEBCwUA
MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD
EwJSMzAeFw0yNDA0MjMxMDE3MjdaFw0yNDA3MjIxMDE3MjZaMBAxDjAMBgNVBAMT
BWYxLnVrMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA8FB7TjfPV58E
rc7mif8nb7KC+ROQsTmynB1YXkZZRdlSU4sJNXfeGk1FFQSqEl84IlZI2VluwNRU
H52OYH9Pg19HKfQOqx2pd+Vp+Dpccm5teCRkNMGjxy0uWNxOtTVJHKTwGxQatRUq
C1OLDy3nk+319+/b6G0ToEYxC625bAmIEkmLU0t1Qro+1NiaYx7ZUvu6xo/oFrYh
Zl+V6OqI8pDm6mG9idY/ET6fz/TxO5XjYHAS8JvKpG/NP3217noIsv7rmETZPCrd
RM4cJhrRIOV8ZlYmX8/usS/KFSWtQbC5RDEkX0IrbIbFny2IoZmznnw7TnCnrKca
EAE/HXDGTwIDAQABo4ICEzCCAg8wDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQWMBQG
CCsGAQUFBwMBBggrBgEFBQcDAjAMBgNVHRMBAf8EAjAAMB0GA1UdDgQWBBTdnyQk
eHSYLcIxKQrLiZzc1IJN0DAfBgNVHSMEGDAWgBQULrMXt1hWy65QCUDmH6+dixTC
xjBVBggrBgEFBQcBAQRJMEcwIQYIKwYBBQUHMAGGFWh0dHA6Ly9yMy5vLmxlbmNy
Lm9yZzAiBggrBgEFBQcwAoYWaHR0cDovL3IzLmkubGVuY3Iub3JnLzAbBgNVHREE
FDASggVmMS51a4IJd3d3LmYxLnVrMBMGA1UdIAQMMAowCAYGZ4EMAQIBMIIBBQYK
KwYBBAHWeQIEAgSB9gSB8wDxAHYAPxdLT9ciR1iUHWUchL4NEu2QN38fhWrrwb8o
hez4ZG4AAAGPCqzMwwAABAMARzBFAiAm7PoyAu1YSpuF9NEZZGPdjZ9ZV926Ifp1
GF5VY5nwzgIhAJWJgpD0TDroDIQ+Qm63s/Gsy6WX30iAo+mhPkMfconBAHcASLDj
a9qmRzQP5WoC+p0w6xxSActW3SyB2bu/qznYhHMAAAGPCqzMyQAABAMASDBGAiEA
oCBG6/zvUqmg+aAkuwnC6M2NPG80QPfv5GkwYMsSL9sCIQDxwvMm8dH15+MiXMWS
B+kexuzppNlRABQaqcNCdq3iwTANBgkqhkiG9w0BAQsFAAOCAQEAuLwBEqog7i7d
nBdNvHZJvpfi22+/DI5kOZGhFl6mg7HOryZkBUJsLaSqN6l8VfzejmdjM6/fsVZM
nOpiFWcOvF+eNu9+gDr4AvkfOwPxNxbDtDf3Som34gykbox3/u9DeF370oWRAsU4
akHLrXdGnK0ttOtN3IbseK6wPMw4bs+L7R49nYTa1TSvkL7PJQx3GU2w+GEZhhRm
4X2OM5WwOFWxIZSaZWUBZ1nGD0zNZHbqbPkCuOoLNYySduaRpwbesmyNLEpj/Izu
Poh09lyawj60+KRwNcDkDhZrwJjN6YLt/ImhX8VhtZ+InVtfM6pePfrV76TeNSWX
oinroDqrAg==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA8FB7TjfPV58Erc7mif8n
b7KC+ROQsTmynB1YXkZZRdlSU4sJNXfeGk1FFQSqEl84IlZI2VluwNRUH52OYH9P
g19HKfQOqx2pd+Vp+Dpccm5teCRkNMGjxy0uWNxOtTVJHKTwGxQatRUqC1OLDy3n
k+319+/b6G0ToEYxC625bAmIEkmLU0t1Qro+1NiaYx7ZUvu6xo/oFrYhZl+V6OqI
8pDm6mG9idY/ET6fz/TxO5XjYHAS8JvKpG/NP3217noIsv7rmETZPCrdRM4cJhrR
IOV8ZlYmX8/usS/KFSWtQbC5RDEkX0IrbIbFny2IoZmznnw7TnCnrKcaEAE/HXDG
TwIDAQAB
-----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 421760007565099401356206832746875250414168
 . . . . . . . . [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 2024-04-23 10:17:27 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-07-22 10:17:26 +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 'f1.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 30336880178669755010229528024624188857512299358487673917985118039285695246860519755347960350889243971358517152238018875856125324083209215813376557819773425329360354757489888075404146600046993465481053629113494957567260645966446469288799096619724174547424706501474179830486309865644982875833958255776051148446494478535706300290633003339547873050034471963805556521258453190180061117683828820029519001050182465759222384985276980911473821905369147652420080991197612724388952628922831490842213018679792377097157228094824507352069046941475310542671694641306979642334019525862787261886842031892646222683207254865978212795983
 . . . . . . . . . . . . . . . . . . . . [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)
							dd9f24247874982dc231290acb899cdcd4824dd0
 . . . . . . . . . . . . . . . . [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 'f1.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.f1.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)
							00f10076003f174b4fd7224758941d651c84be0d12ed90377f1f856aebc1bf2885ecf8646e0000018f0aacccc30000040300473045022026ecfa3202ed584a9b85f4d1196463dd8d9f5957ddba21fa75185e556399f0ce02210095898290f44c3ae80c843e426eb7b3f1accba597df4880a3e9a13e431f7289c100770048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018f0aacccc90000040300483046022100a02046ebfcef52a9a0f9a024bb09c2e8cd8d3c6f3440f7efe4693060cb122fdb022100f1c2f326f1d1f5e7e3225cc59207e91ec6ece9a4d95100141aa9c34276ade2c1
 . . . . [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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