DV SSL/TLS Certificate for mail.fulcruman.co.uk

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the mail.fulcruman.co.uk DV SSL/TLS Certificate

This certificate with serial number 05:15:ec:40:cb:cc:af:ea:b9:eb:72:14:0b:5a:7d:28:2c:8e for mail.fulcruman.co.uk was issued on by Let's Encrypt.

With 9 subject alternative names, this certificate can be used to secure multiple FQDNs. 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 mail.fulcruman.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): 05:15:ec:40:cb:cc:af:ea:b9:eb:72:14:0b:5a:7d:28:2c:8e
Serial Number (int): 443021393611691265678364439223259611278478
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: 34:42:85:56:d0:0b:c1:8c:6c:84:d5:28:18:b2:eb:a8:8a:0a:6a:28
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 86:75:70:17:ff:4c:31:1e:05:b3:50:d4:5b:1a:2c:3f:d1:a9:5b:34
Fingerprint (SHA-256): 3f:27:49:46:af:3c:12:8d:4b:0b:23:33:bb:dc:6f:6c:11:59:49:ab:94:a8:45:f7:62:4f:95:ca:2f:03:88:9e

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/15.crl

Check the revocation status for certificate mail.fulcruman.co.uk
9
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for mail.fulcruman.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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

autodiscover.fulcruman.co.uk
cpanel.fulcruman.co.uk
cpcalendars.fulcruman.co.uk
cpcontacts.fulcruman.co.uk
fulcruman.co.uk
mail.fulcruman.co.uk
webdisk.fulcruman.co.uk
webmail.fulcruman.co.uk
www.fulcruman.co.uk

X.509 Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFzTCCBLWgAwIBAgISBRXsQMvMr+q563IUC1p9KCyOMA0GCSqGSIb3DQEBCwUA
MDMxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQwwCgYDVQQD
EwNSMTEwHhcNMjUwNzA0MDYxMzQ2WhcNMjUxMDAyMDYxMzQ1WjAfMR0wGwYDVQQD
ExRtYWlsLmZ1bGNydW1hbi5jby51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCC
AQoCggEBALlWFmYHottDnEJ9uMkL/ywMRZ0r2f7r1PKQWzyb1ejUD9q6tx52rP6l
fq/qmVLbRPcE7jzr4BUSC6ZDwr1eg5MzBi+8IerioVckNlJuKt8nIz1qLIVj6CTB
PGz6GK+bGAD8Pwg6uXp4KgJ46gGowclJDJK9Hrdfr2Ci2oF73J/mFQZkKM3IpuR+
SUxrBjiYx/9GSPI48EtJfHJxNTx1FUrD6cOgqeMx0aXaSvMBIO7p7JX/4G58uSss
4PlMH9TS/wOx5pcyUZLO9sQZjWM6xkOMq2pIjdWYjyo2LZYbPNrwOqR7DT7ISMcF
qhko9uOD9gXZjCXQRAdOpPD/jjZkbZ8CAwEAAaOCAu0wggLpMA4GA1UdDwEB/wQE
AwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIw
ADAdBgNVHQ4EFgQUNEKFVtALwYxshNUoGLLrqIoKaigwHwYDVR0jBBgwFoAUxc9G
pOr0w8B6bJXELbBeki8m47kwMwYIKwYBBQUHAQEEJzAlMCMGCCsGAQUFBzAChhdo
dHRwOi8vcjExLmkubGVuY3Iub3JnLzCB6AYDVR0RBIHgMIHdghxhdXRvZGlzY292
ZXIuZnVsY3J1bWFuLmNvLnVrghZjcGFuZWwuZnVsY3J1bWFuLmNvLnVrghtjcGNh
bGVuZGFycy5mdWxjcnVtYW4uY28udWuCGmNwY29udGFjdHMuZnVsY3J1bWFuLmNv
LnVrgg9mdWxjcnVtYW4uY28udWuCFG1haWwuZnVsY3J1bWFuLmNvLnVrghd3ZWJk
aXNrLmZ1bGNydW1hbi5jby51a4IXd2VibWFpbC5mdWxjcnVtYW4uY28udWuCE3d3
dy5mdWxjcnVtYW4uY28udWswEwYDVR0gBAwwCjAIBgZngQwBAgEwLgYDVR0fBCcw
JTAjoCGgH4YdaHR0cDovL3IxMS5jLmxlbmNyLm9yZy8xNS5jcmwwggEDBgorBgEE
AdZ5AgQCBIH0BIHxAO8AdQB9WR4S4XgqexxhZ3xe/fjQh1wUoE6VnrkDL9kOjC55
uAAAAZfUR14RAAAEAwBGMEQCIBzsLx2uCi3H14tl0b/5evg6crYx71BqSpg1mLME
Wl6gAiA+6r/Xg7iD2jbKhhCHlo/TQ8kdX0OWO0o5P5vgJRRkHgB2AMz7D2qFcQll
/pWbU87psnwi6YVcDZeNtql+VMD+TA2wAAABl9RHXhYAAAQDAEcwRQIhANcEzzsK
2EIC0b9vLVgO74GJzjMdxmLb/PV966KuqB3kAiAHsQSNfL8oPVrURScl61zr9ik6
hRgi1HhAiew/n0y0pDANBgkqhkiG9w0BAQsFAAOCAQEADX06CK9hK0ibypizEqxf
2wD9w83dvts3JMe7EWVuJPTTGH/afj2AOMk2C6W3reX1rtCzg56+ngtAFHxEg/B8
/Sigay7tI6treQvnypc7dZugpbxnn3pbYOQSMvh9PC14bIhIZb8n0OLwW59n4DOj
EWdf93IFzSnyFu6xWG9mOGaMeVMT2+PqlePV97NJO/t2vekvJwLHpUMow2+qEZH9
vD3HXnWCM5/vG84euhzS/UyDr8fbBKLWUTpwCzf9NFCJ2Iu2szY7fJvkcFLGZrmq
MqSDH8nSBHRID6Iqd/eQJOXqQ8rtqX6FhFlw66/n1UwYz17hYd07UcR2YwxoNvhr
JA==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuVYWZgei20OcQn24yQv/
LAxFnSvZ/uvU8pBbPJvV6NQP2rq3Hnas/qV+r+qZUttE9wTuPOvgFRILpkPCvV6D
kzMGL7wh6uKhVyQ2Um4q3ycjPWoshWPoJME8bPoYr5sYAPw/CDq5engqAnjqAajB
yUkMkr0et1+vYKLagXvcn+YVBmQozcim5H5JTGsGOJjH/0ZI8jjwS0l8cnE1PHUV
SsPpw6Cp4zHRpdpK8wEg7unslf/gbny5Kyzg+Uwf1NL/A7HmlzJRks72xBmNYzrG
Q4yrakiN1ZiPKjYtlhs82vA6pHsNPshIxwWqGSj244P2BdmMJdBEB06k8P+ONmRt
nwIDAQAB
-----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 443021393611691265678364439223259611278478
 . . . . . . . . [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 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-07-04 06:13:46 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-10-02 06:13:45 +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 'mail.fulcruman.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 23396537744368210479370819667104351127074136567182777205017516487861664363479871019594024802919982951679843790159024926032949370490092110541532448648878040973043912388405878089768256252122971017174663413926614317414263903356479478482291682400951375962951933908641856989998969575063481730893221204762035167139836958605850480424391273954098593399932054964416499127704606944307128794750227974334192853163829779180479630021956703575181271883230424510900840745979670387297980782148868024697347647080461511971564375467741841203521857977772954589040431845848993899126169236633780101419823082732594706155909522841125299449247
 . . . . . . . . . . . . . . . . . . . . [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)
							34428556d00bc18c6c84d52818b2eba88a0a6a28
 . . . . . . . . . . . . . . . . [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 c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [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://r11.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 (224 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'autodiscover.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpanel.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpcalendars.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'cpcontacts.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webdisk.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'webmail.fulcruman.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.fulcruman.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 (39 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://r11.c.lencr.org/15.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 (244 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (241 bytes)
							00ef0075007d591e12e1782a7b1c61677c5efdf8d0875c14a04e959eb9032fd90e8c2e79b800000197d4475e11000004030046304402201cec2f1dae0a2dc7d78b65d1bff97af83a72b631ef506a4a983598b3045a5ea002203eeabfd783b883da36ca861087968fd343c91d5f43963b4a393f9be02514641e007600ccfb0f6a85710965fe959b53cee9b27c22e9855c0d978db6a97e54c0fe4c0db000000197d4475e160000040300473045022100d704cf3b0ad84202d1bf6f2d580eef8189ce331dc662dbfcf57deba2aea81de4022007b1048d7cbf283d5ad4452725eb5cebf6293a851822d4784089ec3f9f4cb4a4
 . . . . [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)
		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