kendallandco.co.uk

Issued by Sectigo RSA Domain Validation Secure Server CA

About this certificate

This digital certificate with serial number dc:7d:ab:a4:9c:d9:f9:40:b8:aa:aa:72:6f:26:fb:bb was issued on by Sectigo Limited.

With 2 subject alternative names this certificate can be used to secure multiple fqdn's. 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=kendallandco.co.uk

Sectigo Limited

Organization: Sectigo Limited
State / Province: Greater Manchester
Locality: Salford
Country: GB

This certificate has expire since

Certificate Details

Serial Number (hex): dc:7d:ab:a4:9c:d9:f9:40:b8:aa:aa:72:6f:26:fb:bb
Serial Number (int): 293082677514002397765536421592540052411
Serial Number lenght: 128 bits, 16 octets

SubjectKeyId: 1a:bd:30:52:15:e7:0d:05:d7:63:1b:bb:20:8c:34:62:23:4b:61:c8
AuthorityKeyId: 8d:8c:5e:c4:54:ad:8a:e1:77:e9:9b:f9:9b:05:e1:b8:01:8d:61:e1

Fingerprint (sha1): b9:db:49:9d:e3:10:f1:df:f7:9c:04:42:78:47:a9:c6:c5:fe:c1:e0
Fingerprint (sha256): 4f:63:bc:95:68:de:59:e2:1b:10:98:1e:90:cf:bb:07:21:25:62:32:b1:8c:2b:31:63:3a:78:8d:ba:4b:2f:01

Issuing Certificate URL: http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt

Revocation information

OCSP Server: http://ocsp.sectigo.com

Check the revocation status for certificate kendallandco.co.uk

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for kendallandco.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

kendallandco.co.uk
www.kendallandco.co.uk

Other certificates including the domain name kendallandco.co.uk

(limited to 100 certificates)
www.kendallandco.co.uk
kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
www.kendallandco.co.uk
www.kendallandco.co.uk
www.kendallandco.co.uk
www.kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
kendallandco.co.uk
www.kendallandco.co.uk
www.kendallandco.co.uk

Certificate

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFyzCCBLOgAwIBAgIRANx9q6Sc2flAuKqqcm8m+7swDQYJKoZIhvcNAQELBQAw
gY8xCzAJBgNVBAYTAkdCMRswGQYDVQQIExJHcmVhdGVyIE1hbmNoZXN0ZXIxEDAO
BgNVBAcTB1NhbGZvcmQxGDAWBgNVBAoTD1NlY3RpZ28gTGltaXRlZDE3MDUGA1UE
AxMuU2VjdGlnbyBSU0EgRG9tYWluIFZhbGlkYXRpb24gU2VjdXJlIFNlcnZlciBD
QTAeFw0yMDAzMjMwMDAwMDBaFw0yMDA2MjEyMzU5NTlaMB0xGzAZBgNVBAMTEmtl
bmRhbGxhbmRjby5jby51azCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB
AJYaSSGOcMrpZQ5YHK52LoAHAnWPeIkVPVtLhLA9roxyzZrLhadvyGpLqk1XOb9d
Fqx8eE7qkSLgH230IEou/0sHjsgBpjNyjRsECCW6vf0rJeCT1wPkJmJcVxSiHmus
ALbZAgbGiL++RRzeGQvscVnZiQsE6lFAKH6qdW+i81JlxcTCaoYcy0LE1VQmmZoB
1xkf1qmzbunyxU39lCm3dGGq8TTiCOZ8f6cLXlVFkAIHC7kpLCDwssMjNue8RIhG
5N2gIelDLLidYia+UWeTYR6S9VDyGvrk818y52bs8EIJJ+hKjTs50ll+iq6QouNB
63KK97Cdzx7GuiXPHTHWK/ECAwEAAaOCApEwggKNMB8GA1UdIwQYMBaAFI2MXsRU
rYrhd+mb+ZsF4bgBjWHhMB0GA1UdDgQWBBQavTBSFecNBddjG7sgjDRiI0thyDAO
BgNVHQ8BAf8EBAMCBaAwDAYDVR0TAQH/BAIwADAdBgNVHSUEFjAUBggrBgEFBQcD
AQYIKwYBBQUHAwIwSQYDVR0gBEIwQDA0BgsrBgEEAbIxAQICBzAlMCMGCCsGAQUF
BwIBFhdodHRwczovL3NlY3RpZ28uY29tL0NQUzAIBgZngQwBAgEwgYQGCCsGAQUF
BwEBBHgwdjBPBggrBgEFBQcwAoZDaHR0cDovL2NydC5zZWN0aWdvLmNvbS9TZWN0
aWdvUlNBRG9tYWluVmFsaWRhdGlvblNlY3VyZVNlcnZlckNBLmNydDAjBggrBgEF
BQcwAYYXaHR0cDovL29jc3Auc2VjdGlnby5jb20wggEDBgorBgEEAdZ5AgQCBIH0
BIHxAO8AdgAHt1wb5X1o//Gwxh0jFce65ld8V5S3au68YToaadOiHAAAAXEHK5kc
AAAEAwBHMEUCIGe8fJ7mTLS+77lO2vNROiF6mYSKVrBwjrSk38YOSo1+AiEAo2ul
LJ9zZ1FfSE+vVN7hJvs4uuIoQSQviuxRlv82bqcAdQDnEvKwN34aYvuOyQxhhPHq
ezfLVh0RJlvz4PNL8kFUbgAAAXEHK5l2AAAEAwBGMEQCIFzJWH7aiwCiTX50S0Gs
uNEomFDmzuKbrN9JUKsu8/dLAiAoGlOCXvmNSGJ0hwwROJXJm7hY7siMOIQIzNW5
loiRkTA1BgNVHREELjAsghJrZW5kYWxsYW5kY28uY28udWuCFnd3dy5rZW5kYWxs
YW5kY28uY28udWswDQYJKoZIhvcNAQELBQADggEBAAYqX5AimMGAbzRa1+muOyC8
WtE0fiB1MuvTVsF4/bw3Y2iq0UHtf00qcW7hVFpibWK2a3F+B/eKMN1h0qACYTcJ
q5BJlohb8+k5lFgLx/msI1E6fHD1VYSrGMnvwopqUv/WgIdBEy+EprqMoPJCCIaj
GA6GlZgBtz2qY9DCAJkXpoZsbYREOeWDcKOoDRMiO9twFulZ6ensKmPlffO1Gmxw
E0Wnft3bd2cbT9OyY9OuG0JATDpS0CivJkdWKVm166NhaQqzhKeASCFvnsVb1Qi9
IFrndacPfBYg973ChGNcb2w9WiODwk+0B9PQpckNTVS2gLNSf/TlqpH13ULH5LI=
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlhpJIY5wyullDlgcrnYu
gAcCdY94iRU9W0uEsD2ujHLNmsuFp2/IakuqTVc5v10WrHx4TuqRIuAfbfQgSi7/
SweOyAGmM3KNGwQIJbq9/Ssl4JPXA+QmYlxXFKIea6wAttkCBsaIv75FHN4ZC+xx
WdmJCwTqUUAofqp1b6LzUmXFxMJqhhzLQsTVVCaZmgHXGR/WqbNu6fLFTf2UKbd0
YarxNOII5nx/pwteVUWQAgcLuSksIPCywyM257xEiEbk3aAh6UMsuJ1iJr5RZ5Nh
HpL1UPIa+uTzXzLnZuzwQgkn6EqNOznSWX6KrpCi40Hrcor3sJ3PHsa6Jc8dMdYr
8QIDAQAB
-----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 293082677514002397765536421592540052411
 . . . . . . . . [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 'GB'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.8 (stateOrProvinceName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Greater Manchester'
 . . . . . . . . . . . . [c:0|t:17|true] SET, SET OF 
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.4.7 (localityName)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'Salford'
 . . . . . . . . . . . . [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 'Sectigo Limited'
 . . . . . . . . . . . . [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 'Sectigo RSA Domain Validation Secure Server CA'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-23 00:00:00 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-21 23:59:59 +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 'kendallandco.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 18948707691036088328373359057982002333979625411282772410613514095970776188561450439798197904705535995659882013107228613574823953039616042096565138576585537135929679806191914661196297891380205133183671121273911785128596426994283756302276294935464890062863337740807526870825788662841706869594978866626408799026868812910952013221890841312763220896710699674380974251030204891804205731291834229028697513373996659665292477916881598489769386963496228835210504481500969589331776701748971224137445121291750817156729504782456676281176143113575159161286584129150288930759653204681055815143534949947822042254641082925072808029169
 . . . . . . . . . . . . . . . . . . . . [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 2.5.29.35 (authorityKeyIdentifier)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName 8d8c5ec454ad8ae177e99bf99b05e1b8018d61e1
 . . . . . . . . . . . . . . . . [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)
							1abd305215e70d05d7631bbb208c3462234b61c8
 . . . . . . . . . . . . . . . . [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 2.5.29.19 (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 2.5.29.37 (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 2.5.29.32 (certificatePolicies)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (66 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.6449.1.2.2.7
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'https://sectigo.com/CPS'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 1.3.6.1.5.5.7.1.1 (authorityInfoAccess)
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (120 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 (caIssuers)
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://crt.sectigo.com/SectigoRSADomainValidationSecureServerCA.crt'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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.sectigo.com'
 . . . . . . . . . . . . . . . . [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)
							00ef00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000171072b991c0000040300473045022067bc7c9ee64cb4beefb94edaf3513a217a99848a56b0708eb4a4dfc60e4a8d7e022100a36ba52c9f7367515f484faf54dee126fb38bae22841242f8aec5196ff366ea7007500e712f2b0377e1a62fb8ec90c6184f1ea7b37cb561d11265bf3e0f34bf241546e00000171072b9976000004030046304402205cc9587eda8b00a24d7e744b41acb8d1289850e6cee29bacdf4950ab2ef3f74b0220281a53825ef98d486274870c113895c99bb858eec88c388408ccd5b996889191
 . . . . . . . . . . . . . . . . [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 (46 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'kendallandco.co.uk'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.kendallandco.co.uk'
 . . . . [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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