ukmerge.net

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:fa:7c:ee:aa:5b:45:7b:48:82:b7:ab:2e:16:21:ea:ef:19 was issued on by Let's Encrypt.

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=ukmerge.net

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:fa:7c:ee:aa:5b:45:7b:48:82:b7:ab:2e:16:21:ea:ef:19
Serial Number (int): 346573513018885915578488223119116121861913
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 52:01:36:7a:ec:b5:fe:55:60:fd:b8:e7:5d:2e:6e:1a:5e:34:78:85
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 4e:e1:9a:85:40:52:5e:a7:f4:13:12:74:1f:1f:71:2f:b3:b1:2d:bd
Fingerprint (sha256): 93:19:9d:e2:81:b4:7a:05:68:2e:bb:f4:00:ae:bb:de:8f:aa:44:7d:7d:8b:9f:43:db:f2:6d:05:50:8b:eb:ad

Issuing Certificate URL: http://cert.int-x3.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x3.letsencrypt.org

Check the revocation status for certificate ukmerge.net

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for ukmerge.net

Public Key Algorithm

RSA

Key Size

4096

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

ukmerge.net
www.ukmerge.net

Other certificates including the domain name ukmerge.net

(limited to 100 certificates)

Certificate

The complete raw certificate details for ukmerge.net in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----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-----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 346573513018885915578488223119116121861913
 . . . . . . . . [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 'Let's Encrypt Authority X3'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-06-21 02:11:16 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-09-19 02:11:16 +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 'ukmerge.net'
 . . . . . . . . [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 (4208 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 610667112244276896511657770010329226931090004987551354249995432371137392852356584147369061527789719499168994511018136782883149660257599131476037384989566417514731804529010466505537727735853473512419462386106008440648559128625298785209958854623285876142593531295597336487011030213312010490842073253660889576670861482786693537519346066589004065962718600842444758019274164982649051512775220556664604057885701018036404665143448262375400950266764944378274484835790846069697257121626762403516027249137758179543355191401382492679265374712132487932803710790304435065599639918373985936967780240637702512838303269024727689941382845814982513623455269096238110139764736705654120568271395719607034583401354311120896653123606882739831923235663618120713635055486292348067626440358296195746511601497191531303332622501356177941209297767240439558220896530926490180998241242756239793150503948527198893279291926795557609539002961876290182191219335141874020696293376774195095307857001184755678044953204289584685617182797370440969343005932417487432187800240181128067810104294806461622308942894028549189306144850883410376040674786280803463893295816692135657439543182075291058874834156720591784011020540162268373686289028516015652791602997757316544191789641
 . . . . . . . . . . . . . . . . . . . . [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)
							5201367aecb5fe5560fdb8e75d2e6e1a5e347885
 . . . . . . . . . . . . . . . . [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 a84a6a63047dddbae6d139b7a64565eff3a8eca1
 . . . . . . . . . . . . . . . . [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 (99 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://ocsp.int-x3.letsencrypt.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://cert.int-x3.letsencrypt.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 (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'ukmerge.net'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.ukmerge.net'
 . . . . . . . . . . . . . . . . [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 (69 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 1.3.6.1.4.1.44947.1.1.1
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [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 'http://cps.letsencrypt.org'
 . . . . . . . . . . . . . . . . [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)
							00ef007600e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016b78044ec10000040300473045022100a57a552ee4291862577477b8249935ed00bf1f23dccb11f927f40cf9ef7317200220318c5e73dcf858eba81e0efc8e4baa24be97adb9a325ae6b5bf3dc0c7bda4c45007500293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f4780000016b78044dbc000004030046304402200367157fdfd4d7c5ca565b2faecce40ad8beacc225be33eb9519f8e015349677022069529322010461c8837cefacf5c18ae015f5cd1eac11081b42d0fae338212697
 . . . . [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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