sterling-aeronautics.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:cf:10:92:50:fc:3e:0e:54:bf:55:26:90:83:d4:74:da:ad was issued on by Let's Encrypt.

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=sterling-aeronautics.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:cf:10:92:50:fc:3e:0e:54:bf:55:26:90:83:d4:74:da:ad
Serial Number (int): 331797335113766377257097362029392059226797
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f4:f2:a8:d0:20:a4:b3:63:37:14:72:bd:f0:e8:9a:5d:dc:2a:ec:61
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 0c:9f:31:bf:37:17:7a:fa:3c:a7:b5:c6:53:f3:b1:0a:24:f6:f3:a4
Fingerprint (sha256): ac:f0:cc:dc:98:96:f7:83:b4:09:05:69:cf:3d:23:9b:ef:65:7f:ce:15:3c:cc:a2:d4:ee:08:05:6d:64:ae:84

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 sterling-aeronautics.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for sterling-aeronautics.com

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

sterling-aeronautics.com

Other certificates including the domain name sterling-aeronautics.com

(limited to 100 certificates)

Certificate

The complete raw certificate details for sterling-aeronautics.com 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 331797335113766377257097362029392059226797
 . . . . . . . . [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 2019-05-31 05:35:40 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-08-29 05:35:40 +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 'sterling-aeronautics.com'
 . . . . . . . . [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 745819320795739558427691385137845349365584596701115490627233124757849123236287258748578755538232329577786031665768166780177824652356505184161626960719212621731223501843232179770534133348782708086318367173050056343330842896369796389019683845599435986926281519820562245993046873389123089323453120376017877164208245198758477758390633363801715109768335186136163887496954260224580569405541817482804424163725284663788546921097871540952220485847552141066897120033796466171200509610751913384646934418555978356569383704486066954092002083349002695596569787158412294180992287498509706242677092765697301674104064079525113012369917963196637069597732962752938817782814285300395931472840876266550334737367959372051513527722798793818976729239271447726331260164616686449978606834242910388053521738491669243455262643206094221099040389413553261628076939756697672942036116541107194362633864373027626246158756964618328259066342798536903900213410417751662734314779104786875627692209459841421331386356028191784419355720938595923783185048671896663999273609028532595954576898174970274355110404604412835286765845658886836784972177533827768116184700564677432285293281408880768357673828102415152001900583082515573840800287664749713756031215271303049614497565101
 . . . . . . . . . . . . . . . . . . . . [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)
							f4f2a8d020a4b363371472bdf0e89a5ddc2aec61
 . . . . . . . . . . . . . . . . [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 (28 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sterling-aeronautics.com'
 . . . . . . . . . . . . . . . . [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 (246 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (243 bytes)
							00f1007700747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc560000016b0c99e31a0000040300483046022100d8dfd65b4a59e4a4caba9ab394d817f5f639533d553f7962c7c6306ec9da3ba8022100ed148160c9c36f46d241a5ce91eeb8d3bbda3279839558a5147cd8ab66b0846300760063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016b0c99e3360000040300473045022100d9408fc529c2b33d0694794ac01dfeb2552ce186b616abd456acd993ece82ea7022076b142943be104eb8b012b608e7cbfc0af66b60af88b8d57cdd7b739c59190db
 . . . . [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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