rfl.is

Issued by R3

About this certificate

This digital certificate with serial number 03:89:50:83:cb:ee:54:ad:26:d3:22:dc:71:8b:f1:fa:75:b1 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:
  • 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=rfl.is

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:89:50:83:cb:ee:54:ad:26:d3:22:dc:71:8b:f1:fa:75:b1
Serial Number (int): 308062564630212229054626157866904637306289
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 56:27:64:38:a7:c1:02:96:00:d1:b1:51:48:d9:41:82:d2:fc:e6:58
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 31:26:9e:18:de:c0:d5:56:eb:d7:fd:8a:88:b5:68:2d:1a:e2:d9:fc
Fingerprint (sha256): 22:3f:14:9a:d2:99:01:7e:06:88:1a:df:bc:20:63:6d:52:d8:6a:d9:6e:d5:aa:f5:a7:b5:7b:0f:3c:22:b7:ce

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

Revocation information

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

Check the revocation status for certificate rfl.is

2

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for rfl.is

Public Key Algorithm

RSA

Key Size

3072

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

rfl.is
www.rfl.is

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hjalp.rfl.is
rfl.is
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hjalp.rfl.is

Certificate

The complete raw certificate details for rfl.is 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 308062564630212229054626157866904637306289
 . . . . . . . . [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 2023-11-02 11:21:15 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-01-31 11:21:14 +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 'rfl.is'
 . . . . . . . . [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 (3184 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 3175477164925489913652379821787900404761474907485494360769405447953026535454771459040676378315664254930425141236942595309427114253598824274130906380939391969672957436869632319780428432564142015117595896121870276703539212514273933072311067009412017887694690388303117816685743734449035808308429476584818087280293475855178871938930929328226274953565010177117776156325160628919386151890827334662990369192727771563352507890059949180072737649926148169731138407225716199519215729379481292090876221912070223313114666223203019348054417655192866708142671705520430513133241910455965311283663027402757567638714468836085283556447949290970919281895557611409765121332915579614724650622674171685902280321013393887394884706427926494780873017057696429624184621284006882366399903355386978335561981538907818548544840706529054507099432045620162932264443459602235883434562983805743652645024247367259802339767279351219147927367214396914136136656023
 . . . . . . . . . . . . . . . . . . . . [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)
							56276438a7c1029600d1b15148d94182d2fce658
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'rfl.is'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.rfl.is'
 . . . . . . . . . . . . . . . . [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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f00076003b5377753e2db9804e8b305b06fe403b67d84fc3f4c7bd000d2d726fe1fad4170000018b8ffb094e0000040300473045022040e69c30bc2ebabf7f27bb4e2988e4f0b22ff9067d977c460b03e430d77e53cf022100b3a469188f291ede99033a15260a38be5edf591d3c72488d9bc9feb6c03fbfd500760076ff883f0ab6fb9551c261ccf587ba34b4a4cdbb29dc68420a9fe6674c5a3a740000018b8ffb0982000004030047304502203ed862b3d52d4bd492658b343ddd12305cc680efaa743d217a5b42401930ffa5022100a5987f777b4b2c883d191fe392935b47736112184a3246b162264cc9b3f0155f
 . . . . [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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