blog.happymatches.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 04:5d:60:78:cd:8f:81:dc:4f:0e:49:6e:88:09:e0:86:28:d7 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=blog.happymatches.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 04:5d:60:78:cd:8f:81:dc:4f:0e:49:6e:88:09:e0:86:28:d7
Serial Number (int): 380223636983170425683113629435900857821399
Serial Number lenght: 139 bits, 18 octets

SubjectKeyId: b2:e2:3a:ec:d7:17:67:5b:f5:1c:5a:9f:cf:d2:68:b3:2e:8d:ef:fc
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 95:46:15:e5:c8:fe:cc:8c:30:34:10:bd:57:4f:4f:2f:5a:ea:26:6e
Fingerprint (sha256): df:53:73:90:d9:75:a8:ff:c1:99:42:60:2d:9c:6b:47:f9:b0:b7:dc:a3:ff:e3:ca:50:92:d8:94:50:0c:53:6d

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 blog.happymatches.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for blog.happymatches.com

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

blog.happymatches.com

Other certificates including the domain name happymatches.com

(limited to 100 certificates)
app.brilliantguard.com
www.minedownunder.com
decktool.app
wanderkind.org
dev.karla.ai
www.bmcdashboard.com
www.attine.com
marvy.app
www.vegandetails.com
blog.happymatches.com
www.tattooamos.com
getsuperez.com
mtv-gifhorn-ski.de
recordia-dre.cymru
www.elhalla.com
blog.happymatches.com
www.it700.site
minicursos.axiombr.com
fit.jannik-loeffler.com
admin.pampam.jp
www.maamt.com
blog.happymatches.com
www.uniquekids.club
blog.happymatches.com
www.tattooamos.com
feedback.meetyourmentor.vn
www.excity.in
www.nehad.club
coachee-admin.m1studio.co
cevremde.com
skyptaxi.com
www.asssured.com
nuestrabodaenabril.com
www.anesthesiacharting.com
blog.happymatches.com
www.tophivdating.com
alexmohr.info
www.gearwize.com
www.xlit.co
admin.uqual.dev
translate.weddec.app
jpost.ae
skyptaxi.com
www.coreputters.com
conectar.pe
blog.happymatches.com
www.shipfam.org
5.dasio.com
www.todooz.ch
www.happymatches.com
www.coreputters.com
r.gtw.vc
umashikuniyokocho.for.dinii.jp
sequence.oso-ai.com
edisonstore.co
pdttmassage-beauty.com
jacebabin.com
www.ryanswebdesign.co.uk
www.app.vetlify.in
inquery.hulic-agency.com
blog.happymatches.com
blog.happymatches.com
powerhourdrinking.com
assets.thinkbigtech.com
www.damonmotorcycle.com
www.gearwize.com
www.happymatches.com
www.donttelltrump.com
ridimricany.cz
www.tvfreak.beauty
frequencya.com
widget.beta.hazalp.com
divnectar.com
razvan.timis.dev
cajunscamps.com
blog.happymatches.com
blog.happymatches.com
braintreeng.com
www.doutoracompanha.com.br
ta-portal.proenter.es
happymatches.com
www.asssured.com
mobile.happymatches.com
blog.happymatches.com
blog.happymatches.com
pandemic-log.hippos-test.club
dev.karla.ai
test.ayeq.io
alanescobar.page
www.digitalfrete.com.br

Certificate

The complete raw certificate details for blog.happymatches.com in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAqAyMb2whjfHTWDx98g3F
326O/WZYkOY+p8ZN2vPPlBuAfP0HPjdxUlZ9ppw5zNbWK0pl95IMoJC0wdCUgobg
D2sN/Hk5fIFntev0F2hOgMLDb9eqCAqoALpIx068ooiS1qPhPlet/n2nHHkoSij6
YROx1gVQgmEEJmSVyalnSXXtD2SKffPMtZlpx7kAQsWZId1/nK/Od324dm5wtlJE
5qeFdb9yrh+G9q44507sOKxdJ7GgO+Xd3CN8WNJ6nbWfsXgmFvU31S4V9GEZEXbt
GTEMdEspugPfSM2W7zRceM569P6TRuqZx+XQVPQJBNY6IYaz5qo2jpGUfPIxn7tK
swIDAQAB
-----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 380223636983170425683113629435900857821399
 . . . . . . . . [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 2020-03-09 02:51:26 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-06-07 02:51:26 +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 'blog.happymatches.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 (2160 bits)
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 21214223167341943650985658080151009602391860095937720312303519811531492521912930394279683219905652772863017919255305483146565112330393437105698769194476283624629808159627467827135591678079682699681866410703192696778918930535154058089811166208525849365628736373455176183350161366333552996349803907335013421643706181816855747622371143093569443353564874924442854652583007279357540378526030189749827320359196423110269361604068905309881239622814456731572606253326560575107065063268056019872672053196619250986176013003105303242476587236915152691185016495350417169789837657839855693927111324309423320639205169918432656444083
 . . . . . . . . . . . . . . . . . . . . [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)
							b2e23aecd717675bf51c5a9fcfd268b32e8deffc
 . . . . . . . . . . . . . . . . [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 (25 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'blog.happymatches.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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600f095a459f200d18240102d2f93888ead4bfe1d47e399e1d034a6b0a8aa8eb27300000170bd6b3e510000040300473045022100b4afb92cd297e2cf265587a13b340c50725b1b1c662eec062bf7f60826a4ae3602200787098d8284aee2a2915b13c8db5516070449d94c4458a6d69eeba6f96885e300760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c00000170bd6b3e78000004030047304502203cfa061ef1bfd03582ed72c0bff973668d02c6154514c19feeb2fae2557ab7b5022100a3f9d50dfd515f844f0ae60f321d206ef0c55aa2ff1766ebde2f7658ad639b8e
 . . . . [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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