magicstair.com

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:77:2c:11:90:64:35:5a:a7:ca:d5:d5:e4:22:bf:a1:22:45 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=magicstair.com

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:77:2c:11:90:64:35:5a:a7:ca:d5:d5:e4:22:bf:a1:22:45
Serial Number (int): 301889036688339859960978854148753145799237
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: 19:4b:59:fe:08:26:37:d0:89:3d:69:42:e6:2e:31:67:80:35:85:6b
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 90:53:20:74:9a:5f:77:b0:de:27:57:51:f9:a5:fd:6b:dc:46:f9:51
Fingerprint (sha256): 6c:09:f5:7c:0e:d7:27:9e:f8:e6:10:16:a1:90:60:a3:dd:87:b4:e5:8e:d2:48:6b:9f:5b:bf:07:8c:07:e2:20

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 magicstair.com

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for magicstair.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

magicstair.com

Other certificates including the domain name magicstair.com

(limited to 100 certificates)
www.magicstair.com
saltlakestemcelldoctor.com
www.magicstair.com
magicstair.com
magicstair.com
intellidynamics.com
africanera.com
magicstair.com
dynatopia.com
magicstair.com
www.magicstair.com
neollo.com
moviello.com
www.magicstair.com
www.celma.com
www.thriftex.com

Certificate

The complete raw certificate details for magicstair.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 301889036688339859960978854148753145799237
 . . . . . . . . [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 2019-12-18 21:55:55 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2020-03-17 21:55:55 +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 'magicstair.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 704705809953857462974883382382404087308166125271067961473080900719454464541459840669105638110731122617807678163654686193797291904717435302816734060749032336434933500421394986712708660944346979417297293581711804573054355245635609598503645040919256096474753547088327540376912370366809620432529440393702649068494991622807886102108766706139711320179684613676396591901458460798566824700717306094377193659366369661164212596725445708209521765449353626704506274550022219373929615858736122836009914863933362713567338815335172258320762116841769620984511478754751498935564742643422225061250439914291304028806977027573284827418911705153652291602359305178799787247369204468783634169129975502745163013415277877137482900010819212318605814912005994022114157830478644654143517174096305824279856651099146290968298791789764188668128388010780622832865834245101507413738154229330088273838298313773995407418785850340052878049727889819248169833517272162339576817957645115547992391662985574640475878032711104990216174326513207759058333722102529951337113103703232138389427776010751975019287935160016355084156581295401780773830024840059063381190926362977663049398159616047578316716658110610942372482526235702130136265535982638557778614221374745052549205330883
 . . . . . . . . . . . . . . . . . . . . [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)
							194b59fe082637d0893d6942e62e31678035856b
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'magicstair.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)
							00f10077005ea773f9df56c0e7b536487dd049e0327a919a0c84a1121284187596817145580000016f1b3993650000040300483046022100e8b6bab85cd76e9919d02841fb513218af364ea60194441231405b60b3360c6c022100b8164359674549ed024d74dec702656619652eb9696ef25068354df76757d57e00760007b75c1be57d68fff1b0c61d2315c7bae6577c5794b76aeebc613a1a69d3a21c0000016f1b3993810000040300473045022100bb3de62b0110e54df99d0dab1251ff81d9f5a89ac58bb59584ed0089ac6989a302204f860f4cbb99a1151dc89692e93962d7a1939280edde623a02f4506222f4962f
 . . . . [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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