DV SSL/TLS Certificate for nostromo.io

Certificate is witin its validity period

Issued by Let's Encrypt (R11)

About the nostromo.io DV SSL/TLS Certificate

This certificate with serial number 06:2a:3b:89:0a:45:52:27:3a:a4:b2:56:65:82:a8:53:6b:62 for nostromo.io was issued on by Let's Encrypt.

With 2 subject alternative names, this certificate can be used to secure multiple FQDNs. This DV SSL/TLS Certificate is currently within its validity period but we haven't checked the revocation status of this certificate, you can do this simply on revocationcheck.com. We have found some issues with the compliance of this certificate, they are be shown below. We hope this DV SSL/TLS Certificate review for nostromo.io provides you with the detailed information you were looking for.


We have identified some issues with this certificate:
  • 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)

Let's Encrypt

Organization: Let's Encrypt
Country: US

This X.509 certificate will expire on

Certificate Details

Serial Number (hex): 06:2a:3b:89:0a:45:52:27:3a:a4:b2:56:65:82:a8:53:6b:62
Serial Number (int): 537044711005978089098940195226210553523042
Serial Number Length: 139 bits, 18 octets

Subject Key Identifier: aa:50:0e:08:fe:2d:48:12:c8:01:6f:f8:ff:25:8d:66:9d:42:86:51
Authority Key Identifier: c5:cf:46:a4:ea:f4:c3:c0:7a:6c:95:c4:2d:b0:5e:92:2f:26:e3:b9

Fingerprint (SHA-1): 6c:c5:cb:f1:33:cf:5c:d5:03:11:06:45:09:0a:a5:00:8b:d7:c0:58
Fingerprint (SHA-256): df:5f:7e:de:65:ab:d6:50:00:4f:e6:73:22:5c:95:b7:07:d6:2a:56:f1:16:ae:4b:fa:89:0d:87:b7:74:96:69

Issuing Certificate URL: http://r11.i.lencr.org/

Revocation Information

CRL Distribution Point: http://r11.c.lencr.org/99.crl

Check the revocation status for certificate nostromo.io
2
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details of the X.509 certificate for nostromo.io

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
10
CA Certificate
This is not a CA certificate

Subject Alternative Names

X.509 Certificate

The complete raw X.509 certificate details for nostromo.io 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 537044711005978089098940195226210553523042
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'R11'
 . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-06-08 10:22:37 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2025-09-06 10:22:36 +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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:19|false] PrintableString 'nostromo.io'
 . . . . . . . . [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
 . . . . . . . . . . . . . . . . [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 777529465833690082931556143034341945617676366113082477679847542685376455295300382211769312849783689221431249405938292688976834733199739396407619717740278317598012902074300710079379303545806238844014599380214040613741692021768136598177946927823305886362246856590840492134659995613743409313967023545359490034663465589730208618336409517808977723223659182007784673079222703487824832569742878147960769100761519601707543189252390038076456365790599308932028188543930483436032123320824032296581629889179630486258189860305498998854824871297704817532141890721300410193434080702046116674371034801746413725629974233976205203969937731006606871149329815658517213697995589689574811937325420384210171118506951287947318552333118828288150335459705079785551689630200349431461274287120740112198072776589483653331943855970199015570677793755985431905782598937235670595145029203130096933785306529397999695879116350355416225649662546898647506767679972242074507565198376195258148966503746640691072064203559269226896085375675511283206791482103016084494053222246234381419968170062194468132616734660914397739733284474546874467448337798098510190898802365236432229402537441751748772457488761364613797709562701408524545935085837060885667865868446373378146876265491
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.3.2
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.19
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (20 bytes)
							aa500e08fe2d4812c8016ff8ff258d669d428651
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.35
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (24 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|false] OtherName c5cf46a4eaf4c3c07a6c95c42db05e922f26e3b9
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.1.1
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.5.5.7.48.2
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.i.lencr.org/'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.17
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (32 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'nostromo.io'
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.nostromo.io'
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.32
 . . . . . . . . . . . . . . . . . . . . [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
 . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 2.5.29.31
 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (39 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:0|true] OtherName 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:6|false] IA5String 'http://r11.c.lencr.org/99.crl'
 . . . . . . . . . . . . . . . . [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)
							00f1007600a442c506496061548f0fd4ea9cfb7a2d26454d87a97f2fdf4559f6274f3a8454000001974f45db84000004030047304502210092e35ef9f0ef75c32d93c317f95dfa2518c539be8eab6a5318718c18bcd1bac2022018b291762219f8bff48c1c489db952c9d49e1cd89033f869b04a9cd9e40bdf360077000de1f2302bd30dc140621209ea552efc47747cb1d7e930ef0e421eb47e4eaa34000001974f45e3560000040300483046022100ee879e1349def1601c33f29da9f2bb2394bba01ddd9e8b052d3ecb1c4cc72fef0221008d874810d1cbe124c4285ba48be0a799f2c66d5fa03b3977933ba48999588d08
 . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.2.840.113549.1.1.11
 . . . . . . . . [c:0|t:5|false] NULL []
 . . . . [c:0|t:3|false] BIT STRING (2048 bits)
		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