mail.sig21.net

Issued by Let's Encrypt Authority X1

About this certificate


This digital certificate with serial number 01:ee:f2:b8:6c:89:92:2c:9e:21:76:f8:68:71:1d:67:a9:11 was issued on by Let's Encrypt .

With 4 subject alternative names this certificate can be used to secure multiple fqdn's. While the 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.

mail.sig21.net

Let's Encrypt

Organization: Let's Encrypt

Time since certificate expired

This certificate has expire since

Certificate Details

Serial Number (hex): 01:ee:f2:b8:6c:89:92:2c:9e:21:76:f8:68:71:1d:67:a9:11
Serial Number (int): 168422120017945255210189246016104174168337
Serial Number lenght: 137 bits, 18 octets

SubjectKeyId: e8:91:82:db:24:67:d9:18:95:42:d1:31:34:37:4e:f8:88:8f:5f:46
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): 8d:fc:c0:e4:08:cb:c1:a6:0d:6e:10:99:52:9d:bc:25:ec:28:ba:c7
Fingerprint (sha256): 9b:5b:fc:32:3d:ed:e8:0d:7a:66:ed:90:f1:4f:73:16:cf:18:ec:74:aa:80:f5:5e:00:2a:36:9b:a0:0c:61:0e

Issuing Certificate URL: http://cert.int-x1.letsencrypt.org/

Revocation information

OCSP Server: http://ocsp.int-x1.letsencrypt.org/

Check the revocation status for the current certificate on mail.sig21.net
4
DNS Names
0
Email Addresses
0
IP Addresses

Advanced Certificate Properties

Technical details about this certificate


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

8 extensions
No unhandled critical extensions



CA Certificate

This is not a CA certificate

Subject Alternative Names

mail.sig21.net
mail-n.sig21.net
zoo.sig21.net
sig21.net

Certificate

The complete raw certificate details in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE----- MIIGLDCCBRSgAwIBAgISAe7yuGyJkiyeIXb4aHEdZ6kRMA0GCSqGSIb3DQEBCwUA MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMTAeFw0xNTEyMjkxNDAwMDBaFw0x NjAzMjgxNDAwMDBaMBkxFzAVBgNVBAMTDm1haWwuc2lnMjEubmV0MIICIjANBgkq hkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAmPUVRjZ9QHWM3wReinec3HZItCcYXFhG JXSSRjaW9GT3186ZcBVVUl+6/MRyFrsjIxiA06Pd7l3hVrLBoinWZbhSN+RMpd7W 1JXyVRt5uTS0a4VJJpoJZibuyfwgsjVPiHQFh1BHIWedhyf+l1H1ZbENvzEr1K4A ilDWFCUTUwRJbUhHkWyTahH3YjTsnUE4pdmArVEv+dVEnELm2FBKtsHd8uD6dE60 xWnaQVLUT0qixpQs74+E1xuomA8+fCUpcgpxikwHUvhQr2RqjNPiOvBzra+6N+uz pJUO1T4MdhOAYPALN95JdOh1c8X3P/Vuat1qZbA3xaBzLsTD7PwpfrNhEomxNT1p bzJbgBJ10dyTIE7feAPvSYUF+WNSIzeiCR0WGL9ItFk0gxklclqzA8wc4vvU+CvU cGZ3nM4zGDAimK/J1x66p5bjcJhRCiN1eLtLffMEkmxYLjavDF/DZxl0AT05iaSV BQVResiptJppoMLn8ewTcLJspAti1xj8M0F+fip0mEcISRRC0QuamQjphPqS9MFU BgnEug9y1WFr72KiO2R8c6K/CIz19TlRF7HFmrYaU1YXDBbfRTXnCn0FA0zPXtC2 FQQQmDVEGIjwFrKYVevFgnR4tbaYxX0cdqdFdQAUjJMZGmM4Sog3kHxyEvzPdDYP PHo5ZyVXUgECAwEAAaOCAjswggI3MA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAU BggrBgEFBQcDAQYIKwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU6JGC 2yRn2RiVQtExNDdO+IiPX0YwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo 7KEwcAYIKwYBBQUHAQEEZDBiMC8GCCsGAQUFBzABhiNodHRwOi8vb2NzcC5pbnQt eDEubGV0c2VuY3J5cHQub3JnLzAvBggrBgEFBQcwAoYjaHR0cDovL2NlcnQuaW50 LXgxLmxldHNlbmNyeXB0Lm9yZy8wRQYDVR0RBD4wPIIObWFpbC5zaWcyMS5uZXSC EG1haWwtbi5zaWcyMS5uZXSCDXpvby5zaWcyMS5uZXSCCXNpZzIxLm5ldDCB/gYD VR0gBIH2MIHzMAgGBmeBDAECATCB5gYLKwYBBAGC3xMBAQEwgdYwJgYIKwYBBQUH AgEWGmh0dHA6Ly9jcHMubGV0c2VuY3J5cHQub3JnMIGrBggrBgEFBQcCAjCBngyB m1RoaXMgQ2VydGlmaWNhdGUgbWF5IG9ubHkgYmUgcmVsaWVkIHVwb24gYnkgUmVs eWluZyBQYXJ0aWVzIGFuZCBvbmx5IGluIGFjY29yZGFuY2Ugd2l0aCB0aGUgQ2Vy dGlmaWNhdGUgUG9saWN5IGZvdW5kIGF0IGh0dHBzOi8vbGV0c2VuY3J5cHQub3Jn L3JlcG9zaXRvcnkvMA0GCSqGSIb3DQEBCwUAA4IBAQCV+/6bOIi8/D68rMBy6bUm yfITzuZXwXGhvaogGZ0duHZRFJlFduuXcPgABKDvobEphfD8qTTlY5MKYUNL4CD9 9Z80IljB6XwZIbPHDQ4D6P7/JoGNd3aVeDsaeFERDd3MM/GrhJTwQOSOMFGF5dak 9kO97IJZoyIAAQ8g6tTDJcOfgf9dqV9eZo9h/qpTvgFf1+W8ySz7LU0Zhb7L7RsA LFJYkWgXi2moJAM4/H8fiMcguoDis0+93NqpBbx1KPkBIZSf3jF5XAc8mwBtJ6FC BrLEFS8EpLBvU4pp+5xvJ5JiFhO5SxWcKWwYy/w9xp2Fp4eltGPINLJcsKEbOdHn -----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAmPUVRjZ9QHWM3wReinec 3HZItCcYXFhGJXSSRjaW9GT3186ZcBVVUl+6/MRyFrsjIxiA06Pd7l3hVrLBoinW ZbhSN+RMpd7W1JXyVRt5uTS0a4VJJpoJZibuyfwgsjVPiHQFh1BHIWedhyf+l1H1 ZbENvzEr1K4AilDWFCUTUwRJbUhHkWyTahH3YjTsnUE4pdmArVEv+dVEnELm2FBK tsHd8uD6dE60xWnaQVLUT0qixpQs74+E1xuomA8+fCUpcgpxikwHUvhQr2RqjNPi OvBzra+6N+uzpJUO1T4MdhOAYPALN95JdOh1c8X3P/Vuat1qZbA3xaBzLsTD7Pwp frNhEomxNT1pbzJbgBJ10dyTIE7feAPvSYUF+WNSIzeiCR0WGL9ItFk0gxklclqz A8wc4vvU+CvUcGZ3nM4zGDAimK/J1x66p5bjcJhRCiN1eLtLffMEkmxYLjavDF/D Zxl0AT05iaSVBQVResiptJppoMLn8ewTcLJspAti1xj8M0F+fip0mEcISRRC0Qua mQjphPqS9MFUBgnEug9y1WFr72KiO2R8c6K/CIz19TlRF7HFmrYaU1YXDBbfRTXn Cn0FA0zPXtC2FQQQmDVEGIjwFrKYVevFgnR4tbaYxX0cdqdFdQAUjJMZGmM4Sog3 kHxyEvzPdDYPPHo5ZyVXUgECAwEAAQ== -----END PUBLIC KEY-----

ASN1 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 168422120017945255210189246016104174168337 . . . . . . . . [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 X1' . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2015-12-29 14:00:00 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2016-03-28 14:00:00 +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 'mail.sig21.net' . . . . . . . . [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 624011569533384644291909925844087549597443039853780042083215813799528011049319881724641702124185830432030974990023335809290617536004752126499877025146114537953683514121013972937379149666557685377541078725528096318767720203478497021315187720663444246192920291343724166614312667555020928300649975707529858232911833241318219104511173902960145715031080916963673720112591304360952955101047720877678542187227328194560542545809188119294616705268324894309632253805175917128666842219016216143887931795081497873758374040182622136592078909538685243245643195842459768527600728438300907156486837744352159706740997893113530131086942916690621161932933020865015358686966133549771938967559215019534259609171377742591454401567900178353711439608056389707992481479917063644962080147520319276119449086840266541570776723560126116966478737741962553046982991369896671121971094018622783024458660759637110740569350197557156490653491637554918623969754208058689144938017161094542060349704093720831505740169253848874359481214047969691350863044229749418244681350079454874222677949268125917488551494280494281894015187167292168818779203990320790634757689505555244018979596618528012636409138282731616664696096624419468101697597532968416247419668355713616077965971969 . . . . . . . . . . . . . . . . . . . . [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) e89182db2467d9189542d13134374ef8888f5f46 . . . . . . . . . . . . . . . . [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 (100 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-x1.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-x1.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 (62 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail.sig21.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'mail-n.sig21.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zoo.sig21.net' . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'sig21.net' . . . . . . . . . . . . . . . . [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 (246 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 1.3.6.1.5.5.7.2.2 (unotice) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:12|false] UTF8String 'This Certificate may only be relied upon by Relying Parties and only in accordance with the Certificate Policy found at https://letsencrypt.org/repository/' . . . . [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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