zonetel.com.sg

Issued by R3

About this certificate

This digital certificate with serial number 03:82:4f:85:61:d0:c3:db:30:6a:5d:d6:95:57:43:2a:e9:32 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=zonetel.com.sg

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:82:4f:85:61:d0:c3:db:30:6a:5d:d6:95:57:43:2a:e9:32
Serial Number (int): 305679267066085737593628771827681644439858
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f0:9c:33:0d:52:b8:e2:f0:e7:c4:a9:b7:cd:e5:5d:0f:db:56:5a:fe
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6

Fingerprint (sha1): 67:cb:f5:99:f3:27:4a:46:49:eb:b3:78:23:36:a7:7a:63:76:40:db
Fingerprint (sha256): 9d:6c:19:b2:bf:1c:50:67:f1:55:86:24:d7:96:68:40:51:b6:f8:f8:e4:82:da:54:79:54:c4:62:60:f7:8d:fb

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

Revocation information

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

Check the revocation status for certificate zonetel.com.sg

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for zonetel.com.sg

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

zonetel.com.sg

Other certificates including the domain name zonetel.com.sg

(limited to 100 certificates)
zone-aws.zonetel.com.sg
zone-aws.zonetel.com.sg
zonetel.com.sg
ipzentrex.zonetel.com.sg
zonetel.com.sg
*.zonetel.com.sg
zone-aws.zonetel.com.sg
gelcccs.zonetel.com.sg
zonetel.com.sg
*.zonetel.com.sg
*.zonetel.com.sg
app.zonetel.com.sg
www.zonetel.com.sg
zone-aws.zonetel.com.sg
zone-aws.zonetel.com.sg
bizsolution.zonetel.com.sg
zone-aws.zonetel.com.sg
ipzentrex.zonetel.com.sg
zone-aws.zonetel.com.sg
*.zonetel.com.sg
zone-aws.zonetel.com.sg
www.zonetel.com.sg
www.zonetel.com.sg
zonetel.com.sg
bizsolution.zonetel.com.sg
www.zonetel.com.sg
gelcccs.zonetel.com.sg
bizsolution.zonetel.com.sg
zone-aws.zonetel.com.sg
zonetel.com.sg
*.zonetel.com.sg
app.zonetel.com.sg
zone-aws.zonetel.com.sg
mss.zonetel.com.sg
zonetel.com.sg
mss.zonetel.com.sg
zonetel.com.sg
zonetel.com.sg
zonetel.com.sg
geli.zonetel.com.sg
app.zonetel.com.sg
zonetel.com.sg
zone-aws.zonetel.com.sg
www.zonetel.com.sg
zonetel.com.sg
zonetel.com.sg
*.zonetel.com.sg
zonetel.com.sg
zonetel.com.sg
app.zonetel.com.sg
www.zonetel.com.sg
zone-aws.zonetel.com.sg
*.zonetel.com.sg
app.zonetel.com.sg
zone-aws.zonetel.com.sg
www.zonetel.com.sg
zonetel.com.sg
zone-aws.zonetel.com.sg
zonetel.com.sg
bizsolution.zonetel.com.sg
gelcccs.zonetel.com.sg
app.zonetel.com.sg
zone-aws.zonetel.com.sg
zonetel.com.sg
www.zonetel.com.sg
zone-aws.zonetel.com.sg

Certificate

The complete raw certificate details for zonetel.com.sg in PEM and ASN.1 format.

Certificate (PEM)

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

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlg6D6a4bjJjKcuDcNZHH
8oDNa0/TsapAcr0v4tABB/2X6hlDdLVQoSJ144kzzF9IJqChpAbT6QKX6MUW2VIH
mABi9lU0Lyfb6i49qL9/BmgxkYiU2r7zYDuSDtrkSAJaw/RYEkDz6xo2e1h+wrPQ
P9hY6GI3YHN5S5FRJg5EmpPf24bz4CRYt4iyp+7QAd/gTqZWS1feqlHVCV3EDymp
MqZ8W4DwgEGeQ/ISf6kCgXT+XvRHP4O0kXNhNfJH90zhsf/Ma9v3sXX8D1vOuy+/
6QtqnGZv4YKU8ZAQnNS29vVx/o/qwQOyFpvRDbCcHVJWVlIdOV4RTETwc3mrNzrh
cwIDAQAB
-----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 305679267066085737593628771827681644439858
 . . . . . . . . [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 2022-12-27 16:42:52 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2023-03-27 16:42:51 +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 'zonetel.com.sg'
 . . . . . . . . [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 18942903498432121756298141664524412781946319897303899350960397528875919725015887031029299628534607274715508955970565319713272635984927027825001634642003390580897748175670858793369669442358552358102751757768294548682741390448203414804391559699883698140289546550111562218891050697973975848751285988594666010937093610140967810700666926376514015540868195311223786919890965193440556161992112962447131832476805348160270739944227527210550455323855415435402135833446570819616492587240865991899098592381725794889090483179731231621323396248446496018702149484038292713065499822220519656093546322524227832299771101260086406472051
 . . . . . . . . . . . . . . . . . . . . [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)
							f09c330d52b8e2f0e7c4a9b7cde55d0fdb565afe
 . . . . . . . . . . . . . . . . [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 (18 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'zonetel.com.sg'
 . . . . . . . . . . . . . . . . [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 (243 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (240 bytes)
							00ee007500b73efb24df9c4dba75f239c5ba58f46c5dfc42cf7a9f35c49e1d098125edb4990000018554ae1535000004030046304402206339946d5bc185fda2aef7e1e1d493fbe51e4dc6532d3afd46ae954e0adec92a0220553270a1bc27fe588adfb68ad3258760074435cbaba79141aeeb338420b856590075007a328c54d8b72db620ea38e0521ee98416703213854d3bd22bc13a57a352eb520000018554ae177600000403004630440220232ef43592882a7fc326c155008cd9618d216dc0282eb3d254dd2616b94c2324022035cc1f87db17da04807a499680d605ade8444c51af662312a07eb7f7807d8e0d
 . . . . [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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