www.zonetel.com.sg

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:32:e5:80:52:1d:7e:c7:51:c2:c6:94:55:5d:d0:84:77:59 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=www.zonetel.com.sg

Let's Encrypt

Organization: Let's Encrypt
Country: US

This certificate has expire since

Certificate Details

Serial Number (hex): 03:32:e5:80:52:1d:7e:c7:51:c2:c6:94:55:5d:d0:84:77:59
Serial Number (int): 278656035631854741591802748561791601899353
Serial Number lenght: 138 bits, 18 octets

SubjectKeyId: f5:75:d1:b2:98:a5:bf:cc:0f:c9:2c:83:d9:47:f6:cb:7d:38:b8:b0
AuthorityKeyId: a8:4a:6a:63:04:7d:dd:ba:e6:d1:39:b7:a6:45:65:ef:f3:a8:ec:a1

Fingerprint (sha1): a0:83:00:d1:f9:df:73:b3:76:1e:04:0a:07:db:1f:0b:ed:6a:b0:14
Fingerprint (sha256): 57:0b:a6:69:f9:0d:1f:35:d4:4b:3c:9a:d4:89:2c:fc:09:b9:a9:e9:ae:78:1e:a5:59:ca:5b:a0:62:91:3a:55

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 www.zonetel.com.sg

1

DNS Names

0

Email Addresses

0

IP Addresses

Advanced Certificate Properties

Tehnical certificate details for www.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

www.zonetel.com.sg

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(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 www.zonetel.com.sg in PEM and ASN.1 format.

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFXjCCBEagAwIBAgISAzLlgFIdfsdRwsaUVV3QhHdZMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTA3MTkxMjA0MzJaFw0x
OTEwMTcxMjA0MzJaMB0xGzAZBgNVBAMTEnd3dy56b25ldGVsLmNvbS5zZzCCASIw
DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAIxy6zBqKxQQGJd9z1lrEhGzV+a6
uPMaI7dhkUb2nyDGNMGdnQFDoHpcJeDYm7ZZWV1Ri6nnX8FI5NerzKSfCDcbrguG
rsnuBfxZJckMp6sOj9Gs0YDip7gw+Vvzvh9ABK3nNX1gR2tytCcCfyB39f2vQKTU
LKGIYuw3hgnvhte01WoNroFUl0ZvR2zGnwX+Byyl1SWZMJQodkUKEyJghog/x4mG
RCp8hcDyPfzjc34kHLIP/7njjXLmGpw4SCoYCjRJ1yFFFHQ7AltrwV2OCg3mpBVg
ShabLykpr8Pf0W7lLqD1uu61pnG4emeMJ+uxXmgbPiNHPBNTlvGVEjtqd3cCAwEA
AaOCAmkwggJlMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI
KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU9XXRspilv8wPySyD2Uf2
y304uLAwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH
AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5
cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5
cHQub3JnLzAdBgNVHREEFjAUghJ3d3cuem9uZXRlbC5jb20uc2cwTAYDVR0gBEUw
QzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDov
L2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEGBgorBgEEAdZ5AgQCBIH3BIH0APIAdwDi
aUuuJujpQAnohhu2O4PUPuf+dIj7pI8okwGd3fHb/gAAAWwKVYY1AAAEAwBIMEYC
IQDa/VcgWAAeCIXjRqzXXd2DVYXScerTu1w+aDPbF8oyHAIhAL1mB/oPe6EppL2s
vWDnm4ECpLL997TV8sbXANlvgTebAHcAY/Lbzeg7zCzPC3KEJ1drM6SNYXePvXWm
OLHHaFRL2I0AAAFsClWGQAAABAMASDBGAiEAmWpJKOZU1JamvIKKbGWGPN1Wq1Y9
bGHsNLH4KnocxusCIQCfO7B7fYVs8Yso5YECYNpHMlhSY42Khf+3Ac7Q7PoyxDAN
BgkqhkiG9w0BAQsFAAOCAQEAmIjLterjIYUTiHA3rgssQIW3+aqX0npyIhG90zK9
PaTSYj9BYITOgkhTr0cv4zdctKG5jbXvnm7nrGhxioSUC1Z809ekdFVuc6gO8pgt
xnTPanNb2Xcy67iDMcpfvc+5wU9imssspuWKN3rIRiHU8kRTq2F8J546bvrYA3gC
9rUBhEghBHX998vuizBTqKQ6Y3hPZdEQE1X5BMPtEIXMxESUw1Omu09CdL9A08l7
WOx/k5mmSCsMxfHq6c0y6h7dxJMXfV9qtQ8uOgq8ZJXaDNtMAExKrots8/tVt3Nh
PZ8FWCnzXoUFzpjqAU+0hSnoerH0lNF86At74cTJCK/w/Q==
-----END CERTIFICATE-----

Public Key (PEM)

-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAjHLrMGorFBAYl33PWWsS
EbNX5rq48xojt2GRRvafIMY0wZ2dAUOgelwl4NibtllZXVGLqedfwUjk16vMpJ8I
NxuuC4auye4F/FklyQynqw6P0azRgOKnuDD5W/O+H0AErec1fWBHa3K0JwJ/IHf1
/a9ApNQsoYhi7DeGCe+G17TVag2ugVSXRm9HbMafBf4HLKXVJZkwlCh2RQoTImCG
iD/HiYZEKnyFwPI9/ONzfiQcsg//ueONcuYanDhIKhgKNEnXIUUUdDsCW2vBXY4K
DeakFWBKFpsvKSmvw9/RbuUuoPW67rWmcbh6Z4wn67FeaBs+I0c8E1OW8ZUSO2p3
dwIDAQAB
-----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 278656035631854741591802748561791601899353
 . . . . . . . . [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 2019-07-19 12:04:32 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-10-17 12:04:32 +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 'www.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 17730031221981370979995858028581423187717474730045660309725779205827390689781088241095734638017494988451118073278772220507561307129805618894048154463399173432611889521699767294971873701611574950030673420515712822629028490766472880806282775242081423118412189842799713850120610851288085571432698555179624126427970746408814612207680198209903272872745334612521143095229889134841988856327143487357651936469461771777176270279002986563656106307395112951193162441517265611254889915352032382624633586747653264590458071109023994107045508516152667495733127668396033611762409842935265525609310226404555028924195570929799128577911
 . . . . . . . . . . . . . . . . . . . . [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)
							f575d1b298a5bfcc0fc92c83d947f6cb7d38b8b0
 . . . . . . . . . . . . . . . . [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 (22 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF 
 . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'www.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 (247 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (244 bytes)
							00f2007700e2694bae26e8e94009e8861bb63b83d43ee7fe7488fba48f2893019dddf1dbfe0000016c0a5586350000040300483046022100dafd572058001e0885e346acd75ddd835585d271ead3bb5c3e6833db17ca321c022100bd6607fa0f7ba129a4bdacbd60e79b8102a4b2fdf7b4d5f2c6d700d96f81379b00770063f2dbcde83bcc2ccf0b728427576b33a48d61778fbd75a638b1c768544bd88d0000016c0a5586400000040300483046022100996a4928e654d496a6bc828a6c65863cdd56ab563d6c61ec34b1f82a7a1cc6eb0221009f3bb07b7d856cf18b28e5810260da47325852638d8a85ffb701ced0ecfa32c4
 . . . . [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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