www.zonetel.com.sg

Issued by Let's Encrypt Authority X3

About this certificate

This digital certificate with serial number 03:37:6e:08:53:e1:1c:ec:56:c0:a3:2a:43:5d:59:7a:47:19 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): 03:37:6e:08:53:e1:1c:ec:56:c0:a3:2a:43:5d:59:7a:47:19
Serial Number (int): 280198646295118849420241346470312618379033
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): 34:27:4c:1d:29:6a:45:65:02:b6:33:94:5c:a6:f2:6a:77:0c:92:dd
Fingerprint (sha256): f5:1e:08:93:99:e5:d1:a8:fd:25:e5:73:26:01:b2:35:6a:6d:a0:7a:c7:b4:56:3d:02:c0:fa:ff:78:18:d5:cc

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

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

Certificate (PEM)

-----BEGIN CERTIFICATE-----
MIIFXDCCBESgAwIBAgISAzduCFPhHOxWwKMqQ11ZekcZMA0GCSqGSIb3DQEBCwUA
MEoxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MSMwIQYDVQQD
ExpMZXQncyBFbmNyeXB0IEF1dGhvcml0eSBYMzAeFw0xOTAxMjAxNTAzNTlaFw0x
OTA0MjAxNTAzNTlaMB0xGzAZBgNVBAMTEnd3dy56b25ldGVsLmNvbS5zZzCCASIw
DQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAIxy6zBqKxQQGJd9z1lrEhGzV+a6
uPMaI7dhkUb2nyDGNMGdnQFDoHpcJeDYm7ZZWV1Ri6nnX8FI5NerzKSfCDcbrguG
rsnuBfxZJckMp6sOj9Gs0YDip7gw+Vvzvh9ABK3nNX1gR2tytCcCfyB39f2vQKTU
LKGIYuw3hgnvhte01WoNroFUl0ZvR2zGnwX+Byyl1SWZMJQodkUKEyJghog/x4mG
RCp8hcDyPfzjc34kHLIP/7njjXLmGpw4SCoYCjRJ1yFFFHQ7AltrwV2OCg3mpBVg
ShabLykpr8Pf0W7lLqD1uu61pnG4emeMJ+uxXmgbPiNHPBNTlvGVEjtqd3cCAwEA
AaOCAmcwggJjMA4GA1UdDwEB/wQEAwIFoDAdBgNVHSUEFjAUBggrBgEFBQcDAQYI
KwYBBQUHAwIwDAYDVR0TAQH/BAIwADAdBgNVHQ4EFgQU9XXRspilv8wPySyD2Uf2
y304uLAwHwYDVR0jBBgwFoAUqEpqYwR93brm0Tm3pkVl7/Oo7KEwbwYIKwYBBQUH
AQEEYzBhMC4GCCsGAQUFBzABhiJodHRwOi8vb2NzcC5pbnQteDMubGV0c2VuY3J5
cHQub3JnMC8GCCsGAQUFBzAChiNodHRwOi8vY2VydC5pbnQteDMubGV0c2VuY3J5
cHQub3JnLzAdBgNVHREEFjAUghJ3d3cuem9uZXRlbC5jb20uc2cwTAYDVR0gBEUw
QzAIBgZngQwBAgEwNwYLKwYBBAGC3xMBAQEwKDAmBggrBgEFBQcCARYaaHR0cDov
L2Nwcy5sZXRzZW5jcnlwdC5vcmcwggEEBgorBgEEAdZ5AgQCBIH1BIHyAPAAdgB0
ftqDMa0zEJEhnM4lT0Jwwr/9XkIgCMY3NXnmEHvMVgAAAWhsAR7bAAAEAwBHMEUC
IB8WFIvn9xuY0ozNDG28fubdeocqm1j3KxQgauJWPuI+AiEA2/EKgSNRSFod+9SY
PorYe2n69DUGQ31t5mg3vjCezUwAdgApPFGWVMg5ZbqqUPxYB9S3b79Yeily3KTD
DPTlRUf0eAAAAWhsASDRAAAEAwBHMEUCIQC+xT7Fargr62RUkTtXhege35RjBn3X
0fttepDxI58lHQIgaKBkeZ6Vjzp5N7i9GkANG+GofrUx/hXe7TYv7Nwpt3QwDQYJ
KoZIhvcNAQELBQADggEBAB+tAi9CX4FJxtHWOIWKR7tsr5DV8IHK2TAAVI2bmwog
1qkMIEY2yyxa2JfwhDI9F/Sl8DOnoe1mCeBCT04yGMbTv9qOHtj2IqbiUiahLuJw
5O+3tvT4oLPenOoFrYTGpzer2h9fqS/gg9hV95x6v7bHqslElGpjwuzcYF/RQ51X
p4Yxsb88XvLuKYW7Io2LqvcbJCYYifNWSC+F8MiuQW9eILDuwtJcZWN3BpvbbvE5
RKiGEB0h2QPi1ZLwI0AZ4LOVB0spy9FmYkH7OcTsCDVxJPI1bJzasb+kv5t2pNkN
ZSsqSwK/9nMrG232VG5X5TwZre1WHIZGzcauJsNEzyU=
-----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 280198646295118849420241346470312618379033
 . . . . . . . . [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 2019-01-20 15:03:59 +0000 UTC
 . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2019-04-20 15:03:59 +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 (245 bytes)
 . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes)
							00f0007600747eda8331ad331091219cce254f4270c2bffd5e422008c6373579e6107bcc56000001686c011edb000004030047304502201f16148be7f71b98d28ccd0c6dbc7ee6dd7a872a9b58f72b14206ae2563ee23e022100dbf10a812351485a1dfbd4983e8ad87b69faf43506437d6de66837be309ecd4c007600293c519654c83965baaa50fc5807d4b76fbf587a2972dca4c30cf4e54547f478000001686c0120d10000040300473045022100bec53ec56ab82beb6454913b5785e81edf9463067dd7d1fb6d7a90f1239f251d022068a064799e958f3a7937b8bd1a400d1be1a87eb531fe15deed362fecdc29b774
 . . . . [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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