wildcard.gw18-226-ext.dpo.a-star.edu.sg
Issued by R3
About this certificate
This digital certificate with serial number 03:e7:0f:49:e2:f3:da:0f:e2:93:b9:84:ef:5b:42:6e:30:d3 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:
- DV certificate contains a subject common name, this is not recommended. If certificate policy 2.23.140.1.2.1 (CA/B BR domain validated) is included, only country and/or common name is allowed in SubjectDN. (BRs: 7.1.2.7.2)
- 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)
Certificate Subject
CN=wildcard.gw18-226-ext.dpo.a-star.edu.sg
Let's Encrypt
Organization:
Let's Encrypt
Country:
US
This certificate has expire since
Certificate Details
Serial Number (hex): 03:e7:0f:49:e2:f3:da:0f:e2:93:b9:84:ef:5b:42:6e:30:d3Serial Number (int): 339962406614769472632673634528346575352019
Serial Number lenght: 138 bits, 18 octets
SubjectKeyId: a4:0c:7c:0d:c0:5e:76:a8:8b:2b:97:df:ec:f5:c7:3a:8b:62:4c:cd
AuthorityKeyId: 14:2e:b3:17:b7:58:56:cb:ae:50:09:40:e6:1f:af:9d:8b:14:c2:c6
Fingerprint (sha1): d0:5e:30:11:71:fd:54:c2:56:fe:44:32:54:83:ad:dc:c6:79:ef:4c
Fingerprint (sha256): 05:a4:15:96:64:61:45:a5:c5:61:4a:e5:67:bc:da:ef:25:d2:12:3e:15:ed:a2:12:1c:ba:df:f1:20:23:63:be
Issuing Certificate URL: http://r3.i.lencr.org/
Revocation information
OCSP Server: http://r3.o.lencr.orgCheck the revocation status for certificate wildcard.gw18-226-ext.dpo.a-star.edu.sg
1
DNS Names
0
Email Addresses
0
IP Addresses
Advanced Certificate Properties
Tehnical certificate details for wildcard.gw18-226-ext.dpo.a-star.edu.sg
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
9 extensions
No
unhandled critical extensions
CA Certificate
This is not a CA certificate
Subject Alternative Names
wildcard.gw18-226-ext.dpo.a-star.edu.sg
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Certificate
The complete raw certificate details for wildcard.gw18-226-ext.dpo.a-star.edu.sg in PEM and ASN.1 format.
Certificate (PEM)
-----BEGIN CERTIFICATE----- MIIGGzCCBQOgAwIBAgISA+cPSeLz2g/ik7mE71tCbjDTMA0GCSqGSIb3DQEBCwUA MDIxCzAJBgNVBAYTAlVTMRYwFAYDVQQKEw1MZXQncyBFbmNyeXB0MQswCQYDVQQD EwJSMzAeFw0yMzExMTcyMzExMjdaFw0yNDAyMTUyMzExMjZaMDIxMDAuBgNVBAMT J3dpbGRjYXJkLmd3MTgtMjI2LWV4dC5kcG8uYS1zdGFyLmVkdS5zZzCCAiIwDQYJ KoZIhvcNAQEBBQADggIPADCCAgoCggIBAL07epKO91KFxo0RMG3zyYxhkKnIieDw eBa4tJRT7lQFOUorGKDhu/GZEeoasfjJGx2EMS0U2/nowYgx0AVzOOes/6CNQXo8 bLADyrIMQn9CyFS+I/bMUJ06fQ9zryf50nmN/vg8kdsSQgTo8WBhkeZ87Xf89qkL HHXH1XGlD/3nS3XWcsbCoeWAVEI2BLlpM59wwEwcrblvMGOQvMJCnIRLXvwaqQJ+ LAG4H/uLaid5nKrrMOWwQGdwjzycC3mWOTy4iosFTbfMxja0IOWORbFcho+3j/4s wTNx5Vt9gOZIPMGuzxkOPz3s9+yFOX8jV+0VHQBRqzRKPLF+VTtOG9RlncImqQgg rafkr9SUwac7NVoCkwHpZQXiITiRFvZfJSiY2mDkh+wWMaad7rSPw56MEqM/cHTr 6E/aDMibW4vlHhvQrZyxjDj+kwUkZZsu9tJ7hz3/TSYuLh9MurSx8l9p1drDdq77 11nsh4QNzzsT/yPTRYEsEDbwaoiEK0xqK2ZrO+sqWacDcAgdWzCOyyXADqvmi66O fJvEIRF7tvUlit2RcMl2VJUl6KKN1tjbsFEzBsJlW87ZfXgIC/YMnh2pQpJsKUVI tSgwuecDKPUuPtNn7F8kQae1U18GsVy6rWA7kpDP1IQYWscse/iTXgIVCSXPKHdC USX7kgTXLJavAgMBAAGjggIpMIICJTAOBgNVHQ8BAf8EBAMCBaAwHQYDVR0lBBYw FAYIKwYBBQUHAwEGCCsGAQUFBwMCMAwGA1UdEwEB/wQCMAAwHQYDVR0OBBYEFKQM fA3AXnaoiyuX3+z1xzqLYkzNMB8GA1UdIwQYMBaAFBQusxe3WFbLrlAJQOYfr52L FMLGMFUGCCsGAQUFBwEBBEkwRzAhBggrBgEFBQcwAYYVaHR0cDovL3IzLm8ubGVu Y3Iub3JnMCIGCCsGAQUFBzAChhZodHRwOi8vcjMuaS5sZW5jci5vcmcvMDIGA1Ud EQQrMCmCJ3dpbGRjYXJkLmd3MTgtMjI2LWV4dC5kcG8uYS1zdGFyLmVkdS5zZzAT BgNVHSAEDDAKMAgGBmeBDAECATCCAQQGCisGAQQB1nkCBAIEgfUEgfIA8AB2AEiw 42vapkc0D+VqAvqdMOscUgHLVt0sgdm7v6s52IRzAAABi9/EoMYAAAQDAEcwRQIh AIG5/alJwcraGBjRl/PnVUE4+Lc/ueDA1a0bMkYavG5qAiAvhUsUabk78RLYWcfm X/mY0sdwIazrBU4EMuYxO03hzgB2AO7N0GTV2xrOxVy3nbTNE6Iyh0Z8vOzew1FI WUZxH7WbAAABi9/EoNoAAAQDAEcwRQIhAKL8AkpxvarG2wOWM9xZbHjvlevkqvoJ o3wSdropHWMBAiAJQ64LOlBbWi6n6YXnObjN8W+fi2IZgyb67MprxFH5LDANBgkq hkiG9w0BAQsFAAOCAQEAbapKkl8plmgQzQE3I2Iq52himv58SxrXJjNfwrl9HHwV rd+hCAH6qtNpUWyUn4Wo3RLW7aK96qLcsd4dYdT+x/Hm1OvD5SbTozDw7ZJ57Yjh YpauOnHXZ3vyuRBaNMoqHCv6QeeWCEjJ+znLSj1+k17XerzXnkE2MylkP0X3TAkF +HDiC8vRj0b2WxRJW3EmhdrFOTOlwQyJVRNNJtA5/zGHNee8oPmrWVvndVkdJDX2 y1B1TGK9MpK2niwKVTveKURFvhDPEdN4NqRIsBndq3LsXfnlmCx5YLu6xcPXtekB i0bLFZxkQmxOvq+PnofXNXB1D0kUeey6c8x86xdBVA== -----END CERTIFICATE-----
Public Key (PEM)
-----BEGIN PUBLIC KEY----- MIICIjANBgkqhkiG9w0BAQEFAAOCAg8AMIICCgKCAgEAvTt6ko73UoXGjREwbfPJ jGGQqciJ4PB4Fri0lFPuVAU5SisYoOG78ZkR6hqx+MkbHYQxLRTb+ejBiDHQBXM4 56z/oI1BejxssAPKsgxCf0LIVL4j9sxQnTp9D3OvJ/nSeY3++DyR2xJCBOjxYGGR 5nztd/z2qQscdcfVcaUP/edLddZyxsKh5YBUQjYEuWkzn3DATBytuW8wY5C8wkKc hEte/BqpAn4sAbgf+4tqJ3mcqusw5bBAZ3CPPJwLeZY5PLiKiwVNt8zGNrQg5Y5F sVyGj7eP/izBM3HlW32A5kg8wa7PGQ4/Pez37IU5fyNX7RUdAFGrNEo8sX5VO04b 1GWdwiapCCCtp+Sv1JTBpzs1WgKTAellBeIhOJEW9l8lKJjaYOSH7BYxpp3utI/D nowSoz9wdOvoT9oMyJtbi+UeG9CtnLGMOP6TBSRlmy720nuHPf9NJi4uH0y6tLHy X2nV2sN2rvvXWeyHhA3POxP/I9NFgSwQNvBqiIQrTGorZms76ypZpwNwCB1bMI7L JcAOq+aLro58m8QhEXu29SWK3ZFwyXZUlSXooo3W2NuwUTMGwmVbztl9eAgL9gye HalCkmwpRUi1KDC55wMo9S4+02fsXyRBp7VTXwaxXLqtYDuSkM/UhBhaxyx7+JNe AhUJJc8od0JRJfuSBNcslq8CAwEAAQ== -----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 339962406614769472632673634528346575352019 . . . . . . . . [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 2023-11-17 23:11:27 +0000 UTC . . . . . . . . . . . . [c:0|t:23|false] UTCTime 2024-02-15 23:11:26 +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 'wildcard.gw18-226-ext.dpo.a-star.edu.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 (4208 bits) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:2|false] INTEGER 772000589514852203647898895778928122479814264239898164906879930143952975309232394490031604406395627823661063286163136713485096416025069723101916443236065437728173143134941460331040376134021718083478168346399474072684630847622461261554576214931198372133368448014150916970654797508017757570800664561584374670870836945819899173209076070059400415293258179046568299444324888953294671576420943227710742272025490219410354023623243205309418800311438085031664626008285070341995840183232226617183262210086152972811265930798704041435565433129314337649845034385747159850681878031877703674948192835975835900081125777285026320150136247119126505410135400811397204548879562686363288493001202855257607573387377270168680278619876121223103825293595996740732080183768257778272749466235796970069121709840401772193838726324357350618230301101368929828556775019509203581989208981857116020726701749393703180147065505791919133340037583171885477498902588267388009994510707029377231834783856329889716736609525208056536111655946893140409884623529606047262668646235876964217856815830516485691015574116501394508080547560244669038663762874274578624587893256968649861346578999849331374377209012934299256679700338917086212405748538584798791222282992658003828883101359 . . . . . . . . . . . . . . . . . . . . [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) a40c7c0dc05e76a88b2b97dfecf5c73a8b624ccd . . . . . . . . . . . . . . . . [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 (43 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . . . . . . . . . [c:2|t:2|false] IA5String 'wildcard.gw18-226-ext.dpo.a-star.edu.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 (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 (Domain Validation Certificates Policy) . . . . . . . . . . . . . . . . [c:0|t:16|true] SEQUENCE, SEQUENCE OF . . . . . . . . . . . . . . . . . . . . [c:0|t:6|false] OBJECT IDENTIFIER 1.3.6.1.4.1.11129.2.4.2 . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (245 bytes) . . . . . . . . . . . . . . . . . . . . . . . . [c:0|t:4|false] OCTET STRING (242 bytes) 00f000760048b0e36bdaa647340fe56a02fa9d30eb1c5201cb56dd2c81d9bbbfab39d884730000018bdfc4a0c6000004030047304502210081b9fda949c1cada1818d197f3e7554138f8b73fb9e0c0d5ad1b32461abc6e6a02202f854b1469b93bf112d859c7e65ff998d2c77021aceb054e0432e6313b4de1ce007600eecdd064d5db1acec55cb79db4cd13a23287467cbcecdec351485946711fb59b0000018bdfc4a0da0000040300473045022100a2fc024a71bdaac6db039633dc596c78ef95ebe4aafa09a37c1276ba291d630102200943ae0b3a505b5a2ea7e985e739b8cdf16f9f8b62198326faecca6bc451f92c . . . . [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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