DNS
THE CERTIFICATE BEHIND THE CONNECTION

TLS certificate checker.

Inspect SSL/TLS certificates for any public domain or subdomain.

Checks HTTPS on port 443, including subject alternative names, validity dates and the presented chain.

SSL certificate

TLSv1.3

posta.powernet.com.tr · 157.90.91.93:443

Verified

Certificate chain, hostname and dates verified using this server’s CA store.

Subject
CN=posta.powernet.com.tr
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-09-08T09:50:36+00:00
Expires
2026-12-07T09:50:35+00:00
Days remaining
51
Serial (hex)
05EAF80DE4ADFD5462BDB80B3E5455446687
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:autoconfig.powernet.com.tr, DNS:autoconfig.poyraznetwork.com, DNS:autoconfig.poyrazwifi.com.tr, DNS:autodiscover.powernet.com.tr, DNS:autodiscover.poyraznetwork.com, DNS:autodiscover.poyrazwifi.com.tr, DNS:posta.powernet.com.tr

SHA-256 fingerprint

28:0C:FD:7D:A0:55:5A:DB:0E:EC:53:BB:A7:3F:86:FA:2B:F1:B6:9C:D4:36:D0:1D:86:39:1C:33:83:5A:B1:17
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
A8:1E:AC:DF:C1:EB:06:50:86:C4:65:CE:69:ED:F2:37:B7:39:23:17
authorityKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityInfoAccess
CA Issuers - URI:http://yr1.i.lencr.org/
subjectAltName
DNS:autoconfig.powernet.com.tr, DNS:autoconfig.poyraznetwork.com, DNS:autoconfig.poyrazwifi.com.tr, DNS:autodiscover.powernet.com.tr, DNS:autodiscover.poyraznetwork.com, DNS:autodiscover.poyrazwifi.com.tr, DNS:posta.powernet.com.tr
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/8.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1A:8B:9D:6B:0F:FE:BF:81:B4:79:39:C6:D2:31:0A:86: D6:D1:02:D4:F0:46:E2:18:2C:9D:E3:5F:5E:26:25:EF Timestamp : Sep 8 10:49:07.363 2026 GMT Extensions: 00:00:05:00:3D:F9:5C:2D Signature : ecdsa-with-SHA256 30:45:02:20:4B:70:7F:F0:AB:E8:73:6C:24:8B:AF:87: D3:34:00:66:77:AD:D5:22:5C:4C:E6:69:B9:A5:BC:F4: 8A:AD:3F:06:02:21:00:E0:FF:08:B6:ED:88:08:3F:6C: 04:F7:C0:A9:7D:69:32:85:24:2E:6F:82:D7:E4:14:E4: 11:6F:45:92:42:51:B5 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : C2:31:7E:57:45:19:A3:45:EE:7F:38:DE:B2:90:41:EB: C7:C2:21:5A:22:BF:7F:D5:B5:AD:76:9A:D9:0E:52:CD Timestamp : Sep 8 10:49:10.616 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:5F:A5:96:2B:51:6B:5D:4C:8D:4B:6B:E8: 24:71:B1:A2:16:B6:B0:E9:75:E8:BB:84:F9:99:E2:4B: 20:99:3A:6B:02:20:73:F7:35:93:12:E9:BF:18:EA:97: F7:B2:AA:07:85:76:5A:AA:31:4B:EC:82:14:2E:10:41: 3D:DA:1A:EF:3C:A4
-----BEGIN CERTIFICATE-----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=
-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-17T02:08:41+00:00

Server-presented chain · 2 additional certificates

Chain certificate 1

Subject
C=US O=Let's Encrypt CN=YR1
Issuer
C=US O=ISRG CN=Root YR
Valid from
2025-09-03T00:00:00+00:00
Expires
2028-09-02T23:59:59+00:00
Days remaining
686
Serial (hex)
A20253F15F2691C05DC1CE13B9BCCA4E
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

13:94:96:34:D9:9C:D6:FD:6A:A8:0B:C0:34:FE:FA:CC:EB:19:69:FE:EF:98:65:86:71:3E:CD:BB:05:75:8D:3F
Certificate extensions & PEM
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE, pathlen:0
subjectKeyIdentifier
1F:2F:35:BE:46:14:82:CD:40:B1:AE:79:2C:55:78:FA:F7:D4:68:FB
authorityKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityInfoAccess
CA Issuers - URI:http://yr.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr.c.lencr.org/ 
-----BEGIN CERTIFICATE-----
MIIE2zCCAsOgAwIBAgIRAKICU/FfJpHAXcHOE7m8yk4wDQYJKoZIhvcNAQELBQAw
LjELMAkGA1UEBhMCVVMxDTALBgNVBAoTBElTUkcxEDAOBgNVBAMTB1Jvb3QgWVIw
HhcNMjUwOTAzMDAwMDAwWhcNMjgwOTAyMjM1OTU5WjAzMQswCQYDVQQGEwJVUzEW
MBQGA1UEChMNTGV0J3MgRW5jcnlwdDEMMAoGA1UEAxMDWVIxMIIBIjANBgkqhkiG
9w0BAQEFAAOCAQ8AMIIBCgKCAQEAoVi8X2xCYgMXvJxNPKp/oF13UMgmPABB07VC
LNDtoXmt9luEZNJSBV10VyT1Pz6LD8Zq1d2gc43WNl1AdRrj4sEnazbOiz0nPpmG
Bp2hui49oZtDIY6wdKeZAi5BbNU20CH6RSBBMLSQ9cXrH8dxdv4PAJ45ssGML68U
SE3BsjC2a6cAN9L5CgXVIQi5tfNiTPoFZZ3S0OlXqLmmtdV95udWAb5b6e/F49Di
CsH0Y00Ag72BVIb1hzynmKe+X0mERBTtsb3BwmpV9ipeBjMLoR/D9cHxHQCWoi5l
TmXwY015J5rGelz1nZjJuxc2kioaX29XJBnhMkP531rSdG5uMwIDAQABo4HuMIHr
MA4GA1UdDwEB/wQEAwIBhjATBgNVHSUEDDAKBggrBgEFBQcDATASBgNVHRMBAf8E
CDAGAQH/AgEAMB0GA1UdDgQWBBQfLzW+RhSCzUCxrnksVXj699Ro+zAfBgNVHSME
GDAWgBTe51tg0CJtQCh9Pw0B/qS1UrRRlDAyBggrBgEFBQcBAQQmMCQwIgYIKwYB
BQUHMAKGFmh0dHA6Ly95ci5pLmxlbmNyLm9yZy8wEwYDVR0gBAwwCjAIBgZngQwB
AgEwJwYDVR0fBCAwHjAcoBqgGIYWaHR0cDovL3lyLmMubGVuY3Iub3JnLzANBgkq
hkiG9w0BAQsFAAOCAgEA0+zvMq3kHig1ddTmmm+RibTr9/RpX7k4buanMMRqbV/y
IvP82zAHN3mvaw+cASuVsdpd0ikjhr4hnhJQLQOzOp2ccKrsdGOAgo0vddeISFAq
EWEV4lmUM3vFF796up+bSgmJ1u6RupDCMxDgF8M3eLvGuj6L0lu3zkQ0KuQLnKxL
tB0oQqn1Idg5CuuGpMvQzk29Pa3D/qHurc0EIM9SxukQuJqq63lxsYyRQFU8yMBO
hq1w5LbfaWNRrz1uklOfI/pYkAb2E2MTZrAMQkBIE2S8Jt1F8gRc96o/xOsrgvSk
a84AisX6xq1lz1Z7jGvrnXc4TMcjxZTjiTaihcYI1JIXZiLtEMSCa5l3cu8YWd6z
dLRQlqRdclVjuQfNHawRJ6GWlkK0QJosivTKwdBw3KxEtzGo8yMHERbsy57gP1UX
HOMcmZYQC0gtyR3SxfenIM/MxC3Ia2Ypab/kQ/CTnlIn2KQ5JUC6NYrGCbhFN9bp
5lKJStEwCUnLpntcrXk5XVDCNv/5RyWpRThkGOV7GetKkQ0qAY8hCzWK6oqnAhDZ
cjlYVdWfqOw3DIOX6EDNBgAqHarRVxyF9QZdOaXSyPJ0ueD2BYJEBgaCGQ8rAaU/
Qc123V5LTXDZW4CcsPBDyhy4v+c8hClAyw/IkJlfBqxB9D+/wvIMHgECZ4ptP6o=
-----END CERTIFICATE-----

Chain certificate 2

Subject
C=US O=ISRG CN=Root YR
Issuer
C=US O=Internet Security Research Group CN=ISRG Root X1
Valid from
2026-05-13T00:00:00+00:00
Expires
2032-09-02T23:59:59+00:00
Days remaining
2147
Serial (hex)
F24B6D17F9D9AD7CB1C9FEA78782699F
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

07:26:39:D0:B1:40:D5:BF:FA:E1:6A:D9:C3:F6:CC:60:86:04:06:21:F5:1E:E6:1A:6D:46:A8:91:5C:07:CF:76
Certificate extensions & PEM
keyUsage
Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:TRUE
subjectKeyIdentifier
DE:E7:5B:60:D0:22:6D:40:28:7D:3F:0D:01:FE:A4:B5:52:B4:51:94
authorityKeyIdentifier
79:B4:59:E6:7B:B6:E5:E4:01:73:80:08:88:C8:1A:58:F6:E9:9B:6E
authorityInfoAccess
CA Issuers - URI:http://x1.i.lencr.org/
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://x1.c.lencr.org/ 
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

One endpoint on port 443. Server-presented chain; no revocation, OCSP, CT or full TLS security scan.

View certificate JSON

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