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

afinet.com.br · 179.127.199.255:443

Verified

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

Subject
CN=afinet.com.br
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-08-21T15:45:27+00:00
Expires
2026-11-19T15:45:26+00:00
Days remaining
42
Serial (hex)
065D6A3BE329B56D4079008564EED27E025C
Signature
RSA-SHA256
Public key
RSA 4096

Subject alternative names (SAN)

DNS:afinet.boletodomes.com.br, DNS:afinet.com.br, DNS:boleto.uon.com.br, DNS:img.boletodomes.com.br, DNS:ontelecom.net.br, DNS:www.afinet.com.br, DNS:www.ontelecom.com.br, DNS:www.ontelecom.net.br

SHA-256 fingerprint

DB:2C:1B:C6:05:14:91:EA:8A:8C:34:21:1D:6F:C6:BF:75:1F:78:5D:A7:16:9B:FD:24:F1:03:75:86:60:C8:E8
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
8F:2B:A4:FF:AF:DE:62:F3:83:15:04:E2:0F:E8:EB:95:78:BF:57:38
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:afinet.boletodomes.com.br, DNS:afinet.com.br, DNS:boleto.uon.com.br, DNS:img.boletodomes.com.br, DNS:ontelecom.net.br, DNS:www.afinet.com.br, DNS:www.ontelecom.com.br, DNS:www.ontelecom.net.br
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/93.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 94:4E:43:87:FA:EC:C1:EF:81:F3:19:24:26:A8:18:65: 01:C7:D3:5F:38:02:01:3F:72:67:7D:55:37:2E:19:D8 Timestamp : Aug 21 16:43:57.241 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:5F:A1:1D:72:43:02:A4:46:BD:B8:BD:7C: 47:84:89:24:10:B8:AA:EE:F0:51:11:BA:98:47:7E:27: A6:EE:41:80:02:21:00:86:50:1C:D4:27:F1:93:A2:A4: 82:E6:4F:E1:F9:2E:A9:38:3F:A8:62:48:69:83:46:4F: B1:BA:93:55:4D:25:DE Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A8:26:CB:E3:0A:C6:35:12:46:53:3F:E0:65:F1:4F:19: D9:6E:19:08:13:C4:1D:D9:6D:79:00:B3:12:3C:55:27 Timestamp : Aug 21 16:43:57.692 2026 GMT Extensions: 00:00:05:00:20:A7:DA:02 Signature : ecdsa-with-SHA256 30:46:02:21:00:82:91:39:7D:FE:F6:AE:3A:59:DB:A0: 83:FB:41:73:F3:9B:43:D3:82:E7:CA:B0:6B:88:9F:00: 32:1F:DB:78:58:02:21:00:CD:86:E0:7B:5C:A7:A2:D5: D4:76:73:4C:39:5C:9E:30:C6:CA:C2:7D:64:7E:38:AC: ED:A8:BD:B5:9A:35:85:31
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_CHACHA20_POLY1305_SHA256 · Checked 2026-10-08T13:57:23+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
695
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
2156
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

Registration / WHOIS →DNS records →