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

k2telecom.com.br · 192.185.213.97:443

Verified

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

Subject
CN=www.k2telecom.com.br.welingtoncorrea.com.br
Issuer
C=US O=Let's Encrypt CN=YR1
Valid from
2026-10-26T20:11:00+00:00
Expires
2027-01-24T20:10:59+00:00
Days remaining
86
Serial (hex)
06DF4B015715A5B02FDCBDC76E48B49B873A
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:condata.welingtoncorrea.com.br, DNS:k2telecom.com.br, DNS:k2telecom.com.br.welingtoncorrea.com.br, DNS:www.condata.welingtoncorrea.com.br, DNS:www.k2telecom.com.br, DNS:www.k2telecom.com.br.welingtoncorrea.com.br

SHA-256 fingerprint

A1:9D:F7:D7:5D:AE:FB:63:9F:9F:AF:16:E3:7D:85:DE:81:50:77:82:F5:F5:35:D8:97:87:97:21:40:FF:16:06
Certificate extensions & PEM
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication
basicConstraints
CA:FALSE
subjectKeyIdentifier
2B:54:B8:BB:4C:34:6F:2B:38:AE:1A:27:10:C5:7D:50:CA:5C:79:4C
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:condata.welingtoncorrea.com.br, DNS:k2telecom.com.br, DNS:k2telecom.com.br.welingtoncorrea.com.br, DNS:www.condata.welingtoncorrea.com.br, DNS:www.k2telecom.com.br, DNS:www.k2telecom.com.br.welingtoncorrea.com.br
certificatePolicies
Policy: 2.23.140.1.2.1
crlDistributionPoints
Full Name: URI:http://yr1.c.lencr.org/59.crl
ct_precert_scts
Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 4C:63:DC:98:E5:9C:1D:AB:88:F6:1E:8A:3D:DE:AE:8F: AB:44:A3:37:7B:5F:9B:94:C3:FB:A1:9C:FC:C1:BE:26 Timestamp : Oct 26 21:09:30.192 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:20:7F:DD:58:F3:85:E2:18:CB:DC:01:F9:7F: 6A:F4:67:D1:B3:F2:C3:40:25:66:2A:03:48:78:E8:40: B8:7E:99:B0:02:21:00:A3:92:2B:E5:D2:F5:83:92:E5: 98:B4:4F:E1:DC:1A:E0:2A:3E:37:15:4A:25:E4:04:6E: 20:D6:BB:B8:D4:5B:67 Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 8E:CA:47:0B:AC:DE:6A:F3:A2:06:B0:A4:7A:84:B7:46: FE:1F:C6:BF:95:3E:25:E6:9B:4E:E4:02:48:F3:C6:E8 Timestamp : Oct 26 21:09:30.973 2026 GMT Extensions: 00:00:05:00:2F:36:3F:88 Signature : ecdsa-with-SHA256 30:45:02:21:00:9A:65:B1:05:07:03:C0:04:E0:15:32: 64:53:D8:79:D0:2D:5F:81:CA:FF:BC:2F:B3:42:41:A5: 94:E2:5B:D3:2F:02:20:4C:7F:C3:4C:6B:27:F9:3E:6A: 1B:52:88:4D:79:2C:61:68:C7:7A:CC:BB:FB:EA:45:DD: 89:01:CC:38:5B:01:97
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-10-30T02:26:33+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
673
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-----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=
-----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
2134
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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