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

telmex.com · 66.225.237.224:443

Verified

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

Subject
C=MX L=Ciudad de Mexico O=Teléfonos de México, S.A.B. de C.V CN=*.telmex.com
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Valid from
2026-10-02T00:00:00+00:00
Expires
2027-04-18T23:59:59+00:00
Days remaining
162
Serial (hex)
037B5AE91665CD76A7E8C96F1AE9035B
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:*.telmex.com, DNS:telmex.com

SHA-256 fingerprint

10:41:B7:07:96:3D:56:05:4C:E3:CA:13:54:2A:13:0E:0E:DE:BB:49:FF:08:B4:46:AC:06:0D:71:A1:6E:B4:ED
Certificate extensions & PEM
authorityKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
subjectKeyIdentifier
6F:9D:83:97:0D:F8:53:1F:CA:0B:EE:F8:7E:39:1B:83:EC:0B:DD:DC
subjectAltName
DNS:*.telmex.com, DNS:telmex.com
certificatePolicies
Policy: 2.23.140.1.2.2 CPS: http://www.digicert.com/CPS
keyUsage
Digital Signature, Key Encipherment
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
crlDistributionPoints
Full Name: URI:http://cdp.geotrust.com/GeoTrustTLSRSACAG1.crl
authorityInfoAccess
OCSP - URI:http://status.geotrust.com CA Issuers - URI:http://cacerts.geotrust.com/GeoTrustTLSRSACAG1.crt
basicConstraints
CA:FALSE
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 2 23:03:51.620 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:A7:2E:15:A7:9E:EB:AB:98:3C:18:2D: 25:4E:29:E6:7A:52:44:AD:B4:15:71:63:F6:92:04:FF: E1:93:D4:7C:31:02:20:3C:31:44:3C:CF:5E:9F:61:6A: A5:B8:25:DA:A4:93:3B:16:C6:9F:91:57:CF:E4:1A:18: 05:67:D0:E1:23:97:5B Signed Certificate Timestamp: Version : v1 (0x0) Log ID : D6:D5:8D:A9:D0:17:53:F3:6A:4A:A0:C7:57:49:02:AF: EB:C7:DC:2C:D3:8C:D9:F7:64:C8:0C:89:19:1E:9F:02 Timestamp : Oct 2 23:03:51.619 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:44:02:20:24:6F:5D:CD:30:DA:62:AE:BD:76:B8:F2: 3A:33:8D:46:72:EC:E9:97:FF:85:C8:92:FF:74:4B:75: E2:8F:AA:B4:02:20:01:3A:E0:E6:60:CB:05:CE:EE:EC: E4:44:F7:3F:31:FC:97:1B:3C:1E:BD:C1:94:C9:9C:4F: F8:A6:FE:75:42:2F Signed Certificate Timestamp: Version : v1 (0x0) Log ID : 1C:9F:68:2C:E9:FA:F0:45:69:50:F8:1B:96:8A:87:DD: DB:32:10:D8:4C:E6:C8:B2:E3:82:52:4A:C4:CF:59:9F Timestamp : Oct 2 23:03:51.798 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:DE:F4:00:E2:8C:17:73:15:DC:A4:27: 7B:3D:AF:37:3C:3A:20:4D:EB:0F:EA:63:50:2F:09:03: 5B:10:F4:F7:7A:02:20:50:EB:B8:6A:23:07:09:D7:11: F2:D1:0F:2A:1E:DE:05:F0:DB:AB:E1:92:2F:E0:0E:06: 8C:72:7A:99:1F:75:95
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_256_GCM_SHA384 · Checked 2026-11-07T13:28:55+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc OU=www.digicert.com CN=GeoTrust TLS RSA CA G1
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2017-11-02T12:23:37+00:00
Expires
2027-11-02T12:23:37+00:00
Days remaining
359
Serial (hex)
0D07782A133FC6F9A57296E131FFD179
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

C0:6E:30:7F:7C:FC:1D:32:FA:72:A4:C0:33:C8:7B:90:01:9A:F2:16:F0:77:5D:64:97:8A:2E:CA:6C:8A:23:0E
Certificate extensions & PEM
subjectKeyIdentifier
94:4F:D4:5D:8B:E4:A4:E2:A6:80:FE:FD:D8:F9:00:EF:A3:BE:02:57
authorityKeyIdentifier
4E:22:54:20:18:95:E6:E3:6E:E6:0F:FA:FA:B9:12:ED:06:17:8F:39
keyUsage
Digital Signature, Certificate Sign, CRL Sign
extendedKeyUsage
TLS Web Server Authentication, TLS Web Client Authentication
basicConstraints
CA:TRUE, pathlen:0
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com
crlDistributionPoints
Full Name: URI:http://crl3.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS
-----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.

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