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THE CERTIFICATE BEHIND THE CONNECTION

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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

bt.com · 45.60.72.23:443

Verified

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

Subject
jurisdictionC=GB businessCategory=Private Organization serialNumber=01800000 C=GB L=LONDON O=British Telecommunications Public Limited Company CN=www.bt.com
Issuer
C=US O=DigiCert Inc CN=GeoTrust EV RSA CA G2
Valid from
2026-02-10T00:00:00+00:00
Expires
2027-03-04T23:59:59+00:00
Days remaining
162
Serial (hex)
0941A65C20B94FFB07E4056AC854BA53
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

DNS:www.bt.com, DNS:assets.bt.com, DNS:bt.com, DNS:care.bt.com, DNS:img01.bt.co.uk, DNS:img01.products.bt.co.uk, DNS:products.bt.com, DNS:productsandservices.bt.com, DNS:www.btcom.ll-digital-prod1.bt.com, DNS:www.btcom.ll-digital-prod2.bt.com, DNS:www.info.bt.com, DNS:www.products.bt.com, DNS:www.productsandservices.bt.com, DNS:www.thephonebook.bt.com

SHA-256 fingerprint

CC:64:91:62:AF:95:49:8B:36:69:67:27:C5:C1:5E:C8:4B:90:FB:39:4F:22:05:4F:6E:92:9F:16:16:0A:7C:34
Certificate extensions & PEM
authorityKeyIdentifier
28:D2:CF:EE:09:84:75:DD:B5:B2:B5:BF:3C:D5:A0:C6:73:88:5D:1F
subjectKeyIdentifier
AA:BB:02:A3:8A:ED:0F:4C:CF:93:1A:01:AA:85:F3:16:7F:6E:3A:1F
subjectAltName
DNS:www.bt.com, DNS:assets.bt.com, DNS:bt.com, DNS:care.bt.com, DNS:img01.bt.co.uk, DNS:img01.products.bt.co.uk, DNS:products.bt.com, DNS:productsandservices.bt.com, DNS:www.btcom.ll-digital-prod1.bt.com, DNS:www.btcom.ll-digital-prod2.bt.com, DNS:www.info.bt.com, DNS:www.products.bt.com, DNS:www.productsandservices.bt.com, DNS:www.thephonebook.bt.com
certificatePolicies
Policy: 2.16.840.1.114412.2.1 Policy: 2.23.140.1.1 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://crl3.digicert.com/GeoTrustEVRSACAG2.crl Full Name: URI:http://crl4.digicert.com/GeoTrustEVRSACAG2.crl
authorityInfoAccess
OCSP - URI:http://ocsp.digicert.com CA Issuers - URI:http://cacerts.digicert.com/GeoTrustEVRSACAG2.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 : Feb 10 14:36:26.413 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:45:02:21:00:F0:1B:CB:E3:7A:AF:90:D0:28:D4:B5: A9:8D:B1:2A:AE:EB:C5:2F:06:27:E3:82:A7:B9:3D:04: D5:C9:F4:B9:F5:02:20:0A:35:EB:19:6F:3B:CB:18:6B: A8:47:20:60:84:75:70:E9:5B:5F:BE:65:48:DB:DE:DD: 26:13:6B:23:EA:A9:D7 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 : Feb 10 14:36:26.348 2026 GMT Extensions: none Signature : ecdsa-with-SHA256 30:46:02:21:00:A8:88:A0:9D:60:26:80:95:2A:2C:E6: 26:82:C1:20:1D:E2:6A:90:CF:BF:FD:B3:8B:0F:F4:F0: C4:2D:36:6C:18:02:21:00:F8:9C:84:F7:99:9B:D0:F1: 68:5C:FC:9C:AC:3D:0D:C8:5D:BD:6B:4B:C9:F9:E0:89: 56:A4:17:15:DC:6C:72:AD Signed Certificate Timestamp: Version : v1 (0x0) Log ID : A2:81:00:18:73:4E:17:6E:1D:47:E0:95:40:F3:81:BA: 54:66:97:CD:63:A8:43:50:71:6E:B8:09:4E:DA:F1:0D Timestamp : Feb 10 14:36:26.550 2026 GMT Extensions: 00:00:05:00:02:5A:E1:91 Signature : ecdsa-with-SHA256 30:46:02:21:00:C1:B7:88:8D:3B:DC:FB:61:E0:7D:F1: 21:5E:34:0D:15:B1:D0:7A:AE:81:58:89:B9:A3:EA:E0: E1:12:7E:1B:72:02:21:00:EF:51:64:FD:A1:86:A3:89: 00:BD:F4:CB:A4:7E:A2:F7:E5:FF:D6:8F:B7:69:C3:8E: 63:26:F9:BB:A8:E3:C0:98
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

Cipher: TLS_AES_128_GCM_SHA256 · Checked 2026-09-23T01:16:57+00:00

Server-presented chain · 1 additional certificate

Chain certificate 1

Subject
C=US O=DigiCert Inc CN=GeoTrust EV RSA CA G2
Issuer
C=US O=DigiCert Inc OU=www.digicert.com CN=DigiCert Global Root G2
Valid from
2020-07-02T12:42:57+00:00
Expires
2030-07-02T12:42:57+00:00
Days remaining
1378
Serial (hex)
0D601262C8A7721A6EAB0361E5619580
Signature
RSA-SHA256
Public key
RSA 2048

Subject alternative names (SAN)

No SAN extension was presented.

SHA-256 fingerprint

2D:14:0F:20:B8:A9:6E:2B:4D:2F:1C:C5:AC:A5:E5:A1:E7:DC:56:A7:49:1E:51:09:06:96:0F:38:D2:D2:1A:EF
Certificate extensions & PEM
subjectKeyIdentifier
28:D2:CF:EE:09:84:75:DD:B5:B2:B5:BF:3C:D5:A0:C6:73:88:5D:1F
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 Full Name: URI:http://crl4.digicert.com/DigiCertGlobalRootG2.crl
certificatePolicies
Policy: X509v3 Any Policy CPS: https://www.digicert.com/CPS User Notice: Explicit Text: Any use of this Certificate constitutes acceptance of the Relying Party Agreement located at https://www.digicert.com/rpa-ua
-----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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