IP Lookup ASN Lookup Learning Hub
SSL Check WHOIS
Dashboard / Security Report

www.cloudflare.com

Overall grade based on: IPv4: 2 of 2 complete · IPv6: 0 of 2 complete, 2 pending — IPv6 results are added below when their scan finishes; they do not count until then.
IPv6 scan in progress
2606:4700::6810:7b60 IPv6 · Pending: IPv6 scan not started yet (it runs when the report is opened, or via POST /api/ssl-check/{domain}/ipv6).
2606:4700::6810:7c60 IPv6 · Pending: IPv6 scan not started yet (it runs when the report is opened, or via POST /api/ssl-check/{domain}/ipv6).

The IPv4 report below is complete. IPv6 results will be added to this page automatically when the scan finishes.

All 2 endpoints share identical configuration Select an IP for owner, ASN & location
A+ 104.16.123.96 IPv4 WHOIS › A+ 104.16.124.96 IPv4 WHOIS ›
A+

Exceptional Security

Overall Rating
Assessed 2026-10-17 19:12 UTC

Grade Breakdown

Protocol Support 95%
Key Exchange 90%
Cipher Strength 100%
Certificate 100%

Protocol Configuration

Supported Protocols

TLS 1.3
TLS 1.2
TLS 1.1
TLS 1.0
SSL 3
SSL 2

Negotiated Cipher

TLS_AES_256_GCM_SHA384

Protocol Details

Connection
ALPN h2 http/1.1
SNI Required No
Supported Named Groups X25519MLKEM768 X25519Kyber768Draft00 x25519 secp256r1 secp384r1 secp521r1 (server preference order)
Post-Quantum Key Exchange Yes X25519MLKEM768, X25519Kyber768Draft00
HTTP/3 (QUIC) Yes (advertised)
Encrypted Client Hello No
Security Features
Forward SecrecyYes (ECDHE / DHE)
Downgrade Prevention Yes (legacy TLS disabled)
Secure Renegotiation Supported (RFC 5746)
Extended Master Secret Yes (RFC 7627)
OCSP Stapling No (certificate has no OCSP responder)
HSTS Yes 1 year · includeSubDomains
HSTS Preloading Preloaded
Security Checks
BEAST attack Mitigated
POODLE (SSLv3) No (SSL 3 not supported)
POODLE (TLS) No
RC4 No
SSL/TLS CompressionNo (not supported by .NET TLS stack)
HeartbleedNot tested

Cipher Suite Analysis

Cipher SuiteHexKey ExchangeFSBitsStrength
# TLS 1.3
TLS_AES_128_GCM_SHA2560x1301ECDHEFS128Secure
TLS_AES_256_GCM_SHA3840x1302ECDHEFS256Secure
TLS_CHACHA20_POLY1305_SHA2560x1303ECDHEFS256Secure
# TLS 1.2
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA2560xC02BECDHEFS128Secure
TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA2560xCCA9ECDHEFS256Secure
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA0xC009ECDHEFS128Weak
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA3840xC02CECDHEFS256Secure
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA0xC00AECDHEFS256Weak
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA2560xC023ECDHEFS128Weak
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA3840xC024ECDHEFS256Weak
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA2560xC02FECDHEFS128Secure
TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA2560xCCA8ECDHEFS256Secure
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA0xC013ECDHEFS128Weak
TLS_RSA_WITH_AES_128_GCM_SHA2560x009CRSANo FS128Weak
TLS_RSA_WITH_AES_128_CBC_SHA0x002FRSANo FS128Weak
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA3840xC030ECDHEFS256Secure
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA0xC014ECDHEFS256Weak
TLS_RSA_WITH_AES_256_GCM_SHA3840x009DRSANo FS256Weak
TLS_RSA_WITH_AES_256_CBC_SHA0x0035RSANo FS256Weak
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA2560xC027ECDHEFS128Weak
TLS_RSA_WITH_AES_128_CBC_SHA2560x003CRSANo FS128Weak
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA3840xC028ECDHEFS256Weak
TLS_RSA_WITH_AES_256_CBC_SHA2560x003DRSANo FS256Weak

Handshake Simulation

ClientProtocolCipher SuiteResult
Chrome 120 / Win 11TLS 1.3TLS_AES_256_GCM_SHA384Success
Chrome 80 / Win 10TLS 1.3TLS_AES_256_GCM_SHA384Success
Firefox 115 / Win 10TLS 1.3TLS_AES_256_GCM_SHA384Success
iOS 17 / SafariTLS 1.3TLS_CHACHA20_POLY1305_SHA256Success
macOS 14 / SafariTLS 1.3TLS_AES_256_GCM_SHA384Success
Android 14TLS 1.3TLS_AES_128_GCM_SHA256Success
Chrome 69 / Win 7TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Chrome 49 / XP SP3TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
IE 11 / Win 10TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
IE 11 / Win 7TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Android 9.0TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Android 7.0TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Android 5.0TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Android 4.4.2TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Java 11TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Java 8u121TLS 1.2TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256Success
Android 4.0.4--No
Android 4.1.1--No
Baidu Jan 2015--No
Java 6--No

* Simulated based on server's supported protocols and cipher configuration.

Certificate Identity

Common Namewww.cloudflare.com
Alt Names www.cloudflare.com blog.api.www.cloudflare.com
IssuerCN=WE1, O=Google Trust Services, C=US
Validity 2026-10-12 to 2027-01-10 (65 days remaining)
KeyECDSA 256 bits (sha256ECDSA)
Serial Number00E0D6E77A0DFE73170ED42975E4C2361A
SHA256 Fingerprint 7c794df05f61fe7b7ea841ef0803b847eb865ce24e3654a8da6c3cdc9e738d3d
Pin SHA256Kji2myVmlsCaEfvxR0/jkCNjYzqwDdnCl7LeZJty1y4=

Certificate Properties

Type DV
Cert Transparency Yes (SCT)
OCSP Must Staple No
Revocation Good (not revoked) CRL: http://c.pki.goog/we1/hs_dk8J4OxA.crl No OCSP responder — revocation is published via CRL only (as CA/B Forum rules now allow).
DNS CAA Yes (configured) 0 iodef "mailto:[email protected]" 0 issue "comodoca.com" 0 issue "digicert.com; cansignhttpexchanges=yes" 0 issue "letsencrypt.org" 0 issue "pki.goog; cansignhttpexchanges=yes" 0 issue "ssl.com" 0 issuewild "comodoca.com" 0 issuewild "digicert.com; cansignhttpexchanges=yes" 0 issuewild "letsencrypt.org" 0 issuewild "pki.goog; cansignhttpexchanges=yes" 0 issuewild "ssl.com"
Trusted By Yes Mozilla · Apple · Android · Java · Windows
Name Match Yes
Validity Period 90 days (maximum 200 days for certificates issued then)
Chain IssuesNone

Trust Chain Architecture

End-Entity Certificate
CN=www.cloudflare.com (Issuer: CN=WE1, O=Google Trust Services, C=US)
Intermediate CA
CN=WE1, O=Google Trust Services, C=US (Issuer: CN=GTS Root R4, O=Google Trust Services LLC, C=US)
Root Certificate
CN=GTS Root R4, O=Google Trust Services LLC, C=US (Issuer: CN=GTS Root R4, O=Google Trust Services LLC, C=US)

TLS History & Relations

Everything our scans have seen for www.cloudflare.com, first seen 2026-10-17; current certificate since 2026-10-17.

Certificates served

Certificate (SHA-256)IssuerValidServed
7c794df05f61fe7b… current WE12026-10-12 → 2027-01-102026-10-17

Addresses

AddressCertificateSeen
104.16.123.96 7c794df05f61fe7b… 2026-10-17
104.16.124.96 7c794df05f61fe7b… 2026-10-17

TLS history (a row per change; repeated checks only extend it)

Since → last checked (UTC)GradeTLSCertificatesAddresses
2026-10-17 19:12A+TLS 1.3 7c794df05f61fe7b… 104.16.123.96, 104.16.124.96