www.squarespace.com
IPv6: no public AAAA record — the domain is reachable over IPv4 only.
All 4 endpoints share identical configuration Select an IP for owner, ASN & location
A+ 198.185.159.180 IPv4 WHOIS › A+ 198.185.159.181 IPv4 WHOIS › A+ 198.49.23.180 IPv4 WHOIS › A+ 198.49.23.181 IPv4 WHOIS › 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_128_GCM_SHA256
Protocol Details
| Connection | |
| ALPN | h2 |
| SNI Required | No |
| Supported Named Groups | X25519MLKEM768 SecP256r1MLKEM768 SecP384r1MLKEM1024 x25519 secp256r1 secp384r1 secp521r1 (server preference order) |
| Post-Quantum Key Exchange | Yes X25519MLKEM768, SecP256r1MLKEM768, SecP384r1MLKEM1024 |
| HTTP/3 (QUIC) | Unknown |
| Encrypted Client Hello | Unknown |
| Security Features | |
| Forward Secrecy | Yes (ECDHE / DHE) |
| Downgrade Prevention | Yes (legacy TLS disabled) |
| Secure Renegotiation | Supported (RFC 5746) |
| Extended Master Secret | Yes (RFC 7627) |
| OCSP Stapling | No |
| HSTS | No |
| HSTS Preloading | N/A (HSTS not enabled) |
| Security Checks | |
| BEAST attack | Mitigated |
| POODLE (SSLv3) | No (SSL 3 not supported) |
| POODLE (TLS) | No |
| RC4 | No |
| SSL/TLS Compression | No (not supported by .NET TLS stack) |
| Heartbleed | Not tested |
Cipher Suite Analysis
| Cipher Suite | Hex | Key Exchange | FS | Bits | Strength |
|---|---|---|---|---|---|
| # TLS 1.3 | |||||
| TLS_AES_128_GCM_SHA256 | 0x1301 | ECDHE | FS | 128 | Secure |
| TLS_AES_256_GCM_SHA384 | 0x1302 | ECDHE | FS | 256 | Secure |
| TLS_CHACHA20_POLY1305_SHA256 | 0x1303 | ECDHE | FS | 256 | Secure |
| # TLS 1.2 | |||||
| TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | 0xC02F | ECDHE | FS | 128 | Secure |
| TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 | 0xC030 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 | 0xCCA8 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA | 0xC013 | ECDHE | FS | 128 | Weak |
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA | 0xC014 | ECDHE | FS | 256 | Weak |
Handshake Simulation
| Client | Protocol | Cipher Suite | Result |
|---|---|---|---|
| Chrome 120 / Win 11 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Chrome 80 / Win 10 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Firefox 115 / Win 10 | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| iOS 17 / Safari | TLS 1.3 | TLS_CHACHA20_POLY1305_SHA256 | Success |
| macOS 14 / Safari | TLS 1.3 | TLS_AES_256_GCM_SHA384 | Success |
| Android 14 | TLS 1.3 | TLS_AES_128_GCM_SHA256 | Success |
| Chrome 69 / Win 7 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Chrome 49 / XP SP3 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| IE 11 / Win 10 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| IE 11 / Win 7 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 9.0 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 7.0 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 5.0 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 4.4.2 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Java 11 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Java 8u121 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| 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 Name | www.squarespace.com |
| Alt Names | *.squarespace.com squarespace.com *.campaign-preferences.com campaign-preferences.com *.sqsp.net sqsp.net *.sqspcdn.com static1.1.sqspcdn.com static2.1.sqspcdn.com static1.2.sqspcdn.com cdn1.1.sqspcdn.com sqspcdn.com *.engage.squarespace-mail.com engage.squarespace-mail.com |
| Issuer | CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1, O=DigiCert Inc, C=US |
| Validity | 2026-02-10 to 2027-03-03 (112 days remaining) |
| Key | RSA 2048 bits (sha256RSA) |
| Serial Number | 0EF444771207F0A7402C48A640F83128 |
| SHA256 Fingerprint | 0ec2d48aa81093729313ed7faeedd54f80461c076c8611fc8d211c867255e7ce |
| Pin SHA256 | 4lmc6ec5akxGDGzWQUz4/V4QzWNERSWMK28BBrlo1Sc= |
Certificate Properties
| Type | OV |
| Cert Transparency | Yes (SCT) |
| OCSP Must Staple | No |
| Revocation | Unknown (CRL could not be downloaded) OCSP: http://ocsp.digicert.com CRL: http://crl3.digicert.com/DigiCertGlobalG2TLSRSASHA2562020CA1-1.crl |
| DNS CAA | No (missing) |
| Trusted By | Yes Mozilla · Apple · Android · Java · Windows |
| Name Match | Yes |
| Validity Period | 387 days (maximum 398 days for certificates issued then) |
| Chain Issues | None |
Trust Chain Architecture
End-Entity Certificate
CN=*.squarespace.com, O="Squarespace, Inc.", L=New York, S=New York, C=US (Issuer: CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1, O=DigiCert Inc, C=US)
Intermediate CA
CN=DigiCert Global G2 TLS RSA SHA256 2020 CA1, O=DigiCert Inc, C=US (Issuer: CN=DigiCert Global Root G2, OU=www.digicert.com, O=DigiCert Inc, C=US)
Root Certificate
CN=DigiCert Global Root G2, OU=www.digicert.com, O=DigiCert Inc, C=US (Issuer: CN=DigiCert Global Root G2, OU=www.digicert.com, O=DigiCert Inc, C=US)
TLS History & Relations
Everything our scans have seen for www.squarespace.com, first seen 2026-10-15; current certificate since 2026-10-15.
Certificates served
| Certificate (SHA-256) | Issuer | Valid | Served |
|---|---|---|---|
| 0ec2d48aa8109372… current | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 2026-02-10 → 2027-03-03 | 2026-10-15 |
Addresses
| Address | Certificate | Seen |
|---|---|---|
| 198.49.23.180 | 0ec2d48aa8109372… | 2026-10-15 |
| 198.49.23.181 | 0ec2d48aa8109372… | 2026-10-15 |
| 198.185.159.180 | 0ec2d48aa8109372… | 2026-10-15 |
| 198.185.159.181 | 0ec2d48aa8109372… | 2026-10-15 |
TLS history (a row per change; repeated checks only extend it)
| Since → last checked (UTC) | Grade | TLS | Certificates | Addresses |
|---|---|---|---|---|
| 2026-10-15 03:44 | A+ | TLS 1.3 | 0ec2d48aa8109372… | 198.49.23.180, 198.49.23.181, 198.185.159.180, 198.185.159.181 |
Other domains on the same certificate
- sqspcdn.com 6 names
- campaign-preferences.com 2 names *.campaign-preferences.com
- sqsp.net 2 names *.sqsp.net
- squarespace-mail.com 2 names engage.squarespace-mail.com *.engage.squarespace-mail.com