pltw.org
IPv6: no public AAAA record — the domain is reachable over IPv4 only.
All 2 endpoints share identical configuration Select an IP for owner, ASN & location
A+ 199.60.103.130 IPv4 WHOIS › A+ 199.60.103.30 IPv4 WHOIS › Grade Breakdown
Protocol Support 90%
Key Exchange 100%
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_ECDHE_RSA_WITH_AES_128_GCM_SHA256
Protocol Details
| Connection | |
| ALPN | h2 http/1.1 |
| SNI Required | Yes |
| Supported Named Groups | secp256r1 (inferred) |
| Post-Quantum Key Exchange | No (no hybrid ML-KEM group such as X25519MLKEM768) |
| HTTP/3 (QUIC) | Yes (advertised) |
| Encrypted Client Hello | No |
| 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 | Yes |
| HSTS | Yes 1 year |
| HSTS Preloading | Not preloadedSubmit → |
| 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 1.2 | |||||
| TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | 0xC02F | ECDHE | FS | 128 | 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_RSA_WITH_AES_128_GCM_SHA256 | 0x009C | RSA | No FS | 128 | Weak |
| TLS_RSA_WITH_AES_128_CBC_SHA | 0x002F | RSA | No FS | 128 | Weak |
| TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 | 0xC030 | ECDHE | FS | 256 | Secure |
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA | 0xC014 | ECDHE | FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_GCM_SHA384 | 0x009D | RSA | No FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_CBC_SHA | 0x0035 | RSA | No FS | 256 | Weak |
| TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 | 0xC027 | ECDHE | FS | 128 | Weak |
| TLS_RSA_WITH_AES_128_CBC_SHA256 | 0x003C | RSA | No FS | 128 | Weak |
| TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 | 0xC028 | ECDHE | FS | 256 | Weak |
| TLS_RSA_WITH_AES_256_CBC_SHA256 | 0x003D | RSA | No FS | 256 | Weak |
Handshake Simulation
| Client | Protocol | Cipher Suite | Result |
|---|---|---|---|
| Chrome 120 / Win 11 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Chrome 80 / Win 10 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Firefox 115 / Win 10 | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| iOS 17 / Safari | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| macOS 14 / Safari | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 | Success |
| Android 14 | TLS 1.2 | TLS_ECDHE_RSA_WITH_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 | pltw.org |
| Alt Names | *.pltw.org pltw.org |
| Issuer | CN=GoDaddy TLS Intermediate CA DV - R1v1, O=GoDaddy.com, C=US |
| Validity | 2026-06-16 to 2026-12-31 (53 days remaining) |
| Key | RSA 4096 bits (sha256RSA) |
| Serial Number | 75E63A1250D89A1F |
| SHA256 Fingerprint | f27b1f2b85c6379b9d715c1ae81e66bf409b6c76b60c904d5ab5623bb56698d2 |
| Pin SHA256 | CbyON34yBxB2xeDvn62dgKaJUxDh3dOBE4YGQy7jKD0= |
Certificate Properties
| Type | DV |
| Cert Transparency | Yes (SCT) |
| OCSP Must Staple | No |
| Revocation | Good (not revoked) OCSP: http://ocsp.godaddy.com/ CRL: http://crl.godaddy.com/gdr1v1dv_s1-6.crl |
| DNS CAA | No (missing) |
| Trusted By | Yes Mozilla · Apple · Android · Java · Windows |
| Name Match | Yes |
| Validity Period | 198 days (maximum 200 days for certificates issued then) |
| Chain Issues | None |
Trust Chain Architecture
End-Entity Certificate
CN=*.pltw.org (Issuer: CN=GoDaddy TLS Intermediate CA DV - R1v1, O=GoDaddy.com, C=US)
Intermediate CA
CN=GoDaddy TLS Intermediate CA DV - R1v1, O=GoDaddy.com, C=US (Issuer: CN=GoDaddy TLS Root CA - R1, O=GoDaddy.com, C=US)
Intermediate CA
CN=GoDaddy TLS Root CA - R1, O=GoDaddy.com, C=US (Issuer: CN=Go Daddy Root Certificate Authority - G2, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US)
Root Certificate
CN=Go Daddy Root Certificate Authority - G2, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US (Issuer: CN=Go Daddy Root Certificate Authority - G2, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US)
TLS History & Relations
Everything our scans have seen for pltw.org, first seen 2026-09-30; current certificate since 2026-09-30.
Certificates served
| Certificate (SHA-256) | Issuer | Valid | Served |
|---|---|---|---|
| f27b1f2b85c6379b… current | GoDaddy TLS Intermediate CA DV - R1v1 | 2026-06-16 → 2026-12-31 | 2026-09-30 |
Addresses
| Address | Certificate | Seen |
|---|---|---|
| 199.60.103.30 | f27b1f2b85c6379b… | 2026-09-30 |
| 199.60.103.130 | f27b1f2b85c6379b… | 2026-09-30 |
TLS history (a row per change; repeated checks only extend it)
| Since → last checked (UTC) | Grade | TLS | Certificates | Addresses |
|---|---|---|---|---|
| 2026-09-30 15:56 | A+ | TLS 1.2 | f27b1f2b85c6379b… | 199.60.103.30, 199.60.103.130 |