Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 158.106.138.13 |
| Server Software | LiteSpeed |
| Compression | gzip |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 158.106.138.13
Server Software LiteSpeed
Compression gzip
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://norvig.com:443 | 301 | HTTP/2 301 |
| 2 | https://www.norvig.com/ | 200 | HTTP/2 200 |
#1 URL https://norvig.com:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.norvig.com/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 2.9 ms |
| TCP Connect | 91.3 ms |
| TLS Handshake | 100.2 ms |
| Time To First Byte (TTFB) | 281.6 ms |
| Content Download | 0.2 ms |
| Total Response Time | 281.7 ms |
DNS Lookup 2.9 ms
TCP Connect 91.3 ms
TLS Handshake 100.2 ms
Time To First Byte (TTFB) 281.6 ms
Content Download 0.2 ms
Total Response Time 281.7 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
Title Peter Norvig
Detected Technologies
| Technology | Google Analytics |
Technology Google Analytics
HTTP Headers
| Content-type
| text/html |
| Last-modified
| Tue, 17 Feb 2026 17:37:22 GMT |
| Accept-ranges
| bytes |
| Content-encoding
| gzip |
| Vary
| Accept-Encoding |
| Content-length
| 4290 |
| Date
| Thu, 23 Jul 2026 17:13:26 GMT |
| Server
| LiteSpeed |
| Alt-svc
| h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"; ma=2592000; v="43,46" |
Meta Tags
| Viewport | width=device-width, initial-scale=1.0 |
Content-type text/html
Last-modified Tue, 17 Feb 2026 17:37:22 GMT
Accept-ranges bytes
Content-encoding gzip
Vary Accept-Encoding
Content-length 4290
Date Thu, 23 Jul 2026 17:13:26 GMT
Server LiteSpeed
Alt-svc h3=":443"; ma=2592000, h3-29=":443"; ma=2592000, h3-Q050=":443"; ma=2592000, h3-Q046=":443"; ma=2592000, h3-Q043=":443"; ma=2592000, quic=":443"; ma=2592000; v="43,46"
