Find the Web Server that a web site runs on

This program detects the web server that a site is running on.


example: facebook.com

ERROR: Web server not shown in header.

HTTP/2 301 
content-length: 0
location: https://www.nba.com/warriors/
date: Wed, 14 Oct 2026 01:43:44 GMT
x-frame-options: sameorigin
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
strict-transport-security: max-age=86400
set-cookie: _abck=7B7C376A2BE99A416355BD001EE96C61~-1~YAAQqRMoFyLf2e+gAQAAGWsUOBCPC+kWzHgz5JTB4x82HORCLaa6vk1IZRovrXdIt8LLbG0pTw5BMVR5OpV6bqhsGJBMvcZt+8e83w+3HLS372hp2v+sUe04qZ+dgAh/8tCK6MwZ/HgETmR2k7ox8lUZFw/gcIyHgG4PjXlbpT2WK7e0pO4kc+br80/mMe4wcnrb++PTMextDsFXpHxOln0G27XMuHdbbTJJwSEzu0CHjp5sEvOTLBMrOXdAHQM68Pgdk27GfTxZ/yDFntzkJ7/LBe1uu4mZbdG97bXejsx3XCHlp2yQ6tZpg5uuIS8fyWlHV7aUx7iNnSScYWlGFbBb7c/zxh5y9m6h8CPtcsYRMHCIjf5+51Z/khnqGiM01RNN9n1hXbuBQC199G+mLuZYtSZngBUS4R3LHE7YO0Q7kjfNVeKnOCr2PhXbTivWUKR9vVr56xuYLk5f~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Thu, 14 Oct 2027 01:43:44 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=E7BD84AF8EF13B5768733C072CACE72F~YAAQqRMoFyPf2e+gAQAAGWsUOAEpBUDNiRmkTso63FN40zQsn91Q1wEptEa9TVHjxRJI9zfkxw4Ex5H7zEmiX1i5ZhEFZhjok/upWuTJqS0HzEPiL3U5NlmwHulBE3QGulurNxs99+eME3G4IGO8Ygns6skanWv/ZjzFdzPlqPzdrEzj7IPbcI/BqaJAc6y+hNIztMZukeNJ020TL78WG7nxPCBlqYVV9P0M1TKDv0yVoK8+mRoK2E8JQ/N+DHrq/N2G17OTE9P6iI7k4+j3DrHHPOmTX0JLKh/Z4plh3uduFgHIRFqUqEZuNWFkOV8nICi1UoRaaxbSJ2DUiWFiBrIMHolLcsc617zv7DgHhOI8R9gddk8YsE979pP9dC+zr55N8nA=~3224386~3224371; Domain=.nba.com; Path=/; Expires=Wed, 14 Oct 2026 05:43:44 GMT; Max-Age=14400

HTTP/2 200 
etag: "38531604b2d5741c059961a85bcf630f"
x-amz-id-2: dln9lx+bSV//KGza2kaDMcYf00bSbVNEqe2gO7e9gu/hA5tU8S8cy4JFID4G6/MgCmycLAgk3ScPOg149aA2t3SnhIUBPdPq
x-frame-options: sameorigin
x-amz-request-id: DG19X7G32F9ZS4XY
x-content-type-options: nosniff
content-type: text/html
x-amz-version-id: Gsmu53uuWkQGxUAwy3vX8Bgfmf5jeKLg
x-xss-protection: 1; mode=block
x-amz-server-side-encryption: AES256
cookie: nbaidentity=; cms-dev=; nlhasnbaid=; nlhasnbaauth=; region=; postal=
cache-control: max-age=30
date: Wed, 14 Oct 2026 01:43:44 GMT
x-frame-options: sameorigin
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
strict-transport-security: max-age=86400
set-cookie: _abck=0A83D69D95BD0FF09F3C0A2B02F5B10B~-1~YAAQqRMoFyXf2e+gAQAAmmsUOBD1JXWH0zueW8EzZzHtP57TK9F+jokwPfxTlP8FG3QbfidzYkcge1rdhVVG3z1KTk1sXjdQOk7xtJdAk/uZ22/+DrRzvHdwJg8Wnc3WG4vzfTR/8MTy0u99h2o9vUUCkjWcsyybCoPuBpRwj7scQPH+yF3jHqyxXhpevd1zT+9xZGeUmQuqaqgrs3fp4CjIwIZ+W8x2TxNtVXrSWgBEIrhQ+aU5AgriHlzzLJfB5QY/FwlIDdiktbzCc5rwXRiLTmJquKA19Af6MBT0ZRUhhm+9AH9ALOydUxnPfzaJK6QAaZZskcs68nk0OvP5oRLZfus8zo+W/W4okK+AXgVKbMnwjR8b8s18tE7cJPbh0i67eNK8UIekX4vC+EawvcdwVzJJLIp2gKTdhXKiW4TD/On5lRqM0QnQc/v1GuyjVMCSPZX+7O/lHKq3~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Thu, 14 Oct 2027 01:43:44 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=4EC4A21811B0F830A326D2AB4AA8B90C~YAAQqRMoFybf2e+gAQAAmmsUOAGFbs61MPEMtHL/A5TxbXLiOrsicy1ZC7RzOL+zb2l9d+GM5UT1TTJxJbkVWOvXMz8WBC+H3H8UEYh/1slbOmm1EX9y0dVtyEKNNGIpJnmMhbT3NJsnOGyU2VztPdNIdcQ9GdBafT3Zb4TpZo0AS3Kmi9Bn7/yLHj/0ZA2UwThIO6TA2sKFk9aor81vk2DdN+vCEEqOEyX1K9lzeld1uTA9D0Nk53t3IBK5t1te4NNnyrYBKKQ47x5laMk9Sx8Yhuyu6AEyjoZm4mFnMWt4igAdyqDkqLtityDUDzG0rtqCyQW/JDecwU9eWsGf/YyildWu4JX8bMFLFYBJfbTRyWmjVuRre9Vq9zPqqfRy24Ef2Es=~3224386~3224371; Domain=.nba.com; Path=/; Expires=Wed, 14 Oct 2026 05:43:44 GMT; Max-Age=14400