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/2 302 
content-length: 0
location: https://www.nba.com/warriors/
date: Thu, 08 Jan 2026 00:35:25 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=7C0BDE384BE4DB9C28FCEA1A2EDAA916~-1~YAAQmhMoF5weLiybAQAAT5wHmw99CoilhtGlwmtJ30gE2KY0qXM+ni9YTpyRCVdwX/1bjc2xg+GUFTgswteuOf20LVy5TQERagmcJRh4Z6csPWbCb6cy11DlBwFEGUbsBSgeP1iH9efyA6S4/krl9avIe/dKwftu6kKTMiKFXQ5DfTsel8yvOY2D4Fja4Kro/os0cMSVzVOcVCitOFqy0UveZCxvZStL7J0xUK2Q5ow3MO8/ddB9/oLssCmNIG934msim4ulJNO4mZ34OTQkjuPCpH6hhLk7Q0vdHUvKUP1Ov2PyW5SF1vJYWkj0Aka6vkemYGCM1BSjI5+Dn7Umys3MyIGgvmpfRmFrO+9bF41R+fv258XkkLGMGMYzDJq5h7p0wTHgrKOkpe2+qlQ311p0hltSOM2JBSc+WmXGX+dDQCUvhFxRbUANLr1wHjjp5YouL46g5GEs2sc=~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Fri, 08 Jan 2027 00:35:25 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=4E6A10440B45AB4198F82763C8B47EB9~YAAQmhMoF50eLiybAQAAT5wHmx48KrZn8fjqOJYj9TDwIgU/5215WCNnninVAk2Dp/zIwr1VCd28OKOndvfpozXTE9zrTXa5USaQFlTHiGLJ/6TwxjMKCd70u3efcOWhJthtUBsMVraGY50EwTSw8RLcrg4k+WEQT5PByVs9ul8Q1FSNiZ4DqCmczcJvj7ju3eTszeRp3vvxMmPfe9E9BXFbqrNt18NOqpyYHL7fMjp1Do4WvtZ6PCnfkL92sPaQQJQ1wyHDWzq0Lxn1nkOfNlVWw53abt7XXgBH6kQ+bH+K6DGcAMbE6fRtT9Ll57nVWvcaJJtyk8eqjxLrpUS1mO7OYuF3eHYwisL6qcEdgdLbAQB2Hh3GC25FED2R6ce4hco/hmU=~3359289~4600390; Domain=.nba.com; Path=/; Expires=Thu, 08 Jan 2026 04:35:25 GMT; Max-Age=14400

HTTP/2 200 
x-amz-server-side-encryption: AES256
x-amz-id-2: PxDvGK2IOozozhfE6Jx4Z/AiZCfr8ZSMdhmGCiD9Me/DS2YC6zDAE0OXqkm2xmTSJljWdKyhQeM=
x-frame-options: sameorigin
etag: "20b4fe70d6c58cb80cd6bdb436140513"
content-type: text/html
x-amz-version-id: 2192_StyZ9RkVH9mIu8pXVtfLNzfiTKf
x-amz-request-id: K8X5FM0F90CXZY1C
x-content-type-options: nosniff
x-xss-protection: 1; mode=block
cookie: nbaidentity=; cms-dev=; nlhasnbaid=; nlhasnbaauth=; region=; postal=
cache-control: max-age=30
date: Thu, 08 Jan 2026 00:35:26 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=E1875732A63E3D83DFA05E52A9961CAE~-1~YAAQmhMoF58eLiybAQAAOZ0Hmw/hkKeAAVDz0fNiC0TPCTpi1ry2xnVFfNCTN7ua6c9xOCT849XuL/4kzcGqKRyQLR67YDmrcqb97UQKkpB+P2itlN9+PM0b2zhgJuVfembtn6pahVTlaOke/P6XMG0RVhPAs5NRn2BtuC2G28cDwa+B3rq9HZOtOUO4qVlopenSbZxtE79IsMM9e/SZyHv+u+3h5zct0i4oaqSr1SuZYKdkx4dRoe5wq3s/Dkdwsg0zAYpmdAQGjsYkg3AbU/4UKomLCQLXzQucLSuYGblIMkAOva45rlg+Th0Fj4m6QNYVS7yyVS/eoqkjdeoAR3W+p6N9wf9VpSUHB1qL+R5j0Bwzmxw0D/+TTVFT0yuLh6JR8gtmZLth6EHWsZpcA4nS1icN7KiFAwNjZjBMUmDO8Nx0OjsnKMp0Q1vM+Q/4xu8EGebgTRopXhY=~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Fri, 08 Jan 2027 00:35:26 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=D44E2738A0E64D9D1034C1B6044E8432~YAAQmhMoF6AeLiybAQAAOZ0Hmx4hikuTOQsv1YuEbefYPCfoImhD3gMkvWM2LcN9zkOseKu5z5ZPXtHi7PznG4XNjjRKibxaayX554jSz/PpjG4ikUpCVZ5LoG78Xx3JLGQONAmt3ioqrkxE4AhwxmCEatdNCdFxF3kUCLsOhQf8FlDjJm6R81fUltwNwTHhxFB4u5c0aut95lIOv+lTbmnsz6Lpbmz4Xkp3neaVB8Si5x4eDFiu3tqpR1HJ9/4I4yHvkNzpNKp3P1tXJvCYOt/PdfOg4xmecPeo5mwtFtqQR1rw9DDyx72fjdeBpiGfwVRfqgTVYaKKawWJpOu4MbBEsCFCXf7SWPMY6TpaUXPWfs3C1NVug8hbsb8ZmufQzjZVad4=~3359289~4600390; Domain=.nba.com; Path=/; Expires=Thu, 08 Jan 2026 04:35:25 GMT; Max-Age=14399