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, 29 Jan 2026 05:20:15 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=D5F3500F53D1E68F6B18A17253CF6D4B~-1~YAAQi6bQFwkNfACcAQAAResxCA+ryHDMnJOMsdnhYkxW14r62I6K13nOTbf9y9huR2qO+8KXWS3xxBgRHdGAWzk9syw1YjBvkbMumy1PGBITkxGwiI04C+8PLMAKb7Rnl6sermHb3yGXuxfSljvVRL/5zEn9C4ORsvtomdTL9moCp+mP8qDt0Ll3y/zuHs3d/uhrKqB+JBQKqMoXH92Yz0KgfznbLGuxxugjUipxiP3KOu00HOtMsFq/tOzXkpQDZXB8ykUMv81j+yQ57MeCQaBoXk5g8vpD/qUseagLq51b3+Uui+8kuJ5Kilt4zFh/yW55S5xsJlpH/In/mHJenNPNIxgJJOBvt/uBk7k9XyKHZen5WaJJGq7B0k5JsnodBvJOl3BNWaaRE+PaCZ3IdD/p3xunz3JytSNK41KgNkOl3nIqLkJRUEXlt28lPBPnrTaD/VJLZ+y/9ow=~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Fri, 29 Jan 2027 05:20:15 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=898F30D917A3474496A93819B13FE816~YAAQi6bQFwoNfACcAQAAResxCB7t8bYlratrcCtR8yvrMUqcAZttBgJp6MbptHYnQQ129oBP5nwMjw64/4BhrlOBipijxEoIg5odnJWZVchjTC6IYpZHeK2LsP2Ez3nNIWV7f9Yv7Mw2BwD4IaOTICRT3hzM/AAOp1uiLJvT+Ylep2aMx2ecd/uvWHypIz6Ter/WRAkdmYfyfK3jSQlQYVmJTqHyyI2wHO5WeIUOAo4TUBMK57+8nSvKt48vZlLDaW66k8Z7kqO48Lr73+5I0rjtFeU6MLV7LgDTFGZdw+Iedse1a2uwFiSYIV+iGVxX8Y8BP2CwjuQMl0CvLL5ll3x63jYbJhsvbyMhU5FTHz5347z59J/aBQ2+G883XjqbwwCuRwI=~3551793~3159863; Domain=.nba.com; Path=/; Expires=Thu, 29 Jan 2026 09:20:15 GMT; Max-Age=14400

HTTP/2 200 
x-xss-protection: 1; mode=block
x-amz-version-id: q9rz4uxrv4W9aWq42XtvIaT2KxZ0E2cS
x-frame-options: sameorigin
x-content-type-options: nosniff
x-amz-server-side-encryption: AES256
x-amz-request-id: 1VP2B5EEHZ51ZVSF
etag: "657c1b16bd96357065ea9c68d553b85f"
content-type: text/html
x-amz-id-2: x2o8WS+OusK0dMRO0PkbG2oJkJYoROGa8puPg5ekbQjU618tRR3p3TInxAaQrvL3vwt5h+Adt+kSTs1ow9QMkTtjo4SpHXlW
cookie: nbaidentity=; cms-dev=; nlhasnbaid=; nlhasnbaauth=; region=; postal=
cache-control: max-age=29
date: Thu, 29 Jan 2026 05:20:15 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=C09C4D4DC170AE34722ADDB7CDC41AD0~-1~YAAQi6bQFxENfACcAQAAo+sxCA/ZgayewSH1EKiZL6wv/wkvE1WWVGcJRkBpUmNFFCCq6dZncuuTxzB86HBRt3cCED+tW6989J7lXd6n1KZq6LX72ZFDS6BVchlEeE1xRALW2id0KhECPBgbEkHH+UMH18m8rPmvrVVVb/B+AnlaAtdeP17HfRwh/rQSmTSGlFTnF+YMWvYbU7bQd4OJimJFcAnfMbH5SG9PZT4aR8cDxN/ppcRJaXhicGwbld6Nt4nY88m0/jkRlBxdHggIS1Blv3zMVVu50baNGsCa9WduD4qT99V2HiIi6XQDShX2jpePo1Q81ZJJ7hVRlnu16SsuTP9YQuGKmEJWjuSYnraB5f4vcv/i8ub6lPM0w0J+PHeBXOduwXTb625L8VpomWUGDxKgl+TLekW53q93FksCPEB8qwF+bGkr1uFAsxozU4HW1HZcj2QS6IU=~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Fri, 29 Jan 2027 05:20:15 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=179C49D15673BE53ACD51C92CFB175CF~YAAQi6bQFxINfACcAQAAo+sxCB5M/xTdDzEM266mGciqBzz614s/jvPwgh75i30Ytk0LrBxokmwHHXb+A//zfgZdBoN+zS61YufEBr2RmFD1lsWb0z7Nl4axgmlXwz1psV3IRV7cEgOMJueiT3GHlaERpz0ZpFxsz38dR0N8OFffLe3XOwIiIuMIGiQlOnmCYYz9DCTK/jV9ob6jgGs+HXpqxMqIfTmdabprm0fjGhc3mcdgbkhPf2kHzv1qwKrpnkysv2rMatps6iRzhzpx88jcFgHnO/sQUfypFXDa7uXW2sgIjTdPhn+/++okzsulCtP0XwXLWuOKO8//N0gz8P1DKVBtwedvrNUzMiXHAsNv1WoaYzlYQUgeiUFtTjBex26cmgE=~3551793~3159863; Domain=.nba.com; Path=/; Expires=Thu, 29 Jan 2026 09:20:15 GMT; Max-Age=14400