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: Sun, 20 Sep 2026 16:29:12 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=4D445138B67E2B49291870DE5D399FA8~-1~YAAQ+CTDFwjqn7+gAQAArnamvxDNTgnplW002hlX1bDlbJLE03MXNC4vadg5WSb+PCOeLy5n8HUs1gnKkAP7hxTtA//wdnbJW6sbW9VsEUB1cu6JqYC68j2+M7N30nNIO/iQDob3Xbq1BNIrI+GAS7VH7xB5lxPZ1c6RTrvLjBNN8mSIAL04M7odg2u/0UchqrwOy5FlQiBGwt9gALFIY7Y/H7n2vh68yFOZw301ltA+00tSurHVjWyT7HYflAKZkXZvPclklxTpZEgErhc2U+DbzSj555Rw3kdsdPOPIqdaZvobd0PqhB/cI1K579BzD+HKr4r/W1yz6sVN96voWyiXfSbb47FEEMrGwSUhD4VEHjqwH3jPWe9b/r6YUb4xfJhSp67UWq/lD5cNC3+uGNr6Hq+workPDe20N5FyGje7VoocDW/iqasP6TPUjKyiP6kDKmEnqFZFrH2W~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Mon, 20 Sep 2027 16:29:12 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=620B074DE044DFDCD299A71CA4B06346~YAAQ+CTDFwnqn7+gAQAArnamvwGcQXYusxVFgl9F4SGe8iWG91pLaqWEdM00K4z2klmVdXmEQDAIxhTfd7gWNlTxkAqzz3/ddbo9ACbH7Q/g7QVIHzqFIqd2/l7phl7u/X7IJli2uNQVUCNOA57+AHvys0qQPvN74mmbgVSXEIjjiz/YXD0hmav9wL3aip0V1mxLecdPxXhQXfKzZpeXeb2vKHr5RmAw9NEOgQ1CCLHT7LOV7bQB5034aw0/T4boa7AnjQiFHjBzmbqBb+nL4UaBeKQ8ai6bK3Iex+wtmbY7HD54EX/ljbfUz2Wes9uqh+Ys/Wq4OFKnmP8b3vTZDA4165hu7MdSrLqR/ZrLoK+pVwmU2IsGlmHhpFep2UCz2OvsIBY=~3753520~3224886; Domain=.nba.com; Path=/; Expires=Sun, 20 Sep 2026 20:29:12 GMT; Max-Age=14400

HTTP/2 200 
x-content-type-options: nosniff
x-amz-version-id: 3hrvj1OAsq1.3kWwmEe_x1XRKonfJQqC
etag: "6ba2f270dd9fa5ee3d2eb32f7b08fe54"
x-amz-request-id: E73Y1GHMNYNNT5XS
x-frame-options: sameorigin
x-xss-protection: 1; mode=block
content-type: text/html
x-amz-server-side-encryption: AES256
x-amz-id-2: FV5E4h1Jh/5RXYD4nO0aluNcBJZwDIDC19aOa4sN9l3b7Fa7J0iKwo5zZKylBJArXMAX2HhU89U=
cookie: nbaidentity=; cms-dev=; nlhasnbaid=; nlhasnbaauth=; region=; postal=
cache-control: max-age=30
date: Sun, 20 Sep 2026 16:29:12 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=CB4AF1EA34BDAF92EB406C6339B416FB~-1~YAAQ+CTDFxPqn7+gAQAAlHemvxDCRm6ZTIQOSTGGTyzf7C2xc64l0Rq3pSWZ4Pc8V7BuoKSOVZ9gk4cIXhj+15Uzph0uwejIpv1z69X2+xkXT8P2S2wQk2TRORuqtXToECe8HvZy0hVgVEtnl5JuspbT9RicVgr5G5Zogo4nOS8hxud5/o4sq1LIsenAcvRyQCAeukKlyOja2O3Y7Ud5Eber2gZl3hv3mTUN9LSUZYRzs03wjGwjS3UH0hc/QGo1ur9zp28c6XRe2PHg8+QgNqWvmwEQM0ChJ6KO6dsyeDB1NltBZJbG0kb7dQs+CuoAzd5sJb8rPmuZQJ1mStlT1kfo1zTgj1tMtd8fjiGVRAmdO8hFrXy2bqeghdVgNwvFM4Rv6QbYbjtwPKa9Mrx2kbXx2bBnuKqtcgy1ooHDNL9N5T3dPGt/QuCXRP8d3SbapKLUOW1BzaUmRQbc~-1~-1~-1~-1~-1; Domain=.nba.com; Path=/; Expires=Mon, 20 Sep 2027 16:29:12 GMT; Max-Age=31536000; Secure
set-cookie: bm_sz=DF025BA9F06BA871E449B14AEF222BD4~YAAQ+CTDFxTqn7+gAQAAlHemvwETIFb64Nb0mJWg835gvSTGD/oGDpKwGaR53iKwG/pspz0u94mp026fUhr/ukUlcCXfNsAY2cpZkRcq2V9z+C17QPZ4WETZ5wPTG29hPKTZbrS7sqUKbAEclUknqCZLQ9z+pSza6lcPna1tC2lym4GI9/dAycYPYr4QOQuRvBG/Nli76zUvc/bSkw7iSIVagCDd+B//kbD45+lyGcesRGX3s9Ex2S0E/hXbNuAurtVUg/qpCxq8aGQsNmzjytkiPMdxiZrPgOoDkIe/e59+9bjGkmjpCwVx0wpuOhgntIlUsrhQOSh3882EI2hMyKhEewez8aZGshWWEfv9L26rPL84uc4wX6mLfxWKgMBhbYLCbYk=~3753520~3224886; Domain=.nba.com; Path=/; Expires=Sun, 20 Sep 2026 20:29:12 GMT; Max-Age=14400