Code for implementing IP address access restrictions using ASP code

This was previously written in ASP. I wanted to change it to ASP.net. Later I wanted everyone to understand the algorithm. The key to IP address comparison is the linearity of IP addresses. The following is the code. Copy codeThe Code is as follows: 'IP address that can be accessed
'2017. 7.44.0-218.7.45.253
'61. 180.240.0-61.180.240.253
'192. 118.208.0-202.118.223.253
'
'2017. 7.44.0 218
'2017. 7.45.253 218
'
'61. 180.240.0 1035268095
'61. 180.240.253 1035268348
'
'1970. 118.208.0 202
'192. 118.223.253 202
Ip = request. servervariables ("remote_addr ")
Sip = split (ip ,".")
Num = cint (sip (0) * 256*256*256 + cint (sip (1) * 256*256 + cint (sip (2 )) * 256 + cint (sip (3)-1
Response. write (ip)
Response. write ("<br> ")
If (num> = 3657903103 and num <= 3657903612) or (num> = 1035268095 and num <= 1035268348)
Or (num> = 3396784127 and num <= 3396788220) then
Response. write ("sorry, your ip address is invalid! ")
Response. End ()
Else
Response. write ("your ip address is valid ")
End if