What is SWIP? SWIP (pronounced swipe) stands for Shared WHOIS Project. It’s basically a process for the ISP who owns the IP Block to assign or associate that IP Block to you, the client. This process will update ARIN so you can do a whois against that IP Block and it should show up as your company. ISP’s will BLOCK you from advertising this IP BLOCK if you don’t have that information in ARIN.