BULK Whois Domain Availability Checking Script

I need a script that can bulk check for domain availability, I need it to do at least 250,000 checks per hour. I'm not sure how you can do this or if it is even possible, open to any suggestions. I would like the script installed on my sever also and seen to be working. NOTE: I'm looking for someone who already has a working script, I do not want one custom built. NOTE: I do not need to scrape whois data, I only need to know if the domain is available in the most accurate and efficient way possible.. Please answer the question below after bidding, or your bid will be ignored 24+6= Thanks