The legality of using ISP proxies depends on their application, such as SEO, SERP, or marketing.

For example, is web scraping legal?

If you're using proxies for web scraping, the legality depends on the targeted URLs. Scraping public data from platforms like Facebook, Instagram, LinkedIn, or TikTok is legal. However, scraping private data from websites or personal pages is illegal.

Therefore, it's important to carefully assess the use of ISP proxies.