Not necessarily. Sometimes I turn off the adblocker for days and still have the requests when turning it back.

Adguard Home or Pi Hole, in a device that, indeed, can be a Raspberry Pi.

I have an adblocker for my home connection. By far, Hue subdomains are the most common blocked ones.

Philips Hue sends data to servers every few minutes.

Nice, all my domains are there. Would you mind sharing the coupon?

Try usememos.com with well-defined keywords. The search works well, the calendar view is helpful and It even has an integration using Open API.

Very simple and powerful tool.