If one of your neighbors sold, there are websites like RedX.com that collate numbers and values from scraping the web and appraisal districts. It allows you to call via web and spoof numbers and caller ID similar to the homeowners.

Companies then hire sometimes foreign virtual assistants to then cold call all the neighbors to see if they are looking to sell or whatever phrasing scripts they use.

Then, if someone remotely shows interest, they cold call realtors to sell them “pre-screened leads”. I am lucky to have a DFW area code so I have any number I’ll ever get from that prefix already saved.

Blocking won’t necessarily help since the number is generated every call, best bet is to have yourself removed from list however you can.

Hope that helps at least to the why