Receiving calls from 877 numbers can be frustrating, especially if the calls are frequent and come at inconvenient times. While there can be various reasons why 877 numbers keep calling you, the most common explanation is that they are telemarketing or robocalls.

Telemarketing calls are a common form of advertising in which businesses or organizations use phone calls to promote their products or services. These calls are often made using automatic dialing systems, which can dial a large number of phone numbers in a short period of time. In many cases, the phone numbers that are called have been obtained through various means, such as public records or third-party data brokers.
Robocalls, on the other hand, are automated calls that are made using a computerized system. These calls are often used for telemarketing or political campaigns, but they can also be used for fraudulent or illegal purposes. Robocalls are especially common on mobile phones, as many people use their mobile devices as their primary phone number.
If you are receiving frequent calls from 877 numbers, it is likely that they are either telemarketing or robocalls. In many cases, these calls are made using spoofed phone numbers, which means that the number that appears on your caller ID is not the actual number that is calling you. This can make it difficult to block or identify the source of the calls.
To stop receiving calls from 877 numbers, there are several steps that you can take. The first is to add your phone number to the National Do Not Call Registry. This is a free service provided by the Federal Trade Commission (FTC) that allows you to opt-out of telemarketing calls. Once your number is on the list, telemarketers are required by law to stop calling you within 31 days.
Another option is to use call-blocking software or apps. Many mobile phone providers offer call-blocking services that can be activated on your account. Additionally, there are many third-party apps available that can block unwanted calls and messages.
If you are receiving robocalls, you can also report them to the FTC. The FTC has a website where you can file a complaint about unwanted calls or messages. While reporting the calls may not immediately stop them, it can help the FTC to identify the sources of the calls and take action against them.
In conclusion, receiving calls from 877 numbers is often a result of telemarketing or robocalls. These calls can be annoying and difficult to stop, but there are several steps that you can take to reduce the number of calls you receive. Adding your number to the National Do Not Call Registry, using call-blocking software or apps, and reporting unwanted calls to the FTC are all effective ways to deal with unwanted calls.