Telemarketing scams use every telephone area code that exists, and quite a few that don't. Unfortunately, it is very easy for anyone with a PBX (business phone system) to send whatever number they please instead of valid Caller ID data.
There is not a country code for 935. There also is not a 935 area code within the states. This was probably faked for telemarketing use.
Area code 918 (and overlay area code 539) serves Tulsa, Oklahoma, and nearby communities. Since there are thousands of phone scams operating every day, there is quite likely one in the Tulsa area.
In the United States, the number 01610 is the zip code for the Worcester, Massachusetts area. Internationally, the code 0161 is used to dial a number located in the UK. If you receive phone calls from 01610, it could be telemarketing or a scam to obtain personal information.
It is very easy for an unscrupulous telemarketing company to "accidentally" mis-program its telephone switchboard to send nonsense for Caller ID data.
The 874 area code is an invalid unassigned number. If you are getting calls from this area code they are being "spoofed".
The area code for London is 020, or +44 20 from outside the UK.
Area code 909 is in southern California, including San Bernardino and Ontario.
Area code 803 is the area code for South Carolina and one of the original area codes established in 1947. Back then the whole of South Carolina used this area code, nowadays upstate uses area code 864 and the coastal region 843.
Ghana, a country in western Africa, uses telephone country code +233. Legitimate businesses and individuals in Ghana have telephone numbers beginning with +233, but there are also some scams originating from Ghana.
In 2009 the area code 773 stopped being in use for the city of Chicago. Instead the state employed a wider area code for the city and its suburbs rather than using two or more area codes for the full area.
The area code "258" is currently an unassigned area code. The closest area code to area code "258", is area code "260", which is assigned to the state of Indiana.
Every area code is used by some scammers, but 301 (southern and western Maryland, including the Washington, D.C., suburbs) and 616 (Grand Rapids, MI, and nearby areas) are ordinary area codes mostly full of legitimate numbers.