According to the North American Numbering Plan, the area code 526 has yet to be assigned to an area in the US and has been reserved for future use.
526 is the country code for Mexico (52) and covers Band 6 (6). Band 6 includes Altata, Aguascalientes, Celaya, Choix, Culiacan, Durango, Fresnillo, Jalapa, Guamuchil, Zacalecas, La Paz, Baja California, Leon, Los Mochis, Poza, Rica, Queretaro,Quinones, Vaja Ca.s, Silao, Tamazunchale, Tamico, Tam, Tepehuanes and Zacatecas.
Check out this area code lookup for all US cities or use the area codes locator to find which city a phone area code belongs to at Allareacodes.com.
Phone call scams have become so common that most of us don’t bother even picking up when we don’t recognize the number. However, as we grow wary, scammers get savvier and find ways to get our attention.
Here's a list of some area codes you might want to watch out for from Lifehacker.com.
Tip! How to call Mexico from the USA/Canada? Visit Howtocallabroad.com to find out.