According to Verizon's website. there is no 771 area code in North America (USA, Canada, etc.).
Mexican area code 771 is the area around Pachuca de Soto, Hidalgo. Landlines are +52 771; mobiles are +52 1 771.
An international number beginning +7 71 is a landline in Kazakhstan.
(The plus sign means "insert your international access prefix here." From a GSM mobile phone, you can enter the number in full international format, starting with the plus sign. The most common prefix is 00, but North America (USA, Canada, etc.) uses 011, and many other countries use different prefixes.)
The country code and area code of Natore, Bangladesh is 880, (0)771.
The country code and area code of Donaueschingen, Germany is 49, (0)771.
The country code and area code of Nanning- GX, China is 86, (0)771.
The country code and area code of Raipur- Raipur, India is 91, (0)771.
The country code and area code of Pachuca- Hgo., Mexico is 52, (01)771.
The country code and area code of Funai District- Kyoto, Japan is 81, (0)771.
The country code and area code of Babol, Iran is 98, (0)111.
Mobiles are not allocated on an area-by-area basis. The number could be anywhere in the UK !
The country code and area code of Changhua, Taiwan is 886, 47.
The country code and area code of ChillÌÁn, Chile is 56, 42.
The area code 888 is an established toll free number
The country code and area code of Asturias, Spain is 34, 884.