Mobile Numbers: Why does the Indian mobile number start with +91? Know here...

Indian mobile numbers start with +91, but have you ever wondered why? The reason for the Indian mobile number starting with +91 is the International Telephone Numbering Plan, which is managed by the International Telecommunication Union under the E.164 standard. This system assigns each country a unique country code, which is used in international calling.

ITU allocated the +91 country code to India in the 1960s. This code ensures India's identity in the telephone network internationally. Every country has been given a unique code. America: +1, UK: +44, India: +91, China: +86, Regional classification: ITU has divided the world into 9 zones.

Zone 9 is set for India and the countries of South Asia. India was given the code 91 under this zone. The first digits of mobile numbers (e.g. 6, 7, 8, 9) are determined by the Telecom Regulatory Authority of India (TRAI). The current mobile numbering system in India is 10 digits.