What is the phone numbers in different countries?

The toll-free codes in North America (USA, Canada, etc.) are 800, 888, 877, 866, 855, and 844, with 833 and 822 reserved for future toll-free use.

Toll-free numbers in the UK use 0800 and 0808. (0800 is a popular code for domestic toll-free numbers in many countries).

Australia uses 1800 and 1300.

Ireland and India use 1800.

Sweden uses 020.

Universal International Freephone Numbers (UIFN) use telephone country code +800.