Landline and mobile phone services are available in Nepal. Network covers Kathmandu, major cities and towns and most of Nepal, except some rural Himalayan places. Nepal Telecommunications Corporation at Tripureshwor, Kathmandu, is the national service provider. There are also private service providers. Hotels and private communication centers also provide long distance telephone and fax facilities.
For calling from outside, country code for Nepal is 977 and the area code for Kathmandu is 1.
00 + country code (977) + city code + telephone number
Example to call Kathmandu-: 00-977-01-4443103
Internet is widely accessible in Kathmandu. There are countless Internet cafes and communication centers in the Valley and around the country. Wi-fi services are also provided at various hotels and restaurants. Visitors only have to find a place they are most comfortable in to use the facilities to keep in touch with home.
The Central Post Office located near Dharahara Tower, is open from 10 a.m. to 5 p.m. Sunday through Friday. The counters are open from 10 a.m. to 4 p.m. and provide stamps, postcards and aerogram.
Visit webpage- http://www.gpo.gov.np/ for more info about the postal service in Nepal.