Country code to call United States is: + 1
for cheapest call charges to United States  landlines click here

How to make cheap international calls from your landline using call-through companies below:
1. Dial low cost access number for the United States mobile destination (cheap call rate)
2. At the prompt dial the international phone number starting with "00" and destination number (your international destination telephnone number).
3. Your international call's low rate will then be conveniently charged to your current phone bill.
For example to make a call to United States: dial chosen company's telephone number, wait for connection, dial you international telephone number 001 123 456789

As you can see using call through low-cost access numbers to make cheap international phone calls you can save incredible amounts on your phone bill. Without registration, credit cards or pre-payment. Don't need pin in comparison with a phone card. Compare call-through company's cheap phone rates with other telecom providers and start saving! If your telephone line is from BT you can confirm how much BT charges for these low cost access numbers by clicking here and then compare how much BT charges for international calls by clicking here. Huge savings for international calls, now you can make cheap telephone calls to United States and pay much less on your phone bill! We do not endorse or recommend any specific companies or services, we just offer comparison between cheap international telephone companies for you. Visit provided links to cheapest phone companies to find lates deals on how to make low rate international telephone calls.

For cheap international phone call rates from Ireland click here