請問呢個電話係邊度國家

Country code +1 is the US, Canada, and 16 island nations and territories in or near the Caribbean.

+1 XXX-XXX-XXXX
10-digit dialing - US/Canada

頭三個XXX係area code, 你要睇埋頭三個digit係咩先知道係美國定加拿大.
睇吓邊個area code match啦 ;)

US: (唔夠位post)
http://www.thephonebook.bt.com/publisha.content/en/search/international/record.publisha?id=L233

CANADA:
Province / TerritoryCodes

Alberta: 403, 587, 780
British Columbia: 250, 604, 778, 236
Manitoba: 204, 431
New Brunswick: 506
Newfoundland and Labrador: 709
Nova Scotia and Prince Edward Island: 902, 782
Ontario: 226, 249, 289, 343, 365, 416, 437, 519, 613, 647, 705, 807, 905
Quebec: 418, 438, 450, 514, 579, 581, 819, 873
Saskatchewan: 306, 639
Yukon, Northwest Territories and Nunavut: 867

044

1是美國，電話由美國開發，所以佢夠膽用number one 。