nˈɔːɹθ ɐmˈɛɹɪkə fˈoːɹ, ˈɔːlsoʊ nˈoʊn æz ˌaɪˌɑːɹbˈiː nˈɔːɹθ ɐmˈɛɹɪkə fˈoːɹ, wʌzɐ nˈɔːɹθ ɐmˈɛɹɪkən ɹˈʌɡbi jˈuːniən kˌɑːmpətˈɪʃən lˈɑːntʃt ɪn tˈuː θˈaʊzənd sˈɪks.
North America 4, also known as IRB North America 4, was a North American rugby union competition launched in 2006.