| Prefixes # | Cont. | ID | Country | Prefixes |
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1 | NA | K | United States | 68 | 98.6 | AB4 AB5 AD0 AD7 AG9 AJ5 AK5 K0 K4 K5 K7 K9 KA0 KA5 KB0 KB5 KB9 KC0 KC5 KC8 KC9 KD5 KE4 KE5 KF5 KG4 KG5 KG6 KI4 KI5 KJ4 KK5 KM4 KN4 KR0 KS0 KU4 N0 N05 N1 N2 N4 N5 N7 N9 NA0 NO5 NR5 W0 W1 W3 W4 W5 W7 W8 W9 WA0 WB0 WB5 WC5 WD5 WD8 WD9 WE5 WF4 WK7 WR7 WW2 WX0 | 2 | NA | KP4 | Puerto Rico | 1 | 1.4 | |
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