Bonaire

The previous code of 7 has been replaced by 717 
as part of a plan that converted all numbers from four digits to seven digits.
Telbo Cellular numbers begin with 78; Cellular One numbers begin with 79.
See http://www.infobonaire.com/html/telephone.html for more.

Curaao

9 plus seven-digit number
Mobile phone numbers begin with 6

Saba

416 plus four-digit number
Windward Island Cellular 416 plus four-digit number beginning with 5

St. Eustatius

318 plus four-digit number

St. Maarten

54 plus five-digit number
Mobile phones 51, 56, 57, 59, 553 or 554 plus four-digit number.
See http://www.cyserve.com/ANNP.html for more.