Calls between the two sides of the island count as long-distance, with each side having its own phone code . To the Dutch side, dial 00 plus 599 before the seven-digit number; to the French side, dial 00 plus 590 before the six-digit number.

There are post offices in Marigot and Philipsburg.

Most hotels will let you hook up to their internet connection for a nominal charge. In Philipsburg, Parcel Post on Front Street (Mon-Sat 9am-4pm) offers internet access, as does Cyberzone in Marigot, opposite the tourist office and museum (daily 10am-8pm; around US$3 for fifteen minutes).