North Korea is Embargoed.

The U.S. department of Treasury's Office of Foreign Asset Control (OFAC) administers a program of embargoes for political or national security reasons. This program typically embargoes or blocks the assets of, and prohibits transactions with, any country and its nationals regardless of location.

It is the policy of United Parcel Service, including all U.S., Non-U.S. subsidiaries, and direct branches abroad to comply with both the letter and the spirit of OFAC Embargoes. United Parcel Service will not provide service to any country under an OFAC Embargo. This ban includes the transmission of mail or parcels to embassies of an embargoed country in a non-embargoed third country.