Outside the reach of the US pretty much means countries with hostile diplomatic relations. Any safety you might be afforded by other countries (say New Zealand or Sweden) depends on if you are worth someone in DC picking up a telephone. A quick check over at the State Department website gives us a few candidates:

  Belarus - Nope. Most of the DNS infrastructure is hosted in US friendly countries (Poland, Russia, etc.)
  Burma (Myanmar) - Nope. Getting a domain requires being friendly with the government.
  Cuba - Nope. Requires physical presence in Cuba.
  Democratic Republic of the Congo - Nope. Registration open to anyone, but DNS servers are in the US(!), Sweden, Republic of South Africa.
  Iran - Maybe. Generally open for registration, and one of the more tech savvy sanctioned countries. Don't mention politics, religion, porn, or any other sensitive topics and you should be ok.
  Libya - Nope. Democracy is on it way, please allow 6-8 weeks for shipping.
  North Korea - Nope. Must have presence in country for registration. All infrastructure and management actually takes place in Thailand.
  Syria - Maybe. Hosted and managed in country, but a shitstorm is on the horizon.