ZIP 34091 at a glance

USPS status
ActiveOn USPS’s APO/FPO/DPO table as of October 1, 2026.
Post office
FPOFleet Post Office, used by Navy and Marine Corps units and ships. Several older public ZIP sources agree it is FPO, but no USPS bulletin since 2022 mentions it. Confirm with the recipient.
Region
AA, Armed Forces AmericasCovers Central America, South America and the Caribbean (not Canada).
Delivery group
Central America, South America and the CaribbeanUSPS groups ZIP prefix 340 together for delivery-time estimates.
Exact location
Not publishedUSPS and the Department of Defense don’t disclose which base, ship or embassy a ZIP serves. That protects the people there. If you need to know, ask the recipient.

How to write an address for 34091

Use the recipient’s own unit and box. The last line is the only part this ZIP decides.

Don’t add a base, city or country. If a form asks for a country, choose United States.

What ZIP 34091 restricts

USPS lists 12 mailing restrictions for this ZIP, 10 of them bans on specific items. Restrictions are set per ZIP, so another ZIP in the same region can differ.

Can’t be sent

  • Cigarettes and all other tobacco products(C)
  • E-cigarettes, vapes, e-liquids and their parts(C2)
  • Nude or sexual material and unauthorized political material. Bulk religious material contrary to Islam (single personal items are allowed).(E2)
  • Radios, cordless and cell phones, GPS units, scanners and transmitters(E3)
  • Firearms, except to or from official U.S. agencies(F)
  • Weapons of any kind(F1)
  • Replica weapons, inert explosives and weapon parts(F3)
  • Alcoholic beverages(R)
  • Brewing and distilling supplies (hops, malt, yeast)(R1)
  • Synthetic cannabinoids (K2, Spice)(S)

Paperwork and approvals

  • Customs form PS 2976 or 2976-A for anything 16 oz or heavier, and for any merchandise at any weight. Priority Mail Express Military Service needs PS 2976-B.(B)

Size, weight and service

  • No Priority Mail Express Military Service(V)

USPS codes for 34091: B-C-C2-E2-E3-F-F1-F3-R-R1-S-V-Z1. What each code means.