ZIP 34042 at a glance

USPS status
ActiveOn USPS’s APO/FPO/DPO table as of October 1, 2026.
Post office
APOArmy Post Office, used by Army and Air Force units. Several older public ZIP sources agree it is APO, 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 34042

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 34042 restricts

USPS lists 13 mailing restrictions for this ZIP, 8 of them bans on specific items. Restrictions are set per ZIP, so another ZIP in the same region can differ.

Can’t be sent

  • Securities, currency and precious metals(A)
  • Cigarettes and all other tobacco products(C)
  • Firearms, except to or from official U.S. agencies(F)
  • Weapons of any kind(F1)
  • Replica weapons, inert explosives and weapon parts(F3)
  • Fruits, vegetables, live animals and live plants(M)
  • Alcoholic beverages(R)
  • 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 Registered Mail(N)
  • No Priority Mail Express Military Service(V)

Box R and Box C mail

  • Box R (retirees): 16 oz max, plus up to a 90-day supply of TRICARE medications(U)

Allowed exceptions

  • USDA-certified, sealed meat products such as jerky, salami and sausage. USPS also lists 200 g of tobacco per parcel as duty-free.(W)

USPS codes for 34042: A-B-C-F-F1-F3-M-N-R-S-U-V-W-Z1. What each code means.