- New Iberia (ARA)
- New Orleans (NBG)
- New Orleans (NEW)
- New Richmond (RNH)
- Newport (NPT)
- Newport (ONP)
- Newport News (Fort Eustis) (FAF)
- Nogales (OLS)
- Norfolk (OFK)
- North Kingstown (NCO)
- North Myrtle Beach (CRE)
- Northway (ORT)
- Nuiqsut (NUI)
- Oak Harbor (NUW)
- Ocean City (OCE)
- Oceanside (OCN)
- Ogden (HIF)
- Oklahoma City (TIK)
- Olympia (OLM)
- Omaha (OFF)
- Orangeburg (OGB)
- Oregon (ONO)
- Orlando (ISM)
- Orlando (ORL)
- Oshkosh (OSH)
- Ottumwa (OTM)
- Oxford (UOX)
- Oxnard (OXR)
- Palmdale (PMD)
- Palmer (PAQ)
- Palo Alto (PAO)
- Panama City (PAM)
- Paris (PRX)
- Parkersburg (Williamstown) (PKB)
- Paso Robles (PRB)
- Patuxent River (NHK)
- Pendleton (PDT)
- Pensacola (NPA)
- Peru (GUS)
- Philadelphia (PNE)
- Pine Bluff (PBF)
- Pinedale (PWY)
- Pittsburgh (AGC)
- Platinum (PTU)
- Point Lay (PIZ)
- Point Mugu (NTD)
- Ponca City (PNC)
- Pontiac (PTK)
- Port Angeles (CLM)
- Port Clarence (KPC)
- Port Heiden (PTH)
- Portland (HIO)
- Portland (TTD)
- Poughkeepsie (POU)
- Quantico (NYG)
- Quincy (UIN)
- Rapid City (RCA)
- Rawlins (RWL)
- Reading (RDG)
- Red Bluff (RBL)
- Redstone Arsnl Huntsville (HUA)
- Redwood Falls (RWF)
- Rifle (RIL)
- Riverside (RAL)
- Riverside (RIV)
- Rocky Mount (RWI)
- Rome (RME)
- Rome (RMG)
- Russell (RSL)
- Sacramento (MCC)
- Sacramento (MHR)
- Sacramento (SAC)
- Saint Paul (STP)
- Salem (SLE)
- Salinas (SNS)
- Salmon (SMN)
- San Antonio (SKF)
- San Antonio (SSF)
- San Carlos (SQL)
- San Diego (NKX)
- San Diego (NZY)
- San Diego (SDM)
- Santa Monica (SMO)
- Savannah (SVN)
- Schenectady (SCH)
- Seward (SWD)
- Shemya (SYA)
- Sidney (SNY)
- Silver City (SVC)
- Smyrna (MQY)
- Soldotna (SXQ)
- Somerset (SME)
- South Lake Tahoe (TVL)
- Sparrevohn (SVW)
- Spokane (SFF)
- Spokane (SKA)
- Springfield (SGH)
- St Augustine (UST)
- St Joseph (STJ)
- St Louis (SUS)
- St Simons Island (SSI)
- Sumter (SSC)
- Tacoma (TCM)
- Tacoma (TIW)
- Takotna (TLJ)
- Talkeetna (TKA)
- Tampa (MCF)
- Taos (TSM)
- Temple (TPL)
- Terre Haute (HUF)
- Titusville (TIX)
- Tonopah (TPH)
- Topeka (FOE)
- Topeka (TOP)
- Troy (TOI)
- Truckee (TKF)
- Truth or Consequences (TCS)
- Tucson (DMA)
- Tucumcari (TCC)
- Tulsa (RVS)