Towered · Class D surface area

Southern Illinois (KMDH) radio calls

Carbondale/Murphysboro, ILICAO KMDH · FAA MDH

Southern Illinois is a towered airport in Carbondale/Murphysboro, IL. You will taxi with Ground on 121.8 and work Southern Tower on 125.35, after listening to the ATIS on 119.725. The tower operates 0700-2100 local.

The airport has a Class D surface area: two-way radio communication with the tower must be established before entering. Published hours: CLASS D SVC 0700-2100; OTHER TIMES CLASS G.

Frequencies

ATIS119.725
GroundSouthern Ground121.8
TowerSouthern Tower125.35
CTAF125.35
UNICOM122.95

Airport

Runways
06 · 24 · 18L · 36R · 18R · 36L
Elevation
411 ft
Tower hours
0700-2100 local
Position
37.778, -89.252

Towered airport with a Class D surface area

Sample calls at KMDH

Southern Illinois has a Class D surface area: establish two-way communication with the tower before entering (AIM 3-2-5 b 3). A reply that uses your call sign, even "standby", establishes it; "aircraft calling, standby" does not. The calls below use runway 06; the tower assigns the runway in use on the day.

The aircraft is the AIM’s own example, Cessna Three One Six Zero Foxtrot; the squawk codes, altitudes and headings are illustrative. Frequencies, station names and runway numbers are this airport’s, from the FAA data.

  1. Listen to the ATIS on 119.725 first and note the letter; "with Information (letter)" on your first call lets the controller skip the weather (JO 7110.65 3-10-1).
  2. YouSouthern Ground, Cessna Three One Six Zero Foxtrot, at the ramp with Information Alpha, request taxi, VFR departure to the north.
  3. ATCCessna Six Zero Foxtrot, Southern Ground, runway zero six, taxi via Alpha, hold short of runway zero six.
  4. YouRunway zero six, taxi via Alpha, hold short of runway zero six, Cessna Six Zero Foxtrot.
  5. The runway, any clearance onto a runway and every hold-short instruction are read back (AIM 4-3-18 a 9). Stay on Ground through the run-up and switch to Tower when ready (AIM 4-3-14 a).
  6. YouSouthern Tower, Cessna Six Zero Foxtrot, holding short runway zero six, ready for departure, northbound.
  7. ATCCessna Six Zero Foxtrot, Southern Tower, runway zero six, cleared for takeoff.
  8. YouRunway zero six, cleared for takeoff, Cessna Six Zero Foxtrot.
  9. Inbound: call the tower about 15 miles out, before the Class D boundary (AIM 4-3-2 a).
  10. YouSouthern Tower, Cessna Three One Six Zero Foxtrot, one five miles north, three thousand, with Information Bravo, landing Southern.
  11. ATCCessna Six Zero Foxtrot, Southern Tower, enter left downwind runway zero six, report midfield downwind.
  12. YouEnter left downwind runway zero six, report midfield, Cessna Six Zero Foxtrot.
  13. YouSouthern Tower, Cessna Six Zero Foxtrot, midfield left downwind, runway zero six.
  14. ATCCessna Six Zero Foxtrot, runway zero six, cleared to land, wind two seven zero at eight.
  15. YouRunway zero six, cleared to land, Cessna Six Zero Foxtrot.
  16. The wind is information: acknowledged, not read back. Exit at the first available taxiway or as told, taxi clear of the hold-short markings, and change to Ground only when the tower says (AIM 4-3-21).
  17. ATCCessna Six Zero Foxtrot, exit at the next taxiway, contact Southern Ground one two one point eight.
  18. YouExit next taxiway, one two one point eight, Cessna Six Zero Foxtrot.
  19. YouSouthern Ground, Cessna Six Zero Foxtrot, clear of runway zero six, taxi to the ramp.

If things change. The tower operates 0700-2100 local. Outside those hours the airport is a non-towered field: self-announce on the CTAF, 125.35 with the airport name first and last, and the surface area reverts to Class E or Class G as published in the Chart Supplement.

Phraseology from AIM 4-2-3; 4-3-18 a 9; 4-3-14; 4-3-21; 4-4-7 b; 4-1-18 a 3; 3-2-5 b 3; 4-3-2 a. What TowerTalk grades against →

The calls you will make here

Nearby in Illinois

Frequencies, runways and airspace from the FAA National Airspace System Resources (NASR) 28-day subscription, cycle effective Oct 29, 2026. Training use only. Always verify against a current Chart Supplement and sectional chart before flight; frequencies change. TowerTalk is not affiliated with the FAA. Report a discrepancy.