List of Host Friendly Codes:

any ships special ships ships with torpedoes ships with fighters starbases planets back

Friendly Codes: any ships

bdm	Host PHOST2 PHOST3	Any Ship	Registered	Ship will beam down all credits to planet if in orbit.
btm	Host PHOST2 PHOST3	Any Ship	Shareware	Transfer money to enemy ships.
cln	Host PHOST2 PHOST3	Any Ship	Registered	Clone Ship. Ship costs 2x MC, 1x Minerals (IE: Outrider Class Scout normally costs 50MC, 20Dur, 40Tri, 5 Moly. CLN'd, it would cost 100MC, 20Dur, 40Tri, 5 Moly. Non-Privateer, Crystals.
eeR	Host PHOST2 PHOST3	Any Ship	Shareware	Drop, or reject, alliance with race R.
ffR	Host PHOST2 PHOST3	Any Ship	Shareware	Offer, or accept, alliance with race R.
gsR	Host PHOST2 PHOST3	Any Ship	Registered	Give ship to Race R.

Friendly Codes: Starbases

dmp	Host PHOST2 PHOST3	Starbase	Registered	Recycle all components in storage.
PB#	Host PHOST2 PHOST3	Starbase	Registered	Build Priority Build Point Ships in order; PB1 Starbase will build before PB2 Starbase, etc.

Friendly Codes: Special Ships

###	Host PHOST2 PHOST3	Special Ship	Shareware	Firecloud Class Cruiser will 'Warp Chunnel' to Firecloud ID. ###, if both Fireclouds are stationary, using 50 KT of fuel.
ald	Host PHOST2 PHOST3	Special Ship	Registered	Alchemy ships only manufacture Duranium from Supplies.
alm	Host PHOST2 PHOST3	Special Ship	Registered	Alchemy ships only manufacture Molybdenum from Supplies.
alt	Host PHOST2 PHOST3	Special Ship	Registered	Alchemy ships only manufa

Friendly Codes: Ships with Torpedoes

btt	Host PHOST2 PHOST3	Torp Ship	Shareware	Transfer torpedoes to enemy ships with the same torp type.
md#	Host PHOST2 PHOST3	Torp Ship	Registered	Create and lay minefield, using (#)x10 torpedoes. (IE: md5 will drop 50 Torps worth into mines.)
mdh	Host PHOST2 PHOST3	Torp Ship	Registered	Create and lay minefield, using half of all torpedoes on board. (IE: if carrying 40 torpedoes, will drop 20 Torps worth into mines.)
mdq	Host PHOST2 PHOST3	Torp Ship	Registered	Create and lay minefield, using one-quarter of all torpedoes on board. (IE: if carrying 40 torpedoes, will drop 10 Torps worth into mines.)
miR	Host PHOST2 PHOST3	Torp Ship	Registered	Create and lay minefield, using all torpedoes on board, as Race R. (1-9;a,b; IE: mi5 will lay a Privateer minefield.)
mkt	Host PHOST2 PHOST3	Torp Ship	Registered	Build torpedoes in space with minerals and MCs on board ship. HOST/PHOST2 PHOST3 will create all torpedoes AFTER Mine-Laying stage.
msc	Host PHOST2 PHOST3	Torp Ship	Registered	Scoop up mines from your minefield and create torpedoes from them.
NTP	Host PHOST2 PHOST3	Torp Ship	Shareware	In combat, do not launch torpedoes.

Friendly Codes: Ships with Fighters

btf	Host PHOST2 PHOST3	Fighter Ship	Freeware	Transfer fighters to enemy ships with bays.
lfm	Host PHOST2 PHOST3	Fighter Ship	Freeware	Load minerals necessary for fighter building. Robot, Rebel, Colonial.
NTP	Host PHOST2 PHOST3	Fighter Ship	Freeware	In combat, do not launch fighters.

Friendly Codes: Planets

ATT	Host PHOST2 PHOST3	Planet	Shareware	Attack enemy (Non-Fascist/Rebel) ships in orbit.
bum	Host PHOST2 PHOST3	Planet	Shareware	Beam up money to ships in orbit (including enemy ships).
con	Host Many Add-Ons	Planet	Shareware	Send Configuration Data for Program. MANY add-ons have gotten in the habit of sending this information, if you place this particular FC on a planet- you may want to use this code, regardless of if the add-ons being used.
con	PHOST2 PHOST3	Planet	Shareware	Send the PConfig.Src file in the Util.Dat file next turn.
mfA	Host PHOST2 PHOST3	Planet	Shareware	A planet with a friendly code beginning with "mf" will cause ALL minefields belonging to your race to have this code as the mine field friendly code. The character 'A' can be any letter or number. In case there is a conflict (ie: multiple planets have the "mfA" code, then the HIGHEST Planet ID with this code will set a 'global' Mine code.
noc	Host	Planet	Shareware	Friendly code 'noc' disables Config message listing being sent as a message. Useful for WinPlan users. (Note that AHost seems to also use this code to send configuration messages, regardless of whether or not you've specifically asked for it with the CON Planetary code.)
NUK	Host PHOST2 PHOST3	Planet	Shareware	Attack enemy ships in orbit, even if they don't have fuel. All ships except Non-Fascist/Rebel, Non-Birds if SuperSpy.