HFGCS Activity
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Message log of the strategic High Frequency Global Communications System, operated by The United States Air Force. The stations of this radio network operate on the main frequencies of 4724, 8992, 11175, and 15016 kHz simultaneously.
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Audio
2026.05.12 0150z

From: Combatant
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

#bGX #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0210z

From: Optimist
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

01:28 Transmission breaking up
01:54 Transmission resuming

Background jammer noise

#bGX #Malfunction #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0220z

From: Combatant
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

Background jammer noise

#bGX #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0240z

From: Optimist
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

00:00 "All stations, all stations, this is Optimist, Optimist. Break. GX EWTK, stand by. GX EW..." part wasn't transmitted.
01:05 Jammer turning off

Background jammer noise

#bGX #Malfunction #Repeat
HFGCS Activity
๐Ÿ‘2โค1๐Ÿ”ฅ1
Audio
2026.05.12 0250z

From: Combatant
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

#bGX #Repeat
HFGCS Activity
โค2๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0310z

From: Optimist
30 characters

GX EWTK
"All stations, all stations, this is Optimist, Optimist. Break. GX EWTK, stand by. GX EWTK, stand by..."
00:31 Transmission breaking up

#bGX #Malfunction #Repeat
HFGCS Activity
โค2๐Ÿ‘2๐Ÿ”ฅ1
Audio
2026.05.12 0316z

From: Addressee?

Test count

#TC
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0320z

From: Combatant
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

#bGX #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0340z

From: Optimist
30 characters

GX EWTK
D5D53A2HEBVLVUJSLKSCTMBN

Background voices

#bGX #Repeat
HFGCS Activity
โค2๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0348z

From: Lockbox
30, 30 characters

00:00 GX BXYJ
TFYUNQZ2BFVXF6GHY2B4HPPR
02:27 Out

02:52 GX 6TCD
6NOEFUBDOX5GJHPEFYMLEUZA
05:09 Out

#bGX
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0401z

From: Lockbox
30, 30 characters

00:00 GX 6TCD
6NOEFUBDOX5GJHPEFYMLEUZA
02:04 More to follow, stand by

02:14 GX BXYJ
TFYUNQZ2BFVXF6GHY2B4HPPR
04:08 Out

04:42 Standing by for traffic
05:22 Out

#bGX #IT #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0430z

From: Lockbox
25, 45, 30, 30 characters

00:00 XZ JHM4
SI3A6CSTRXTDXA7VGLA
02:30 Out

03:22 XZ 76UT
ZKJ3PSAFXH2ESPRQE2GCM3HD2ESARQE226M3ASC
07:22 Out

07:58 GX 6TCD
6NOEFUBDOX5GJHPEFYMLEUZA
10:55 More to follow, stand by

11:03 GX BXYJ
TFYUNQZ2BFVXF6GHY2B4HPPR
13:41 Out

13:50 Standing by for traffic
14:15 Out

#bXZ #bGX #IT #Repeat
HFGCS Activity
โค3๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0503z

From: Lockbox
30, 30 characters

00:00 GX 6TCD
6NOEFUBDOX5GJHPEFYMLEUZA
02:27 More to follow, stand by

02:39 GX BXYJ
TFYUNQZ2BFVXF6GHY2B4HPPR
04:44 Out

05:09 Standing by for traffic
05:41 Out

02:33 Background voices

#bGX #IT #Repeat
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 0553z

From: Mainsail

Test count

#TC
HFGCS Activity
โค1๐Ÿ‘1๐Ÿค”1๐Ÿ‘Œ1
Audio
2026.05.12 0844z

From: [Unreadable]

Unknown aircraft calling Mainsail

HFGCS Activity
๐Ÿคทโ€โ™‚2๐Ÿ˜1๐Ÿคจ1๐Ÿ‘€1๐Ÿ˜จ1
Audio
2026.05.12 1033z

From: Lockbox

Test count

#TC
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 1241z

From: 51

"Yokota, this is 51. Aircraft check up. 4724."

Unknown aircraft calling Yokota Airbase

HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1
Audio
2026.05.12 1300z

From: Yokota

Test count

#TC
HFGCS Activity
โค1๐Ÿ‘1๐Ÿ”ฅ1