hfdl.observer

high frequency data link

Ground Stations

Live status of HFDL ground stations and the frequencies they are currently listening and heard on. This can be used to help you tune your HFDL decoder at this exact moment. Frequencies in kHz.
IDNameUpdated
2
Molokai, Hawaii
📌 21.184428, -157.186846
2025-12-07T03:10:56+00:00
10027
13324
21937
9
Barrow, Alaska
📌 71.25849, -156.577447
2025-12-07T03:03:01+00:00
11354
1
San Francisco, California
📌 38.384587, -121.759647
2025-12-07T03:10:53+00:00
13276
17919
11
Albrook, Panama
📌 9.084681, -79.373969
2025-12-07T03:10:56+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2025-12-07T03:10:36+00:00
6661
8912
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2025-12-07T02:43:19+00:00
11318
17916
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2025-12-07T03:10:41+00:00
5720
11184
17
Canarias, Spain
📌 27.960945, -15.405608
2025-12-07T03:10:53+00:00
8948
17928
7
Shannon, Ireland
📌 52.744089, -8.926752
2025-12-07T03:10:19+00:00
8942
10081
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2025-12-07T03:10:51+00:00
4681
11321
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2025-12-07T03:10:53+00:00
8885
13312
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2025-12-07T03:10:21+00:00
10087
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2025-12-07T03:10:53+00:00
13270
21949
10
Muan, South Korea
📌 35.032377, 126.238644
2025-12-07T03:04:07+00:00
17958
21931
16
Agana, Guam
📌 13.488833, 144.828233
2025-12-07T03:10:53+00:00
8927
11306
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2025-12-07T03:08:03+00:00
10084
13351
Source Data. Last update 2025-12-07T03:10:53+00:00.
For more information or to join our friends: Airframes.io.

[SPDU] Squitter Count

"Squitters" are sent out every 32 seconds by Ground Stations and provide regular, progressive updates of the active frequency list you see here.
(last hour)
KD-PANC-HFDL 330
LOT-HFDL-PHNG 107
K4JK-KCHO-HFDL 58
AU-YBBN-HFDL 57
RG_EGHQ_HFDL_1_8-10 46
MP-EDQM01-HFDL 43
TL-KHIO1-HFDL 41
RG_EGHQ_HFDL_2_5-6 35
AL-LFBP-HFDL 19
PL-HFDL-EGFF 5
KC3ZYT-KIDI-HFDL 1
HFDL 0
RG_EGHQ_HFDL_4_11-15 0
RP-KLDJ-HFDL 0
CO-CYTZ2-HFDL 0
BC-EINN4 0
RG_EGHQ_HFDL_3_17-21 0
DND-KHIO-HFDL888 0
PLIW 0
CN-ESUT-HFDL 0
squitter 0
JF-EGGD-HFDL 0
CS-KABQ-HFDL 0
test 0
ASJ 0
VA-HFDL-1 0
PLIW-HFDL-EGGD 0
k4jk 0

[HFNPDU] Performance Data Count

Performance Report packets are sent by aircraft, and include frequencies that they have heard Ground Stations on recently. This data is used as a backstop in case station updates via squitters are unavailable.
(last hour)
K4JK-KCHO-HFDL 481
HFDL 201
MP-EDQM01-HFDL 199
CO-CYTZ2-HFDL 116
TL-KHIO1-HFDL 91
KD-PANC-HFDL 70
KC3ZYT-KIDI-HFDL 66
RG_EGHQ_HFDL_2_5-6 51
CN-ESUT-HFDL 36
AU-YBBN-HFDL 34
RG_EGHQ_HFDL_1_8-10 24
PL-HFDL-EGFF 17
AL-LFBP-HFDL 11
LOT-HFDL-PHNG 5
VA-HFDL-1 2
RP-KLDJ-HFDL 0
RG_EGHQ_HFDL_4_11-15 0
BC-EINN4 0
DND-KHIO-HFDL888 0
RG_EGHQ_HFDL_3_17-21 0
PLIW 0
performance 0
JF-EGGD-HFDL 0
CS-KABQ-HFDL 0
test 0
ASJ 0
MI-HFDL-1 0
PLIW-HFDL-EGGD 0
k4jk 0