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
2025-05-31T10:46:19+00:00
10027
11348
13324
9
Barrow, Alaska
📌 71.25849, -156.577447
2025-05-31T10:55:15+00:00
8936
1
San Francisco, California
📌 38.384587, -121.759647
2025-05-31T10:55:48+00:00
6559
13276
11
Albrook, Panama
📌 9.084681, -79.373969
2025-05-31T10:55:48+00:00
8894
4
Riverhead, New York
📌 40.881922, -72.63762
2025-05-31T10:56:12+00:00
6661
8912
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2025-05-31T10:54:43+00:00
8957
11318
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2025-05-31T10:37:52+00:00
5720
8977
17
Canarias, Spain
📌 27.960945, -15.405608
2025-05-31T10:55:47+00:00
13303
17928
7
Shannon, Ireland
📌 52.744089, -8.926752
2025-05-31T10:55:42+00:00
8942
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2025-05-31T10:55:15+00:00
11321
21949
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2025-05-31T10:53:19+00:00
17967
21982
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2025-05-31T10:54:43+00:00
13321
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2025-05-31T10:56:12+00:00
5655
13270
10
Muan, South Korea
📌 35.032377, 126.238644
2025-05-31T10:55:48+00:00
17958
21931
16
Agana, Guam
📌 13.488833, 144.828233
2025-05-31T10:56:12+00:00
8927
17919
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2025-05-31T10:56:10+00:00
6535
10084
Source Data. Last update 2025-05-31T10:55:47+00:00.
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[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)
AU-YBBN-HFDL 149
KD-PANC-HFDL 117
RG_EGHQ_HFDL_1_8-10 94
CO-CYTZ2-HFDL 80
MP-EDQM01-HFDL 54
CS-KABQ-HFDL 24
LOT-HFDL-PHNG 23
AL-LFBP-HFDL 6
BC-EINN4 2
RG_EGHQ_HFDL_3_17-21 1
RG_EGHQ_HFDL_2_5-6 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 0
RG_EGHQ_HFDL_4_11-15 0
squitter 0
DND_KHIO_HFDL 0
RP-KLDJ-HFDL 0
DND-KDIO-REDHFDL 0
AU-YBBN-HFDL24 0
DND_KHIO_REDHFDL 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)
MP-EDQM01-HFDL 587
RG_EGHQ_HFDL_1_8-10 45
KD-PANC-HFDL 41
RG_EGHQ_HFDL_3_17-21 32
AU-YBBN-HFDL 18
CO-CYTZ2-HFDL 17
BC-EINN4 14
CS-KABQ-HFDL 10
RP-KLDJ-HFDL 9
RG_EGHQ_HFDL_4_11-15 8
LOT-HFDL-PHNG 6
AL-LFBP-HFDL 4
RG_EGHQ_HFDL_2_5-6 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 0
performance 0
DND_KHIO_HFDL 0
DND-KDIO-REDHFDL 0
AU-YBBN-HFDL24 0
DND_KHIO_REDHFDL 0