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
2025-09-06T01:54:15+00:00
11312
13324
21937
9
Barrow, Alaska
📌 71.25849, -156.577447
2025-09-06T01:53:55+00:00
10093
1
San Francisco, California
📌 38.384587, -121.759647
2025-09-06T01:53:55+00:00
13276
21934
11
Albrook, Panama
📌 9.084681, -79.373969
2025-09-06T01:54:15+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2025-09-06T01:54:10+00:00
8912
11387
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2025-09-06T01:48:47+00:00
13315
17916
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2025-09-06T01:54:25+00:00
5720
11184
17
Canarias, Spain
📌 27.960945, -15.405608
2025-09-06T01:53:56+00:00
11348
13303
7
Shannon, Ireland
📌 52.744089, -8.926752
2025-09-06T01:44:14+00:00
8942
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2025-09-06T01:53:43+00:00
4681
8834
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2025-09-06T01:48:50+00:00
10030
13312
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2025-09-06T01:53:58+00:00
8886
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2025-09-06T01:53:11+00:00
13270
21949
10
Muan, South Korea
📌 35.032377, 126.238644
2025-09-06T01:54:15+00:00
17958
21931
16
Agana, Guam
📌 13.488833, 144.828233
2025-09-06T01:54:25+00:00
8927
17919
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2025-09-06T01:53:24+00:00
10084
13351
Source Data. Last update 2025-09-06T01:53:56+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)
HFDL 223
KD-PANC-HFDL 177
AL-LFBP-HFDL 120
AU-YBBN-HFDL 91
LOT-HFDL-PHNG 89
MP-EDQM01-HFDL 51
CO-CYTZ2-HFDL 46
TL-KHIO1-HFDL 32
RG_EGHQ_HFDL_1_8-10 27
RG_EGHQ_HFDL_2_5-6 22
BC-EINN4 13
RG_EGHQ_HFDL_4_11-15 8
RP-KLDJ-HFDL 2
KC3ZYT-KIDI-HFDL 2
RG_EGHQ_HFDL_3_17-21 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 0
CS-KABQ-HFDL 0
squitter 0
DND_KHIO_HFDL 0
DND-KDIO-REDHFDL 0
AU-YBBN-HFDL24 0
DND_KHIO_REDHFDL 0
DND-KHIO-HFDL888 0
MP-EDQM01-HFDL1 0
GHV-LOIH-HFDL 0
KC3ZYT-HFDL-KIDI 0
hfdlobserver 0
KIDI-HFDL-KC3ZYT 0
CN-ESUT-HFDL 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)
HFDL 430
MP-EDQM01-HFDL 206
RG_EGHQ_HFDL_1_8-10 181
TL-KHIO1-HFDL 116
RG_EGHQ_HFDL_4_11-15 77
KD-PANC-HFDL 69
CO-CYTZ2-HFDL 43
RP-KLDJ-HFDL 42
AL-LFBP-HFDL 41
BC-EINN4 22
AU-YBBN-HFDL 18
RG_EGHQ_HFDL_2_5-6 16
KC3ZYT-KIDI-HFDL 4
LOT-HFDL-PHNG 0
RG_EGHQ_HFDL_3_17-21 0
*CO-CYTZ2-HFDL 0
CO-CYTZ-HFDL 0
*AU-YBBN-HFDL 0
performance 0
CS-KABQ-HFDL 0
DND_KHIO_HFDL 0
DND-KDIO-REDHFDL 0
AU-YBBN-HFDL24 0
DND_KHIO_REDHFDL 0
DND-KHIO-HFDL888 0
MP-EDQM01-HFDL1 0
GHV-LOIH-HFDL 0
KC3ZYT-HFDL-KIDI 0
hfdlobserver 0
KIDI-HFDL-KC3ZYT 0
CN-ESUT-HFDL 0