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
2026-04-27T19:03:35+00:00
10027
11348
13324
9
Barrow, Alaska
📌 71.25849, -156.577447
2026-04-27T19:04:39+00:00
6646
1
San Francisco, California
📌 38.384587, -121.759647
2026-04-27T19:05:46+00:00
21934
11
Albrook, Panama
📌 9.084681, -79.373969
2026-04-27T19:05:23+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2026-04-27T19:05:26+00:00
8912
13276
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2026-04-27T18:50:22+00:00
17916
21997
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2026-04-27T19:05:43+00:00
5720
11184
17
Canarias, Spain
📌 27.960945, -15.405608
2026-04-27T19:05:33+00:00
17928
21955
7
Shannon, Ireland
📌 52.744089, -8.926752
2026-04-27T19:05:19+00:00
8942
10081
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2026-04-27T19:05:33+00:00
4681
11321
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2026-04-27T19:05:26+00:00
10030
13312
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2026-04-27T19:05:43+00:00
6596
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2026-04-27T19:05:46+00:00
5655
13270
10
Muan, South Korea
📌 35.032377, 126.238644
2026-04-27T18:53:59+00:00
8939
10060
16
Agana, Guam
📌 13.488833, 144.828233
2026-04-27T19:05:26+00:00
8927
11306
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2026-04-27T19:05:23+00:00
6535
10084
Source Data. Last update 2026-04-27T19:05:33+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)
HQH-HFDL 198
AU-YBBN-HFDL 196
MP-EDQM01-HFDL 179
KC3ZYT-KIDI-HFDL 95
AL-LFBP-HFDL 68
F1-KHOU-HFDL 63
BIPPEN-EDXA-HFDL 54
KD-PANC-HFDL 52
NES-ESUT-HFDL 39
PLIW-HFDL-EGGD 36
LOT-HFDL-PHNG 20
ASJ 11
BC-EINN4 5
RG_EGDI_HFDL_11-15 5
HFDL 4
TL-KHIO1-HFDL 1
RG_EGHQ_HFDL_8-10 0
CS-KABQ-HFDL 0
CO-CYTZ2-HFDL 0
RG_EGHQ_HFDL_17-21 0
MI-HFDL-1 0
VA-HFDL-1 0
RH-KTKI-HFDL 0
RG_EGDI_HFDL_5-6 0
DND-KHIO-HFDL888 0
RP-KLDJ-HFDL 0
squitter 0
JOERG-HFDL 0
CutestRadar-CRML-HFDL 0
CHANGEME-CRML-HFDL 0
CUTE-CRML-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)
MP-EDQM01-HFDL 415
HQH-HFDL 222
TL-KHIO1-HFDL 168
PLIW-HFDL-EGGD 143
F1-KHOU-HFDL 96
KC3ZYT-KIDI-HFDL 69
AL-LFBP-HFDL 64
BIPPEN-EDXA-HFDL 62
NES-ESUT-HFDL 48
KD-PANC-HFDL 45
ASJ 45
RP-KLDJ-HFDL 20
LOT-HFDL-PHNG 13
HFDL 11
RG_EGHQ_HFDL_17-21 8
BC-EINN4 5
VA-HFDL-1 3
RG_EGDI_HFDL_5-6 2
AU-YBBN-HFDL 1
RG_EGDI_HFDL_11-15 1
CO-CYTZ2-HFDL 0
MI-HFDL-1 0
CS-KABQ-HFDL 0
RG_EGHQ_HFDL_8-10 0
RH-KTKI-HFDL 0
DND-KHIO-HFDL888 0
HW-MEL-HFDL 0
performance 0
JOERG-HFDL 0
CutestRadar-CRML-HFDL 0
CHANGEME-CRML-HFDL 0
CUTE-CRML-HFDL 0