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
2026-03-13T01:33:59+00:00
10027
13324
21937
9
Barrow, Alaska
📌 71.25849, -156.577447
2026-03-13T01:32:55+00:00
10093
1
San Francisco, California
📌 38.384587, -121.759647
2026-03-13T01:33:40+00:00
13276
17919
11
Albrook, Panama
📌 9.084681, -79.373969
2026-03-13T01:33:27+00:00
10063
4
Riverhead, New York
📌 40.881922, -72.63762
2026-03-13T01:33:42+00:00
8912
11387
13
Santa Cruz, Bolivia
📌 -17.671199, -63.157088
2026-03-13T01:28:32+00:00
13315
17916
3
Reykjavik, Iceland
📌 63.847168, -22.455754
2026-03-13T01:33:37+00:00
5720
11184
17
Canarias, Spain
📌 27.960945, -15.405608
2026-03-13T01:33:30+00:00
11348
17928
7
Shannon, Ireland
📌 52.744089, -8.926752
2026-03-13T01:33:02+00:00
8942
10081
8
Johannesburg, South Africa
📌 -26.129658, 28.206078
2026-03-13T01:32:55+00:00
4681
11321
15
Al Muharraq, Bahrain
📌 26.268773, 50.648978
2026-03-13T00:44:50+00:00
10030
13312
14
Krasnoyarsk, Russia
📌 56.152603, 92.583337
2026-03-13T01:33:59+00:00
6596
6
Hat Yai, Thailand
📌 6.937536, 100.388451
2026-03-13T01:33:40+00:00
13270
21949
10
Muan, South Korea
📌 35.032377, 126.238644
2026-03-13T01:26:51+00:00
17958
21931
16
Agana, Guam
📌 13.488833, 144.828233
2026-03-13T01:33:17+00:00
8927
11306
21928
5
Auckland, New Zealand
📌 -37.015757, 174.809637
2026-03-13T01:33:39+00:00
10084
13351
Source Data. Last update 2026-03-13T01:33:30+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)
KD-PANC-HFDL 153
F1-KHOU-HFDL 139
MP-EDQM01-HFDL 94
CO-CYTZ2-HFDL 94
LOT-HFDL-PHNG 83
TL-KHIO1-HFDL 78
PLIW-HFDL-EGGD 73
AU-YBBN-HFDL 68
HFDL 48
CS-KABQ-HFDL 46
KC3ZYT-KIDI-HFDL 31
NES-ESUT-HFDL 22
BIPPEN-EDXA-HFDL 11
RH-KTKI-HFDL 7
DND-KHIO-HFDL888 6
RG_EGDI_HFDL_5-6 3
RG_EGDI_HFDL_11-15 1
AL-LFBP-HFDL 0
RP-KLDJ-HFDL 0
RG_EGHQ_HFDL_8-10 0
BC-EINN4 0
RG_EGHQ_HFDL_17-21 0
ASJ 0
VA-HFDL-1 0
XBR-KLQK-HFDL 0
squitter 0
MI-HFDL-1 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)
BIPPEN-EDXA-HFDL 140
TL-KHIO1-HFDL 122
CO-CYTZ2-HFDL 103
HFDL 81
MP-EDQM01-HFDL 68
F1-KHOU-HFDL 41
PLIW-HFDL-EGGD 37
KD-PANC-HFDL 37
KC3ZYT-KIDI-HFDL 31
RP-KLDJ-HFDL 31
CS-KABQ-HFDL 15
AU-YBBN-HFDL 13
AL-LFBP-HFDL 5
NES-ESUT-HFDL 4
RH-KTKI-HFDL 2
RG_EGDI_HFDL_5-6 1
VA-HFDL-1 1
RG_EGHQ_HFDL_8-10 1
ASJ 0
BC-EINN4 0
LOT-HFDL-PHNG 0
RG_EGDI_HFDL_11-15 0
DND-KHIO-HFDL888 0
RG_EGHQ_HFDL_17-21 0
performance 0
XBR-KLQK-HFDL 0
MI-HFDL-1 0