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
2026-08-08T12:52:01+00:00
5514
11348
13324
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-08-08T12:51:44+00:00
10093
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-08-08T12:52:01+00:00
17919
21934
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-08-08T12:52:02+00:00
8894
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-08-08T12:50:42+00:00
11387
13276
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-08-08T12:52:02+00:00
11318
17916
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-08-08T12:51:44+00:00
8977
15025
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-08-08T12:51:29+00:00
17928
21955
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-08-08T12:50:13+00:00
10081
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-08-08T12:51:44+00:00
11321
21949
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-08-08T12:50:57+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-08-08T12:50:57+00:00
13321
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-08-08T12:50:58+00:00
5655
13270
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-08-08T12:52:02+00:00
13342
17958
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-08-08T12:51:29+00:00
8927
13312
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-08-08T12:50:27+00:00
6535
13351
Source Data. Last update 2026-08-08T12:51:29+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)
K4JK-KCHO-HFDL 286
MP-EDQM01-HFDL 50
TL-KHIO1-HFDL 44
KD-PANC-HFDL 39
AU-YBBN-HFDL 33
SS-EGBB-HFDL 30
LOT-HFDL-PHNG 29
AB-EDDG-HFDL 18
MI-HFDL-1 18
RG_EGDI_HFDL_11-15 18
ASJ 13
JF-EGGD-HFDL 9
HFDL 3
VA-HFDL-1 2
AL-LFBP-HFDL 1
CO-CYTZ2-HFDL 0
KC3ZYT-KIDI-HFDL 0
PLIW-HFDL-EGGD 0
RG_EGHQ_HFDL_17-21 0
RG_EGHQ_HFDL_8-10 0
RG_EGDI_HFDL_5-6 0
RP-KLDJ-HFDL 0
CS-KABQ-HFDL 0
BC-EINN4 0
HQH-HFDL 0
CHANGEME-EDAV-HFDL 0
squitter 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)
SS-EGBB-HFDL 358
MP-EDQM01-HFDL 358
K4JK-KCHO-HFDL 313
AB-EDDG-HFDL 194
KD-PANC-HFDL 41
CO-CYTZ2-HFDL 40
AL-LFBP-HFDL 39
TL-KHIO1-HFDL 37
LOT-HFDL-PHNG 35
RG_EGHQ_HFDL_8-10 24
ASJ 17
HFDL 17
RG_EGDI_HFDL_11-15 16
JF-EGGD-HFDL 11
KC3ZYT-KIDI-HFDL 8
MI-HFDL-1 8
VA-HFDL-1 5
CS-KABQ-HFDL 4
RG_EGHQ_HFDL_17-21 3
AU-YBBN-HFDL 1
PLIW-HFDL-EGGD 0
RP-KLDJ-HFDL 0
RG_EGDI_HFDL_5-6 0
BC-EINN4 0
HQH-HFDL 0
CHANGEME-EDAV-HFDL 0
performance 0