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
2026-07-28T12:47:23+00:00
8936
10027
11312
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-07-28T12:46:39+00:00
10093
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-07-28T12:46:44+00:00
13276
17919
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-07-28T12:47:11+00:00
6589
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-07-28T12:47:30+00:00
6661
11387
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-07-28T12:47:23+00:00
13315
17916
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-07-28T12:12:23+00:00
5720
11184
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-07-28T12:46:21+00:00
17928
21955
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-07-28T12:47:11+00:00
8942
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-07-28T12:46:39+00:00
13321
21949
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-07-28T12:47:30+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-07-28T12:47:30+00:00
10087
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-07-28T12:13:57+00:00
13270
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-07-28T12:44:23+00:00
10060
13342
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-07-28T12:47:30+00:00
8927
11306
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-07-28T12:47:15+00:00
5583
6535
Source Data. Last update 2026-07-28T12:46:21+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 235
KC3ZYT-KIDI-HFDL 128
TL-KHIO1-HFDL 107
LOT-HFDL-PHNG 106
AU-YBBN-HFDL 95
KD-PANC-HFDL 58
SS-EGBB-HFDL 48
HFDL 39
ASJ 23
RG_EGHQ_HFDL_8-10 20
AB-EDDG-HFDL 7
JF-EGGD-HFDL 4
MI-HFDL-1 1
CS-KABQ-HFDL 1
MP-EDQM01-HFDL 0
CO-CYTZ2-HFDL 0
AL-LFBP-HFDL 0
VA-HFDL-1 0
PLIW-HFDL-EGGD 0
RG_EGHQ_HFDL_17-21 0
RG_EGDI_HFDL_11-15 0
RG_EGDI_HFDL_5-6 0
RP-KLDJ-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)
K4JK-KCHO-HFDL 415
AB-EDDG-HFDL 251
KD-PANC-HFDL 88
SS-EGBB-HFDL 71
TL-KHIO1-HFDL 34
LOT-HFDL-PHNG 21
PLIW-HFDL-EGGD 19
KC3ZYT-KIDI-HFDL 13
CS-KABQ-HFDL 11
ASJ 10
AU-YBBN-HFDL 10
HFDL 9
JF-EGGD-HFDL 8
AL-LFBP-HFDL 4
CO-CYTZ2-HFDL 2
MI-HFDL-1 1
MP-EDQM01-HFDL 0
RG_EGHQ_HFDL_8-10 0
RG_EGHQ_HFDL_17-21 0
VA-HFDL-1 0
RP-KLDJ-HFDL 0
RG_EGDI_HFDL_11-15 0
RG_EGDI_HFDL_5-6 0
BC-EINN4 0
HQH-HFDL 0
CHANGEME-EDAV-HFDL 0
performance 0