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
2026-07-15T04:12:43+00:00
11312
13324
21937
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-07-15T04:12:43+00:00
10093
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-07-15T04:10:38+00:00
17919
21934
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-07-15T04:12:27+00:00
10063
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-07-15T04:11:02+00:00
8912
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-07-15T04:12:27+00:00
11318
13315
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-07-15T04:11:29+00:00
5720
15025
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-07-15T04:12:26+00:00
8948
11348
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-07-15T04:12:31+00:00
8942
10081
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-07-15T04:12:11+00:00
3016
4681
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-07-15T04:10:55+00:00
10030
13312
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-07-15T04:12:27+00:00
13321
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-07-15T04:12:26+00:00
13270
21949
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-07-15T04:12:43+00:00
17958
21931
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-07-15T04:10:55+00:00
8927
11306
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-07-15T04:12:13+00:00
10084
17916
Source Data. Last update 2026-07-15T04:12:26+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 504
AU-YBBN-HFDL 118
KD-PANC-HFDL 86
SS-EGBB-HFDL 32
AB-EDDG-HFDL 24
LOT-HFDL-PHNG 22
ASJ 17
AL-LFBP-HFDL 10
JF-EGGD-HFDL 6
TL-KHIO1-HFDL 3
PLIW-HFDL-EGGD 2
RG_EGHQ_HFDL_8-10 1
CO-CYTZ2-HFDL 0
HFDL 0
KC3ZYT-KIDI-HFDL 0
MP-EDQM01-HFDL 0
VA-HFDL-1 0
RG_EGHQ_HFDL_17-21 0
MI-HFDL-1 0
RP-KLDJ-HFDL 0
CS-KABQ-HFDL 0
BC-EINN4 0
RG_EGDI_HFDL_11-15 0
RG_EGDI_HFDL_5-6 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 601
AB-EDDG-HFDL 82
SS-EGBB-HFDL 51
TL-KHIO1-HFDL 29
KC3ZYT-KIDI-HFDL 23
HFDL 9
JF-EGGD-HFDL 9
KD-PANC-HFDL 8
ASJ 8
CS-KABQ-HFDL 7
RP-KLDJ-HFDL 6
AL-LFBP-HFDL 5
CO-CYTZ2-HFDL 5
PLIW-HFDL-EGGD 4
RG_EGHQ_HFDL_8-10 4
RG_EGDI_HFDL_11-15 2
VA-HFDL-1 2
LOT-HFDL-PHNG 1
MI-HFDL-1 1
AU-YBBN-HFDL 1
MP-EDQM01-HFDL 0
BC-EINN4 0
RG_EGHQ_HFDL_17-21 0
RG_EGDI_HFDL_5-6 0