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 ·
2026-07-15T04:12:43+00:00
11312
13324
21937
9
Barrow, Alaska ·
2026-07-15T04:12:43+00:00
10093
1
San Francisco, California ·
2026-07-15T04:10:38+00:00
17919
21934
11
Albrook, Panama ·
2026-07-15T04:12:27+00:00
10063
4
Riverhead, New York ·
2026-07-15T04:11:02+00:00
8912
13
Santa Cruz, Bolivia ·
2026-07-15T04:12:27+00:00
11318
13315
3
Reykjavik, Iceland ·
2026-07-15T04:11:29+00:00
5720
15025
17
Canarias, Spain ·
2026-07-15T04:12:26+00:00
8948
11348
7
Shannon, Ireland ·
2026-07-15T04:12:31+00:00
8942
10081
8
Johannesburg, South Africa ·
2026-07-15T04:12:11+00:00
3016
4681
15
Al Muharraq, Bahrain ·
2026-07-15T04:10:55+00:00
10030
13312
14
Krasnoyarsk, Russia ·
2026-07-15T04:12:27+00:00
13321
6
Hat Yai, Thailand ·
2026-07-15T04:12:26+00:00
13270
21949
10
Muan, South Korea ·
2026-07-15T04:12:43+00:00
17958
21931
16
Agana, Guam ·
2026-07-15T04:10:55+00:00
8927
11306
21928
5
Auckland, New Zealand ·
2026-07-15T04:12:13+00:00
10084
17916
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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