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
2026-06-12T11:08:11+00:00
11312
13324
21937
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-06-12T11:08:26+00:00
11354
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-06-12T11:09:17+00:00
8927
13276
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-06-12T11:08:45+00:00
10063
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-06-12T10:56:54+00:00
8912
11387
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-06-12T11:04:36+00:00
11318
13315
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-06-12T11:07:07+00:00
8977
17985
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-06-12T11:09:17+00:00
17928
21955
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-06-12T11:09:03+00:00
8942
10081
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-06-12T11:07:59+00:00
8834
21949
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-06-12T11:09:17+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-06-12T11:09:17+00:00
13321
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-06-12T11:07:27+00:00
5655
13270
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-06-12T11:08:31+00:00
17958
21931
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-06-12T11:08:50+00:00
11306
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-06-12T11:08:50+00:00
6535
13351
Source Data. Last update 2026-06-12T11:09:17+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)
MP-EDQM01-HFDL 94
HQH-HFDL 81
BI-EDDG3-HFDL 81
TL-KHIO1-HFDL 80
LOT-HFDL-PHNG 44
K4JK-KCHO-HFDL 41
PLIW-HFDL-EGGD 10
AL-LFBP-HFDL 7
KD-PANC-HFDL 4
RG_EGHQ_HFDL_17-21 4
HFDL 3
JF-EGGD-HFDL 2
KC3ZYT-KIDI-HFDL 0
CO-CYTZ2-HFDL 0
AU-YBBN-HFDL 0
ASJ 0
CS-KABQ-HFDL 0
RG_EGHQ_HFDL_8-10 0
VA-HFDL-1 0
RG_EGDI_HFDL_11-15 0
RP-KLDJ-HFDL 0
NES-ESUT-HFDL 0
RH-KTKI-HFDL 0
237376738 0
237376740 0
JK-KCHO-HFDL 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)
MP-EDQM01-HFDL 297
HQH-HFDL 262
BI-EDDG3-HFDL 193
K4JK-KCHO-HFDL 169
PLIW-HFDL-EGGD 94
LOT-HFDL-PHNG 26
CO-CYTZ2-HFDL 17
RG_EGHQ_HFDL_17-21 16
TL-KHIO1-HFDL 13
ASJ 13
RP-KLDJ-HFDL 12
AL-LFBP-HFDL 8
KD-PANC-HFDL 7
RG_EGHQ_HFDL_8-10 7
HFDL 7
JF-EGGD-HFDL 7
AU-YBBN-HFDL 4
KC3ZYT-KIDI-HFDL 2
VA-HFDL-1 2
CS-KABQ-HFDL 1
RG_EGDI_HFDL_11-15 0
NES-ESUT-HFDL 0
RG_EGDI_HFDL_5-6 0
HW-MEL-HFDL 0
RH-KTKI-HFDL 0
237376738 0
237376740 0
BC-EINN4 0
JK-KCHO-HFDL 0