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
2026-06-13T05:15:12+00:00
11312
13324
21937
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-06-13T05:14:38+00:00
11354
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-06-13T05:15:10+00:00
8927
17919
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-06-13T05:15:10+00:00
10063
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-06-13T05:15:14+00:00
8912
11387
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-06-13T05:15:18+00:00
11318
13315
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-06-13T05:15:17+00:00
8977
15025
17985
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-06-13T05:14:50+00:00
11348
13303
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-06-13T05:15:17+00:00
8942
10081
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-06-13T05:14:59+00:00
4681
11321
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-06-13T05:15:18+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-06-13T05:15:18+00:00
13321
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-06-13T04:31:52+00:00
13270
21949
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-06-13T05:15:10+00:00
17958
21931
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-06-13T05:14:18+00:00
5451
11306
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-06-13T05:14:59+00:00
13351
Source Data. Last update 2026-06-13T05:14:50+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 305
CO-CYTZ2-HFDL 122
AU-YBBN-HFDL 98
MP-EDQM01-HFDL 77
AL-LFBP-HFDL 61
KD-PANC-HFDL 51
RG_EGHQ_HFDL_8-10 49
HQH-HFDL 44
PLIW-HFDL-EGGD 40
CS-KABQ-HFDL 37
LOT-HFDL-PHNG 36
TL-KHIO1-HFDL 31
HFDL 24
KC3ZYT-KIDI-HFDL 15
ASJ 13
RG_EGDI_HFDL_11-15 9
RP-KLDJ-HFDL 6
JF-EGGD-HFDL 4
VA-HFDL-1 0
NES-ESUT-HFDL 0
RG_EGHQ_HFDL_17-21 0
RH-KTKI-HFDL 0
237376738 0
237376740 0
BI-EDDG3-HFDL 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)
K4JK-KCHO-HFDL 519
MP-EDQM01-HFDL 405
HQH-HFDL 232
CO-CYTZ2-HFDL 168
PLIW-HFDL-EGGD 150
RP-KLDJ-HFDL 51
TL-KHIO1-HFDL 38
RG_EGHQ_HFDL_8-10 35
KC3ZYT-KIDI-HFDL 34
HFDL 32
AL-LFBP-HFDL 24
ASJ 23
KD-PANC-HFDL 18
RG_EGDI_HFDL_11-15 16
BI-EDDG3-HFDL 15
JF-EGGD-HFDL 13
AU-YBBN-HFDL 13
CS-KABQ-HFDL 4
LOT-HFDL-PHNG 2
NES-ESUT-HFDL 0
VA-HFDL-1 0
RG_EGDI_HFDL_5-6 0
RG_EGHQ_HFDL_17-21 0
HW-MEL-HFDL 0
RH-KTKI-HFDL 0
237376738 0
237376740 0
BC-EINN4 0
JK-KCHO-HFDL 0