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
2026-09-10T13:11:13+00:00
6565
8936
10027
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-09-10T13:11:05+00:00
6646
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-09-10T13:09:52+00:00
17919
21934
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-09-10T13:11:38+00:00
10063
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-09-10T13:11:50+00:00
8912
13276
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-09-10T13:11:38+00:00
17916
21997
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-09-10T13:11:45+00:00
11184
15025
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-09-10T13:09:52+00:00
13303
21955
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-09-10T12:55:33+00:00
10081
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-09-10T13:10:34+00:00
11321
21949
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-09-10T13:00:18+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-09-10T13:11:50+00:00
13321
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-09-10T13:10:56+00:00
5655
13270
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-09-10T13:11:05+00:00
10060
13342
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-09-10T13:11:45+00:00
5451
8927
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-09-10T13:11:38+00:00
10084
13351
Source Data. Last update 2026-09-10T13:09:52+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)
AU-YBBN-HFDL 92
CO-CYTZ2-HFDL 75
HQH-HFDL 68
LOT-HFDL-PHNG 61
MP-EDQM01-HFDL 41
KC3ZYT-KIDI-HFDL 30
TL-KHIO1-HFDL 30
RP-KLDJ-HFDL 20
AB-EDDG-HFDL 9
VA-HFDL-1 8
SS-EGBB-HFDL 6
BC-EINN4 5
ASJ 4
HFDL 2
KD-PANC-HFDL 1
CN-ESNV-HFDL 1
K4JK-KCHO-HFDL 0
AL-LFBP-HFDL 0
PLIW-HFDL-EGGD 0
RG_EGHQ_HFDL_17-21 0
MI-HFDL-1 0
JF-EGGD-HFDL 0
RG_EGHQ_HFDL_8-10 0
RG_EGDI_HFDL_11-15 0
RG_EGDI_HFDL_5-6 0
CS-KABQ-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)
HQH-HFDL 196
SS-EGBB-HFDL 175
MP-EDQM01-HFDL 169
AB-EDDG-HFDL 154
CN-ESNV-HFDL 35
LOT-HFDL-PHNG 29
TL-KHIO1-HFDL 17
HFDL 17
RG_EGHQ_HFDL_17-21 17
RP-KLDJ-HFDL 15
ASJ 14
KC3ZYT-KIDI-HFDL 12
RG_EGHQ_HFDL_8-10 10
CS-KABQ-HFDL 9
RG_EGDI_HFDL_11-15 8
BC-EINN4 6
AU-YBBN-HFDL 4
CO-CYTZ2-HFDL 3
VA-HFDL-1 3
KD-PANC-HFDL 1
K4JK-KCHO-HFDL 0
PLIW-HFDL-EGGD 0
JF-EGGD-HFDL 0
AL-LFBP-HFDL 0
MI-HFDL-1 0
RG_EGDI_HFDL_5-6 0
CHANGEME-EDAV-HFDL 0
performance 0