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
2026-10-27T10:23:23+00:00
6565
10027
11348
9
Barrow, Alaska ·
📌 71.25849, -156.577447
2026-10-27T10:21:07+00:00
6646
1
San Francisco, California ·
📌 38.384587, -121.759647
2026-10-27T10:23:15+00:00
13276
17919
11
Albrook, Panama ·
📌 9.084681, -79.373969
2026-10-27T10:23:03+00:00
5589
4
Riverhead, New York ·
📌 40.881922, -72.63762
2026-10-27T10:23:08+00:00
6661
8912
13
Santa Cruz, Bolivia ·
📌 -17.671199, -63.157088
2026-10-27T10:16:14+00:00
11318
13315
3
Reykjavik, Iceland ·
📌 63.847168, -22.455754
2026-10-27T10:23:35+00:00
5720
11184
17
Canarias, Spain ·
📌 27.960945, -15.405608
2026-10-27T10:22:46+00:00
17928
21955
7
Shannon, Ireland ·
📌 52.744089, -8.926752
2026-10-27T10:23:10+00:00
8942
8
Johannesburg, South Africa ·
📌 -26.129658, 28.206078
2026-10-27T10:21:59+00:00
11321
21949
15
Al Muharraq, Bahrain ·
📌 26.268773, 50.648978
2026-10-27T10:22:46+00:00
17967
21982
14
Krasnoyarsk, Russia ·
📌 56.152603, 92.583337
2026-10-27T10:23:35+00:00
10087
6
Hat Yai, Thailand ·
📌 6.937536, 100.388451
2026-10-27T10:23:23+00:00
5655
13270
10
Muan, South Korea ·
📌 35.032377, 126.238644
2026-10-27T09:27:23+00:00
17958
21931
16
Agana, Guam ·
📌 13.488833, 144.828233
2026-10-27T10:17:38+00:00
11306
21928
5
Auckland, New Zealand ·
📌 -37.015757, 174.809637
2026-10-27T10:23:15+00:00
10084
13351
Source Data. Last update 2026-10-27T10:22:46+00:00.
For more information or to join our friends: Airframes.io.

[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 169
TL-KHIO1-HFDL 121
AB-EDDG-HFDL 108
KD-PANC-HFDL 57
LOT-TEST-HFDL 43
RG_EGHQ_HFDL_8-10 34
RG_EGDI_HFDL_11-15 27
ASJ 15
LOT-HFDL-PHNG 14
BC-EINN4 11
OH2MOK-EFHK-HFDL 10
K4JK-KCHO-HFDL 0
MP-EDQM01-HFDL 0
CO-CYTZ2-HFDL 0
HFDL 0
KC3ZYT-KIDI-HFDL 0
SS-EGBB-HFDL 0
AL-LFBP-HFDL 0
VA-HFDL-1 0
PLIW-HFDL-EGGD 0
RG_EGHQ_HFDL_17-21 0
MI-HFDL-1 0
JF-EGGD-HFDL 0
RG_EGDI_HFDL_5-6 0
RP-KLDJ-HFDL 0
CS-KABQ-HFDL 0
HQH-HFDL 0
CHANGEME-EDAV-HFDL 0
squitter 0
CN-ESNV-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)
AB-EDDG-HFDL 653
AU-YBBN-HFDL 186
RG_EGHQ_HFDL_17-21 84
TL-KHIO1-HFDL 50
ASJ 46
RG_EGHQ_HFDL_8-10 34
BC-EINN4 20
RG_EGDI_HFDL_11-15 18
KD-PANC-HFDL 14
AL-LFBP-HFDL 5
OH2MOK-EFHK-HFDL 5
CO-CYTZ2-HFDL 3
RG_EGDI_HFDL_5-6 2
SS-EGBB-HFDL 0
K4JK-KCHO-HFDL 0
MP-EDQM01-HFDL 0
PLIW-HFDL-EGGD 0
HFDL 0
JF-EGGD-HFDL 0
LOT-HFDL-PHNG 0
KC3ZYT-KIDI-HFDL 0
CS-KABQ-HFDL 0
VA-HFDL-1 0
RP-KLDJ-HFDL 0
MI-HFDL-1 0
HQH-HFDL 0
CHANGEME-EDAV-HFDL 0
performance 0
CN-ESNV-HFDL 0
LOT-TEST-HFDL 0
HW-MEL-HFDL 0