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
2025-10-22T14:48:10+00:00
6565
8936
10027
9
Barrow, Alaska
2025-10-22T14:50:05+00:00
6646
1
San Francisco, California
2025-10-22T14:49:55+00:00
5508
6559
11
Albrook, Panama
2025-10-22T14:49:55+00:00
10063
4
Riverhead, New York
2025-10-22T14:49:38+00:00
13276
21931
13
Santa Cruz, Bolivia
2025-10-22T14:49:55+00:00
17916
21997
3
Reykjavik, Iceland
2025-10-22T14:49:53+00:00
11184
15025
17
Canarias, Spain
2025-10-22T14:50:05+00:00
17928
21955
7
Shannon, Ireland
2025-10-22T14:49:51+00:00
8942
10081
8
Johannesburg, South Africa
2025-10-22T14:49:33+00:00
13321
21949
15
Al Muharraq, Bahrain
2025-10-22T14:49:46+00:00
17967
21982
14
Krasnoyarsk, Russia
2025-10-22T14:49:55+00:00
10087
6
Hat Yai, Thailand
2025-10-22T14:49:38+00:00
5655
13270
10
Muan, South Korea
2025-10-22T14:50:05+00:00
10060
17958
16
Agana, Guam
2025-10-22T14:46:26+00:00
8927
11306
21928
5
Auckland, New Zealand
2025-10-22T14:49:55+00:00
10084
13351
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)
MP-EDQM01-HFDL 376
AU-YBBN-HFDL 211
TL-KHIO1-HFDL 205
HFDL 146
RG_EGHQ_HFDL_1_8-10 144
PLIW 135
RG_EGHQ_HFDL_4_11-15 105
CO-CYTZ2-HFDL 95
KD-PANC-HFDL 69
AL-LFBP-HFDL 60
KC3ZYT-KIDI-HFDL 41
CN-ESUT-HFDL 31
RG_EGHQ_HFDL_3_17-21 25
BC-EINN4 11
DND-KHIO-HFDL888 4
RP-KLDJ-HFDL 0
LOT-HFDL-PHNG 0
RG_EGHQ_HFDL_2_5-6 0
squitter 0
JF-EGGD-HFDL 0
CS-KABQ-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 869
HFDL 482
CN-ESUT-HFDL 340
PLIW 309
RG_EGHQ_HFDL_3_17-21 198
TL-KHIO1-HFDL 76
RG_EGHQ_HFDL_1_8-10 65
RG_EGHQ_HFDL_4_11-15 62
KD-PANC-HFDL 39
AL-LFBP-HFDL 39
KC3ZYT-KIDI-HFDL 35
AU-YBBN-HFDL 35
CO-CYTZ2-HFDL 17
BC-EINN4 15
RP-KLDJ-HFDL 12
LOT-HFDL-PHNG 3
DND-KHIO-HFDL888 0
RG_EGHQ_HFDL_2_5-6 0
performance 0
JF-EGGD-HFDL 0
CS-KABQ-HFDL 0