We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissible in your locale.

Subject / Started by Last post
7 Replies
24518 Views
Last post November 17, 2022, 2247 UTC
by East Troy Don
[Spooks] Cuban numbers stats

Started by Fansome

4 Replies
4712 Views
Last post June 21, 2017, 1638 UTC
by Strange Beacons
YL/SS

Started by sat_dxer

0 Replies
3153 Views
Last post August 20, 2012, 1332 UTC
by sat_dxer
yesterday's E07

Started by Ary-B

0 Replies
1398 Views
Last post March 30, 2017, 1442 UTC
by Ary-B
2 Replies
3631 Views
Last post December 20, 2012, 0456 UTC
by mr. mike
2 Replies
5589 Views
Last post March 16, 2014, 1704 UTC
by vhavrilko
XSL

Started by zackers

0 Replies
1391 Views
Last post January 28, 2021, 1539 UTC
by zackers
0 Replies
863 Views
Last post March 21, 2023, 0615 UTC
by MDK2
0 Replies
1138 Views
Last post July 23, 2022, 1256 UTC
by ~SIGINT~
0 Replies
1050 Views
Last post July 23, 2022, 1244 UTC
by ~SIGINT~
0 Replies
1330 Views
Last post July 23, 2022, 1258 UTC
by ~SIGINT~
3 Replies
2857 Views
Last post January 15, 2021, 0812 UTC
by tiNG
0 Replies
623 Views
Last post February 25, 2025, 1308 UTC
by Ct Yankee
0 Replies
952 Views
Last post April 02, 2016, 1743 UTC
by vhavrilko
XPA2, 30 OCT 2018

Started by MDK2

0 Replies
1197 Views
Last post October 30, 2018, 1542 UTC
by MDK2
XPA2, 24 MAR 2019

Started by MDK2

0 Replies
1627 Views
Last post March 24, 2019, 1552 UTC
by MDK2
0 Replies
987 Views
Last post October 19, 2018, 1444 UTC
by MDK2
2 Replies
2081 Views
Last post October 23, 2016, 0515 UTC
by Strange Beacons
0 Replies
1157 Views
Last post October 21, 2017, 1424 UTC
by MDK2
0 Replies
1434 Views
Last post November 04, 2017, 1445 UTC
by MDK2

 

Normal Topic
Hot Topic (More than 15 replies)
Very Hot Topic (More than 25 replies)

Locked Topic
Sticky Topic
Poll


HFUnderground T-Shirt
HFUnderground House Flag
by MitchellTimeDesigns