Undecodeable NATO Digital Signals

Eventually while tuning the bands, you're likely to come across some RTTY like sounds that you will not be able to decode. These are often military in nature, running NATO-50 or 75 baud STANAG 4481 with lots of encryption. There's nothing in the normal realm that will decode these. Mike Chace-Ortiz put a list of frequencies and sites together using the new TDoA function recently added to Kiwi SDRs. This list is courtesy of the UDXF. 2021 updates are in italics

• 4005 is Davidsonville, MD (has been known to drift to 4007 khz)
• 4233 is Lualualei, HI
• 4905 is Dixon, CA
• 4985 is Davidsonville, MD
• 5340 is Isabela, PR
• 6383 is Sigonella, IT
• 6487 is Davidsonville, MD
• 6831 is Isabela, PR
• 7455 is Isabela, PR
• 7597 is Dixon, CA
• 7830 is Isabela, PR
• 8093 is Diego Garcia
• 8538 is Barrigada Guam
• 8547 is Diego Garcia
• 8676 is Lualualei, HI
• 8694 is Dixon, CA
• 9075 is Lualualei, HI
• 9112 is Lualualei, HI (seems to be occasional)
• 9830 is Davidsonville, MD
• 10153 is Isabela, PR
• 10430 is Dixon, CA
• 11222 is Davidsonville, MD
• 11688 is Isabela, PR
• 12015 is Davidsonville, MD
• 12120 is Isabela, PR
• 13229 is Isabela, PR (only active briefly in November)
• 13870 is Dixon, CA
• 14434.3 is Lualualei, HI
• 15959 is Davidsonville, MD
• 16047 is Lualualei, HI (seems to be occasional)
• 16055 is Totsuka, JPN
• 16123 is Isabela, PR
• 16268.5 is Dixon, CA
• 18370 is Barrigada, Guam (seems to be occasional)
• 18558 is Lualualei, HI (seems to be occasional)
• 22471 is Diego Garcia
• 22910 is Diego Garcia

Related Pages

• Kiwi SDRnetwork adds Time Difference of Arrival direction-finding functionality via SWLing.com
• How to Recognize KG-84 Encryption in a NATO-75 Transmission from MT Milcom

---

• Return to the HF Appendix
• Return to DXing Digital Utilities