HF Time Broadcasts and Time Signal Stations List

This resource provides a list of HF Time Broadcasts and Time Signal Stations, compiled by William Hepburn, CIDX, and updated on 2026-05-23. It categorizes stations into "Standard Frequency & Time Signal Broadcast" and "Time Signal Broadcast." Standard Frequency & Time Signal Broadcasts are continuous, operate in SW band, and offer standard frequencies and time signals, often with voice announcements and potentially meteorological or scientific data. These include official time observatories only. Time Signal Broadcasts are also continuous and provide time signals, usually with voice announcements. The list details frequencies such as 2.5, 3.33, 4.996, 4.998, 5, 7.85, 9.996, 10, 11.44, 14.67, 14.996, 15, 15.006, 20, and 25 MHz. For each entry, it specifies ID time, call sign, coordinates, and notes on operating hours, languages (English, Chinese, Portuguese, Korean, Spanish, French), and decommissioning dates for some stations.