Everything you need on the air

Find your Maidenhead grid from your location, and get distance + bearing between any two grids.

Next passes of ISS, SO-50, RS-44 and more over your location, from live orbital data.

Repeaters near you — frequency, offset, tone, and mode. Open data from hearham.com.

The big upcoming contests — ARRL DX, CQ WW, WPX, Sweepstakes, Field Day — with dates & links.

The ham radio web, organized: manufacturers, retailers, journals, DX tools, software & more.

Dipole, vertical, and loop lengths for any frequency — plus coax cut length by velocity factor.

Ohm's law, dBm↔watts, SWR/return loss, LC resonance, decibels, wavelength, and resistor codes.

Type anything and hear it in CW at any speed, plus a full tap-to-listen chart.

Instantly see the DXCC country and continent for any callsign or prefix.

Warm up for your Technician, General, or Extra exam with practice questions.

Quick-reference frequency allocations for every amateur band, HF through UHF.

Q-codes, the NATO phonetic alphabet, RST reports, and common CW prosigns & abbreviations.

Every term explained in plain English — balun, SWR, QSL, DXpedition, NVIS, and more. Searchable A–Z.