A curated collection of ham radio resources on the web.
Live Tools
DX Summit
Real-time DX cluster spots worldwide
DX Watch
Live DX spots with filtering and alerts
Reverse Beacon Network
Automated CW/FT8/RTTY skimmer network
WebSDR
Listen to remote SDR receivers globally
KiwiSDR
Directory of 600+ online KiwiSDR receivers
DX Maps
Real-time VHF/UHF propagation map
HamClock Online
Beautiful web-based ham clock — greyline, DX spots, solar data in one view
OpenHamClock
Open-source ham dashboard — propagation, greyline, DRAP maps, runs on Pi
Databases & Lookups
QRZ.com
Callsign lookup, logbook, profile pages
HamQTH
Free callsign database and XML lookup API
FCC ULS
Official US license database search
Clublog
DXCC log matching and statistics
Logbook of The World
ARRL QSO confirmation service
eQSL
Electronic QSL card exchange service
RadioID
DMR ID registration — required for digital voice networks
RepeaterBook
Largest open repeater directory — search by location, band, mode
RadioReference
Scanner frequencies, trunking databases, public safety systems
BrandMeister
Worldwide DMR network — live dashboard, talkgroups, hotspot gateway
Propagation & Space Weather
NOAA Space Weather
Solar flux, K-index, geomagnetic forecasts
SolarHam
Solar activity dashboard for radio operators
VOACAP Online
HF propagation prediction with world maps
DR2W Propagation
Band condition charts updated every 5 minutes
DXHeat
Propagation conditions with live band activity
KC2G MUF Map
Real-time MUF map from ionosonde data
Digital Modes
PSK Reporter
Worldwide FT8/FT4/CW reception reports map
WSJT-X
FT8, FT4, JT65, WSPR weak-signal software
JS8Call
Keyboard-to-keyboard messaging over HF
fldigi
Multi-mode digital modem — PSK, RTTY, more
GridTracker
Visual FT8/FT4 companion map and logger
WSPR Rocks
WSPR beacon reception live map
SDR & Software
SDR++
Cross-platform SDR receiver, modern and fast
Gqrx
Open-source SDR receiver for Linux/Mac
SDRangel
Multi-device SDR with TX/RX and decoders
CubicSDR
Cross-platform waterfall SDR application
SigDigger
Signal analysis and reverse engineering tool
GNU Radio
Signal processing framework and flowgraph toolkit
SoapySDR
Hardware abstraction layer for SDR devices
Inspectrum
Offline signal analysis and waterfall viewer
Antenna Design
4NEC2
Free NEC-based antenna modeling and optimization
MMANA-GAL
Antenna analysis with 3D pattern visualization
66pacific Calculators
Dipole, vertical, ground plane quick calculators
Antenna-Theory.com
Antenna encyclopedia with theory and patterns
Contesting
WA7BNM Contest Calendar
Comprehensive contest schedule with rules links
N1MM Logger+
Premier free contest logging software
3830 Scores
Claimed contest scores and soapbox comments
CQ Contest
CQ WW, WPX, and other CQ contest info
ARRL Contests
ARRL-sponsored contest rules and results
Licensing & Exams
ARRL Licensing
Official exam info, class finder, license manuals
HamStudy.org
Best free exam practice — adaptive flashcards, find exam sessions nearby
QRZ License Renewals
Quick link to FCC license renewal — don't let yours lapse
Community & Learning
eHam.net
Equipment reviews, forums, articles
QRZ Forums
Active ham radio discussion community
r/amateurradio
Reddit ham radio community, 350K+ members
Ham Radio Crash Course
Practical projects and tutorials on YouTube
Ham Radio Workbench
Technical podcast — projects and experiments
ARRL
National association — QST, advocacy, licensing
Emergency Comms
ARES
Amateur Radio Emergency Service coordination
SKYWARN
NWS severe weather spotter training
Winlink
Global radio email for emergency comms
SHARES
Federal HF emergency interoperability
Hardware & Kits
SDRplay
RSPdx/RSP1B wideband SDR receivers
Airspy
High-dynamic-range SDR receivers
RTL-SDR Blog
RTL-SDR dongles, guides, and projects
DX Engineering
Transceivers, antennas, station accessories
Ham Radio Outlet
Major US ham radio equipment dealer
QRP Labs
QDX/QMX digital transceiver kits (5W)
Elecraft
KX2/KX3/K4 high-performance transceiver kits
Anytone
Popular DMR/analog handhelds — AT-D878/D578 series
Anytone Config Builder
Online codeplug builder — program talkgroups and zones without CPS software
Latest Finds
One Watt of POTA Tomfoolery at Clemmons Educational State Forest!
QRPer · 2026-04-28
Guide to Amateur Radio Amplifiers 2026: Part 2: Linear Power Amplifiers from OM Power
DX Engineering Blog · 2026-04-28
Ethiopia on Shortwave – Then and Now
SWLing Post · 2026-04-28
My experience getting licensed (Amateur and GMRS) and watching the "professionals" at work
r/HamRadio · 2026-04-28
p25-survey: sweep a band with your SDR, find P25 control channels, dump everything they tell you about the system
r/rtlsdr · 2026-04-27
8 channels of indoor Pluto+ passive radar detections mapped against ADSB-B flight paths
r/rtlsdr · 2026-04-23
Much faster FFT in RF Analyzer App
r/rtlsdr · 2026-04-26
Android SDR spectrum/waterfall app progress — wide sweeps, zoom, 3D waterfall, native libiio
r/rtlsdr · 2026-04-26
FM and LTE Filters Tests
r/rtlsdr · 2026-04-22
Permanent Erection
r/amateurradio · 2026-04-24
Life hack for my fellow satellite enthusiasts!
r/amateurradio · 2026-04-26
2nd week with Nooelec V5: DSDPlus, Cap+ full capture advice
r/rtlsdr · 2026-04-26
I built a lightweight Python spectrum analyzer for RTL-SDR — real-time, auto-detection, and sweep mode
r/rtlsdr · 2026-04-27
First POTA…if you’re on the fence just do it!
r/amateurradio · 2026-04-27
Old maritime VSAT still worth selling in 2026?
r/rtlsdr · 2026-04-28
A little tool to decode Morse code
r/amateurradio · 2026-04-24
The Prepper Delusion (New York Times)
r/amateurradio · 2026-04-27
I'm that guy now
r/amateurradio · 2026-04-21
God dammit!!!
r/amateurradio · 2026-04-24
Custom-built VHF Ammo Can Go Box
r/HamRadio · 2026-04-25
Why do unlicensed people buy ham handhelds instead of GMRS?
r/HamRadio · 2026-04-25
What would theoretically happen if you were to stand in front of this and it was pointed at you with 1500w pep?
r/amateurradio · 2026-04-25
Just passed the Technician exam! 📡
r/amateurradio · 2026-04-25
GPS base station 467.075 mhz
r/rtlsdr · 2026-04-25
What can possibly cause this?
r/rtlsdr · 2026-04-25
Nuevo ICOM X-026. ¿ Sustituto del IC-7100 ?
r/HamRadio · 2026-04-24
Just got back into radio and discovered that bouncing signals off comets (and the Moon) is a thing...
r/HamRadio · 2026-04-23
What's The Purpose When You're In A Dead Area
r/HamRadio · 2026-04-27
Finally completed my VX series collection. Only took a couple of years to find all of them in good condition and working.
r/HamRadio · 2026-04-26
Radio enthusiasts in Binghamton to transmit signals around the world using 113-year-old tower
r/HamRadio · 2026-04-22