Ham Radio Spots & Email Alerts:
Know When the Bands Are Open

A ham radio spot is how operators find each other on the bands in real time. Someone posts a callsign, a frequency, and a mode — and within seconds, hundreds of operators know there is activity worth working. SpottedHam builds on that foundation with one key addition: custom email alerts that fire the moment a spot matches your criteria. No app. No constant page refreshing. Just an email when something you care about hits the air.

What Is a Ham Radio Spot?

A ham radio spot — sometimes called a "ham spot," is a short report shared across a network of amateur radio operators. At minimum it contains four pieces of information: the callsign of the station being spotted, the frequency they are on, the time of the spot, and who submitted it. Most spots also include the mode (CW, SSB, FT8, and so on) and a short comment like "strong signal" or "park activated."

Spots originated in the DX community in the 1980s as a way for operators to alert each other when a rare or distant station was audible on a given frequency. Before spotting networks, hunters relied on word of mouth, scheduled nets, or luck. The first digital clusters were text-based Telnet nodes where you would dial in, watch the scroll, and copy down frequencies by hand.

Today, spotting networks are instant, global, and branching across different programs. There are dedicated spot feeds for DX, for Parks on the Air (POTA), for Summits on the Air (SOTA), and for digital modes via aggregators like PSK Reporter. SpottedHam draws from these networks and presents them in a single filtered view sending an email when something you care about appears.

How Ham Radio Spotting Works

Modern amateur radio spotting runs on four parallel networks, each with a different source and purpose.

DX Clusters are human-submitted. An operator hears a rare callsign on 14.025 MHz, logs into a cluster node or web interface, and posts the spot. It propagates to interconnected nodes worldwide within seconds. Classic cluster aggregators include DX Watch and QRZ's DX cluster view.

The Reverse Beacon Network (RBN) is automated. A distributed network of software-defined receivers around the world continuously monitors the bands for CW and digital signals. When a station sends their callsign in CW or runs FT8, the RBN decodes it and auto-generates a spot without any human involvement. This means a station can be spotted the moment they begin operating, even if no human has heard them yet.

Program networks — POTA, SOTA, and WWFF — operate their own spotting infrastructure. POTA spots come from hunters who hear an activator, from activators self-spotting, or from the POTA app. SOTA uses SOTAwatch. These program spots carry extra context like the park reference number or summit designator — information the general DX cluster does not carry.

PSK Reporter aggregates digital-mode activity automatically from thousands of receiving stations running WSJT-X and similar software. It is the best source for FT8 and FT4 propagation data. If a signal is being decoded anywhere in the world, PSK Reporter knows within minutes.

SpottedHam surfaces spots from these networks and layers email alerting on top, so you get notified when the right activity appears rather than watching a screen and waiting.

Live Spots vs. Email Alerts — Which Do You Need?

Most operators need both, but they serve different situations. A live spot feed is best when you are actively at the rig and scanning for activity — glance at the board, see what is fresh, and tune. Email alerts are best when you are away from the shack or focused on something else, and you only want to be interrupted when something specific happens.

One thing that separates SpottedHam from alert-only services: you can watch your filter run live in the browser before trusting it. Set up an alert, switch to the live view, and confirm that spots matching your criteria are appearing. Once you are confident the filter is right, let the email do the work. Alert-only services skip that verification step entirely — you have no way to know whether your filter is catching what you think it is.

Ham Radio Email Alerts

Email is an underserved delivery channel for ham radio alerts. Most alerting services are push-notification-first, which means you need an app installed, notifications enabled, and a compatible smartphone nearby. That works for some operators but it excludes anyone who prefers to keep things simple. It also supports those who wants to share an alert with a group without configuring multiple accounts.

SpottedHam's email alerts work without any software installation. Set a filter — a specific callsign, a park number, a band, a mode, or a combination — and SpottedHam emails you within seconds of a matching spot appearing. A few things you can trigger an alert on:

• Callsign — get alerted any time a specific operator hits the air, great for chasing a rare portable or a friend's activation
• POTA park reference — know the moment activity starts at a park on your target list
• Band + query — get notified when your preferred band shows qualifying activity like 20m US-TX
• Mode + query — filter for CW-only, digital modes, or SSB
• Combination filters — "CW on 40m" or "any POTA park on 20m SSB" — stack criteria to cut through noise

SpottedHam's email alerts are particularly well-suited for clubs because if your members subscribe for alerts for your club callsign, you now have a method to alert them all once activating. Example, club callsign being used on Field Day or POTA event.

POTA Spots and Activations

Parks on the Air (POTA) is the fastest-growing operating program in amateur radio, with thousands of activations taking place every week across more than 50,000 eligible parks worldwide. For hunters — operators trying to make contact with activators — timing is everything. Most POTA activations last under two hours, and a popular park can fill with a pileup that makes it hard to break through unless you arrive early.

POTA spots are generated when a hunter hears an activator and posts to the network, or when the activator self-spots directly. These spots include the park reference number (for example, K-0001 for an Acadia National Park unit) alongside the callsign, frequency, and mode. The advantage of watching POTA spots through SpottedHam is that you can set an email alert for a specific park or activator and be notified the moment they appear — even if you are not watching the screen.

Self-spotting has become standard practice in POTA. SpottedHam's sticky spot feature keeps self-spots pinned to the top of the board for one hour, so hunters find the activator immediately rather than having the spot scroll off the page in a busy session.

For a detailed POTA spotting guide, see our POTA Spots page.

Filter Spots by Band, Mode, or Park

The most common complaint about traditional DX clusters is noise. On a busy contest weekend, a cluster can scroll hundreds of spots per minute — the vast majority of which are irrelevant to you. Useful spots disappear in seconds.

SpottedHam's filter system cuts through that noise. Common filters operators use every day include 40m CW (ideal for weekend contesting and chasing portable operators), 20m FT8 (one of the highest-volume band and mode combinations), 17m SSB (a favorite band for POTA hunters who prefer phone contacts), and filtering by a specific park reference to track a single target activation.

These same filters power the email alert system — whatever you see in the live view is exactly what would trigger an alert. That is the key advantage of combining a live feed with alerting: you verify the filter is working before walking away from the screen.

For dedicated band and mode views, see our guides for DX Spots and SOTA Spots.

Track a Specific Callsign

One of the most common things operators search for on spotting sites is a specific callsign — to see if a particular operator is currently active, to track a portable station moving between parks, or to catch a rare DX callsign before conditions change.

On SpottedHam, you can enter any callsign into the filter and immediately see every recent spot for that operator. Set a callsign alert and you will receive an email the next time that callsign appears on the network — regardless of band or mode. This is especially useful for chasing a specific POTA activator you have missed before, following a friend's portable expedition, tracking a rare DX entity with a predictable callsign, or knowing when your club's portable station goes on the air.

QSO Parties and Special Event Stations

Beyond POTA and DX, spotting networks light up during QSO parties, ARRL contests, and special event activations. A well-placed alert for a state QSO party prefix or a commemorative callsign like W1AW can mean the difference between working a new multiplier and missing it entirely.

SpottedHam's filters apply equally to contest and special event traffic — set an alert for a specific prefix, a band-mode combination common in the contest, or even a designated comment, and you will be notified the moment activity appears. A dedicated contest and events calendar is coming to SpottedHam — in the meantime, combining the live feed with a targeted callsign alert is the most reliable approach.

Why Use SpottedHam?