How Accurate Is IP Address Location in Gambling Apps?

KEY TAKEAWAYS

• An IP address can usually place a device in the right country, but research finds region and city accuracy is much weaker.

• Studies find IP location is less accurate on mobile networks than on fixed-line connections.

• Published state technical standards tell geolocation systems to disregard IP location for mobile connections and not to use it as the primary source for other connections.

• Apps therefore rely on more precise signals from the device, and use the IP address mainly as a trigger and a consistency check.

• A failed check is usually a signal problem, and the fixes are legitimate ones such as turning on location services.

CONTENTS

01What an IP Address Can and Cannot Tell an App

02How IP Geolocation Works

03Under the Hood: What the Research Finds

04Walkthrough: A Location Check on Two Connections

05Variations: Connection Type and How IP Data Is Used

06Myths and Limits

07Key Facts and What a Player Can Do

08Related Concepts and Next Step

What an IP Address Can and Cannot Tell an App

An IP address is the numeric label that identifies a device’s connection to the internet. Services can look the address up in a database that maps address ranges to places, and the result is often right about the country. For anything finer, such as which state or city a person is in, the answer is much less certain, which is the main reason gambling apps do not treat an IP address as proof of where a player is standing.

This matters to players in a practical way. A location check that fails near a state border or on a mobile connection is often a sign that the available signals were not precise enough, not a sign that anything is wrong with the player. Understanding what IP location can and cannot do explains why apps ask for other information, such as the phone’s own location services.

This article covers what research says about IP location accuracy, what published technical standards require of gambling geolocation systems, and how the pieces fit together. It stays at the level of how the technology works and describes only legitimate ways to resolve a failed check. No app, operator or geolocation provider is named.

How IP Geolocation Works

IP geolocation is a lookup. A database keeps a long list of address ranges and, for each, a guess at where those addresses are used. When an app or server sees an address, it finds the matching range and returns the stored location. The device is not asked anything, which is why researchers call this a client-independent method.

The alternative is client-dependent location, in which the device itself helps. A phone can estimate its position from GPS, nearby Wi-Fi networks and mobile network signals. A research paper on database accuracy describes client-dependent methods as typically accurate to within tens of meters, while client-independent IP lookups are typically accurate at city level at best.

The difference comes from where the information originates. An address range is assigned to an internet provider, which may use it across a wide area, and the database entry is an estimate rather than a measurement. A phone’s location services measure what is around the phone right now. The wider picture of the signals gambling apps combine is explained in how gambling apps check your location and why it fails.

Under the Hood: What the Research Finds

Several independent studies have measured how accurate IP location databases are. A 2017 evaluation of commercial databases in the journal Information Technology and Control found that most reached nearly 100% accuracy at the country level, with one database at around 80%. At the region level the best databases returned around half of estimates correctly, and at the city level the best returned about 30%. The best median error distance was 10 km, in a data set that included many small cities with a median population of 17,000.

An earlier ACM study, published in 2011, concluded that databases can claim country-level accuracy but certainly not city-level, and that entries with very fine granularity did not make accuracy better. A 2021 study that used GPS-located smartphone addresses found that databases are more accurate on fixed-line networks than on mobile networks, and that the median accuracy was better than 3 km in some contexts, although it called reliance on such databases in densely populated cities premature.

A 2026 preprint titled Lost in the Prefix, which has not yet been peer reviewed, tested four major providers against reference measurements and reported median errors of 179 to 207 km on mobile networks, compared with 3 to 16 km on fixed networks, and found that about 70% of mobile address prefixes span more than 100 km. Because it is a preprint, its figures are best read as supporting evidence rather than settled fact, but the direction agrees with the peer-reviewed work: mobile addresses are the hardest to place.

Regulators have written this into technical standards. Pennsylvania’s geolocation technical standards require the geolocation system to disregard IP location data for devices on mobile internet connections, to discount IP location data for all other connections so that it is not used as the primary source, and to use pinpoint-accurate location data sources instead. Colorado’s Industry Bulletin 3 likewise tells systems to disregard IP location data for devices using mobile internet connections.

Walkthrough: A Location Check on Two Connections

The following is a hypothetical, simplified example of a geolocation check in a generic app, here called App A, with invented figures. Actual systems differ by state and provider.

The player opens App A and tries to place a bet. The app asks its geolocation service to run a check.
The service gathers signals from the device. On a phone with location services on, it receives position data from GPS, Wi-Fi and mobile signals, along with an estimate of how accurate that position is.
The service looks at the IP address. The lookup returns a stored location for the address. For a phone on mobile data, the standards above tell the system to disregard this result.
The service compares the position with the state boundary. It overlays the position, and the accuracy radius around it, on a map of the permitted area.
The result is returned. If the whole accuracy radius is inside the boundary, the bet can go ahead. If the radius touches the boundary or crosses it, the check may fail even though the player is in fact inside the state.
The player takes a legitimate fix. Turning on precise location, connecting to Wi-Fi or moving away from the border can improve the signals, after which a new check can be run.

Variations: Connection Type and How IP Data Is Used

How useful an IP address is depends on the kind of connection. The table summarises what the research and standards above say; the figures are drawn from the studies cited and can differ between databases and countries.

Connection	What the research and standards say about IP location
Fixed-line (home or office)	More accurate than mobile; still not treated as a primary source by Pennsylvania’s standards
Mobile data	Least accurate in studies; standards in Pennsylvania and Colorado say to disregard IP location data
Country-level question	Databases are generally reliable, with most near 100% in one study
City-level question	Best databases about 30% correct in one study; best median error was 10 km

If IP data is weak on accuracy, it still has a role. Standards in Colorado and North Carolina describe it as a trigger: a location check must run when the IP address changes during a session. A change of address is a cue to check again, not a measurement of position. Re-checks also run on a timer. Pennsylvania’s standard sets re-checks at 20 minutes for static or mobile connections, shortened to 5 minutes within 1 mile of the state border, and for mobile connections it bases the interval on distance from the boundary using an assumed speed of 65 miles per hour.

Myths and Limits

Myth: an IP address shows exactly where a person is. It does not. Research finds good country-level accuracy but much weaker region and city accuracy, and database entries are estimates.

Myth: a failed check means the app suspects the player. Most failures are signal problems, such as location services being off or an accuracy radius that touches a border. They are usually fixed by improving the signals.

Myth: more accurate IP databases solve the problem. The 2021 study found that paid versions are often not significantly more accurate than free ones, and the underlying limit is how address ranges are used, not the vendor.

A real limit: the studies measure general IP databases, not any particular gambling geolocation service, and results vary by country, network and year. This article reports what the sources say as of 2026 and cannot say how accurate any specific app’s check is.

Key Facts and What a Player Can Do

Question	Short answer
Is IP location reliable by country?	Generally yes, in published studies
By city?	No; the best databases were about 30% correct in one study
Which connection is hardest to locate?	Mobile data
Do standards rely on IP location?	Pennsylvania and Colorado say to disregard it on mobile and, in Pennsylvania, not to use it as the primary source otherwise
What can a player do if a check fails?	Turn on precise location, connect to Wi-Fi, update the app, or contact support

A player whose check fails can take only legitimate steps: make sure the phone’s location services are on and set to precise, connect to a Wi-Fi network if one is available, update the app, move away from a state border and try again, or contact the operator’s support. Re-checking after improving the signal is expected, since standards require apps to run the check again before allowing a wager when the first one fails.

For the full set of signals behind a check, start with how gambling apps check your location and why it fails. The difference that a phone’s precise location setting makes is explained in precise vs approximate location in gambling apps. Age checks use a different kind of signal, covered in how facial age estimation works, and the account system that ties checks to a player is described in what a player account management system is. Together they show how a platform builds confidence from several imperfect signals instead of trusting any one.

Frequently Asked Questions

How accurate is IP address geolocation?

It depends on the question. Studies find IP databases are usually right about the country, much less so about the region, and least so about the city. One 2017 study found the best databases were correct for about 30% of city estimates, so IP alone is weak evidence of position.

Why don’t gambling apps rely on IP location alone?

Because it is imprecise, especially on mobile connections. Pennsylvania’s technical standards say to disregard IP location data on mobile internet and not to use it as the primary source for other connections. Apps use device signals such as GPS and Wi-Fi to confirm position.

Why does a location check fail inside the state?

A common cause is that the device’s location accuracy radius touches or crosses the state boundary, which standards tell systems to control. Weak signals, location services being off, or being near a border can also cause failures. Improving the signal and retrying often resolves it.

What does an IP address change do during a session?

In some states, a change of IP address triggers a new location check. Colorado’s bulletin and North Carolina’s rule both say a check should run when the address changes mid-session. It is a cue to re-check, not a measurement of where you are.

What can a player do if a location check keeps failing?

Turn on location services and set them to precise, connect to Wi-Fi if available, update the app and move away from the state border before retrying. If it still fails, contact the operator’s support. Workarounds are not a legitimate fix.