How to Test Which City Your Mobile Proxy IP Really Reads As

Most people test the location of a new mobile proxy the same way: paste the address into the first lookup site a search engine offers, read one city, and decide on the spot whether the purchase was good. That single glance tells you surprisingly little. A mobile address is located by databases, not by satellites, and those databases often disagree with each other and with the rack the modem sits in. This guide gives a short, repeatable way to test what your BetterProxies line reads as, explains the results you are likely to see, and covers what to do when the answer does not match the work you bought it for.

Know what a location test can show

A location lookup does not measure anything about your modem. It takes the public address and searches a table. The tables come from companies such as MaxMind with GeoIP2, IP2Location, ipinfo and DB-IP, and each one fills its rows from a mix of sources: block registrations filed by the carrier, routing announcements, geofeeds published in the RFC 8805 format, response times from probes in known cities, and signals reported back by apps and users.

Keep that in mind while testing. You are checking an estimate about an address, and you are checking it against more than one estimator.

Expect a metro, a state or a nearby hub

Mobile carriers do not let each tower talk to the internet directly. Traffic from your modem rides the carrier's network to a regional gateway and leaves there, behind carrier-grade NAT, on a public address that many ordinary phones use at the same time. The lookup tables locate that gateway pool, rather than the tower or our rack.

In practice a test result will name the metro, or only the state, or sometimes the carrier's hub in a neighbouring city. You will never get a trustworthy street or zip code, from us or from any other mobile provider, so do not treat a missing neighbourhood as a failed test.

A testing routine that takes a few minutes

Run these steps once after purchase, and again whenever location matters for a new job:

• Through the proxy, load the free IP checker found on our Tools page and note the city, state and carrier it shows
• Look the same address up on ipinfo.io
• Open browserleaks.com/ip, which shows several database answers on one screen
• Write down where most answers agree and ignore a lone outlier
• Rotate once and repeat, so you see whether new addresses keep the same label
• Check the browser itself: timezone, language and WebRTC should all match a US user

Reading a split result

Seeing two cities and a bare state across three services is normal. Vendors refresh their tables at different times and weigh the sources differently. Carriers also move address ranges between markets, and around smaller cities a carrier can pool more than one state together, so a rotation may now and then return an address the tables file under a neighbouring state.

Judge by the cluster, not by the most alarming line on the page. Ordinary subscribers on that carrier in that city get the same mixed readings and use every major app without any trouble.

An example from our own racks

Here is a result worth knowing before you test. At our Boston site, Verizon and AT&T modems sit in the same rack on the same towers. Verizon addresses from there test as Boston. AT&T addresses from there test as New York. AT&T concentrates a lot of traffic at a few big interchange points, and lookup tables tend to stamp its addresses with whichever large city hosts one.

That means a correct Boston line can still produce a New York result, depending only on the carrier. When you test, always note the carrier next to the city.

The browser checks people forget

A clean address test means little if the browser contradicts it. Sites can see your system timezone and language. If a page uses the HTML5 geolocation API, the position comes from your computer's or phone's own GPS or Wi-Fi, never from the proxy. WebRTC can expose your real network unless it is disabled or handled. A US mobile address with a browser on Tokyo time is a mismatch that sites notice.

GoLogin and Undetectable.io can set a profile's timezone and geolocation to match the proxy address automatically, which makes this part of the test pass every time.

When the result does not fit the job

Decide what you actually need: the exact metro, or just the right state or country. Many tasks only need the second. If your test shows that the line does not read the way the job requires, contact support before anything else. There is no charge to switch the line to a different city or carrier, the location move is self-service in your dashboard, and support can recommend the carrier at a site that tests the way you need.

Frequently asked