What is ZIP code proxy targeting?

How does ZIP code proxy targeting work?

ZIP code proxy targeting works through the username: the gateway reads the zip- segment and picks a home IP that geolocates inside that postal code. If no exit IP matches at that moment, the gateway answers with an error page instead of a wrong location.

ZIP code proxy targeting picks an exit IP that geolocates inside one five-digit US postal code, the finest location filter FiftyStateProxy offers.

Geolocation is a database estimate, not a GPS fix. IP data companies map address blocks to places, and two databases can place one IP in neighbouring ZIP codes. The list of which US states you can target shows the local ISPs and sample ZIP codes for each state.

What are state, city and ASN targeting?

State, city and ASN targeting are the other filters in the same username. The first two narrow the place; the third picks the network.

What is state targeting?

State targeting returns an IP in one US state or in Washington, D.C., for example -state-oh for Ohio. It suits state-wide ad checks and state-level search results.

What is city targeting?

City targeting returns an IP in one city, written in lower case with underscores, such as -city-fort_worth. FiftyStateProxy publishes 30 city pages, among them Chicago residential proxies.

What is ASN targeting?

ASN targeting returns an IP from one network, named by its autonomous system number. -asn-7922 asks for Comcast, -asn-20115 for Charter Spectrum and -asn-22773 for Cox, per RIPEstat holder names. One ISP can run several ASNs: Charter also announces AS11426, AS11351 and AS12271, among others.

How do I write the username for each targeting level?

Each targeting level adds one segment after country-us; the gateway, the ports and the password stay the same. The full pattern is USERNAME-country-{cc}-state-{state}-city-{city}-zip-{zip}-asn-{asn}-session-{id}-ttl-{minutes}.

When is ZIP-level targeting worth it?

ZIP-level targeting is worth it when the page you check changes from one neighbourhood to the next. Three jobs depend on it:

• Local SEO: map results and local listings depend on where the searcher stands. A searcher in Lincoln Park (60614) and one in Hyde Park (60615) sit in different parts of Chicago, so their nearby results differ. See the best US proxies for local SEO.
• Store-level prices and stock: grocery, pharmacy and big-box sites pick the nearest store from the visitor's location. See which US proxies suit price monitoring.
• Delivery-zone and local-ad QA: check that a delivery promise or a geo-fenced ad shows inside its zone and not outside it.

State or city targeting is enough for state-wide campaigns, national search results and bulk public-data jobs.

Does ZIP or ASN targeting cost extra?

No: FiftyStateProxy includes state, city, ZIP and ASN targeting on all 7 residential plans, from 1 GB to 1 TB (1,000 GB). A ZIP-targeted gigabyte costs the same $0.75/GB as an untargeted one on the 10 GB plan, as of October 2026.

The market is split on this feature. According to FiftyStateProxy's price check of 29 October 2026, 10 of the 20 US proxy providers we checked mention ZIP code targeting. SOAX keeps ZIP and ASN targeting for its Scale and Enterprise plans, and DataImpulse offers them for a small extra fee. The page on how much ZIP-targeted US proxies cost lists every tier.

Why does my IP sometimes show a different ZIP code?

A lookup tool can show a different ZIP code because each IP database draws its own map of address blocks. First check that your segments agree with each other: a Texas state code with a Chicago ZIP code matches nothing. Next, query two or three IP lookup services, then load the target site itself. If a ZIP code keeps returning errors, move one level up to the city or the state.