Quick answer
Can I combine city, ZIP and ASN targeting on a proxy?
Yes. A Broadband Proxies username can carry state, city, ZIP and ASN at once, for example USERNAME-country-us-state-il-city-chicago-zip-60614-asn-7922 for Comcast in Lincoln Park, Chicago. Every filter shrinks the pool, so use only the ones your check needs and drop the ZIP first when nothing matches. All filters are included from $2.63 for 1 GB; no KYC.
Which filter do I need?
| Your question | Filters to use | Example |
|---|---|---|
| What does a US visitor see? | Country | USERNAME-country-us |
| What do Texans see? | State | USERNAME-country-us-state-tx |
| What does a Houston household see? | State + city | USERNAME-country-us-state-tx-city-houston |
| What does a Comcast customer see? | ASN | USERNAME-country-us-asn-7922 |
| What does a Comcast household in Houston see? | State + city + ASN | USERNAME-country-us-state-tx-city-houston-asn-7922 |
| What does a home in one neighborhood see? | ZIP (state and city optional) | USERNAME-country-us-zip-77006 |
| Same IP for a multi-step check? | Any of the above + session | ...-session-a1-ttl-20 |
Why does each filter reduce the pool so much?
Filters multiply. Suppose an ISP covers about half of a city's homes and a ZIP code holds a few percent of the city: the homes that match both are a small slice of a slice. At a quiet hour, that slice can be empty. City availability varies; the checkout shows what is online.
The FCC data on our city pages helps you guess where combinations hold up. Comcast reports service to 98.5% of Chicago's residential units, so city-chicago-asn-7922 has the whole city to draw from. Google LLC (Google Fiber and Webpass) reports 0.8% there, so city-chicago-asn-16591 will often find nothing.
What should I drop first when a request fails?
Keep the filter that defines your question and drop the others in this order:
- ZIP — the narrowest filter. Keep the city.
- City — keep the state and ASN; nearby suburbs often behave the same.
- State — keep the ASN if the network is what matters.
- ASN — only if the place matters more than the network.
Log which filters actually served each result, so your report says 'Comcast, Houston' and not 'Comcast, ZIP 77006' when the ZIP was dropped.
How precise is city and ZIP targeting?
City and ZIP targeting rely on where IP geolocation places a home device. Databases disagree near city lines and update at different times, so a request for one ZIP can return an IP that one database places in the next ZIP. For borough or neighborhood checks, also set the location on the site you test when it offers a postcode or address field, and record both.
Do sessions work with combined filters?
Yes. Add -session-<id>-ttl-<minutes> after the other segments. The gateway then keeps the same home IP, and therefore the same city, ZIP and ASN, for up to 30 minutes (the IP can change earlier, for example if the home device goes offline). Use a new session ID for each independent check, and expect an occasional early change when a home device goes offline.
Combining filters: FAQ
Does each filter cost extra?
No. State, city, ZIP and ASN are all included on every plan, from $2.63 for 1 GB to $0.50/GB on 1 TB, as of October 2026. You pay for traffic only.
Do I need the state when I give a city?
Add it. Several US cities share a name (Portland in Oregon and Maine, Columbus in Ohio and Georgia), and the state removes the doubt: state-or-city-portland.
Is ZIP targeting available outside the US?
No. Country and city targeting on every plan; in the United States also state and ZIP code; ASN targeting at no extra cost. City availability varies.
How do I write a city with two words?
In lower case with an underscore: city-new_york, city-san_antonio, city-oklahoma_city. For St. Louis, use city-st_louis.