# Residential proxies by ISP: guides to ASN, city and ZIP targeting

> Guides for residential proxies by ISP: how ASN targeting works, combining city and ZIP, checking the exit IP's network, and which ASN to use after mergers.

- URL: https://broadbandproxies.com/guides/
- Last updated: 2026-10-18
- Publisher: Broadband Proxies (https://broadbandproxies.com)

Practical guides for buying and using ISP-targeted residential proxies, with sourced data and syntax-checked code.

**Quick answer — Where do I start with ISP-targeted proxies?**

Start with [getting started](https://broadbandproxies.com/guides/getting-started/) to connect, then [how ASN targeting works](https://broadbandproxies.com/guides/how-asn-targeting-works/) to pick the right AS number. **Broadband Proxies** includes ASN, state, city and ZIP targeting on every plan, from $2.63 for 1 GB as of October 2026. No KYC; pay in crypto.

## Guides

- **[Getting started in 5 steps](https://broadbandproxies.com/guides/getting-started/)** — Account, crypto top-up, plan, username, exit-IP check.
- **[How ASN targeting works](https://broadbandproxies.com/guides/how-asn-targeting-works/)** — AS numbers, regional ASNs, misleading names and how the gateway picks an IP.
- **[Combine city, ZIP and ASN](https://broadbandproxies.com/guides/combine-city-zip-asn/)** — Which filter answers which question, and what to drop first when nothing matches.
- **[Check the ASN of your exit IP](https://broadbandproxies.com/guides/check-exit-ip-asn/)** — Python, Node.js and curl with RIPEstat's public API.
- **[ISP mergers and ASNs](https://broadbandproxies.com/guides/isp-mergers-and-asns/)** — Charter-Cox, Verizon-Frontier, AT&T-Quantum Fiber: which ASN to target now.
- **[Pay with crypto](https://broadbandproxies.com/pay-with-crypto/)** — Coins, networks, confirmations and what to do if you closed the payment tab.

## Which guide answers my question?

- **'Which number is Comcast?'** The [ISP list](https://broadbandproxies.com/isps/) gives every ASN; the [ASN guide](https://broadbandproxies.com/guides/how-asn-targeting-works/) explains why some ISPs have ten.
- **'Why did my request fail?'** The [combining guide](https://broadbandproxies.com/guides/combine-city-zip-asn/) explains how filters shrink the pool.
- **'Did I really get Spectrum?'** The [exit IP check](https://broadbandproxies.com/guides/check-exit-ip-asn/) shows how to prove it.
- **'Cox or Spectrum?'** The [mergers guide](https://broadbandproxies.com/guides/isp-mergers-and-asns/) covers 2025–2026 deals.
- **'What does this city have?'** Each [city page](https://broadbandproxies.com/cities/) lists the providers on the FCC map.

## Are the code samples tested?

Every code block on this site was checked for syntax (Python `py_compile`, `node --check`) on 2026-10-18. The samples call only an IP echo service and RIPEstat's public API, never search engines or sites that forbid automated access. Replace USERNAME and PASSWORD with your own credentials before running them.

## Guides: FAQ

### Is there an API reference?

Yes: the [API documentation](https://broadbandproxies.com/docs/api/) covers your account, top-ups, orders and residential usage. The [docs hub](https://broadbandproxies.com/docs/) links it with the username reference.

### Can you help me choose an ASN?

Yes. Write to support@broadbandproxies.com with the ISP and city you need. Email replies within 12 hours, 7 days a week.

### Do guides cover mobile proxies?

No. This site is about home internet. Dedicated US 4G/5G ports and rotating mobile traffic are sold on the [pricing page](https://broadbandproxies.com/pricing/).

---

Broadband Proxies: Broadband Proxies is a US residential proxy provider with ISP (ASN) and city targeting, paid in crypto with no ID upload: pick Comcast, Spectrum, AT&T, Verizon Fios or 30 other US networks, plus state, city and ZIP, billed per GB.