# ASN targeting proxies: how ISP targeting works > ASN targeting proxies explained: what an AS number is, how to pick Comcast, Spectrum or AT&T home IPs, and why one ISP has several ASNs. From $0.50/GB. - URL: https://broadbandproxies.com/guides/how-asn-targeting-works/ - Last updated: 2026-10-18 - Publisher: Broadband Proxies (https://broadbandproxies.com) The network number behind every IP, how a proxy gateway uses it, and the traps: regional ASNs, mergers and misleading names. **Quick answer — How does ASN targeting work on a residential proxy?** Every ISP announces its IP ranges under an autonomous system number (ASN), such as AS7922 for Comcast. When you add `asn-7922` to a **Broadband Proxies** username, the gateway picks a home IP announced by that network, if one is online. It is included on every plan, from $2.63 for 1 GB (October 2026), with no KYC and crypto payment. ## ASN targeting in brief | Attribute | Value | | --- | --- | | What it selects | The network (autonomous system) that announces the home IP | | Username segment | `asn-`, without the 'AS' prefix: `asn-7922` | | Combinable with | State, city and ZIP in the US: `USERNAME-country-us-state-tx-city-houston-asn-7922` | | Where to find ASNs | Our [ISP pages](https://broadbandproxies.com/isps/), RIPEstat, Hurricane Electric's BGP Toolkit, PeeringDB | | Availability | ASN availability varies by network, city and time of day; the checkout shows what is online, and no IP count per ISP is published | | Cost | Included on every plan, $2.63 for 1 GB to $0.50/GB | ## What is an ASN, in plain terms? The internet is a network of networks. Each one that routes its own addresses, from Comcast to a city-owned fiber utility, gets an autonomous system number from a registry such as ARIN, and uses BGP to tell other networks which IP ranges (prefixes) it can reach. That announcement is public. Tools such as RIPEstat read it from route collectors around the world, so anyone can look up which ASN announces a given IP. For a home IP, the ASN is almost always the customer's internet provider. That is why ASN targeting is the practical way to say 'give me a Comcast home' or 'give me a Verizon Fios home'. ## Why does one ISP have several ASNs? Mostly because of acquisitions. When a cable company buys another, it often keeps the old network running under its old number for years. Charter's Spectrum is the clearest case: RIPEstat lists AS20115 for Charter, but also AS10796, AS11427, AS12271 and AS20001 for former Time Warner Cable regions and AS33363 for former Bright House Networks, each still announcing millions of addresses (checked 2026-10-18). Comcast holds AS7922 plus regional numbers such as AS7015 and AS7725. Telcos are usually simpler. AT&T's consumer network is AS7018, Verizon Fios is AS701 and Frontier is AS5650. Each [ISP page](https://broadbandproxies.com/isps/) lists the numbers we found and which one to try first. *Holders per RIPEstat, checked 2026-10-18* | ISP | ASNs to know | Why several | | --- | --- | --- | | [Spectrum](https://broadbandproxies.com/isps/spectrum/) | AS20115, AS10796, AS11427, AS12271, AS20001, AS33363 | Time Warner Cable and Bright House networks kept their numbers | | [Astound](https://broadbandproxies.com/isps/astound/) | AS6079 (RCN), AS11404 (Wave), AS7459 (Grande) | Roll-up of regional cable companies | | [Optimum](https://broadbandproxies.com/isps/optimum/) | AS6128 (Cablevision), AS19108 (Suddenlink) | Two former companies under one brand | | [Google Fiber](https://broadbandproxies.com/isps/google-fiber/) | AS16591, AS19165 (Webpass) | Separate building-wireless business | | [Verizon 5G Home](https://broadbandproxies.com/isps/verizon-5g-home/) | AS22394, AS6167 | Wireless network, separate from Fios (AS701) | ## Can I trust the name of an ASN? Not always. Registered names are old and rarely updated. AS701, which carries Verizon Fios homes, is named 'UUNET - Verizon Business'. Mediacom's residential ranges are announced by an ASN named 'MEDIACOM-ENTERPRISE-BUSINESS', while its 'MEDIACOM-RESIDENTIAL-CUST' ASN announced nothing on 2026-10-18. Ziply Fiber routes on an ASN registered as 'Wholesail networks'. Judge an ASN by what it announces and where, not by its label. ## How does the gateway pick an IP for my ASN? The pool is made of home devices whose owners opted in through partner networks ([sourcing](https://broadbandproxies.com/sourcing/)). For each request, the gateway looks for a device that matches every filter in your username: country, then state, city and ZIP if given, then ASN. If several match, you get one of them; in rotating mode, a new connection usually gets a different one. Each new connection gets an IP from the pool, usually a different one; to get a new IP on every request, send one request per connection (turn off keep-alive). If no device matches at that moment, the request can fail. Do not assume a result came from the network you asked for: log the exit IP and check its ASN, as in [check the ASN of your exit IP](https://broadbandproxies.com/guides/check-exit-ip-asn/). When requests fail, drop the narrowest filter (ZIP, then city) and retry. ## What happens after a merger? Ownership changes overnight; routing changes slowly. Cox joined Charter effective August 19, 2026, but Cox homes still route on AS22773. AT&T bought Quantum Fiber on February 2, 2026, yet many of those homes still sit on Lumen's AS209. Target the ASN that announces the IPs today, and recheck after big deals. The [mergers guide](https://broadbandproxies.com/guides/isp-mergers-and-asns/) covers every 2025–2026 deal that matters. ## Is a home IP on an ISP's ASN the same as an 'ISP proxy'? No. Sellers use 'ISP proxy' for static IPs that an ISP registered but that sit in a data center. Those IPs belong to the ISP's ASN too, but no household uses them. Residential proxies targeted by ASN are real home connections on that network. The difference matters when a site looks at more than the ASN. See [ISP proxies vs residential by ISP](https://broadbandproxies.com/compare/isp-proxies-vs-residential-by-isp/). ## ASN targeting: FAQ ### Is ASN targeting the same as ISP targeting? Nearly. Some sellers let you type an ISP name, others an AS number. An ASN is more precise because it matches routing data, and one ISP can have several. Broadband Proxies uses AS numbers: `asn-7922` for Comcast's main network. ### Can I target two ASNs at once? Not in one username. Send requests with different usernames, one per ASN, for example `asn-20115` and `asn-11427` for Spectrum in Texas, and compare the results. ### Does ASN targeting work outside the United States? Yes, ASN targeting is available at no extra cost in other countries too: 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. This site documents US networks only. ### Why did my lookup show a different ASN? Usually because the ISP announces related ranges under a parent or regional ASN, or because the lookup tool uses another data source. Check the holder name in RIPEstat. If it is a different company, rotate and tell support at support@broadbandproxies.com. ### Does ASN targeting slow requests down? It can, slightly: the gateway has fewer devices to choose from, and a home device may be farther from the target. We do not publish speed figures. Test with the 1 GB plan. ## Sources 1. [RIPEstat Data API: AS overview and routing status](https://stat.ripe.net/docs/data-api/) — RIPE NCC (2026-10-18) 2. [AS overview: AS20115 (Charter)](https://stat.ripe.net/data/as-overview/data.json?resource=AS20115) — RIPEstat (2026-10-18) 3. [AS overview: AS25613 (Mediacom residential, not announced)](https://stat.ripe.net/data/routing-status/data.json?resource=AS25613) — RIPEstat (2026-10-18) 4. [Charter Form 8-K: completion of the Cox transaction](https://www.sec.gov/Archives/edgar/data/1091667/000114036126033909/ef20080687_8k.htm) — Charter / SEC EDGAR (2026-10-18) --- 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.