Carriers
United States carrier proxy index
Every major carrier we route through, with the ASN you'll see at the exit and the state-level footprint we size against. If your workload depends on a specific ASN, pin it from the API.
Mobile carriers
4G LTE and 5G exits on the three US mobile carriers that matter — each announcing from its own ASN, routing through the carrier's own core.
AT&T
AS20057The Texas-home carrier, third-largest US mobile subscriber base, and the densest single combined mobile + fixed footprint of any US operator. Particularly strong across the South and I-95 corridor.
T-Mobile
AS21928The #1 US carrier by subscribers as of 2025. Dense standalone 5G, an IPv6-first mobile core, and the CGNAT footprint that TikTok and Instagram's integrity stacks treat as canonical mobile.
Verizon
AS22394The tightest CGNAT pools among the US big three. Legacy carrier trust signal, dense Northeast and Mid-Atlantic coverage, Ultra Wideband millimeter-wave in the top 30 metros.
Residential ISPs
Cable, fiber, and DSL ASNs in the residential pool. Coverage patterns differ — pick the carrier that's dominant in your target metro.
CenturyLink
AS209Lumen-operated residential footprint covering Mountain West, Pacific Northwest, and parts of the Midwest. The Tier-1 backbone side of AS209 gives the residential exits unusually clean peering paths.
Comcast
AS7922The largest US cable ISP by subscriber count. Densest in the Northeast, Mid-Atlantic, and Chicago metro. Xfinity residential IPs announcing from a peering-rich ASN.
Cox
AS22773The US third-largest cable ISP by subscribers, privately held, with a dense footprint in Phoenix, San Diego, Norfolk, Omaha, and Rhode Island. Where Cox serves, it often serves exclusively.
Frontier
AS5650Post-bankruptcy Frontier is a fiber-first operator focused on select regional markets. Where it serves, it's the primary residential broadband option — California Central Valley, Florida Panhandle, parts of Texas and Connecticut.
Spectrum
AS20115The second-largest US cable ISP after the 2016 Time Warner + Bright House + Charter merger. Strong in Texas, Florida, the Carolinas, and most of California outside the Bay Area.
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