AT&T Mobile Proxies in the United States

An AT&T mobile proxy is a proxy whose exit address belongs to AT&T Mobility, the wireless division of AT&T and one of the three nationwide US carriers. Mobile Proxy USA supplies AT&T lines as a single AT&T SIM in a single 4G or 5G device we own, in any of our eight US metros, assigned to one customer for the term of the plan. This page states the facts a buyer needs about AT&T addresses in particular: how they are announced, how they are shared, where they geolocate, how they behave on rotation, and what the line costs.

How an AT&T address is identified

AT&T Mobility announces its wireless subscriber address space under autonomous system AS20057. An IP lookup on an AT&T line returns that AS number, AT&T Mobility or a similar name as the organisation, and a connection type of cellular or mobile in the major reputation databases. Because AT&T's wireline broadband business announces under different AS numbers, a lookup distinguishes an AT&T phone from an AT&T home fibre connection, and a mobile proxy on an AT&T SIM shows as the former.

Shared by design

AT&T, like the other carriers, places many subscribers behind each public IPv4 address through carrier-grade NAT. The address a Mobile Proxy USA AT&T line holds is simultaneously in use by a large number of AT&T phones in the same region. Websites and fraud-scoring services know this and treat AT&T addresses as consumer traffic that cannot be blocked without blocking real customers. For the proxy user this is the source of the address's reputation, and it also explains why a reputation score on an AT&T address reflects the crowd rather than the line.

Where AT&T addresses geolocate

AT&T routes mobile traffic through a modest number of regional gateways, and geolocation databases place an AT&T address at the gateway's registered location rather than at the phone. The practical result is that an AT&T line resolves to a large city in its region, which is often the metro the device is in and sometimes a neighbouring hub. The clearest example in our footprint is Boston: AT&T lines in Boston geolocate to New York, because New England traffic leaves through the New York gateway. Lines in New York, Los Angeles, Chicago, Houston, Phoenix, Miami and North Carolina generally resolve to their own metro or to another city in the same state. State-level accuracy is reliable everywhere except that Boston reads as New York State; country-level accuracy is complete.

Rotation and sticky sessions on AT&T

A rotation reconnects the device's data session, and AT&T assigns a new public mapping from the regional pool. New addresses arrive within seconds, repeats happen because the pool is finite, and the carrier occasionally changes an address on its own when it resets a session. Left alone, an AT&T line commonly keeps the same address for many hours, which suits account work. Rotation is unlimited and can be triggered by link, API, dashboard, timer or by hand.

Cities, devices and speed

AT&T SIMs are offered in all eight Mobile Proxy USA metros: New York, Los Angeles, Chicago, Houston, Phoenix, Miami, North Carolina (Charlotte and the Research Triangle) and Boston, subject to stock on the day. The device is chosen at checkout from USB modems, cellular routers and Android phones. AT&T's 4G LTE network is extensive and its 5G network covers all eight metros. 4G lines usually run 20 to 45 Mbps, 5G 50 Mbps and up, with the usual variation of any radio link. A line can be moved between cities for free with its remaining time, which is the simplest way to compare AT&T gateways.

Who picks AT&T

Buyers who want the most conservative, widely trusted carrier reputation, buyers who need New York geolocation with extra address depth, and buyers whose target audience skews toward AT&T, which has strong share among business and older consumer subscribers. Buyers who need exact metro geolocation in Boston should choose T-Mobile or Verizon there instead.

Pricing and access

An AT&T line costs the same as any carrier at Mobile Proxy USA: 4G at $5 per day, $28 per week or $65 per month; 5G at $6 per day, $31 per week or $75 per month; an hourly test at $2 for the first two hours on 4G or $3 on 5G, then the same per further hour up to four hours, never renewing. Every plan includes unlimited data, unlimited rotation, HTTP(S) and SOCKS5 access with UDP over SOCKS5, a VLESS tunnel on server-based lines, free moves between cities and 24/7 human support by email and Telegram. Activation is immediate at area.mobileproxyusa.com.

AT&T proxy questions