AT&T Lines from the Chicago Rack

An AT&T line from Chicago Proxies is one AT&T SIM in one modem, router or phone that we run in our rack in Chicago, rented to you and nobody else for the time you paid for. This page is the plain version of what that gets you: how the address looks to a website, how AT&T hands out and changes addresses here, what hardware we have it in, and who tends to choose AT&T over the other two carriers.

What a website sees

Look up one of our AT&T addresses on any IP information site and the organisation comes back as AT&T Mobility, autonomous system AS20057. The address type is mobile, the country is the United States and the region is Illinois; the city field most often reads Chicago, though some databases name a suburb or a larger Midwest area, because the pool is regional rather than tied to a single street. Nothing about the record says proxy, hosting or data centre, because there is nothing of the kind in the path: your request leaves a real AT&T SIM over a real AT&T radio link.

AT&T puts its mobile subscribers behind carrier-grade network address translation. The public address on your line is shared at that moment with phones across the Chicago area that happen to sit on the same gateway. That is the whole reason a mobile address carries weight: a site that blocked it would be blocking its own visitors on the L and in the Loop. Because it is shared, the address is also not unique to you, and you may see the same one again after you rotate. We mention this up front because people sometimes read a repeat as a fault; on AT&T it is normal.

4G and 5G in our Chicago rack

Our AT&T hardware in Chicago is a mix of 4G LTE modems and 5G-capable routers and phones. On the 4G devices you can expect the typical 20 to 45 Mbps range we quote everywhere, and on 5G hardware 50 Mbps and above when the tower cooperates. AT&T's 5G coverage in the city core is solid and the rack sits where it sees it well. Which bands a given device camps on is decided by the radio and the tower, not by us, so the number you measure will move around during the day, especially in the evening when the neighbourhood's phones come home.

You choose 4G or 5G at checkout. The 5G plans cost a little more: $6 for a day, $31 for a week and $75 for a month, against $5, $28 and $65 on 4G, with hourly starting at $2 for two hours on 4G and $3 on 5G. For most account work the 4G line is plenty; the 5G line earns its price when you push larger pages, media or many parallel sessions.

How rotation behaves on AT&T

Left alone, an AT&T session is sticky. The carrier keeps the same public address for as long as the modem holds its data session, which can be hours or, on a quiet device, days. When you want a new address, you trigger it: from the dashboard, from the rotation link you can paste into any script, from the API, or on a timer you set. The modem drops and re-attaches, AT&T assigns a fresh address from the Chicago-area pool, and the line is back in well under a minute on most devices.

Two honest notes. First, AT&T's regional pool is not infinite and the gateway hands you whichever address is free, so repeats happen, more often during busy hours. Second, AT&T occasionally resets a session on its own side, which shows up to you as an unrequested address change. Both are properties of the carrier network that every AT&T phone in Chicago experiences too; they are not something we can or should engineer away.

Who picks AT&T

People choose AT&T in Chicago for a few consistent reasons. Its addresses geolocate cleanly to Illinois and usually to Chicago itself, which matters for anyone checking how a storefront, an ad or a listing appears to a local. Its mobile pool is large and long established, so AT&T addresses have a long history of ordinary consumer use behind them. And the 4G LTE network here is mature, which means a 4G AT&T line is a dependable, lower-cost default for account management, marketplace work, research and verification tasks that need a Chicago address rather than raw speed.

If your work leans on fast rotation with many distinct addresses in a short window, read our T-Mobile page as well before deciding; T-Mobile's Chicago pool tends to turn over differently. If you need an address that stays put for a long time with as little carrier-side change as possible, Verizon is worth a look. All three run the same prices, the same dashboard and the same unlimited data, so the choice is about carrier behaviour, not features.

Stock, plainly

We keep a finite number of AT&T SIMs in the Chicago rack and we add hardware as demand justifies it. On most days there are free AT&T lines on both 4G and 5G, but there are also days when 5G AT&T is sold out while 4G is open, or the reverse. The checkout page shows only what is actually free at that moment, so what you can click is what you can have; we never oversell a device. If AT&T is out when you look, you can take a T-Mobile or Verizon line now and move to AT&T later from the dashboard, at no cost, with your remaining time carried over.

Everything else is the same across our carriers: HTTP(S) and SOCKS5 with UDP, instant activation after payment, unlimited data under the fair use rule, a free move between our US cities, and a person on support around the clock by email and Telegram.

AT&T proxy questions