Real AT&T SIM Lines, Field by Field

Real US Proxies customers verify what they rent in a public IP checker, so this page describes an AT&T SIM as a checker does, field by field. AT&T is the steady carrier: addresses that hold for a long time, a conservative reputation with platforms, and the widest LTE coverage of the three, so a line keeps working when 5G dips. It also routes traffic through a few regional hubs, which shows up in the city field in one case every buyer should know about before checking. An AT&T line from us is one real AT&T SIM in a phone, modem or router we own in a US city, rented to one customer, with unlimited data and rotation on demand.

ISP and organisation: AT&T Mobility

The ISP field reads AT&T Mobility, from the public registry record of the block. AT&T's wireline broadband is registered separately, so a checker can tell an AT&T handset from an AT&T household, and a SIM in our rack reads as the handset.

ASN: AS20057

AT&T Mobility announces its wireless subscriber space under AS20057. Routing announcements are public and recorded by independent observers, so this field is the one to check first.

Connection type: cellular

Cellular, mobile or wireless. An AT&T SIM in our rack sits on AT&T's radio network like any subscriber's phone, and the classification websites rely on follows from that.

Country, state and city: the hub reading

United States, always. The state matches the SIM's city on every line except one case. AT&T aggregates mobile traffic at regional hubs and databases record an address at the hub's city, which for most of our cities is the city itself or a large neighbour in the same state. The exception is Boston: our Boston AT&T SIMs read New York, because New England traffic exits AT&T's network at its New York hub, so even the state field reads New York there. A buyer who needs Boston in the lookup takes Verizon or T-Mobile in Boston.

What rotation does to the fields

Rotation re-attaches the SIM and the hub assigns another address from its pool within seconds. ISP, ASN, type and country stay the same; the address changes and the city reading may move within the region. AT&T addresses left alone commonly hold for many hours, and AT&T occasionally re-maps a session on its own. Rotation is unlimited by link, API, dashboard, timer or hand.

Buyers who automate rotation on a schedule tend to leave AT&T on a longer interval than the other carriers, because the address so rarely moves on its own; a daily rotation between sessions is the common pattern, with the checker fields confirmed once after each.

Cities, devices and tiers

AT&T SIMs are stocked in all eight of our cities as the shelf allows, in phones, 4G and 5G modems and routers chosen at checkout. AT&T runs mid-band 5G in our cities over the widest LTE footprint of the three: 5G lines run up to 50 Mbps download and 4G lines up to 25 Mbps, subject to the radio minute, and eligible 5G lines take the 5G+ add-on for a 70 Mbps+ average download. When 5G dips the device falls back to LTE and keeps working.

Who chooses AT&T, and what it costs

Buyers running accounts who want a steady, conservative address over the fastest download, buyers whose work must survive a 5G dip on LTE, buyers whose accounts carry an AT&T phone number, and anyone whose work is judged at state level. Price is the same as any carrier here: 4G at $5 a day, $28 a week or $67 a month; 5G at $6, $33 or $76; a two-hour check at $2 on 4G or $3 on 5G. USDT TRC-20 first, same amount as in dollars.

AT&T proxy questions