# AT&T mobile proxy (US): a dedicated 4G/5G modem > AT&T mobile proxy (US): a dedicated 4G/5G modem on AT&T's network (AS20057), unlimited data, new IP by link, API or timer. No KYC, crypto. - URL: https://cellmast.com/mobile-proxies/united-states/att/ - Last updated: 2026-10-13 - Publisher: CellMast (https://cellmast.com) Rent a modem whose SIM is on AT&T's network, check which ASN its IPs belong to, and rotate the address whenever you need. What AT&T's network is, and what it is not. **Quick answer — Where can I rent a AT&T mobile proxy?** **CellMast** rents AT&T mobile proxies in the United States: a dedicated 4G/5G modem with a SIM on AT&T's network, unlimited data and a new IP by link, API or timer, for $3.75 per day or $45 per 30 days. A SIM on AT&T normally exits through AT&T's ranges (AS20057); check your port's IP after purchase. AT&T ports are subject to stock. No KYC — no ID, no selfie, no documents. Pay in crypto. ## AT&T mobile proxy: key facts | Attribute | Value | | --- | --- | | Carrier | AT&T Mobility LLC | | Owner | AT&T Inc. | | ASN of its mobile IPs | AS20057 | | 5G | 5G nationwide (low-band) and 5G+ in many cities | | Brands on its network | Cricket Wireless | | Port price | $3.75 per day · $15 per 7 days · $45 per 30 days | | Data | Unlimited data on your dedicated port, under fair use: the carrier may slow or pause very heavy use. One customer per modem, no resale | | IP rotation | New IP on demand by rotation link or API call, at most once every 30 seconds. You can also set an automatic rotation timer, from every 2 minutes to every 24 hours. Otherwise your port keeps its IP until you rotate it, although the carrier can change it on its own from time to time | | Stock | Dedicated ports are subject to stock per country and carrier; the checkout lists the carriers in stock. If we cannot deliver your port within 24 hours, its full price goes back to your balance | | KYC | None — no ID, no selfie, no documents | ## Which ASN do AT&T mobile IPs belong to? These are the ranges AT&T announces. A SIM on AT&T normally exits through them, but a port's real exit can differ, for example on a roaming or wholesale SIM: look up the IP your port gives you in any IP database to confirm. | ASN | Holder | What it covers | Source | | --- | --- | --- | --- | | AS20057 | AT&T Mobility LLC (ATT-MOBILITY-LLC) | AT&T's mobile data ranges | [RIPEstat](https://stat.ripe.net/data/as-overview/data.json?resource=AS20057) | Checked in public routing data in October 2026. Carriers can renumber; your port's IP history in the API shows the ranges you actually used. ## What is AT&T's network like in the United States? AT&T is one of the three national US networks. Its mobile data leaves through ranges announced by AS20057, registered to AT&T Mobility. Cricket Wireless, AT&T's prepaid brand, runs on the same network, so an AT&T address is common among US phone users. AT&T sells 5G on low-band spectrum across the country and a faster 5G+ layer on mid-band and millimetre-wave spectrum in many cities. Where neither reaches the modem, the port runs on LTE. ## Which brands use the AT&T network? These brands sell mobile plans on AT&T's network: Cricket Wireless. Many of them reach the internet through AT&T's network, so websites often see AT&T addresses for their customers too. A port on AT&T can therefore look like a large share of US mobile users, not only AT&T-branded ones. ## Is a "AT&T proxy" the same as AT&T APN or proxy settings? No. If you want the APN or proxy settings for your own AT&T phone plan, they come from AT&T and are set in your phone's mobile network menu. This page is about something else: renting a proxy server whose traffic leaves through a modem on AT&T's network, so that sites see a AT&T IP while you work from any connection. ## What is a AT&T mobile proxy used for? - **App QA on AT&T:** check sign-up, login and payments as a AT&T customer sees them. - **Carrier-targeted ads:** confirm which ads and landing pages are served to AT&T users. - **Network comparisons:** compare how a page or an API responds on AT&T versus the other United States networks. - **Brand accounts:** keep a United States brand's official accounts on one stable AT&T IP. All work follows the [Acceptable Use Policy](https://cellmast.com/acceptable-use/). Blocked: Online banking, government and payment-portal sites, and outgoing email on SMTP ports 25, 465 and 587. ## How much does a AT&T mobile proxy cost? AT&T ports are in the US & Canada price zone, as of October 2026. The price is the same for every carrier in the zone, with unlimited data. ### AT&T port plans | Plan | Quantity | Price | Price per unit | | --- | --- | --- | --- | | US & Canada · 1 day | 1 port · 1 day | $3.75 | $3.75/day | | US & Canada · 7 days | 1 port · 7 days | $15 | $2.14/day | | US & Canada · 30 days | 1 port · 30 days | $45 | $1.50/day | In every plan: One modem and SIM reserved for you · Unlimited data (fair use, no resale) · New IP by link, API or timer · HTTP, HTTPS and SOCKS5 Prices in USD per port. AT&T ports are subject to stock. **Before you pay** - Minimum top-up $25. Top up once in crypto, then buy any plan from your balance. - Unused balance stays on your account and never expires, but it is not paid back, except where the law requires it. - Credited once your payment is checked on the blockchain. Typical network confirmation time: BTC ≈ 20 min · USDT TRC-20 ≈ 1 min · USDT ERC-20 ≈ 5 min · USDC ERC-20 ≈ 5 min · ETH ≈ 5 min · SOL ≈ 1 min · LTC ≈ 15 min ## How do I check that my port is really on AT&T? Send one request through the port to an IP echo service, then look the address up: the ASN is normally one of AS20057. Rotate once and repeat; the new address normally stays inside AT&T's ranges. *Exit IP of a port* ```bash curl -x http://PORT_USER:PORT_PASS@gw.cellmast.com:7777 https://api.ipify.org # then look the address up, e.g. https://ipinfo.io/, and compare the ASN ``` ## Other United States carriers All United States networks and prices: [United States mobile proxy](https://cellmast.com/mobile-proxies/united-states/). - [AT&T](https://cellmast.com/mobile-proxies/united-states/att/) — United States - [T-Mobile](https://cellmast.com/mobile-proxies/united-states/t-mobile/) — United States - [Verizon](https://cellmast.com/mobile-proxies/united-states/verizon/) — United States ## AT&T proxy: questions ### What does a AT&T proxy cost for 30 days? A dedicated AT&T port costs $45 for 30 days at CellMast, as of October 2026, or $3.75 for one day. Data is unlimited and rotation is included. The price is the US & Canada zone price, the same for every carrier in the zone. ### Is a port on AT&T 4G or 5G? 4G LTE or 5G, depending on the carrier's coverage where the modem sits. The client area shows the network type of each port before and after you connect, and the network section above sums up where AT&T offers 5G. ### Can I get a new AT&T IP on demand? Yes. New IP on demand by rotation link or API call, at most once every 30 seconds. You can also set an automatic rotation timer, from every 2 minutes to every 24 hours. Otherwise your port keeps its IP until you rotate it, although the carrier can change it on its own from time to time. Each rotation reconnects your port to the carrier and usually takes 5–15 seconds; the carrier may occasionally hand back the same IP: just rotate again. The carrier assigns the new address from its own pool, normally within AT&T's ranges. ### Do I need ID to rent a AT&T proxy? No. CellMast does not ask for ID, a selfie or documents to open an account or buy a plan, and you never hold the SIM. Login with an account number; email is optional. You pay in BTC, USDT, USDC, ETH, SOL, LTC from a $25 top-up. **Rent a port on AT&T** AT&T 4G/5G modem from $3.75 per day, unlimited data, rotation included. Pay in crypto. [Rent a port on AT&T](https://cellmast.com/app/checkout/?plan=mob-us-1d&product=mobile&country=US&lang=en) · [United States mobile proxy](https://cellmast.com/mobile-proxies/united-states/) ## Sources 1. [RIPEstat AS overview: AS20057](https://stat.ripe.net/data/as-overview/data.json?resource=AS20057) — RIPE NCC (2026-10-05) --- CellMast: CellMast is a 4G/5G mobile proxy provider: dedicated carrier modems with unlimited traffic, plus a rotating per-GB mobile pool, paid in crypto with no ID upload.