# What is a mobile proxy? > What is a mobile proxy? A 4G/5G modem lending its carrier IP. FiftyStateProxy: T-Mobile, AT&T, Verizon ports from $3.75/day, no KYC, crypto. - URL: https://fiftystateproxy.com/what-is-a-mobile-proxy/ - Last updated: 2026-10-29 - Publisher: FiftyStateProxy (https://fiftystateproxy.com) How 4G/5G proxies work, why carrier IPs behave differently, which US networks they use, and how a dedicated port compares with rotating traffic billed per GB. **Quick answer — What is a mobile proxy?** A mobile proxy is a proxy whose exit IP comes from a cellular carrier. Your traffic leaves through a 4G or 5G modem with a SIM card, so websites see a phone-network visitor. **FiftyStateProxy** offers dedicated T-Mobile, AT&T and Verizon ports at $3.75 for one day or $45 for 30 days, as of October 2026. No KYC — no ID, no selfie, no documents. Pay in crypto. ## Mobile proxies in short | Attribute | Value | | --- | --- | | Definition | A proxy that exits through a cellular modem and a carrier SIM | | US carriers at FiftyStateProxy | T-Mobile, AT&T and Verizon | | Network | 4G LTE or 5G, depending on carrier coverage at the modem location | | Carrier networks (RIPEstat) | T-Mobile USA AS21928 · AT&T Mobility AS20057 · Verizon (Cellco) AS22394 and AS6167 | | Dedicated US port | $3.75 for 1 day · $15 for 7 days · $45 for 30 days | | Data on a port | Unlimited data on your dedicated port, under fair use: the carrier may slow or pause very heavy use. One customer per modem, no resale | | New IP on a port | New IP on demand by rotation link or API call, at most once every 30 seconds. On 7-day and 30-day ports, 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 | | Rotating mobile (per GB) | From $1.50/GB. Rotating mobile (per GB): country-level targeting on every plan | | KYC and payment | No KYC — no ID, no selfie, no documents. Pay in crypto. | ## How does a mobile proxy work? A mobile proxy works by passing your requests to a modem that holds a carrier SIM and is attached to a 4G or 5G network. The modem sends each request over the cellular network. The website therefore sees the carrier's public IP address, not yours. **A US mobile proxy is a 4G or 5G modem on a T-Mobile, AT&T or Verizon SIM that lends its carrier IP to your requests.** A FiftyStateProxy dedicated port gives you a whole modem. Unlimited data on your dedicated port, under fair use: the carrier may slow or pause very heavy use. One customer per modem, no resale. You connect with the host, port and login shown in your dashboard. Login options: Username/password or IP allowlist. Proxy (data) access only: no SMS, no calls, and no direct access to the SIM card or the device. The guide on [how to rotate a mobile proxy IP](https://fiftystateproxy.com/how-to-rotate-a-mobile-proxy-ip/ "Rotate a 4G/5G proxy IP by link, API or timer") covers IP changes. ## What is CGNAT, and why does it matter for mobile proxies? CGNAT (carrier-grade NAT) is the method carriers use to put many subscribers behind one public IPv4 address. RFC 6598 reserves the 100.64.0.0/10 block as shared address space for that purpose. **Behind carrier-grade NAT, one public mobile IP is shared by many real subscribers at once, so blocking it also blocks paying customers.** Cloudflare wrote in October 2025 that one such address can stand for hundreds or even thousands of users. This makes a blanket ban on a carrier IP costly for the site that issues it. The effect has limits. The same Cloudflare study measured about three times more rate-limiting on CGNAT addresses than on other addresses. Carrier IPs still get challenged; they are costly to ban outright. T-Mobile US has moved its network to IPv6-only, using 464XLAT to reach IPv4 sites. ## Which carrier IPs does a US mobile proxy use? A US mobile proxy uses the public IPs of the carrier behind its SIM: T-Mobile, AT&T or Verizon at FiftyStateProxy. Each carrier announces its ranges under its own network numbers, per RIPEstat as of October 2026: - **T-Mobile USA:** AS21928. - **AT&T Mobility:** AS20057. - **Verizon Wireless (Cellco):** AS22394 and AS6167. Several prepaid brands run on these three networks, for example Mint Mobile and Metro by T-Mobile (T-Mobile), Cricket (AT&T) and Visible (Verizon). Their subscribers reach the web through the host carrier's network. The comparison of [T-Mobile vs AT&T vs Verizon proxies](https://fiftystateproxy.com/t-mobile-vs-att-vs-verizon-proxies/ "Which US carrier to pick for a 4G/5G proxy") helps you pick one. 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. ## Dedicated port or rotating per GB: which mobile proxy should I buy? Buy a dedicated port when you need one carrier IP that you control. Buy rotating mobile traffic when you need many carrier IPs for light, spread-out requests. | Point | Dedicated 4G/5G port | Rotating mobile (per GB) | | --- | --- | --- | | Billing | Per port: $3.75 for 1 day, $45 for 30 days | Per GB, from $1.50/GB | | Who uses the modem | You alone | A shared pool of carrier IPs | | Carrier choice | T-Mobile, AT&T or Verizon, subject to stock | Country-level targeting | | IP changes | When you rotate: link, API or timer | Per connection, or a sticky session | | Data | Unlimited under fair use | Paid per GB; unused GB never expire | | Good fit | One stable IP per account, long sessions | Light requests spread over many IPs | **A 30-day port at $45 costs 60% less per day than 30 one-day ports at $3.75 each.** Rotating mobile traffic drops from $2.99/GB on 1 GB to $1.50/GB on 100 GB. A port that runs all day for weeks is the cheaper route for heavy, steady use. ## When should I use a mobile proxy instead of a residential proxy? Use a mobile proxy for mobile-first platforms, for accounts that each need one stable IP, and for testing what phone users see. Typical jobs: - **Social media management:** an agency keeps one dedicated carrier IP per client account, in the client's region, and follows each platform's rules. See [the best US proxies for social media management](https://fiftystateproxy.com/best-us-proxies-for-social-media-management/ "Best US proxies for managing client social media accounts"). - **Mobile ad checks:** confirm which ads T-Mobile, AT&T or Verizon users receive. See [which US proxies suit ad verification](https://fiftystateproxy.com/best-us-proxies-for-ad-verification/ "Best US proxies for ad verification and geo-testing"). - **App and site QA:** load a mobile site or an app API through a real carrier network. For bulk public-data collection, residential traffic costs less: $0.52/GB against $1.50/GB for rotating mobile. Both mobile products sit on the page for [US mobile proxies with a dedicated carrier port](https://fiftystateproxy.com/us-mobile-proxies/ "US 4G/5G mobile proxies on T-Mobile, AT&T and Verizon"). ## How much does a mobile proxy cost with FiftyStateProxy? FiftyStateProxy prices a dedicated US mobile proxy at $3.75 per day, $15 per week or $45 per 30 days, as of October 2026. Rotating mobile traffic starts at $2.99 for 1 GB. Both are bought from a crypto balance, topped up from $1. The page on [how much a US mobile proxy costs](https://fiftystateproxy.com/pricing/ "US residential and mobile proxy prices") lists every plan. ## Which US mobile port length should I rent? | Plan | Quantity | Price | Price per unit | | --- | --- | --- | --- | | US · 1 day | 1 port · 1 day | $3.75 | $3.75/day | | US · 7 days | 1 port · 7 days | $15 | $2.14/day | | US · 30 days | 1 port · 30 days | $45 | $1.50/day | In every plan: Carriers (US): T-Mobile, AT&T, Verizon · Data: Unlimited on a dedicated port, under fair use · IP rotation: Link or API; timer on 7-day and 30-day ports **Before you pay** - Minimum top-up $1. Top up once in crypto, then buy any plan from your balance. - Unused balance stays on your account and never expires. When a purchase costs less than the minimum top-up, the part added only to reach the minimum is refundable on request to support within 30 days of the payment, in USDT or USDC, as long as it has not been spent. The rest of the balance 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 · XMR ≈ 20 min ## Mobile proxies: frequently asked questions ### Is a 5G mobile proxy faster than a 4G one? A 5G link carries more bandwidth where coverage is strong, but the network a port gets depends on where its modem sits. At FiftyStateProxy: 4G LTE or 5G, depending on carrier coverage at the modem location. The gateway hop also adds some delay to every request. ### Can I choose T-Mobile, AT&T or Verizon for my mobile proxy? Yes, on dedicated ports. 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. ### Do mobile proxies ever get blocked? Yes, no IP is immune. Carrier IPs are shared by many subscribers, which makes a blanket ban costly, yet Cloudflare found CGNAT addresses are rate-limited about three times as often. Pace your requests and rotate between tasks, not mid-session. ### Can I use one mobile port on several devices? Yes. Use your port from several of your own devices and tools at the same time; bandwidth is shared between them. Reselling or sharing access with third parties is not allowed. ### Does a mobile proxy include SMS or calls? No. Proxy (data) access only: no SMS, no calls, and no direct access to the SIM card or the device. ### Do I need ID to rent a US mobile proxy from FiftyStateProxy? No. FiftyStateProxy asks for no ID, no selfie and no documents. You pay in BTC, USDT, USDC, ETH, SOL, LTC, XMR from a $1 top-up. **Rent a US carrier IP** Dedicated T-Mobile, AT&T or Verizon 4G/5G ports, $45 for 30 days. No KYC — no ID, no selfie, no documents. Pay in crypto. [See mobile port prices](https://fiftystateproxy.com/pricing/ "How much do US proxies cost?") · [US mobile proxies](https://fiftystateproxy.com/us-mobile-proxies/ "Where can I buy US mobile proxies on T-Mobile, AT&T or Verizon?") ## Sources 1. [RFC 6598: IANA-Reserved IPv4 Prefix for Shared Address Space](https://www.rfc-editor.org/rfc/rfc6598) — IETF / RFC Editor (2012-04) 2. [Detecting CGN to reduce collateral damage](https://blog.cloudflare.com/detecting-cgn-to-reduce-collateral-damage/) — Cloudflare (2025-10-29) 3. [AS overview: AS21928 (T-Mobile USA)](https://stat.ripe.net/data/as-overview/data.json?resource=AS21928) — RIPEstat (2026-10-05) 4. [AS overview: AS20057 (AT&T Mobility)](https://stat.ripe.net/data/as-overview/data.json?resource=AS20057) — RIPEstat (2026-10-05) 5. [AS overview: AS22394 (Cellco / Verizon Wireless)](https://stat.ripe.net/data/as-overview/data.json?resource=AS22394) — RIPEstat (2026-10-05) 6. [List of mobile network operators in the United States](https://en.wikipedia.org/wiki/List_of_mobile_network_operators_in_the_United_States) — Wikipedia (2026-10-05) 7. [464XLAT](https://en.wikipedia.org/wiki/464XLAT) — Wikipedia (2026-10-05) --- FiftyStateProxy: FiftyStateProxy is a US proxy provider: residential IPs in all 50 states and Washington, D.C. with state, city, ZIP code and ASN targeting, plus dedicated T-Mobile, AT&T and Verizon 4G/5G mobile ports. No KYC — no ID, no selfie, no documents. Pay in crypto.