Undetectable Mobile Proxies: Carrier CGNAT Addresses That Score Clean

Undetectable mobile proxies are not a trick. To a website, a SpoofProxies line is a phone on AT&T, T-Mobile or Verizon in a US city, because on the wire that is exactly what it is: one USB modem, 4G/5G router or real handset holding one consumer SIM, racked in the metro you choose and used by nobody but you. The address it hands out is a carrier CGNAT address shared with thousands of ordinary subscribers, which is why it scores clean on the reputation systems that flag datacenter and recycled residential ranges on sight. This page explains the mechanism rather than the marketing: why carrier addresses are trusted, what a fraud score actually measures, how CGNAT works in your favour, what time zone and fingerprint consistency you still owe the target, and what a dedicated clean line costs from $6 a day.

Terms for a dedicated clean line

Every plan is one real SIM in one device for one customer, with unlimited data and unlimited rotation. Choose the length and the radio; the trust is the same on every row.

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Why a carrier address scores clean

Reputation systems classify an address before they look at anything else. A datacenter range is known to belong to a hosting company, so a login from it looks like a server. A residential pool address has usually been seen behind too many different browsers in too short a time, so it looks like a proxy. A carrier address belongs to a mobile network, and mobile networks are where real people are, on real phones, doing exactly the kind of things websites want to see.

That classification is not something a provider can fake. It comes from the address block the carrier owns and announces, and the only way to exit from it is to hold a SIM on that carrier and route through its network. Every SpoofProxies line does precisely that, with a consumer SIM in dedicated hardware in a US metro. There is nothing relabelled, nothing tunnelled through a server somewhere else, and nothing recycled from a public proxy list.

The practical effect is that your traffic starts each session in the most trusted address class there is, and stays there, because the hardware is yours alone and nobody else's behaviour is attached to it while it is yours.

CGNAT, the mechanism behind the trust

Carriers have far more phones than public addresses, so they place thousands of subscribers behind each one using carrier-grade network address translation. From the outside, one public address is a whole crowd of people in one city browsing, shopping, scrolling and logging in. Your line sits inside that crowd.

This is what makes a block expensive for the website. Banning the address does not ban one bad actor; it bans everybody behind it, including paying customers, and the platform hears about it quickly. Anti-abuse systems therefore treat carrier CGNAT addresses with far more patience than any other class: they look harder at behaviour and far less at the address itself. A line that behaves like a phone is extraordinarily hard to separate from the phones around it.

CGNAT is also why a rotation on our lines produces a clean address every time. The modem renews its carrier session and is placed behind a different public address from the same carrier in the same metro, carrying the same crowd of real users and the same reputation.

Fraud score, and what actually moves it

Fraud score is a composite that address-reputation services compute from the address class, the network it belongs to, how many distinct devices have been seen behind it, whether it appears in known proxy or VPN lists, and recent abuse reports. We do not quote a number for our lines because a published figure from one vendor on one day is marketing, not information; the component that matters is that carrier mobile addresses sit in the lowest-risk class and are shared with so many legitimate users that a single bad actor cannot drag them down.

What you control is the rest of the composite. An address that suddenly shows fifty browser fingerprints in an hour looks like a proxy no matter who owns it. An address whose traffic claims a time zone the carrier does not serve looks wrong. Our side is the address and the hardware; your side is behaviour that matches a person on a phone. The two together are what the word undetectable actually means.

Time zone, fingerprint and the half you control

A clean address can be undone by a sloppy client. Websites compare what the address says about you with what the browser says about you, and inconsistencies are their favourite signal. If your line exits in Houston, the browser profile riding it should report Central time, US English and a locale that fits. If the line is on a US carrier, the device fingerprint should be plausible for a US consumer. Antidetect browsers exist to make that consistent, and our setup guides cover the common ones.

Geography is on our side here because every line is physically racked in the metro named on your plan. An address from our Los Angeles rack geolocates to Los Angeles, resolves to the carrier, and sits in Pacific time. You never have to explain a mismatch between where the address says you are and where the carrier says the phone is. If a job moves to another coast, move the line from the dashboard, free, and update the profile's time zone to match.

For targets that examine the device as well as the address, choose the real phone at checkout. It is a genuine handset on a carrier plan, so the device side of the fingerprint is not an imitation of a phone, it is one.

Sticky or rotating: which stays unseen

Both, for different jobs. Anything with a login, a cart or a profile should stay on one address for the length of the session, because real phones do. On our lines that is the default: leave the line alone and the carrier address holds for as long as the carrier keeps the lease, typically hours and often longer. Velocity checks that look for an account hopping between addresses never fire.

Collection work that touches a target many times is the opposite case, and there rotation keeps any one address from accumulating a suspicious volume. Rotate from the dashboard, your personal rotation link, the API or a timer, as often as you like, with no quota. Each new address is another carrier CGNAT address in the same metro with the same crowd behind it. The usual pattern is to hold steady within a session and rotate between sessions or batches.

Phone, router or modem: when the hardware matters

All three hardware types hand out the same class of carrier address, so for the address alone a USB modem is enough and is the right default. The 4G/5G router carries the same SIM with router-grade stability for lines that must stay up for weeks, which suits long-running profiles that should never see a reconnect. The real phone is for the targets that go beyond the address and inspect the device, where a genuine handset removes the last thing there is to detect.

Whichever you choose, the device is dedicated: one SIM, one piece of hardware, one customer for the term. The reputation of the address is never shared with another customer's activity, which is the quiet reason dedicated lines stay clean where pools do not.

Where the SIMs live

Lines are racked in New York, Los Angeles, Chicago, Houston, Phoenix, Miami, Boston and North Carolina, on AT&T, T-Mobile or Verizon depending on what is in stock in each metro. Each metro has its own page below describing the carriers present and how its addresses geolocate, so you can pick an exit that fits the identity you are building rather than the other way round.

Because the hardware is physically in the city, a move between metros is a real move: the line is re-homed to another rack and the new address belongs to the new city. It is free and self-service from the dashboard, and completes in a couple of minutes.

Speed and protocols behind the clean address

Trust does not cost throughput. A 4G LTE line sustains 20 to 45 Mbps and a 5G line sustains 50 Mbps and up, with unlimited data on every plan, so parallel sessions and media-heavy targets are fine. Every line exposes HTTP(S) and SOCKS5 on their own ports, with UDP over SOCKS5 for emulators, mobile apps and game clients. Authenticate by username and password or by whitelisting your own address.

Browsers, antidetect profiles, bots, emulators and custom tooling all connect directly, with no wrapper or workaround. The IP checker on the tools page shows the exit address, its carrier and its city so you can confirm the line reads as the phone it is before you point an account at it.

Pricing for a dedicated clean line

Hourly lets you test a target before committing: $2 for the first two hours on 4G LTE and $2 per additional hour, $3 and $3 on 5G, up to four hours per purchase, and it never auto-renews. Keep the line for the full day and the hours you paid are credited toward the daily price. Daily is $6 on 4G or $7 on 5G, weekly is $31 or $36, and 30 days is $72 or $85, the lowest cost per day and the term with optional auto-renew for profiles that must never lapse.

Rotation, both protocols, UDP, whitelisting and metro moves are all included at every term; there are no add-on tiers for trust, speed or features. Card, PayPal, crypto, Zelle and wire payments are accepted.

Ordering and the 24-hour guarantee

Open an account at the console, add balance, and choose the term, 4G or 5G, the metro, the carrier and the hardware. The line activates the instant payment clears and the host, port and credentials appear on screen. Configure your profile to match the metro's time zone and locale, run the IP checker, and begin. If within the first 24 hours of a first order the line does not perform against your target, write to support and we fix it, move it or refund it. Support is online around the clock, every day of the year.

Undetectable mobile proxies: detection and trust questions