T-Mobile vs Verizon vs AT&T for mobile proxy operations in 2026

The short version

For almost every US mobile proxy workload in 2026:

• Default to T-Mobile (AS21928) — #1 US carrier by subscribers, widest CGNAT pools, standalone 5G everywhere.
• Use Verizon (AS22394) when the workload needs sticky-session persistence above 15 min, or when the target's creative geo-gates Northeast / Mid-Atlantic specifically.
• Use AT&T (AS20057) when you're working the South (Texas, Georgia, Florida, Tennessee) or a workload where the target weights legacy Bell-ecosystem trust.

All three are default-trusted by every major US integrity stack. The differentiation is not "which one works" but "which one is statistically-expected for this traffic pattern."

Subscriber counts and market share, end-2024 / Q1-25

• Verizon Wireless: ~146M retail wireless connections (Verizon Q4 2024).
• T-Mobile USA: ~142M customer connections; became #1 by postpaid net-adds during 2025.
• AT&T Mobility: ~120M wireless subscribers.

Market share estimates from Statista put T-Mobile at 35%, Verizon at 34%, AT&T at 27% as of 2024-25 reporting. The practical implication: T-Mobile is now the statistically-most-common US mobile carrier signal, and integrity stacks training on 2025 data will weight it accordingly.

CGNAT behavior, side by side

The CGNAT (Carrier-Grade NAT) pool sizes are what actually matter for rate-limiting behavior and blast-radius math.

Dimension	T-Mobile	Verizon	AT&T
Subs per public IPv4 (dense metro)	10k–20k	4k–8k	6k–12k
Sticky-session hold window	~20 min	~20–25 min	~15–20 min
Standalone 5G coverage (2026)	Nationwide	Urban cores only	Limited metros
IPv6 by default	Yes (SA core)	No	No
Port exhaustion risk under load	Higher	Lower	Medium

T-Mobile's wider pools mean: (a) per-IP rate limits from a target are a smaller fraction of real users; (b) sticky-session rotation happens more often; (c) port exhaustion is a real concern for high-concurrency workloads. Verizon's tighter pools reverse all three.

Fingerprint signal differences

All three carriers read as "mobile carrier, trusted" on commercial GeoIP and on the major integrity stacks. Beyond that baseline:

• T-Mobile reads cleaner on platforms whose training data is post-Sprint-merger. That's most platforms in 2026. Meta, TikTok, Google, Amazon all weight T-Mobile AS21928 at default mobile trust.
• Verizon carries a legacy-carrier weight that some conservative integrity stacks (older retail platforms, financial-services verification) still bias toward positively. The bias is shrinking year-over-year but still observable in 2026.
• AT&T has a specific weight advantage in the South and in FirstNet-adjacent public-safety contexts. Outside those niches, third-trusted of the three for generic US workloads.

When each one wins

T-Mobile is the right pick for:

• TikTok US content automation and account warming. TikTok's integrity stack treats T-Mobile as canonical US mobile.
• Instagram / Meta ops at scale. The 2025 integrity rollout weights clean T-Mobile carrier routes as default-trusted.
• High-throughput ad verification where mobile bandwidth cost matters.
• Any workflow that wants native IPv6.
• Default pool for operators who don't have a specific reason to pick a different carrier.

See the TikTok US 2026 fingerprint teardown for the platform-specific details on why T-Mobile is the TikTok answer.

Verizon is the right pick for:

• Sneaker ops and Shopify Plus retail in the Northeast. Verizon's density in NYC / Boston / Philly and the tighter CGNAT mean fewer subs-per-IP competing for your rate-limit budget.
• Long session work where a sticky window needs to hold 15+ minutes without reassignment.
• Any workflow where the target geo-gates NY / NJ / MA / VA creative specifically.
• Conservative-fingerprint workloads where "legacy carrier" trust still matters.

AT&T is the right pick for:

• Texas work across all categories. See our Texas state page. AT&T's Texas density is the deepest single-state footprint of any US carrier.
• Southeast DTC retail. Atlanta, Nashville, Jacksonville creative that geo-gates regionally reads cleaner from AT&T.
• Workflows against brands that specifically weight AT&T (rare, but exists in legacy verticals — telecom retail, insurance, some automotive).

The MVNO question

Each of the big three hosts its own flagship MVNOs:

• T-Mobile hosts Metro by T-Mobile, Mint, Google Fi, and a tier of smaller resellers. Metro announces under its own ASN, Mint under its own. Some platforms down-score Mint specifically.
• Verizon hosts Visible, Xfinity Mobile, Spectrum Mobile, Tracfone/TracFone Wireless (post-acquisition). Visible announces under a separate sub-allocation.
• AT&T hosts Cricket Wireless, Consumer Cellular, H2O, Black Wireless. Cricket announces under AT&T-adjacent ASN paths.

Proxaro's default is host-only: MVNOs are excluded from the standard pool. Pass X-PX-Carrier-Host-Only: false if you want MVNO pass-through included. For most workloads, you don't.

The IPv6 advantage on T-Mobile

T-Mobile's standalone 5G core assigns IPv6 first and falls back to IPv4 via 464XLAT. In 2024 this was irrelevant for proxy operators — most targets didn't accept IPv6 from residential sources. In 2026 it's starting to matter:

• Cloudflare-fronted retail now serves IPv6-first to T-Mobile subscribers on ~30% of the storefronts we've measured.
• Google-hosted APIs (including some Shopify-adjacent endpoints) serve IPv6 preferentially from T-Mobile origins.
• A growing tier of DTC forward brands have dual-stack endpoints that respond differently on IPv6 vs IPv4.

If your workload talks to any of these, a T-Mobile v6 exit gets you a content variant that a v4 exit on the same ASN won't see. See /us/5g-mobile for the 5G-specific pool.

When to mix

Most production-scale workloads end up mixing two or three carriers. Reasons:

• Trust diversification. Running a single workload through a single ASN hits per-ASN rate limits faster than spreading across two. A 50/50 T-Mobile / Verizon split through a Carrier plan rotation reduces the aggregate signal at any individual target.
• Geographic weighting. If your target weights regional trust — e.g., insurance or banking where NY customers should look like NY customers — you want Verizon NYC rotation, not T-Mobile DFW. Mix by DMA.
• Failover. Carrier-level incidents (fiber cuts, routing issues) do happen. Multi-carrier rotation survives single-carrier events.

References

• Verizon Q4 2024 Earnings — 146M wireless retail connections
• T-Mobile Q3 2025 subscriber net-adds reporting (PhoneArena)
• AT&T 2024 10-K — wireless subscriber counts
• Statista: "Largest US network operators market share 2025"
• Ookla Speedtest Connectivity Report H1 2025

For the full carrier deep-dive, see: T-Mobile, Verizon, AT&T.