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TECHNICAL DEEP DIVE

Build a Massive Mobile IP Pool with CGNAT

The Smart Way to Scale with 20+ Ports

Master CGNAT mathematics to build enterprise-scale mobile proxy farms. Learn how to leverage carrier-grade NAT for 20-30x IP diversity, implement production-ready orchestration, and achieve 95%+ success rates for web scraping and growth operations.

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100-500
IPs from 10 modems
20-30x
Port multiplier effect
95%+
Success rate target
2-5 Mbps
Per port bandwidth

CGNAT Architecture Visualization

Mobile Devices

100K-500K devices per carrier

CGNAT Layer

500-5000 IPs pool size

Public Internet

1:100-1:500 sharing ratio

Understanding CGNAT: Your Secret Weapon

Carrier-Grade NAT is the technology that makes mobile proxies undetectable and enables massive IP diversity at scale. Understanding its mechanics is crucial for building an effective proxy farm.

How CGNAT Works

Mobile carriers face IPv4 exhaustion. Their solution? CGNAT - sharing single public IPs among hundreds of users through sophisticated port allocation.

The Magic Numbers:

  • 1 Public IP โ†’ 100-500 mobile devices
  • Port ranges: 1024-65535 (64,000+ ports)
  • Typical allocation: 100-200 ports per device

Why This Matters for IP Pools

Undetectable Traffic

Your requests blend seamlessly with hundreds of real users on the same IP

Natural Port Diversity

Different ports = different user sessions to target servers

Dynamic Pool Changes

CGNAT pools rotate naturally as users connect/disconnect

The 4 Diversity Levers: Multiply Your IP Pool

Stack these techniques to transform a small farm into a massive IP pool with exponential diversity gains

Carrier Selection

High Impact

Different carriers = different CGNAT pools

Multiplier: 2-4x

Port Allocation

Very High Impact

20-30 ports per IP = 20-30 different 'users'

Multiplier: 20-30x

Rotation Timing

High Impact

Smart rotation captures CGNAT pool changes

Multiplier: 3-5x daily

Geographic Distribution

Medium Impact

Different regions = different IP blocks

Multiplier: 1.5-2x

Interactive IP Pool Calculator

10
20
6h
240
Concurrent IP Pool
960
Daily Unique IPs
Port Multiplier: 4.00x | Rotation Bonus: +200%

The Pool Math: Formulas That Matter

Core Formulas

Effective IP Pool Size

Pool = Modems ร— Carriers ร— (Ports/5) ร— RotationFactor
Where RotationFactor = (24 / RotationHours) ร— 0.5

Daily Unique IPs

DailyIPs = BasePool ร— (24 / RotationInterval) ร— CGNATChurn
CGNATChurn typically ranges from 1.2 to 1.8

Concurrent Capacity

Capacity = (Modems ร— Ports) ร— (1 - OverheadFactor)
OverheadFactor = 0.1 to 0.2 for management overhead

Real-World Examples

10 Modem Setup

  • Base IPs: 20-40 concurrent
  • With 20 ports: 200 sessions
  • Daily unique: 50-200 IPs
  • Monthly unique: 500-2000 IPs
  • Investment: $3,000-5,000

Quality Controls: Maintaining Elite Status

>95%

IP Reputation Score

Target:>85%
Critical:>95%
>98%

Rotation Success Rate

Target:>90%
Critical:>98%
>5 Mbps

Bandwidth per Port

Target:>2 Mbps
Critical:>5 Mbps
<1% hourly

Carrier Stability

Target:<5% daily churn
Critical:<1% hourly
>2000 IPs

CGNAT Pool Size

Target:>500 IPs
Critical:>2000 IPs

Monitoring Implementation

terminal
$ curl -X GET 'http://api.ipqualityscore.com/api/json/ip/YOUR_KEY/$IP'
{'success': true, 'fraud_score': 85, 'proxy': false, 'vpn': false, 'mobile': true}

Orchestration Blueprint: Production Architecture

Physical Infrastructure Setup

Hardware Requirements

  • USB hubs: Powered, 10-20 ports each
  • Modems: LTE Cat 4+ minimum
  • Server: 16GB RAM, 8+ cores
  • Cooling: Active ventilation required

Network Architecture

  • Load balancer: HAProxy or nginx
  • Proxy software: 3proxy or Squid
  • Management: Docker containers
  • Orchestration: Kubernetes (optional)
terminal
$ docker run -d --name proxy-manager -p 8080:8080 -v /modems:/modems proxy-orchestrator:latest

CLI Magic: Automation Scripts

Pool Management

#!/bin/bash
# Auto-rotation script
while true; do
for modem in $(list-modems); do
score=$(check-ip-score $modem)
if [[ $score -lt 85 ]]; then
rotate-modem $modem
fi
done
sleep 3600
done

CGNAT Discovery

# Discover CGNAT pool size
curl -s ipinfo.io/ip > current_ip.txt
for i in {1..10}; do
usb_modeswitch -R
sleep 30
curl -s ipinfo.io/ip >> pool.txt
done
sort -u pool.txt | wc -l
# Output: Unique IPs in pool

Frequently Asked Questions

Expert answers to common mobile IP pool questions

AC

Alex Chen

Senior Infrastructure Engineer at Coronium.io

Alex specializes in building scalable proxy infrastructure and has deployed mobile proxy farms serving millions of requests daily. With over 8 years of experience in network engineering and web scraping technologies, he leads Coronium's technical architecture team.

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