What Is an ISP Proxy (Static Residential)?

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An ISP proxy (also called a "static residential" proxy) is a static IP hosted in a datacenter but announced under a consumer ISP's autonomous system number (ASN). From the perspective of a website, the request comes from "Comcast" or "Deutsche Telekom" — a residential ASN, with the high trust score that implies — but the IP itself is stable and persistent because it lives in datacenter hardware. The combination is uniquely useful for sites that score multi-request session consistency, especially Akamai.

Trust score	High — uses residential ASN reputation
Stability	Static — same IP for the duration of your lease
Typical cost	~$1.50–5 per IP per month (vs ~$3–10/GB residential)
Best for	Akamai targets, account-tied scraping, continuous monitoring
Common providers	Bright Data ISP, Oxylabs ISP, IPRoyal, Massive ISP

How ISP proxies work

A provider partners with a consumer ISP (or operates under a sub-allocation from one) and gets a block of IPs announced under the ISP's ASN. The IPs physically live in the provider's datacenter, but BGP announcements and WHOIS records list the consumer ISP as the operator. To any anti-bot doing ASN lookup, the IP looks like a Comcast or BT residential connection — not a datacenter IP.

Because the IP is static and the provider controls the hardware, there is no rotation by default. You lease a specific IP for a fixed term (monthly, annually) and it is yours alone, or shared among a small pool, for that period.

Why Akamai scoring rewards ISP static

Akamai's Bot Manager scores sessions multi-request: trust accumulates as the same client makes consistent successful requests. The _abck cookie flips from ~-1~ to ~0~ after the first successful sensor.js POST and stays trusted as long as the session looks consistent. Rotating residential IPs mid-session resets this trust — Akamai treats it as a fresh, untrusted client. Static ISP IPs preserve the accumulation across hours or days, which matches how a real consumer browses.

For account-tied scraping (logged-in workflows, persistent shopping carts), ISP static is also the only sensible choice because session cookies need to survive on a stable identity.

When to use ISP vs residential vs mobile

ISP static: long sessions, Akamai, account-tied scraping, anything where multi-request trust accumulation matters.

Rotating residential: high-volume independent requests where each request is its own session — search scraping, SERP collection, listing snapshots.

Mobile: hardest DataDome and PerimeterX targets where IP reputation alone determines the outcome.

Cost-wise: ISP at ~$2/IP/month for hundreds of long-lived sessions is much cheaper than rotating residential GB pricing for the same workload.

Code example

python

from curl_cffi import requests

# Akamai-protected site: ISP static IP + Chrome TLS + warm-up
s = requests.Session(impersonate="chrome131")
isp_proxy = {"https": "http://user:[email protected]:port"}

# 1. Warm up on the homepage so _abck flips to ~0~
s.get("https://akamai-target.com/", proxies=isp_proxy)

# 2. Same session, same IP — trust accumulated, _abck trusted
for page in range(1, 11):
    r = s.get(f"https://akamai-target.com/listings?page={page}",
              proxies=isp_proxy)
    print(page, r.status_code)

Related terms

What Is a Residential Proxy?

A residential proxy routes your HTTP traffic through a real residential internet connection — a home broadband or fiber line — instead of th…

What Is a Mobile Proxy?

A mobile proxy routes scraper requests through 4G or 5G mobile-carrier IP addresses — T-Mobile, Vodafone, O2, AT&T, and similar networks. Be…

What Is Proxy Web Scraping?

Proxy web scraping is the practice of routing scraper traffic through proxy servers — intermediate machines that forward requests on your be…

What Is Akamai Bot Manager?

Akamai Bot Manager is an enterprise bot-protection product used by roughly 30% of the Fortune 500 — airlines, banks, retailers, ticketing. I…

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Frequently asked questions

How is an ISP proxy different from a residential proxy?

Residential proxies are sourced from peer-to-peer networks of real consumer devices — your request literally exits through someone’s home router. ISP proxies are datacenter-hosted hardware announced under a residential ASN. Both look "residential" to destination sites; ISP is faster and more stable, residential is more diverse.

Is an ISP proxy the same as a datacenter proxy?

Physically yes, but the ASN reputation is completely different. A datacenter proxy is announced under AWS, GCP, DigitalOcean, etc. — known datacenter ASNs that anti-bots flag instantly. An ISP proxy is announced under Comcast, BT, Deutsche Telekom, etc. — residential ASNs that anti-bots trust. The hardware is the same; the BGP announcement is what matters.

Can I rotate ISP proxies?

You can rotate across a pool of ISP IPs you control, but you should not rotate within a session on multi-request scored vendors like Akamai. The point of ISP static is stability — rotating defeats the purpose. Use rotating residential or mobile if rotation is what you need.

How many ISP IPs do I need?

For account-tied scraping: one per account. For session-based crawling: enough that you can run sessions in parallel without sharing IPs across simultaneous sessions. For most production setups, 50–200 ISP IPs in a region cover the common workloads.

Last updated: 2026-05-26