How to Tell a Datacenter IP from a Home IP: ASN Lookup Step by Step
Look up an IP's ASN and the organization behind it, read the network-type label, and see why 'isp' does not always mean a home line.
Fake Residential Proxy: Red Flags Before You Pay
Eight red flags, a lookup you can run yourself, and why a small test purchase beats any promise.
What "residential" can mean on a sales page
Three different things get sold under the word residential: addresses from real home connections in a rotating pool; ISP-registered static addresses held on servers, which the trade calls ISP proxies or static residential; and datacenter addresses given a residential label. The first two are honest products with different properties. The third is the one to avoid.
So the useful question is not whether an address sits in a datacenter, but whether the seller's description matches what a lookup shows. A seller who says "static ISP address" and delivers one is fine. A seller who says "home broadband" and delivers a cloud-hosting network is not.
Eight red flags and how to check each
| Item | What you see | How to check |
|---|---|---|
| 1. Hosting company behind the address | The organization is a cloud or hosting company, not an internet provider | Look up the ASN and organization through the proxy; read the type and the organization name |
| 2. The seller will not name ISPs or countries before payment | Vague wording such as "premium residential" with no network names | Ask in writing which ISP and which countries; compare with your lookup |
| 3. Several ISPs advertised, one organization delivered | Listing shows many providers; every test address returns the same one | Buy a few addresses and compare the organization names |
| 4. Addresses crowded in a few ranges | Test addresses sit next to each other in the same range | Compare the first three numbers of each address; ask about range variety |
| 5. Reverse DNS or registration names a server host | Host names or registration records that read like a server farm | Run a reverse lookup and a registration lookup on the address |
| 6. Location databases disagree | Two tools place the address in different countries or cities | Check at least two lookups; see the guide on wrong-city results |
| 7. No small purchase and no stated remedy | Only large bundles, and no stated rule for a failed address | Ask for the smallest term and what happens if an address fails |
| 8. Promises about outcomes | "Never blocked", "100% clean", "works on every site" | No honest seller can promise this; treat it as a flag |
Flags 1, 3 and 5 follow IPinfo's documentation on how network types are assigned (read 13 November 2026); flags 2, 4 and 6 are our own checking method. Each flag is a signal to look closer, not proof by itself.
How to verify, before and after paying
Step 1: Ask the written questions
Which ISPs, which countries, which protocols, what the smallest purchase is, and what happens when an address stops working. A seller that cannot answer is flag 2 and flag 7.
Step 2: Buy the smallest term
One address for the shortest period. You are testing the seller, so spend as little as possible.
Step 3: Look up the exit address
Read the ASN, the organization and the type. If it says hosting, note it and go on to step 4 before judging.
Step 4: Cross-check
Run the reverse and registration lookups from the code below, then a second location database. IPinfo says some organizations run ISP and hosting services under one ASN, so a single odd label is not a verdict.
Step 5: Run your real task
Use the address for the job you bought it for. Keep the lookup results and the outcome together.
Three lookups for one address
# 1. Which ASN and organization does the exit address belong to?
curl -s --max-time 20 -x "http://LOGIN:PASSWORD@HOST:PORT" https://ipinfo.io/json
# 2. Reverse DNS and registration record of the address you got back
dig -x 203.0.113.10 +short
whois 203.0.113.10 | grep -i -E 'orgname|org-name|netname|descr|country'Example only: replace LOGIN, PASSWORD, HOST and PORT with your proxy details and 203.0.113.10 (a documentation address) with the address the first command returns.
How Proxy302 describes its own addresses
Proxy302 sells static ISP IPs as ISP-registered addresses held for the lease term, from US$0.50 for 1 day to US$23.97 for 90 days, and sells datacenter IPs as datacenter IPs from US$0.25 for 1 day. We do not label datacenter addresses as residential, and a hosting label on a datacenter IP is expected.
You can run the same checks on ours. There is no free trial, so the one-day static ISP IP is the test. A failed IP is reissued after a Support ticket with the order number.
Fake residential proxies: common questions
How can I tell a fake residential IP from a real one?
Combine the checks: organization and type, registration and reverse-DNS names, agreement between two location tools, and how the seller answers. No single check is proof.
My lookup says hosting. Is the IP fake?
Not necessarily. ISP proxies are ISP-registered addresses hosted on servers, and databases classify mixed networks by their own rules. It is a reason to cross-check.
Is a low price a sign of a fake?
Not by itself. Compare the delivered address with what was advertised instead of reading the price.
Is there a free trial to test with?
Not at Proxy302. The smallest purchase is one static ISP IP for one day at US$0.50.
Keep reading
Static IP shows datacenter
Why a checker labels a static IP as datacenter, a 5-step check, and when to contact support.
ISP proxies explained
What an ISP proxy is, what a lease costs from US$0.50 a day, where the break-even against pay per GB sits and which limits apply.
Why IP checkers disagree
Five IP checkers, five different things measured: how to compare them in 5 steps before you buy.
What is a home-broadband IP
What a home-broadband IP means, how it differs from a datacenter IP, how to check one with ipinfo, and how to buy a static residential ISP IP.
Reference links
3
- IPinfo community: how ASN types are classified
Official documentation · Confirmed on:
Read on 13 November 2026: the ASN type (isp, hosting, business, education) is inferred by a statistical model that returns the highest-scoring type; types are not exclusive and one organization can hold ASNs of different types, so each ASN should be checked.
- IPinfo community: how hosting and ISP connection types are decided
Official documentation · Confirmed on:
Read on 13 November 2026: classification starts from IP behavior and public internet records, rolled up to ranges and ASNs; smaller organizations may use one ASN for both residential/ISP and hosting services, which causes misclassification that IPinfo corrects on request.
- Proxy302 product facts and price list
Product observation · Confirmed on:
Product facts file of the site, checked 13 November 2026 against the console, the backend and the price table: static ISP prices and lease terms, per-GB prices, protocols and ports, countries listed, renewal rules, no free trial.
Ready to try it?
Create an account, top up once, then pick rotating residential, static ISP or datacenter IPs and have one running in your browser within minutes.