Blog
Longer answers to the questions a report cannot fit in a panel. What a record can settle, what it cannot, and where a signal that looks decisive is worth less than it appears.
No news and no announcements. Each piece is about a decision somebody is in the middle of, and it names the registries, feeds and prefixes involved rather than talking around them.
-
Best IP checking tools in 2026: reputation, fraud and history, compared
Search for the best IP checking tool and you get a dozen lists ranking a dozen products as if they did the same job. They do not. IPQualityScore, Scamalytics, Spur, IPinfo, MaxMind and the rest, sorted by the question you are actually asking, our own tool included and disclosed.
-
Vetting a subnet before you lease it: proxy, VPN and email providers
A proxy network, a VPN service and a bulk email sender look like three businesses and share one weakness exactly: they live or die by the reputation of the addresses they route from, and it is inherited. How each should read a range before it becomes theirs.
-
Why your leased subnet shows the wrong country, and how a geofeed fixes it
You announce a range from Frankfurt and half the internet still thinks it is where its previous holder sat. Geolocation lags reality, and a transferred range carries its old country like its old reputation. Why it happens, and the geofeed that fixes it.
-
Best IP leasing companies in 2026: the market, compared
Marketplaces, operators leasing their own space, and brokers matching the two: they are not the same kind of company, and the structure decides what you are buying. IPXO, InterLIR, Cogent, IPv4.Global, LARUS and Prefix Broker, compared honestly, with the one check none of their marketing runs for you.
-
How to warm up a newly acquired IP range for email
Every warming guide assumes a clean address waiting for its first message. A range you bought or leased is not that. History, records, delisting, then volume: the order is the method, and skipping the first three is how a careful ramp stalls in week two.
-
How to lease out unused IPv4 space without wrecking it
Idle space is income, and the marketplace landing pages will tell you exactly how much. What they leave out: reputation attaches to your addresses, not to the tenant, and what a lessee does with your space outlives the lease. The lessor's guide the platforms do not write.
-
How to check if an IP address is a VPN, proxy, or Tor exit
A signup lands from a new country and something has to decide in milliseconds whether the address is a person at home or a rented exit hiding one. The signals that separate a VPN, a proxy, a Tor exit and a plain datacenter address, and why one feed's yes is not the end of it.
-
How to research an ASN: ownership, transit, and the space it announces
An AS number is a network's public identity, and almost everything worth knowing is readable from it: who runs it, what address space it announces, who carries its traffic, and whether any of that has been quietly rearranged. How to read a network end to end, and which parts to trust.
-
How to investigate an IP address: a repeatable method
An address turns up in a log, an alert, or an abuse report, and the pressure is to say something now. A procedure that turns a lead into a finding: what the address is, who routes it, what it has been doing, what changed, and the point where the evidence runs out.
-
How to check a subnet's history before you buy or lease it
A transfer updates the registry the same week the money clears. It does not update anything that already decided whether traffic from those addresses is worth trusting. What to check before you commit, in what order, and what each answer is actually worth.
-
Why your newly bought IP range is already blocked
The range went live on a Tuesday. By Wednesday, mail to a customer on Outlook is bouncing, a payment processor is declining signups from three of the addresses, and somebody at a client office cannot reach your endpoint at all. You have held the space for six days. None of it is about anything you did.
-
Telling a hijacked prefix from a legitimate transfer
A prefix that was announced by one network last month is announced by another today. That single fact fits a routine sale between two consenting parties, and it fits a hijack. Nothing visible in the current state separates them. The difference lives entirely in the sequence.