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Spam and call blocking

Caller ID, unwanted calls and do-not-call obligations, from the point of view of the business placing and answering the calls.

September 9, 2026

Caller ID lookup: what it can tell you

A reverse lookup answers questions about a number, not about a person. What the query can actually establish, what it cannot, and what to do instead.

September 9, 2026

How caller ID actually works

The number travels with the call. The name does not. One fact about how the two are delivered explains almost every caller ID question a business has.

September 9, 2026

How to block unwanted calls

The measures that work, ordered by how much each one removes, with the gap next to each. Nothing on this list is complete, and that is the useful part.

September 9, 2026

How to scrub a calling list

Seven passes in order: normalise, drop what is out of scope, scrub the registry, apply your own list, check the windows, gate on local time, record it.

September 9, 2026

Screening calls without losing customers

Every notch of call screening buys quiet and costs callers. How to pick the setting your business can afford, and how to tell whether it went too far.

September 9, 2026

The Do Not Call list, explained

How to register your number, what the list stops within 31 days, the long list of calls it never covered, and what the same registry asks of a business.

September 9, 2026

What a robocall is, and which are legal

A robocall is any call that plays a recording. Some are legal, some need your written permission, and most of the volume is neither. Where the line sits.

September 9, 2026

What do-not-call rules ask of your business

If you call people who did not ask to hear from you, five obligations apply: scrub, an internal list, relationship windows, calling hours and records.

September 9, 2026

Why you get so many spam calls

Spam calling is cheap, and the phone number is the disposable part. Why the volume is what it is, why blocking never catches up, and what actually helps.

September 9, 2026

Why your business name shows up wrong

Your caller ID name is a record other carriers may or may not read. Who controls it, why displays disagree, and why no provider can guarantee the result.