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When to Call 911 vs. the Non-Emergency Number, and How to Help Responders Find You

By Guardian Angel DIY · Updated October 27, 2026 · 9 min read

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Knowing when to call, and what to say, is a skill. Many people hesitate because they are not sure whether something is "serious enough," or they call and then struggle to give useful details. Others do everything right and still lose precious minutes because responders cannot find the house. This guide covers three things: how to decide between 911 and the non-emergency line, how to describe what you see in a way that helps, and how to make your home easy to find in the dark.

911, the non-emergency line, or an online report?

The rule most dispatchers give is simple: if there is a danger to life or safety, or a crime is happening right now, call 911. If it is not urgent, use the non-emergency number. If you cannot tell, call 911. Dispatchers would rather sort it out than have you wait.

Rules differ by place. Some departments take reports online, and some use different numbers for different towns. Look up your department's non-emergency number and online reporting page now, and save them in your phone, so you are not searching in a hurry.

What counts as suspicious

The best definition is about what a person is doing, not what they look like. Police and community-safety programs commonly teach this, and it is the fairest and the most useful approach.

Behaviors worth noting include:

• Trying door handles or car doors along a street.
• Looking into windows, or going around the side or back of a house.
• Watching a house for a long time, or taking notes or photos of it with no apparent reason.
• Knocking, then going to the back, when no one answers.
• Carrying items out of a house or garage that is empty or whose owners are away.
• A vehicle circling the area repeatedly, or parked with someone inside, watching.
• Removing packages from a porch that are not theirs.
• Forced entry sounds, such as breaking glass or kicking at a door.

Things that are usually not suspicious, on their own:

• A delivery driver, a utility worker or a person with a visible, legitimate job.
• Someone who is lost, or asking for directions.
• A person walking, jogging or waiting for a ride.
• Children or teenagers out in the neighborhood.
• Someone who looks unfamiliar to you.

Being a stranger is not a reason to call. Doing something that looks like an attempt to get into a home or car is. If you feel unsafe, trust that, and call. Just be able to say what you saw.

What to note

You do not need to memorize a checklist. You need to be able to answer a few simple questions, in whatever order the dispatcher asks them. Keep this list in a note on your phone.

1. Where. The address, or the nearest address, and the cross street.
2. What is happening. The behavior, in plain words: "A man is trying the doors on parked cars."
3. How many people.
4. What they look like. Height and build, age range, clothing, and anything distinctive, as best you can.
5. Which way they went, and on foot or by vehicle.
6. The vehicle. Color, type and any part of the plate. Even a partial plate or a distinctive mark, such as a dent or sticker, helps.
7. When. The time you noticed it, and how long it lasted.
8. Whether anyone is hurt, or in danger.

Do not follow, approach or confront anyone to get these details. A safe view from inside, or a camera, is enough. A partial description is better than none.

What to say, step by step

1. Say your location first. "I am at 14 Oak Street." Then the problem. Phones may give dispatchers an approximate location, but it can be off by a lot, and it is not a street address.
2. Describe what is happening in one sentence.
3. Answer the questions in order. The dispatcher is typing as you talk. A short, clear answer helps more than a long story.
4. Stay on the line until they say you can hang up.
5. If you cannot talk, leave the line open, or text if your area supports it. Text-to-911 is not available everywhere, so find out whether yours is.
6. Ask for a report number, if one is offered, and write it down.

If someone is in your home, the steps are different: retreat first, then call. Our guide to what to do if someone breaks in covers that in detail.

Keep a record, and save the footage

If you report something, a small amount of record-keeping helps police and helps you.

• Write it down. A short note with the date, time and what you saw. Memory fades fast.
• Save camera clips. Many doorbell and security cameras delete video after a set period, which can be days. Download the clip as soon as you can, and give it to police if they ask. Our camera guide covers storage.
• Do not edit or share it widely. Give the original to police. Share with neighbors only as a caution, without naming or accusing anyone.
• Tell your neighbors. If you have a group text, a short note helps others watch and save their own clips. See our guide to building a neighbor network.
• Follow up. If you get a report number, use it if you have new information.

Make your house easy to find

Once help is on the way, the next problem is finding you. Responders drive down streets at night, often with only a number to go on. A house number that is small, dark, hidden by a bush or not on the street side can cost minutes. It is also the cheapest fix in this whole series.

• Make the numbers large. Many fire codes use a minimum height of around four inches, and some places require more. Check your local rules, and go larger if you can.
• Choose contrast and reflection. Light numbers on a dark background, or the reverse, and a reflective finish that catches headlights.
• Put them where they can be seen from the street, in both directions, and not behind a tree, a porch post or a car.
• Mark the mailbox or the curb too. If the house is set back, or at the end of a long driveway, put a number at the road.
• Light them. A porch light or a fixture that shines on the number helps at night.
• Use the same number everywhere. A unit or apartment number needs to be clear on the building and at the door.

Two simple options cover most homes. Reflective stickers are the cheapest, and a mounted address sign lasts longer and reads from farther.

Other things that help responders

• Turn on the porch and driveway lights when you call, if it is safe to do so.
• Clear the path. Move a car or a bin that blocks the driveway or the walk, and trim a bush that hides the door.
• Tell the dispatcher about access. Gate codes, locked doors, a long driveway, and a dog that is loose.
• Secure pets in a room or a crate if you can do so safely.
• In a medical emergency, unlock the door and turn on lights, if you are able, so responders can come in. If you are sheltering from an intruder, do not unlock until the dispatcher tells you police are at the door.
• Check the lighting at the front. Our lighting guide explains which kind to use.

What it costs: a simple plan

Common mistakes to avoid

• Waiting to be certain. If you are unsure about danger, call 911 and let the dispatcher decide.
• Reporting how someone looks. Report what they are doing.
• Searching for the non-emergency number in a hurry. Save it now.
• Relying on your phone's location. Give the address, always.
• Confronting or following. Observe from a safe place.
• Hiding the house number. Check it from the street at night.

Frequently asked questions