How to find which prison someone is in
Just sentenced, or suddenly moved? Here is how to track someone down for free, using the official route.
The official way: Find a Prisoner (free)
The prison service runs a free service on GOV.UK called Find a Prisoner. You need:
- Their full name, plus any other names they might be recorded under
- Their date of birth, or rough age
- Your own name, date of birth and address
A reply normally comes within about 3 working days. Two things catch people out. First, the prisoner has to agree to their location being shared with you. Second, the name has to match, so include old names or nicknames they might be booked under. A "no information" reply often means no consent, not no record.
Faster ways
- The court (same day): the custody office at the court can often say which prison the van was going to.
- Their solicitor gets told where their client is and can usually confirm quickly.
- Wait for the call. Most people manage a first call within 1 to 3 days. See the first 48 hours.
When they are moved without warning
You usually find out about a move when a call comes from a new prison, or when the calls suddenly stop. After a move it takes a few days for phone credit, approved numbers and property to catch up, so a short silence is normal. If you had a visit booked, ring the old prison's visits line. Booked visits do not move with them.
If a week passes with no contact, use Find a Prisoner again, or ring the last known prison and ask if they are still there. They will usually confirm a simple yes or no to close family.
Once you know where they are
Get their prisoner number as soon as you can. Everything needs it: money, visits, emails. Then send a little money on GOV.UK, get your phone number approved, and if you are wondering how long they will actually be inside, try the release date tool.
Common questions
Is there a free way to find what prison someone is in?
Yes. The official Find a Prisoner service on GOV.UK is free. You fill in a short form with their full name and date of birth, plus your own details. Ignore websites that charge for a "prisoner search". They just use the same free service, or worse.
How long does Find a Prisoner take?
Usually about 3 working days. The prisoner is asked if they agree to their location being shared. If they say no, or no match is found, you get a letter saying no information can be given.
Why were they moved without anyone telling me?
Prisons never announce moves in advance, for security. And with prisons as full as they are, sudden overnight moves are common. The prisoner is expected to tell you themselves, but their phone credit and approved numbers do not always follow straight away. A few quiet days after a move is normal.
Can I find out their release date this way?
No. Release dates are only shared by the prisoner themselves. If you know the sentence, you can estimate it with our release date tool.
Want to know when the rules change?
The release rules change in Autumn 2026. We will email you when it happens. Otherwise just a short update every few months. No spam, ever. Stop any time.
Thanks. Please check your inbox and click the link to confirm. We will only write when it matters.
Sorry, something went wrong. Please try again, or email us.