How far you can go with an ankle monitor depends on two things your court order sets: the restriction level (curfew, home detention, or home incarceration) and the geographic zones your supervising officer programs into the device. Within those limits, most people can travel to work, treatment, court, and other pre-approved destinations. Anything beyond them requires permission in advance.
The Three Restriction Levels
Federal courts and most state systems assign one of three tiers, and the tier decides how much of the day you can be away from your residence at all. The same tiers apply whether you’re on pretrial release, probation, or supervised release.
- Curfew. You must be at your approved residence during set hours, such as 8:00 p.m. to 6:00 a.m. Outside those hours you can move freely within the geographic limits of your supervision. This is the least restrictive tier.
- Home detention. You stay at your residence at all times except for pre-approved activities: employment, education, religious services, substance abuse or mental health treatment, attorney visits, court appearances, court-ordered obligations, and other activities your officer specifically approves.
- Home incarceration. You are confined to your residence 24 hours a day. The only exceptions are medical necessities and court appearances approved by the judge. Your officer cannot grant additional exceptions at this level.
The line between home detention and home incarceration matters in daily life. Under home detention, your probation officer can approve a trip to the grocery store or a family event. Under home incarceration, only a judge can authorize leaving for anything beyond a medical emergency or a court date.1United States Courts. Overview of Probation and Supervised Release Conditions – Chapter 3 Location Monitoring
Geographic Boundaries and Geofencing
Restriction level tells you when you can be out. Geographic limits tell you where you can go when you are. Under federal law, probationers and people on supervised release must remain within the jurisdiction of the court unless granted permission to leave.2Justia Law. 18 USC 3563 – Conditions of Probation In practice, that usually means the district or state where your case was handled. Similar authority applies to conditions of supervised release after a prison term, which must be reasonably related to the offense and impose no greater restriction on liberty than necessary.3Office of the Law Revision Counsel. 18 USC 3583 – Inclusion of a Term of Supervised Release After Imprisonment Pretrial release orders under 18 U.S.C. ยง 3142 can impose travel restrictions, curfews, and check-in requirements as well.4Office of the Law Revision Counsel. 18 USC 3142 – Release or Detention of a Defendant Pending Trial
If you’re wearing a GPS device, those limits are enforced through geofencing. Your officer programs two kinds of zones into the system. Inclusion zones define where you’re allowed to be: home, workplace, treatment facility. Exclusion zones mark places you’re prohibited from entering, such as a victim’s neighborhood or a school area in a sex offense case. Cross either kind of boundary and the system flags the violation in real time. Officers can respond within minutes.
So the range varies more than most people expect. Someone on curfew with a single county-wide restriction might have an entire county to move through during daytime hours. Someone on home detention might only have approved routes between residence, workplace, and treatment provider. Two people with “ankle monitors” can live very different lives.
What the Device Can Actually See
Two technologies are in use and they track very different things. A radio frequency (RF) monitor sends a signal from your ankle transmitter to a receiver in your home. It logs whether you’re inside detection range or not. It cannot tell anyone where you are once you leave. RF is the tool for verifying curfew compliance.5United States Courts. How Location Monitoring Works
A GPS monitor tracks continuously using satellite signals, cellular towers, and Wi-Fi. It follows you everywhere and logs your movements around the clock. Your officer can review the history and see exactly where you’ve been. GPS is the technology behind geofencing.5United States Courts. How Location Monitoring Works GPS devices need daily charging, usually one to two hours per session. A dead or low battery triggers a violation alert, so a consistent charging routine is not optional. The device itself is waterproof and shock-resistant, so normal showers and baths won’t damage it.
Getting Permission to Go Farther
Any travel outside your approved boundaries requires advance permission, and the process is more formal than most people expect. You generally submit a written request to your supervising officer with the reason for travel, the destination, the length of the trip, and where you’ll be staying.
Supporting documentation strengthens the request. An employer’s letter confirming a work trip, a medical appointment confirmation, or a funeral notice gives your officer something concrete to evaluate. Vague or recreational purposes have a much harder path to approval, especially early in supervision when you haven’t built a compliance record.
Interstate travel is more complicated. Moving supervision to another state, even temporarily, can involve the Interstate Compact for Adult Offender Supervision, which coordinates transfers between states. A weekend trip to visit family across state lines may only require your officer’s approval. An extended stay could trigger a formal transfer process. Start that conversation well before any planned travel date.
Compliance history matters. Officers have discretion to approve or deny, and someone with months of clean monitoring data is far more likely to get a yes than someone who triggered an alert two weeks ago.
One note on scope: if you’re in removal proceedings under U.S. Immigration and Customs Enforcement’s Alternatives to Detention program, the rules described here don’t govern your case. In that program, leaving the state without prior ICE permission counts as a program violation, and the approval process runs through ICE rather than a probation office.
What Crossing the Line Costs
Violations fall into a few categories, and not all of them involve deliberately going somewhere you shouldn’t.
- Boundary breach. Crossing a geofence or leaving your residence during restricted hours. This is the most straightforward violation and generates an immediate alert.
- Dead battery. Letting the GPS monitor lose power triggers an alert because the system can no longer verify your location. Officers treat this as a compliance failure even if you were home when it happened.
- Tampering. Attempting to remove, damage, or shield the device. Many jurisdictions treat tampering as a separate criminal offense on top of the supervision consequences.
- Missed check-ins. Failing to report as scheduled or answer when contacted.
- New criminal conduct. An arrest or new charge while on monitoring.
Supervising authorities generally use graduated responses. A first minor violation, such as a brief low-battery alert or coming home a few minutes past curfew, might draw a verbal warning or a required meeting with your officer. Repeated minor violations or one serious violation can lead to tighter restrictions: a stricter curfew, more frequent check-ins, or an upgrade from curfew to home detention.
Severe or persistent violations lead to a revocation hearing. At that hearing you have the right to written notice of the alleged violations and the right to be represented by an attorney. If the court finds the violations credible, consequences can include extended supervision, additional conditions, or incarceration. For someone on probation, revocation lets the court impose the original sentence that was suspended. For someone on supervised release, the court can order a return to prison for a portion of the remaining term.3Office of the Law Revision Counsel. 18 USC 3583 – Inclusion of a Term of Supervised Release After Imprisonment
False alerts do happen. Signal loss, skin conditions affecting sensors, and strap loosening after weight changes can all generate alerts that look like tampering. If one hits you, contact your supervising officer immediately and document the circumstances. That record is what lets your officer classify the event correctly rather than treat it as a boundary problem.