Traveling abroad?
Call hotels, airlines, and family without costly roaming.
Temporary US number with minutes at a reasonable price. Keep your local SIM for internet, use Callzo for calling anywhere in the world.
Before Travel
Call hotels, airlines, or Airbnb abroad to confirm bookings before you leave
At Airport
Inform family you've arrived safely without expensive roaming charges
While Traveling
Handle emergencies or urgent calls anywhere with just internet
International calling is broken
You need to make calls while traveling, but every option is expensive or complicated.
Expensive international calls
Need to call hotels or airlines abroad? International rates are sky-high.
Roaming charges nightmare
Roaming drains your wallet. Local SIMs just for calling? Too much hassle.
Complex solutions
You'll buy a local SIM for internet anyway — why not use it for calling?
Callzo gives you a temporary US number — use your internet for calls worldwide
Your calling companion throughout your journey
From planning to landing to exploring — Callzo is with you every step
Before Traveling
Call your hotel, airline, or Airbnb abroad to confirm reservations, ask questions, or make special requests — all before you leave home
At the Airport
Just landed? Call family or contacts to let them know you've arrived safely. No roaming charges, just your internet connection
While Traveling
Handle emergencies or urgent situations. Call local services, embassies, or anyone you need — anywhere in the world with just internet
Why Callzo feels different
Whether you're planning your trip or already traveling, other solutions make calling stressful
Callzo removes the thinking
Callzo is built to be simple and predictable.
Most international calling tools
That's too much thinking — especially while traveling.
Why travelers choose Callzo
- ×Expensive roaming charges
- ×Complex setup process
- ×Need physical SIM cards
- ×Hidden fees and surprises
- Reasonable, transparent pricing
- Works in your browser instantly
- Just need internet connection
- Pay only for what you use
Simple. Affordable. Reliable.
Simple pricing. No tricks.
One price. Total peace of mind.
Your International Browser SIM
Perfect for trying once. Keep it only if you need it.
Try first. Top up only if required.
Most travelers only need a few minutes.
If you run out:
Add more minutes instantly
Keep using the same number
No re-setup, no friction
You're always in control.
Perfect for every travel moment
Real situations where Callzo becomes your essential travel companion
Pre-travel confirmations
Call hotels, Airbnb hosts, or airlines abroad before your trip to confirm bookings and ask important questions
Learn moreAirport arrivals
Let family know you've landed safely or coordinate pickups — all with just your internet connection
Learn moreLocal services abroad
Call restaurants for reservations, tour operators, or local businesses while traveling
Stay connected with home
Regular check-ins with family and friends back home without expensive roaming charges
Learn moreEmergency situations
Call embassies, banks, insurance companies, or medical services when you need help urgently
Frequently asked questions
Everything you need to know about Callzo
No. Callzo is a backup calling solution — like a temporary SIM for important moments.
Yes. Callzo currently supports outgoing calls only to keep pricing simple and reliable.
Yes. Callzo works over Wi-Fi or mobile data using VoIP technology.
No SIM, no eSIM. Everything works directly from your browser.
Your number and minutes are valid for 15 days, then they expire automatically.
Yes. You can add more minutes anytime if needed.
Travel boldly.
Call when it matters.
Join travelers who carry a browser SIM — just in case.
For peace-of-mind calling wherever your adventures take you