Understanding international dialing codes is the first step to reaching anyone abroad without failed calls, wrong numbers, or surprise carrier bills. Every country has an exit code (how you leave the domestic network), every destination has a country code (how the global system routes your call), and modern VoIP platforms expect numbers in E.164 format — a single standard that eliminates guesswork once you learn the pattern.
Ringvoo users dial worldwide from the browser using E.164 every day. This guide explains exit codes by region, how country codes map to destinations, why the plus sign matters on smartphones, common formatting mistakes, and how browser calling simplifies international dialing compared to memorizing different prefixes for every country you call.
Key Takeaways
- Exit code + country code + national number is the universal pattern — from most countries the exit code is
00; from the USA and Canada it is011. - E.164 format writes the full number as
+followed by country code and national digits with no spaces, trunk zeros, or secondary prefixes — e.g.+447911123456. - Smartphones replace exit codes with
+— hold0on most keypads to insert the plus sign, which automatically uses the correct exit code for your network. - Browse the full code list on Ringvoo's country codes reference and cross-check corridor guides like call India from UK.
- Browser VoIP dialers accept E.164 directly — see what is browser calling for why this beats carrier rate cards for most expats.
Exit Codes: How You Leave Your Country's Network
Before your call reaches another country, your local network needs to know you intend an international route. That signal is the international access code — also called the exit code or IDD prefix.
Common exit codes by region
| Country / region | Exit code | Example call to UK (+44) |
|---|---|---|
| India, UK, EU (most), UAE, Australia | 00 | 00 44 7911 123456 |
| USA, Canada | 011 | 011 44 7911 123456 |
| Japan | 010 | 010 44 7911 123456 |
| Brazil | 00 (mobile varies) | 00 44 7911 123456 |
| Russia, Kazakhstan | 810 (legacy) / 8~10 | Check carrier guidance |
From a mobile phone, you rarely dial the exit code manually. Press and hold 0 (or tap the + key) to enter plus-sign dialing — your carrier translates + into the correct exit sequence automatically.
From a landline, you typically dial the exit code explicitly. Office PBX systems may use a trunk prefix like 9 or 0 before the exit code — e.g. 9 00 44... from a corporate desk phone.
Why exit codes differ
Exit codes are a legacy of national telephone administrations. Each country assigned its own prefix before global standards converged. E.164 and smartphone plus-sign dialing reduce the burden, but landline users and older systems still encounter exit codes daily.
Country Codes: Routing Your Call to the Right Nation
After the exit code, you dial the country calling code — one to three digits defined by ITU-T E.164 that identify the destination country or shared numbering plan.
Frequently dialed country codes
| Destination | Country code | E.164 example |
|---|---|---|
| India | +91 | +919876543210 |
| United Kingdom | +44 | +447911123456 |
| United States / Canada | +1 | +14155551234 |
| UAE | +971 | +971501234567 |
| Pakistan | +92 | +923001234567 |
| Germany | +49 | +491701234567 |
| Philippines | +63 | +639171234567 |
| Nigeria | +234 | +2348012345678 |
Some country codes are shared: +1 covers the USA, Canada, and several Caribbean territories under NANP. +7 covers Russia and Kazakhstan. Always include the full national number after the country code — area codes matter.
Ringvoo maintains a searchable reference at country codes with dialing notes for hundreds of destinations.
E.164 Format: The Standard Every VoIP Dialer Uses
E.164 is the international public telecommunication numbering plan. It defines how phone numbers are stored, routed, and displayed globally. Browser VoIP platforms like Ringvoo expect numbers in E.164 because it is unambiguous — no exit codes, no trunk prefixes, no formatting debates.
E.164 rules
- Start with
+(represents the international prefix). - Add the country code (1–3 digits).
- Add the national significant number — the subscriber number without trunk zeros or domestic prefixes.
- Maximum 15 digits total after the plus sign.
India mobile: Domestic 98765 43210 → E.164 +919876543210
UK mobile: Domestic 07911 123456 → E.164 +447911123456 (drop leading 0)
UAE mobile: Domestic 050 123 4567 → E.164 +971501234567 (drop leading 0)
What to strip when converting
| Domestic format element | Action for E.164 |
|---|---|
| Leading trunk zero (UK, India, UAE, etc.) | Remove |
| Domestic long-distance prefix (0, 9, etc.) | Remove |
| Exit code (00, 011) | Replace with + |
| Parentheses and dashes | Remove |
| Extension (x1234) | Dial main number first; extensions vary by PBX |
Getting E.164 wrong is the number one cause of failed international calls. A single extra zero after the country code sends your call nowhere.
Step-by-Step: Build Any International Number
Follow this workflow regardless of destination:
- Find the country code — use country codes or search "country code for [destination]."
- Obtain the national number as a local would write it — including area or mobile prefix.
- Remove trunk zeros — if the domestic number starts with 0, drop it before the country code.
- Prepend + and country code — concatenate without spaces for the dialer.
- Verify digit count — compare against known lengths for that country (India mobiles: 10 digits after +91; UK mobiles: 10 after +44).
Worked example — call India from UK:
- Local Indian mobile:
098765 43210 - Country code: 91
- E.164:
+919876543210 - From UK landline:
00 91 98765 43210
See call India from UK for corridor-specific tips.
Worked example — call UK from USA:
- Local UK mobile:
07911 123456 - Country code: 44
- E.164:
+447911123456 - From US landline:
011 44 7911 123456
Mobile vs Landline vs Browser: Which Prefix Do You Use?
| Calling from | Typical method | Format |
|---|---|---|
| Mobile (any country) | Plus-sign dialing | +CC NNNNNNNNNN |
| Landline (India) | Exit code 00 | 00 CC NNNNNNNNNN |
| Landline (USA) | Exit code 011 | 011 CC NNNNNNNNNN |
| Browser VoIP (Ringvoo) | E.164 only | +CC NNNNNNNNNN |
| Corporate PBX | Trunk + exit + CC | 9 00 44... (varies) |
Browser calling eliminates exit-code memorization entirely. You enter E.164; the platform handles routing. That is why expats increasingly prefer what is browser calling over carrier international plans — one format works for every destination.
Dial international numbers from your browser
Ringvoo accepts E.164 numbers worldwide from a browser tab — no exit code lookup, no app install. Check live rates by destination, add credits, and dial any published phone number at transparent per-minute pricing.
Try Ringvoo free — call from your browser · Browse country codes
Common Dialing Mistakes and How to Fix Them
Keeping the trunk zero: Dialing +4407911123456 fails — UK numbers lose the leading 0 internationally. Correct: +447911123456.
Double country code: Stacking 00 44 44... or +44 44... routes incorrectly. One country code only.
Wrong exit code from USA: Using 00 instead of 011 from a US landline fails. Mobile plus-sign dialing avoids this.
NANP confusion: Calling Canada from the USA uses +1 — not a separate country code. See corridor guides for border-region specifics.
Formatting for humans vs machines: Spaces and dashes help readability (+91 98765 43210) but some dialers prefer no spaces. Ringvoo accepts standard E.164 with or without spacing.
Toll-free numbers abroad: 800/888/877 numbers often use separate international routing or fail entirely from overseas. Look for a geographic or direct international line. See call landlines internationally for institutional numbers.
Special Cases: Shared Codes, Short Codes, and Emergency Numbers
Shared country codes: NANP (+1) spans multiple countries. Always dial the full ten-digit national number including area code. A Toronto number and a New York number both start with +1 but differ in area code.
Short codes and premium numbers: Domestic short codes (bank SMS numbers, two-step auth short codes) are not reachable via international dialing. You need the full PSTN number published for international callers.
Emergency numbers (911, 999, 112): Never use international exit codes to reach emergency services abroad. Dial the local emergency number from a local line, or contact your embassy if overseas.
Satellite and special services: Some maritime and aviation numbers use non-standard prefixes. Standard E.164 rules still apply where ITU registration exists.
For cost optimization across destinations, read cheapest way to call abroad.
Frequently Asked Questions
What is an international dialing code?
It usually refers to either the exit code (leaving your country, e.g. 00 or 011) or the country code (identifying the destination, e.g. +91 for India). Together they route calls across borders.
What is E.164 format?
E.164 is the global standard for phone numbers: a plus sign, country code, and national number without trunk zeros — maximum 15 digits. Example: +447911123456.
How do I dial internationally from my mobile?
Enter +, then the country code, then the national number without leading zero. Example for India: +919876543210.
What is the exit code from the USA?
011 is the standard international access code from US landlines. Mobile phones use + instead, which triggers the equivalent routing automatically.
Where can I find all country calling codes?
Ringvoo's country codes page lists codes and dialing notes for hundreds of destinations.
Why does my international call fail even with the right code?
Common causes: an extra trunk zero, wrong digit count, blocked destination on your carrier, or a toll-free number that does not accept foreign origination. Verify E.164 format first.
Can I dial any country code from Ringvoo?
Ringvoo supports E.164 dialing to destinations where PSTN termination is available. Check live rates for your target country.
Do I need a SIM card to use international dialing codes?
No. Browser VoIP over Wi-Fi uses E.164 without a cellular plan — see international calls without a SIM.
Master International Dialing Today
International dialing codes follow a simple pattern once you separate exit codes (how you leave) from country codes (where you arrive) and standardize on E.164 for VoIP. Ringvoo lets you dial any supported destination from the browser with one format — no 00 vs 011 confusion, no carrier bundle required.
Browse country codes, check live rates, and create your free account. For corridor-specific walkthroughs, start with call India from UK and what is browser calling.