Indonesia phone number validator
How the phone number format works
- Format
- Indonesia phone number in national or international (+62) format
- Example
- +62812345678
Things to watch for
- Accepts national or international (E.164, e.g. +62...) format
- Validated with Google's libphonenumber; confirms the number is possible/valid for this country, not that it is currently assigned or reachable
^[+]?[0-9 ()\-]{6,}$An Indonesian mobile number starts with 08 and commonly runs 10 to 12 digits total in national form — a wider length range than this validator handles for most countries, a legacy of multiple mobile operators issuing numbers of different lengths since Indonesia’s mobile boom. A number like 0812 3456 789 has its leading 0 dropped for international use; the operator prefix (0811, 0812, 0813, and more) sits right where that dropped zero used to be.
How this validator works
Enter the number in local form (0812345 6789) or full international form (+628123456789); the check runs through Google’s libphonenumber, confirming the operator prefix and a length that falls within Indonesia’s valid mobile range — entirely in your browser, nothing sent anywhere. Because that valid range is unusually wide, the validator leans more on the prefix (08xx) and less on a single fixed digit count than tighter numbering plans like Denmark’s or Hong Kong’s.
What a pass doesn’t tell you
A pass means the number’s prefix and length fall within a real Indonesian mobile pattern — it doesn’t confirm the SIM is currently active. Indonesia’s prepaid mobile market turns over numbers quickly, so a well-formed number is easily reassigned or dormant.
Scope: use this to catch a wrong operator prefix, a length outside the valid range, or a leftover 0 after +62 — not as confirmation the number is currently reachable.
Content last reviewed 2026-07-07.
phone number FAQ
How many digits does an Indonesian mobile number have?
Commonly 10 to 12 digits in national form depending on the operator prefix — a wider range than most countries, since Indonesia's mobile numbers were issued by several operators with different length conventions over time.
What happens to the leading 0 in an Indonesian mobile number for +62?
It's dropped — a number written as 0812 3456 789 in national form has that 0 removed internationally, with the 08xx operator prefix's remaining digits following the country code directly.
Does a valid Indonesian number check mean the SIM is active?
No. It only confirms the prefix and length match a real Indonesian mobile pattern — it can't confirm the SIM is currently active, particularly relevant given how quickly Indonesia's prepaid mobile numbers get reassigned.