India phone number validator
How the phone number format works
- Format
- India phone number in national or international (+91) format
- Example
- +918123456789
Things to watch for
- Accepts national or international (E.164, e.g. +91...) 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 Indian mobile number is a flat 10 digits, always starting with 6, 7, 8, or 9 — a numbering scheme TRAI standardized after India ran out of capacity in older ranges. Unlike a French or Irish mobile, it carries no trunk 0 to strip: 9876543210 becomes +919876543210 by simple addition, nothing dropped, nothing reshuffled. Landlines are the exception, keeping a regional STD code (011 Delhi, 022 Mumbai) with a leading 0 that is dropped for +91.
How this validator works
Type the 10 digits alone (9876543210) or with the country code (+919876543210); this tool checks the length and leading-digit range against India’s real mobile numbering plan using Google’s libphonenumber, entirely client-side. Because there’s no trunk prefix on mobile numbers, the most common failure isn’t a leftover 0 — it’s a number starting with 0-5 (invalid for mobile) or one digit short or long, since 10 is a strict count.
What a pass doesn’t tell you
A pass confirms the 10 digits match a real Indian mobile range — it doesn’t confirm the SIM is active or currently held by anyone in particular. India’s mobile market recycles disconnected prepaid numbers after a set inactivity window, so a correctly-shaped number can already belong to someone new.
Scope: catch a wrong leading digit, a missing digit, or an extra 91 before an Indian number reaches a signup form or OTP send — not proof it’s reachable right now.
Content last reviewed 2026-07-07.
phone number FAQ
Why doesn't an Indian mobile number lose a digit when written as +91?
Unlike most countries, an Indian mobile number never carries a trunk 0 to begin with — it's a flat 10 digits starting 6, 7, 8, or 9. Converting to international form is pure addition: +91 goes in front of the same 10 digits unchanged, e.g. 9876543210 becomes +919876543210.
Why do some Indian numbers seem to have an 11th digit or a leading 0?
That 0 belongs to landline STD dialling, not the mobile number itself — a Delhi landline is dialled as 011-XXXXXXXX domestically, with the 0 dropped for +91. Mobile numbers don't have this prefix at all, so a mobile number with an extra leading 0 or 91 repeated is typically a typo.
Does a valid check confirm an Indian number is active on a network?
No. It confirms the 10 digits start with a valid mobile range (6-9) recognized under India's numbering plan — it can't confirm the SIM is currently active, which matters given how quickly India's prepaid mobile numbers get recycled.