Mobile number

Validates an Indian mobile number: exactly 10 digits, starting with 6, 7, 8 or 9. The +91 country code, a leading 91, a leading 0, spaces and dashes are all accepted and stripped before checking — the result’s normalized field is always the plain 10-digit number.

Rules

Rule	Detail
Length	10 digits after removing `+91` / `91` / `0` prefix
First digit	6, 7, 8 or 9 (allocated mobile series in India)
Characters	Digits only, ignoring spaces and `-`
Checksum	None — mobile numbers have no checksum digit

Usage

import { validateMobile } from 'indycheck';

validateMobile('9876543210');
// { ok: true, code: 'VALID', normalized: '9876543210',
//   parsed: { normalized: '9876543210' } }

validateMobile('+91 98765 43210'); // ok: true, normalized: '9876543210'
validateMobile('919876543210');    // ok: true, normalized: '9876543210'
validateMobile('09876543210');     // ok: true, normalized: '9876543210'

from indycheck import validate_mobile

validate_mobile("9876543210").ok  # True

use indycheck::validate_mobile;

let r = validate_mobile("9876543210");
assert!(r.ok);

Examples

Input	Result	Code
`9876543210`	✅ Valid	`VALID`
`+91 98765 43210`	✅ Valid	`VALID`
`919876543210`	✅ Valid	`VALID`
`5123456789`	❌ Invalid — starts with 5	`INVALID_FIRST_DIGIT`
`987654321`	❌ Invalid — only 9 digits, not a valid 10-digit number	`INVALID_FORMAT`
`98765 4321a`	❌ Invalid — letter inside	`INVALID_FORMAT`
(empty)	❌ Invalid	`EMPTY`

Error codes

Code	Means
`EMPTY`	Nothing was passed in
`INVALID_FORMAT`	Not 10 digits after stripping the prefix, or non-digit characters (other than spaces, `-`, `+91`)
`INVALID_FIRST_DIGIT`	First digit is not 6, 7, 8 or 9

The core never emits INVALID_LENGTH for mobiles: any wrong-length or non-digit input fails normalisation and is reported as INVALID_FORMAT.

Parsed output

On success, parsed contains:

{ "normalized": "9876543210" }

Store normalized (the 10-digit number) in your database, not the raw input — that way +91 98765 43210 and 9876543210 dedupe to the same user.