too_long

More digits than any number in that plan

The number has more digits than the longest subscriber number of its plan, often two numbers run together or an extension typed inline.

appears in
reason
credits
Free. Invalid numbers never cost a credit.

What it means

E.164 caps numbers at 15 digits and each plan is shorter still. Extensions written as "ext 123" or "x123" are parsed out and returned in the extension field; digits appended without such a marker make the number too long.

What to do

Split off an extension with "ext", or check whether two numbers were pasted as one.

Example response

{
    "valid": false,
    "reason": "too_long",
    "e164": null,
    "country": null,
    "risk_score": null
}

Abbreviated: a real answer carries all 33 fields, listed in the validate-phone reference.

Related

markdown version: /docs/reasons/too_long.md