Find the Twilio numbers you pay for and never use

Which Twilio actions cost money?

Five of the ten.

Buying a number charges the account immediately and adds a recurring fee. Releasing one is irreversible: the number goes back to the pool and somebody else can take it, which is a catastrophe if it was printed on packaging. Sending an SMS or placing a call costs per message and arrives on a person's phone, where it cannot be recalled. Creating a messaging service sits on the same list.

Each one pauses on an approval card showing exactly what is about to happen. You approve once, for the session, always, or never. If a standing approval is already in place, the call still runs behind a short countdown you can cancel, and Ask Always in Settings → AI permissions removes the defaults so everything, reads included, waits for you.

One recipient at a time, one approval each

The send tool takes one from number, one recipient and one body.

A hundred texts is a hundred separate calls with a hundred approval cards, which is a structural limit rather than a policy anybody can prompt around. It keeps this a precise instrument: the one message to the customer whose delivery failed, drafted from the order and the tracking record, shown to you before it goes.

Bulk messaging with opt-out handling, sender pools and rate limiting belongs in Twilio's own messaging infrastructure, where that bookkeeping lives. Nothing on this page is a route to unsolicited bulk SMS.

• "List every number on the account with its monthly cost, and which of them sent anything in the last ninety days."
• "Draft an SMS to this customer about the failed delivery and show it to me before sending."

Reading the log is most of the job

Messages can be listed by recipient, by sender, or across a date range, up to a thousand a page with a token for the next one, and a single message can be pulled by its identifier. That answers what we sent this person, whether their reply arrived, and how many messages went out on the day the bill spiked. It is data extraction against your own telephony log.

The account tool returns the balance and currency alongside the account status, which is the check to run before anything expensive rather than after. A companion that reads the balance, the number inventory and ninety days of message history tells you which numbers are costing you money and returning nothing. That is the kind of operations housekeeping that never gets scheduled because it was never anyone’s job.

What about voice?

One call tool, and it takes a from number, a recipient, and exactly one of three things: text for Twilio to speak, raw TwiML for a multi-step call, or a URL pointing at your own TwiML endpoint. An automated spoken alert to an on-call phone needs only the first.

It sits behind the same approval card as everything else. Keep calls narrow: alerts to people who agreed to be called, at numbers they gave you, short enough to be understood by someone who just woke up.

Frequently asked questions