Get a toll-free or local number, forward calls to your mobile, team, or AI agent, and get every voicemail by email. Text from the same number, and add WhatsApp, Slack, and other integrations when you need them.
No per-user pricing · No long-term contracts · 24/7 human support
Pick a new local or toll-free number, or bring the number your customers already know. Add more numbers anytime.
How to choose a business number →Add numbers for a second location or a campaign. They share the same extensions, inbox, and settings.
Follow your number’s carrier text-messaging registration, so you know exactly when business texting is live.
Type your greeting and choose a voice, or record it yourself. Callers press a menu option or dial a person’s extension, and each extension rings the phones you choose.
What callers hear first during business hours: your welcome and menu options.
A different message for evenings, weekends, and closed days.
Sales, Support, and Billing each ring the right mobiles.
Set dates ahead of time, and the right greeting plays automatically.
Type the words and choose a voice. Saving renders the greeting once as a recording.
Play the greeting before callers hear it, and regenerate until it sounds right.
Record a greeting yourself, or upload audio you already have.
Change the words anytime. Saving renders a fresh recording.
Give each person an extension, like Bob at 101, that callers can dial from the menu.
Forward each extension to your mobile, everyone on your team, or your own AI agent. Phones ring one after another or all at once, and unanswered calls go to your business voicemail.
Forward to mobiles, an existing business phone, or a landline.
With call announce, you hear which extension the call is for and press 1 to accept. The other phones stop ringing. How call forwarding works ›
During business hours, calls ring your team. After hours, they go to business voicemail or an on‑call destination. How after‑hours routing works ›
Ring teammates in the mobile app, with business caller ID.
Register a desk phone to an extension: plug into ethernet and it rings.
Already use an AI voice agent from Vapi or another provider? Send an extension to it, or let it cover after hours. How AI agent connections work ›
Every voicemail is recorded, transcribed, and emailed to you with an AI summary. You can also get a notification in Slack.
Unanswered calls go to Numberline business voicemail, with your business greeting.
Every voicemail is emailed to the addresses you choose, with the AI summary and transcript in the body. How voicemail transcription works ›
Get voicemail notifications in the channel you choose. Open Numberline to read the message and call back. How Slack notifications work ›
Every answered, outgoing, and missed call on the business number, in one list.
See who you missed, with the voicemail and transcript on the same entry.
Every voicemail comes with a short AI summary of what the caller wants and when they need a callback.
Find any call or voicemail by name, number, or what was said.
The recording arrives as an MP3 attachment you can play, forward, or file anywhere.
Sales voicemails go to different people than Support. Each extension has its own recipients.
Call out from the Numberline app with your business caller ID, answer texts & WhatsApp in one inbox, and connect Slack or AI agents.
The Numberline app puts your business line on the phone you already carry, iPhone or Android. Place a call in the app, and customers see your business number.
How to call from an iPhone with your business number →Calls, texts, voicemails, and settings on the phone already in your pocket.
Customers see your business number. Calls from your phone’s regular dialer still use your personal number.
Return a voicemail or text from its transcript, straight from the business number.
Customers text or WhatsApp your business number, and every conversation lands in one shared inbox. We file the carrier registration for you, and sending starts after carrier approval.
Learn how business texting and WhatsApp work.
Texts and WhatsApp messages land in one inbox the whole team can see.
Give each conversation an owner, and everyone sees who has it.
Replies go back over the channel the customer used, from the business number.
Get notifications in Slack, add WhatsApp to the shared inbox, log calls and texts in your CRM, and send events to your own software with webhooks. Already use an AI voice agent? Connect it and choose which calls it answers.
Get notifications for new texts, missed calls, and voicemails in the channels your team already watches. How Slack notifications work →
Customers message your business number on WhatsApp, and conversations appear next to texts in the shared inbox. How WhatsApp works →
Already use an AI voice agent, like Vapi? Connect your agent and assign it to an extension, to calls your team cannot answer, or to after hours. How connected AI agents work →
An agent you host on another platform, added as a custom destination with its SIP address.
Connect supported tools from our integrations store. Ask us about your CRM.
Send call and message events to your own software in real time.
Numberline manages the business number, extensions, and routing. Agents that answer calls come from your AI provider, and you choose which calls each one takes.
Your business line on the phone you carry.
Get my number
