Overview

The Blocked Numbers tool lets you control which phone numbers can reach your NUACOM account and which numbers your team is allowed to call out to. You can block a number in one direction only (inbound or outbound) or both, and you can leave a note on each entry, so your team knows why a number was blocked.

Common reasons to use this tool include:

• Stopping spam, robocalls, and scam calls from reaching your agents
• Blocking prank or nuisance callers
• Preventing your team from accidentally dialing out to competitors, marketing lists, or numbers that shouldn't be called
• Silencing anonymous/withheld-number calls, or explicitly allowing them if your business needs to receive them

You'll find this tool at Tools > Blocked Numbers in the left-hand navigation menu.

Understanding the Blocked Numbers List

The Blocked Numbers table shows every number you've configured, along with its current call-blocking status.

Each direction (Inbound/Outbound) can be set independently, so you can, for example, block a number from calling in while still allowing your team to call it back if needed.

Managing Anonymous Calls

At the top of the list, the Anonymous calls row lets you decide how to handle calls where no caller ID is presented:

• Allowed (default) — anonymous calls ring through normally
• Blocked — anonymous calls are rejected before they reach any user or queue

This is useful if your business receives a high volume of withheld-number spam and doesn't need to accept anonymous calls at all.

Blocking a New Number

1. Go to Tools > Blocked Numbers.
2. Click + Add number in the top-right corner.
3. Enter the phone number you want to block, selecting the country code.
4. Choose whether to block it for Inbound, Outbound, or both directions.
5. (Optional) Add a note explaining why the number is blocked — this helps your team and shows up in the Notes column.
6. Save the entry. It will now appear in your Blocked Numbers list.

Once saved, blocked numbers calling in will typically hear a rejection tone or be routed to voicemail/rejection message depending on your account configuration, and outbound calls to blocked numbers will be prevented from connecting.

Editing or Removing a Blocked Number

1. Locate the number in the list (use the Search bar if the list is long).
2. Click the Options menu (⋮) at the end of its row.
3. Choose to edit the entry (e.g. to flip Inbound/Outbound status or update the note) or delete it to remove the block entirely.

Searching and Filtering

Use the Search field at the top-right of the table to quickly find a specific number or note (for example, searching "scam" will surface every entry with that word in its Notes column).

Pagination

At the bottom of the page you can:

• Choose how many entries to display per page using the Lines per page dropdown (default 50)
• See the total count of entries (e.g. "1 to 16 of 16 entries")
• Navigate between pages using the arrow controls if you have more entries than fit on one page

Best Practices

• Add a note every time. Entries without notes are hard to audit later — always record why a number was blocked (scammer, competitor, prank caller, etc.).
• Review the list periodically. Numbers change hands, and a block that made sense a year ago may no longer be relevant.
• Use direction-specific blocking deliberately. Only block the direction you actually need — for example, block inbound spam but leave outbound allowed if your team may need to call the number back for verification.
• Combine with Call Blocking rules (Tools > Call Blocking) for pattern-based blocking (e.g. entire number ranges or countries) rather than blocking numbers one at a time.