What the List Merge utility does in VICIdial

After a long campaign run, you can end up with a collection of small lists — leftovers from earlier splits, partial imports, or finished segments that each hold a handful of Lead records. Managing a dozen thin lists is more overhead than it is worth: more List mix entries to maintain, more activation state to track, more noise in reporting. The List Merge utility collapses multiple lists into one, giving you a single Lead list to work with instead of many.

What happens when you merge

List Merge moves all lead records from the source lists you select into a single destination list. The destination list can be an existing list (in which case the incoming records are added to whatever is already there) or a new list you create for the purpose. The lead records themselves are unchanged: their call history, current status, custom field values, and Vendor lead code all carry over exactly as they were. The only thing that changes is the list ID each record belongs to — after the merge, they all belong to the destination list.

flowchart TD
  A[List X: 8,000 leads] --> D[List Merge]
  B[List Y: 5,000 leads] --> D
  C[List Z: 3,200 leads] --> D
  D --> E[Destination list: 16,200 leads]
  E --> F[Assign to campaign]
  E --> G[Run bulk operations as one unit]

What happens to the source lists

After a merge, the lead records have moved out of the source lists. Depending on your system's configuration and how the merge was run, the source lists may still exist as empty list containers, or they may be left with no records. They are not automatically deleted. You can remove them manually through the Lists page once you have confirmed the merge completed correctly. Leaving empty lists in the system causes no harm, but cleaning them up keeps your list inventory readable.

When merging makes sense

The clearest use case is cleanup after a campaign ends. You ran a split earlier to distribute work across teams, the campaign is done, and now you want to consolidate the remaining uncalled records into one list for a follow-up pass. Merging them avoids having to update the Campaign list mix with a long list of small source lists every time you change the rotation.

A second common scenario is lead source consolidation. If leads arrive from several different import batches, each deposited into its own list by your Lead loader workflow, merging them into a single working list simplifies the campaign setup. You add one list ID to the campaign instead of six. Reporting also becomes cleaner — a single list ID makes it straightforward to pull counts without having to sum across multiple List ID Override values.

One thing to consider before merging: if each source list has its own caller ID or dial settings configured at the list level, those settings are specific to each list and do not carry into the destination list automatically. The destination list uses its own settings. If the source lists had different configurations, review the destination list's settings before activating it.

How merge fits alongside split and other tools

List Merge and List Split are complementary operations. A common pattern is to split a large import into manageable pieces, run the campaign, then merge the leftover uncalled records from each piece back into one list for a follow-up campaign. This keeps your working lists at a reasonable size throughout the campaign lifecycle without losing any Lead records along the way.

After merging, the destination list is a normal list that works with every other bulk tool. You can run a bulk status update on it, apply Lead recycling filters, or move specific segments to another campaign — all using the Basic or Advanced Lead Management Tools on the same leads you just consolidated. The merge simply reduces the number of list IDs you have to keep track of going forward.

For a step-by-step walkthrough of the merge process, see how to combine multiple lists into a single list. For the full overview of bulk admin tools including List Split, see our VICIdial admin bulk tools guide.

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