diff --git a/CHANGELOG.md b/CHANGELOG.md
index f379d6cbac6e..0b590f8e884a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ## Current
 
 ### Features
+
 - [#6721](https://github.com/blockscout/blockscout/pull/6721) - Implement fetching internal transactions from callTracer
 - [#5561](https://github.com/blockscout/blockscout/pull/5561), [#6523](https://github.com/blockscout/blockscout/pull/6523) - Improve working with contracts implementations
 - [#6401](https://github.com/blockscout/blockscout/pull/6401) - Add Sol2Uml contract visualization
@@ -29,6 +30,7 @@
 
 ### Fixes
 
+- [#6827](https://github.com/blockscout/blockscout/pull/6827) - Fix handling unknown calls from `callTracer`
 - [#6532](https://github.com/blockscout/blockscout/pull/6532) - Fix index creation migration
 - [#6473](https://github.com/blockscout/blockscout/pull/6473) - Fix state changes for contract creation transactions
 - [#6475](https://github.com/blockscout/blockscout/pull/6475) - Fix token name with unicode graphemes shortening
diff --git a/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/geth.ex b/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/geth.ex
index e8c20ceb4001..599dbb32e262 100644
--- a/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/geth.ex
+++ b/apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/geth.ex
@@ -3,6 +3,8 @@ defmodule EthereumJSONRPC.Geth do
   Ethereum JSONRPC methods that are only supported by [Geth](https://github.com/ethereum/go-ethereum/wiki/geth).
   """
 
+  require Logger
+
   import EthereumJSONRPC, only: [id_to_params: 1, integer_to_quantity: 1, json_rpc: 2, request: 1]
 
   alias EthereumJSONRPC.{FetchedBalance, FetchedCode, PendingTransaction}
@@ -246,7 +248,8 @@ defmodule EthereumJSONRPC.Geth do
          acc,
          trace_address,
          inner?
-       ) do
+       )
+       when type in ~w(CALL CALLCODE DELEGATECALL STATICCALL CREATE CREATE2 SELFDESTRUCT REWARD) do
     new_trace_address = [index | trace_address]
 
     formatted_call =
@@ -283,6 +286,11 @@ defmodule EthereumJSONRPC.Geth do
     )
   end
 
+  defp parse_call_tracer_calls({call, _}, acc, _trace_address, _inner?) do
+    Logger.warning("Call from a callTracer with an unknown type: #{inspect(call)}")
+    acc
+  end
+
   defp parse_call_tracer_calls(calls, acc, trace_address, _inner) when is_list(calls) do
     calls
     |> Stream.with_index()