diff --git a/packages/core/src/v3/utils/flattenAttributes.ts b/packages/core/src/v3/utils/flattenAttributes.ts
index 545b0184e6..57e291a693 100644
--- a/packages/core/src/v3/utils/flattenAttributes.ts
+++ b/packages/core/src/v3/utils/flattenAttributes.ts
@@ -3,6 +3,10 @@ import { Attributes } from "@opentelemetry/api";
 export const NULL_SENTINEL = "$@null((";
 export const CIRCULAR_REFERENCE_SENTINEL = "$@circular((";
 
+function escapeKey(key: string): string {
+  return key.replace(/\./g, '\\.');
+}
+
 export function flattenAttributes(
   obj: Record<string, unknown> | Array<unknown> | string | boolean | number | null | undefined,
   prefix?: string ,
@@ -53,7 +57,8 @@ export function flattenAttributes(
 
 
   for (const [key, value] of Object.entries(obj)) {
-    const newPrefix = `${prefix ? `${prefix}.` : ""}${Array.isArray(obj) ? `[${key}]` : key}`;
+  const escapedKey = escapeKey(key);
+   const newPrefix = `${prefix ? `${prefix}.` : ""}${Array.isArray(obj) ? `[${escapedKey}]` : escapedKey}`;
     if (Array.isArray(value)) {
       for (let i = 0; i < value.length; i++) {
         if (typeof value[i] === "object" && value[i] !== null) {
@@ -86,6 +91,10 @@ function isRecord(value: unknown): value is Record<string, unknown> {
   return value !== null && typeof value === "object" && !Array.isArray(value);
 }
 
+function unescapeKey(key: string): string {
+  return key.replace(/\\\./g, '.');
+}
+
 export function unflattenAttributes(
   obj: Attributes
 ): Record<string, unknown> | string | number | boolean | null | undefined {
@@ -109,24 +118,21 @@ export function unflattenAttributes(
   const result: Record<string, unknown> = {};
 
   for (const [key, value] of Object.entries(obj)) {
-    const parts = key.split(".").reduce(
-      (acc, part) => {
-        if (part.startsWith("[") && part.endsWith("]")) {
-          // Handle array indices more precisely
-          const match = part.match(/^\[(\d+)\]$/);
-          if (match && match[1]) {
-            acc.push(parseInt(match[1]));
-          } else {
-            // Remove brackets for non-numeric array keys
-            acc.push(part.slice(1, -1));
-          }
-        } else {
-          acc.push(part);
-        }
-        return acc;
-      },
-      [] as (string | number)[]
-    );
+  const parts = key
+    .split('.') // Split by all dots
+    .reduce((acc, part, i, arr) => {
+      // If the previous part ends with an odd number of backslashes,
+      // the dot is escaped and should be part of the last segment.
+      if (i > 0 && arr[i - 1].match(/\\+$/)?.[0]?.length % 2 === 1) {
+        acc[acc.length - 1] += '.' + part;
+      } else {
+        acc.push(part);
+      }
+      return acc;
+    }, [] as (string | number)[])
+    .map(unescapeKey); // Unescape keys
+   }
+   
 
     let current: any = result;
     for (let i = 0; i < parts.length - 1; i++) {