diff --git a/src/navv/bll.py b/src/navv/bll.py
index df0a5cc..aa3ff75 100644
--- a/src/navv/bll.py
+++ b/src/navv/bll.py
@@ -159,3 +159,46 @@ def get_snmp_df(zeek_data: list):
             "community",
         ],
     )
+
+@timeit
+def get_mac_df(zeek_df: pd.DataFrame):
+    smac_df = zeek_df[
+        [
+            "src_mac",
+            "src_ip",
+        ]
+    ].reset_index(drop=True)
+
+    dmac_df = zeek_df[
+        [
+            "dst_mac",
+            "dst_ip",
+        ]
+    ].reset_index(drop=True)
+
+    smac_df = smac_df.rename(columns={'src_mac': 'mac', 'src_ip': 'ip'})
+    dmac_df = dmac_df.rename(columns={'dst_mac': 'mac', 'dst_ip': 'ip'})
+    mac_df = smac_df._append(dmac_df, ignore_index=True)
+    mac_df = mac_df.groupby('mac')['ip'].apply(list).reset_index(name='associated_ip')
+
+    for index, row in enumerate(mac_df.to_dict(orient="records"), start=0):
+        # Source IPs - Need to get unique values
+        ips = set(row["associated_ip"])
+        list_ips = (list(ips))
+        if len(list_ips) > 1:
+            ip_list = ', '.join([str(item) for item in list_ips])
+
+        else:
+            ip_list = list_ips[0]
+
+        mac_df.at[index, 'associated_ip'] = ip_list
+
+    # Source Manufacturer column
+    mac_vendors = {}
+    with open(MAC_VENDORS_JSON_FILE) as f:
+        mac_vendors = json.load(f)
+    mac_df["vendor"] = mac_df["mac"].apply(
+        lambda mac: get_mac_vendor(mac_vendors, mac)
+    )
+
+    return mac_df
\ No newline at end of file
diff --git a/src/navv/commands.py b/src/navv/commands.py
index fc912bf..a939ebc 100644
--- a/src/navv/commands.py
+++ b/src/navv/commands.py
@@ -8,7 +8,7 @@
 
 # cisagov Libraries
 from navv.gui.app import app
-from navv.bll import get_inventory_report_df, get_snmp_df, get_zeek_df
+from navv.bll import get_inventory_report_df, get_snmp_df, get_zeek_df, get_mac_df
 from navv.message_handler import success_msg, warning_msg
 from navv.spreadsheet_tools import (
     auto_adjust_width,
@@ -24,6 +24,7 @@
     write_snmp_sheet,
     write_stats_sheet,
     write_unknown_internals_sheet,
+    write_mac_sheet,
 )
 from navv.zeek import (
     get_conn_data,
@@ -90,6 +91,7 @@ def generate(customer_name, output_dir, pcap, zeek_logs):
 
     # Get inventory report dataframe
     inventory_df = get_inventory_report_df(zeek_df)
+    mac_df = get_mac_df(zeek_df)
 
     # Turn zeekcut data into rows for spreadsheet
     rows = create_analysis_array(zeek_data, timer=timer_data)
@@ -118,6 +120,8 @@ def generate(customer_name, output_dir, pcap, zeek_logs):
 
     write_snmp_sheet(snmp_df, wb)
 
+    write_mac_sheet(mac_df, wb)
+
     auto_adjust_width(wb["Analysis"])
 
     times = (
diff --git a/src/navv/spreadsheet_tools.py b/src/navv/spreadsheet_tools.py
index e17ecbb..8b4b87c 100644
--- a/src/navv/spreadsheet_tools.py
+++ b/src/navv/spreadsheet_tools.py
@@ -14,6 +14,7 @@
 
 import openpyxl
 import openpyxl.styles
+from openpyxl.styles import Alignment
 from openpyxl.worksheet.table import Table
 import netaddr
 from tqdm import tqdm
@@ -478,6 +479,31 @@ def write_stats_sheet(wb, stats):
         stats_sheet[f"{string.ascii_uppercase[col_index]}2"].value = stats[stat]
     auto_adjust_width(stats_sheet)
 
+def write_mac_sheet(mac_df, wb):
+    """Fill spreadsheet with MAC address -> IP address translation with manufacturer information"""
+    sheet = make_sheet(wb, "MAC", idx=4)
+    sheet.append(
+        ["MAC", "Manufacturer", "IPs"]
+    )
+    for index, row in enumerate(mac_df.to_dict(orient="records"), start=2):
+        # Source MAC column
+        sheet[f"A{index}"].value = row["mac"]
+
+        # Source Manufacturer column
+        sheet[f"B{index}"].value = row["vendor"]
+
+        # Source IPs
+        sheet[f"C{index}"].value = row["associated_ip"]
+        if len(row["associated_ip"]) > 16:
+            sel_cell = sheet[f"C{index}"]
+            sel_cell.alignment = Alignment(wrap_text=True)
+            est_row_hght = int(len(row["associated_ip"])/50)
+            if est_row_hght < 1:
+                est_row_hght = 1
+            sheet.row_dimensions[index].height = est_row_hght * 15
+
+    auto_adjust_width(sheet)
+    sheet.column_dimensions["C"].width = 39 * 1.2
 
 def make_sheet(wb, sheet_name, idx=None):
     """Create the sheet if it doesn't already exist otherwise remove it and recreate it"""