Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
British Rail Class 419
Table title:
Fleet details
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=2 rowspan=1 > Unit Number </th><th colspan=1 rowspan=2 > Final Livery </th><th colspan=1 rowspan=2 > DMLV </th><th colspan=1 rowspan=2 > Withdrawn </th><th colspan=1 rowspan=2 > Status </th></tr>
<tr> <th colspan=1 rowspan=1 > Original </th><th colspan=1 rowspan=1 > Departmental </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9001 </td><td colspan=1 rowspan=1 > 931091 </td><td colspan=1 rowspan=1 > BR Green </td><td colspan=1 rowspan=1 > 68001 </td><td colspan=1 rowspan=1 > 1998 </td><td colspan=1 rowspan=1 > Stored at Southall </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9002 </td><td colspan=1 rowspan=1 > 931092 </td><td colspan=1 rowspan=1 > NSE </td><td colspan=1 rowspan=1 > 68002 </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > Stored at Southall </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9003 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > BR Green </td><td colspan=1 rowspan=1 > 68003 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Preserved at the Eden Valley Railway </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9004 </td><td colspan=1 rowspan=1 > 931094 </td><td colspan=1 rowspan=1 > BR Green </td><td colspan=1 rowspan=1 > 68004 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Preserved at the Mid-Norfolk Railway </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9005 </td><td colspan=1 rowspan=1 > 931095 </td><td colspan=1 rowspan=1 > LSE "Jaffa Cake" </td><td colspan=1 rowspan=1 > 68005 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Preserved at the Eden Valley Railway </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9006 </td><td colspan=1 rowspan=1 > 931096 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 68006 </td><td colspan=1 rowspan=1 > 1991 </td><td colspan=1 rowspan=1 > Scrapped 1994 following a collision. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9007 </td><td colspan=1 rowspan=1 > 931097 </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > 68007 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Scrapped 2006 for spares. </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9008 </td><td colspan=1 rowspan=1 > 931098 </td><td colspan=1 rowspan=1 > BR Green </td><td colspan=1 rowspan=1 > 68008 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Stored at Southall </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9009 </td><td colspan=1 rowspan=1 > 931099 </td><td colspan=1 rowspan=1 > BR Green </td><td colspan=1 rowspan=1 > 68009 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Stored at Southall </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 9010 </td><td colspan=1 rowspan=1 > 931090 </td><td colspan=1 rowspan=1 > In house colours </td><td colspan=1 rowspan=1 > 68010 </td><td colspan=1 rowspan=1 > 1997 </td><td colspan=1 rowspan=1 > Preserved at the Eden Valley Railway </td></tr>
</table>
Question:
What is the range of the Class 419 units?
Answer:
Class 419 units were originally numbered in the range 9001-9010.