The communications sector regulator said it had reviewed requests for an extension and decided to change the initial July 19 deadline.
"In the interests of ensuring a fair and transparent public consultation process, the deadline for written submissions has been extended," it said in a statement.
The Draft Numbering Plan Regulations - a type of numbering scheme used in telecommunications to allocate and route telephone numbers in a telephone network - was published in Government Gazette on June 4.
Public hearings would be held from August 17 to 18 and there would be no further extensions.
- Sapa