National Pooling Administration
Tools - Archives, Tip of the Month - 2006, February
NXX Requests for Dedicated Customers
At the request of the INC, the following reminder is being sent.
Per section 3.2 of the Thousands-Block Number (NXX-X) Pooling
Administration Guidelines (TBPAG):
A pooling SP’s requirement for an entire NXX Code (i.e., 10,000
TNs) to satisfy the numbering needs for a single customer
shall be obtained from the PA, not the CO Code Administrator
(see Section 7.5.3). An entire NXX code dedicated for a single
customer’s use may be classified as a non-pooled code at the
discretion of the SP. The SP will be considered the CO Code
Holder by leaving the pool indicator field blank in Section 1.5
of the CO Code Part 1. In addition, the SP should write
“Non-pooled code for dedicated customer” in Section 1.7 of the
If this option is selected, but the SP did not follow the
guideline direction for requesting the pooling indicator be
marked as non-pooled on the Part 1 form, the SP must e-mail the
PA and NANPA prior to the original Part 3 effective date in
order for the NXX code dedicated for a single customer’s use be
classified as a non-pooled code. The SP is reminded that a
portability indicator may be required. Further, the SP is
reminded that the LERG effective date reflecting the NXX code as
non-pooled may be different than the original effective date.
The NXX code dedicated for a single customer’s use will become a
pooled code if and when thousands-blocks from the NXX code are
donated to the pool.
To access the current TBPAG located on the ATIS website, click
here (link removed).
 Single customer is defined as one customer requiring 10,000
consecutive TNs from one NXX.