In NAS, from the Thousands-Block/CO Code toolbar, select Thousands-Block Requests, then select Thousands-Block Request. Complete the Service Area screen, if the inventory needs to be replenished, then NAS will present the Pool Replenishment Needed screen. From this screen, select Request NANPA to seek voluntary disconnects, then the Next button. NANPA will then seek voluntary disconnects from service providers with resources in the State, NPA, and Rate Center.

You must provide the reason for the change e.g., merger/acquisition, OCN change within company, or other using the “Comments” field provided. For any reason other than merger/acquisition, you must also state in the “Comments” field that there are assigned numbers.

In NAS, from the Thousands-Block/CO Code toolbar, select Thousands-Block Requests then select Thousands-Block Modification Request. From the Type of Change screen, select OCN: Inter-Company (Transferring resource from another Company) or OCN: Intra-Company (Updating OCN within my Company) and select this checkbox, “This modification is in response to a request from NANPA to become the new Thousands-Block Holder.”

You will need to submit a CO Code Disconnect request and a Thousands-Block Disconnect request for all assigned or retained Thousands-Blocks within the Pooled CO Code that you are disconnecting.

When a Thousands-Block is disconnected/donated via a Part 1 request or reclaimed by the regulatory authority, NANPA will complete sections A and B of the Part 5 form and forward it to the NPAC. The NPAC will then complete section C of the Part 5 form and notify NANPA, the CO Code Holder, and the Thousands-Block holder that the Thousands-Block has been removed from the NPAC. The CO Code Holder is part of this notification process so that they can provide the blank and vacant code announcements for this Thousands-Block.

To extend a Part 4 due date, you must contact the appropriate regulatory authority  to request a Part 4 extension.

The Part 4 will be available to submit in NAS at the effective date of the thousands-block and not before, this will account for effective date changes whether the date was rescheduled to an earlier date or a later date than the original effective date.

You must have at least one customer on the Thousands-Block to submit a Part 4 to acknowledge that the resource is in service.  “In service” is defined in the ATIS-0300119, Thousands-Block (NPA-NXX-X) & Central Office Code (NPA-NXX) Administration Guidelines (TBCOCAG) as “A Central Office (CO) Code (NPA-NXX) or Thousands-Block (NPA-NXX-X) for which local routing information appears in the LERG™ Routing Guide, and one or more Telephone Numbers (TN) within the CO Code or Thousands-Block has been Assigned to an end user (FCC 00-104, ¶240).

NAS will send a Part 4 reminder email one month prior to the Part 4 coming due. 

Once the Thousands-Blocks have been assigned to you, then you can submit a block modification request in NAS and select ‘Part 1B’ as the type of change, then indicate “Yes” on the Part 1B for ‘Will block X of X be activated by NPAC’ and “No” on the Part 1B for “Is block being allocated back to the code holder on the switch where the NXX Code Resides”.