NumberingData
Verified Nov 1, 2026 · Source: NANPA CO Code Assignment Records

DUNCANNON prefixes in area code 717

NANPA records 3 assigned NXX blocks to rate center DUNCANNON in area code 717, 0.4% of the 784 blocks assigned in the code. A rate center is the billing geography a block is allocated to – NANPA truncates the name to ten characters, so read it as a NANPA label rather than a town. 3 holders hold those blocks, the largest being CENTURYLINK COMMUNICATIONS, LLC (1), BRIGHTSPEED OF PENNSYLVANIA, LLC (1), LEVEL 3 COMMUNICATIONS, LLC - PA (1). The earliest assignment on record here is 2015-06-04 and the most recent 2015-06-04. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots. The same rate center name also appears in area code 223 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 717
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
717-596 Lumen CENTURYLINK COMMUNICATIONS, LLC – yes yes
717-834 Brightspeed BRIGHTSPEED OF PENNSYLVANIA, LLC – yes yes
717-904 Lumen LEVEL 3 COMMUNICATIONS, LLC - PA 2015-06-04 yes yes

The holder is who received the block from the numbering administrator. It is not necessarily the carrier serving a given number: numbers move with their owners, and a pooled block is shared.

Who holds the blocks

HolderBrandBlocksShare here
CENTURYLINK COMMUNICATIONS, LLC Lumen 1 33.3%
BRIGHTSPEED OF PENNSYLVANIA, LLC Brightspeed 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - PA Lumen 1 33.3%

Frequently asked

Which prefixes belong to DUNCANNON in area code 717?

3 blocks: 596, 834, 904. The table above gives the holder of each.

Which carriers have numbers in DUNCANNON?

CENTURYLINK COMMUNICATIONS, LLC (1 block), BRIGHTSPEED OF PENNSYLVANIA, LLC (1 block), LEVEL 3 COMMUNICATIONS, LLC - PA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is DUNCANNON a city?

It is a rate center – the unit NANPA allocates number blocks to. Its name is abbreviated to ten characters and is not necessarily a settlement: we print it as recorded rather than guess at the full name.

Other rate centers in 717

All 784 prefixes in 717