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

KEMPTON prefixes in area code 484

NANPA records 3 assigned NXX blocks to rate center KEMPTON in area code 484, 0.4% of the 786 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 ONVOY, LLC - PA (1), LEVEL 3 COMMUNICATIONS, LLC - PA (1), TELNYX LLC (1). The earliest assignment on record here is 2021-05-05 and the most recent 2021-05-05. 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 codes 610, 765, 779, 815 – overlay codes cover the same geography, so a rate center is served by all of them.

3 assigned blocks – 0.4% of 484
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
484-600 Onvoy ONVOY, LLC - PA – yes yes
484-857 Lumen LEVEL 3 COMMUNICATIONS, LLC - PA – yes yes
484-914 Telnyx TELNYX LLC 2021-05-05 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
ONVOY, LLC - PA Onvoy 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - PA Lumen 1 33.3%
TELNYX LLC Telnyx 1 33.3%

Frequently asked

Which prefixes belong to KEMPTON in area code 484?

3 blocks: 600, 857, 914. The table above gives the holder of each.

Which carriers have numbers in KEMPTON?

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

Is KEMPTON 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 484

All 786 prefixes in 484