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

GUSTINE prefixes in area code 209

NANPA records 4 assigned NXX blocks to rate center GUSTINE in area code 209, 0.5% 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. 4 holders hold those blocks, the largest being BANDWIDTH.COM CLEC, LLC - CA (1), ONVOY, LLC - CA (1), LEVEL 3 COMMUNICATIONS, LLC - CA (1). 4 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 325, 350 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.5% of 209
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
209-215 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
209-733 Onvoy ONVOY, LLC - CA – yes yes
209-780 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
209-854 AT&T PACIFIC BELL – 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
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 25%
ONVOY, LLC - CA Onvoy 1 25%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 25%
PACIFIC BELL AT&T 1 25%

Frequently asked

Which prefixes belong to GUSTINE in area code 209?

4 blocks: 215, 733, 780, 854. The table above gives the holder of each.

Which carriers have numbers in GUSTINE?

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

Is GUSTINE 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 209

All 784 prefixes in 209