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

DEL REY prefixes in area code 559

NANPA records 6 assigned NXX blocks to rate center DEL REY in area code 559, 0.8% of the 785 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. 5 holders hold those blocks, the largest being ONVOY, LLC - CA (2), BANDWIDTH.COM CLEC, LLC - CA (1), PACIFIC BELL (1). The earliest assignment on record here is 2022-10-25 and the most recent 2022-10-25. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

6 assigned blocks – 0.8% of 559
5 holders of record
6 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
559-258 Bandwidth BANDWIDTH.COM CLEC, LLC - CA – yes yes
559-405 Onvoy ONVOY, LLC - CA – yes yes
559-521 Onvoy ONVOY, LLC - CA – yes yes
559-888 AT&T PACIFIC BELL – yes yes
559-943 XO CALIFORNIA, INC. – yes yes
559-995 COMMIO, LLC 2022-10-25 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 - CA Onvoy 2 33.3%
BANDWIDTH.COM CLEC, LLC - CA Bandwidth 1 16.7%
PACIFIC BELL AT&T 1 16.7%
XO CALIFORNIA, INC. – 1 16.7%
COMMIO, LLC – 1 16.7%

Frequently asked

Which prefixes belong to DEL REY in area code 559?

6 blocks: 258, 405, 521, 888, 943, 995. The table above gives the holder of each.

Which carriers have numbers in DEL REY?

ONVOY, LLC - CA (2 blocks), BANDWIDTH.COM CLEC, LLC - CA (1 block), PACIFIC BELL (1 block), XO CALIFORNIA, INC. (1 block), COMMIO, 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 DEL REY 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 559

All 785 prefixes in 559