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

SEQUOIA prefixes in area code 559

NANPA records 4 assigned NXX blocks to rate center SEQUOIA in area code 559, 0.5% 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. 4 holders hold those blocks, the largest being IP HORIZON LLC (1), PACIFIC BELL (1), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1). 4 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

4 assigned blocks – 0.5% of 559
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
559-461 IP HORIZON LLC – yes yes
559-565 AT&T PACIFIC BELL – yes yes
559-654 Lumen LEVEL 3 TELECOM OF CALIFORNIA, LP - CA – yes yes
559-745 Onvoy ONVOY, LLC - CA – 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
IP HORIZON LLC – 1 25%
PACIFIC BELL AT&T 1 25%
LEVEL 3 TELECOM OF CALIFORNIA, LP - CA Lumen 1 25%
ONVOY, LLC - CA Onvoy 1 25%

Frequently asked

Which prefixes belong to SEQUOIA in area code 559?

4 blocks: 461, 565, 654, 745. The table above gives the holder of each.

Which carriers have numbers in SEQUOIA?

IP HORIZON LLC (1 block), PACIFIC BELL (1 block), LEVEL 3 TELECOM OF CALIFORNIA, LP - CA (1 block), ONVOY, LLC - CA (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is SEQUOIA 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