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

HAYFORK prefixes in area code 530

NANPA records 3 assigned NXX blocks to rate center HAYFORK in area code 530, 0.4% of the 782 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 FRONTIER CALIFORNIA INC. (1), LEVEL 3 COMMUNICATIONS, LLC - CA (1), TON80 COMMUNICATIONS, LLC (1). The earliest assignment on record here is 2022-02-25 and the most recent 2022-02-25. 3 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

3 assigned blocks – 0.4% of 530
3 holders of record
3 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
530-628 Frontier FRONTIER CALIFORNIA INC. – yes yes
530-706 Lumen LEVEL 3 COMMUNICATIONS, LLC - CA – yes yes
530-910 TON80 COMMUNICATIONS, LLC 2022-02-25 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
FRONTIER CALIFORNIA INC. Frontier 1 33.3%
LEVEL 3 COMMUNICATIONS, LLC - CA Lumen 1 33.3%
TON80 COMMUNICATIONS, LLC – 1 33.3%

Frequently asked

Which prefixes belong to HAYFORK in area code 530?

3 blocks: 628, 706, 910. The table above gives the holder of each.

Which carriers have numbers in HAYFORK?

FRONTIER CALIFORNIA INC. (1 block), LEVEL 3 COMMUNICATIONS, LLC - CA (1 block), TON80 COMMUNICATIONS, 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 HAYFORK 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 530

All 782 prefixes in 530