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

OAKFIELD prefixes in area code 585

NANPA records 4 assigned NXX blocks to rate center OAKFIELD in area code 585, 0.6% of the 676 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 PEERLESS NETWORK OF NEW YORK, LLC - NY (1), TC SYSTEMS, INC. - NY (1), ONVOY SPECTRUM, LLC (1). The earliest assignment on record here is 2016-03-09 and the most recent 2023-02-24. 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 274, 920 – overlay codes cover the same geography, so a rate center is served by all of them.

4 assigned blocks – 0.6% of 585
4 holders of record
4 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
585-304 Peerless PEERLESS NETWORK OF NEW YORK, LLC - NY 2016-03-09 yes yes
585-661 AT&T TC SYSTEMS, INC. - NY 2023-02-24 yes yes
585-665 Charter ONVOY SPECTRUM, LLC 2021-05-14 yes yes
585-948 Verizon VERIZON NEW YORK, INC. – 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
PEERLESS NETWORK OF NEW YORK, LLC - NY Peerless 1 25%
TC SYSTEMS, INC. - NY AT&T 1 25%
ONVOY SPECTRUM, LLC Charter 1 25%
VERIZON NEW YORK, INC. Verizon 1 25%

Frequently asked

Which prefixes belong to OAKFIELD in area code 585?

4 blocks: 304, 661, 665, 948. The table above gives the holder of each.

Which carriers have numbers in OAKFIELD?

PEERLESS NETWORK OF NEW YORK, LLC - NY (1 block), TC SYSTEMS, INC. - NY (1 block), ONVOY SPECTRUM, LLC (1 block), VERIZON NEW YORK, INC. (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is OAKFIELD 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 585

All 676 prefixes in 585