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

W WEBSTER prefixes in area code 585

NANPA records 7 assigned NXX blocks to rate center W WEBSTER in area code 585, 1.0% 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 FRONTIER TELEPHONE OF ROCHESTER, INC. (4), LEVEL 3 TELECOM OF NEW YORK, LP - NY (1), COMMIO, LLC (1). The earliest assignment on record here is 2013-06-14 and the most recent 2023-08-08. 6 of them are in thousands-block pooling, so those prefixes are shared between carriers in 1,000-number lots.

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

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
585-347 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – yes yes
585-446 Lumen LEVEL 3 TELECOM OF NEW YORK, LP - NY 2013-06-14 yes yes
585-670 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – yes yes
585-671 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – no yes
585-675 COMMIO, LLC 2023-08-08 yes yes
585-787 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – yes yes
585-822 Onvoy ONVOY, LLC- NY 2021-01-27 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 TELEPHONE OF ROCHESTER, INC. Frontier 4 57.1%
LEVEL 3 TELECOM OF NEW YORK, LP - NY Lumen 1 14.3%
COMMIO, LLC – 1 14.3%
ONVOY, LLC- NY Onvoy 1 14.3%

Frequently asked

Which prefixes belong to W WEBSTER in area code 585?

7 blocks: 347, 446, 670, 671, 675, 787, 822. The table above gives the holder of each.

Which carriers have numbers in W WEBSTER?

FRONTIER TELEPHONE OF ROCHESTER, INC. (4 blocks), LEVEL 3 TELECOM OF NEW YORK, LP - NY (1 block), COMMIO, LLC (1 block), ONVOY, LLC- NY (1 block). These are the holders on record; the carrier actually serving a given number can differ, because numbers move with their owners.

Is W WEBSTER 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