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

GENESEO prefixes in area code 585

NANPA records 8 assigned NXX blocks to rate center GENESEO in area code 585, 1.2% 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. 5 holders hold those blocks, the largest being CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY (3), FRONTIER TELEPHONE OF ROCHESTER, INC. (2), TC SYSTEMS, INC. - NY (1). The earliest assignment on record here is 2001-04-11 and the most recent 2024-03-14. 8 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 309, 620 – overlay codes cover the same geography, so a rate center is served by all of them.

8 assigned blocks – 1.2% of 585
5 holders of record
8 of them pooled in 1,000-number lots

Prefixes assigned here

PrefixHolder of recordAssignedPooledIn service
585-243 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – yes yes
585-245 Frontier FRONTIER TELEPHONE OF ROCHESTER, INC. – yes yes
585-443 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 2012-08-07 yes yes
585-447 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 2008-06-05 yes yes
585-519 AT&T TC SYSTEMS, INC. - NY 2001-04-11 yes yes
585-549 Verizon CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 2019-06-03 yes yes
585-741 Onvoy ONVOY, LLC- NY 2024-03-14 yes yes
585-991 Windstream PAETEC ITEL, LLC – 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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY Verizon 3 37.5%
FRONTIER TELEPHONE OF ROCHESTER, INC. Frontier 2 25%
TC SYSTEMS, INC. - NY AT&T 1 12.5%
ONVOY, LLC- NY Onvoy 1 12.5%
PAETEC ITEL, LLC Windstream 1 12.5%

Same rate center in other codes

Overlay codes cover the same geography, so one rate center is served by all of them.

Frequently asked

Which prefixes belong to GENESEO in area code 585?

8 blocks: 243, 245, 443, 447, 519, 549, 741, 991. The table above gives the holder of each.

Which carriers have numbers in GENESEO?

CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY (3 blocks), FRONTIER TELEPHONE OF ROCHESTER, INC. (2 blocks), TC SYSTEMS, INC. - NY (1 block), ONVOY, LLC- NY (1 block), PAETEC ITEL, 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 GENESEO 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