North American Numbers Source-cited · ownership disclosed
Area code
585
In service
United States · since 2001

Rochester / Western NY

Serves Rochester and surrounding western New York, split from 716 in 2001. Covers roughly eight counties including Monroe.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Rochester / Western NY
Type
geographic
Status
in service
In service since
2001
Projected exhaust
2035 Q2

Status, dates and counts are read from NumberResearch (NANPA / CNAC / FCC records). Assignment records show initial assignees, not the carrier serving a number today.

A · Where it is

Where 585 is

Western New York (Rochester region).

Communities served wholly or partly by 585:

RochesterBataviaCanandaiguaGeneseoMedinaVictorAlbionWellsville

Representative; the 716/585 border roughly follows county lines with some ZIPs spanning both.

B · Relationships

How it relates to other codes

The codes 585 was split from, spawned, or shares its area with. A split divides the map and changes some numbers; an overlay shares the same ground and changes none — what's the difference?

Split from · 2001 716 Buffalo / Niagara Split from 716 when 716 was reduced to the Buffalo area.
What's changing. No overlay; sole area code for its region, with adequate numbering capacity into the late 2020s.
C · History

How 585 got here

2001-11-15
Activated in a split from 716; second new NY area code since 1954 (after 845 in 2000).
Source: Wikipedia 585
2023-10
Not expected to need relief until at least 2029.
Source: Wikipedia 585
D · Capacity

How full it is

Prefixes assigned
699
Prefixes available
101
Thousands-blocks assigned
3,730

Prefix-assignment counts describe allocation to carriers, not how many individual numbers are in use. Full technical records: NumberResearch ↗.

Compare 585 with another code →
Sources
Wikipedia (secondary) ↗
Area code 585
NumberResearch.org ↗
Live status, dates, assignment counts and exhaust forecast — data as of 2026-09-18 (CC BY 4.0).

Place, relationships and history above are compiled by North American Numbers from the sources listed and last checked 2026-09-18. A check date is not an expert review — see how this is made. Flag an error.