North American Numbers Source-cited · ownership disclosed
Area code
835
In service
United States · since 2022

Allentown/Reading (overlay)

835 is the third code in the 610 overlay complex; first established in 2000 but withdrawn in 2005 due to number pooling, it was re-approved and activated in 2022.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Allentown/Reading (overlay)
Type
geographic
Status
in service
In service since
2022
Projected exhaust
2050 Q3

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 835 is

Eastern/southeastern Pennsylvania (same footprint as 610).

Communities served wholly or partly by 835:

AllentownBethlehemReadingWest Chester

Shares the 610/484 territory.

B · Relationships

How it relates to other codes

The codes 835 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?

Overlay · 2022 610 Allentown/Reading/Western Suburbs 835 overlays 610.
Overlay · 2022 484 Allentown/Reading (overlay) Third code in 610/484/835 overlay complex.
What's changing. Active; part of 610/484/835 overlay.
C · History

How 835 got here

2000
Originally established as overlay, then withdrew in 2005 due to number pooling.
Source: Wikipedia (secondary)
2022-09-02
CO code assignments began.
Source: Wikipedia 610/484/835
D · Capacity

How full it is

Prefixes assigned
122
Prefixes available
678
Thousands-blocks assigned
950

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

Compare 835 with another code →
Sources
Wikipedia ↗
Area codes 610, 484, and 835
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.