North American Numbers Source-cited · ownership disclosed
Area code
223
In service
United States · since 2017

Harrisburg (overlay)

223 is an all-service overlay of area code 717, covering the same 16-county south-central Pennsylvania region including Harrisburg, Lancaster, and York.

The essentials Numbering data · NumberResearch · as of 2026-09-18
Place
Harrisburg (overlay)
Type
geographic
Status
in service
In service since
2017
Projected exhaust
2054 Q1

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 223 is

South-central Pennsylvania (same footprint as 717).

Communities served wholly or partly by 223:

HarrisburgLancasterYork

Serves the identical 16-county 717 territory; new-number assignments only.

B · Relationships

How it relates to other codes

The codes 223 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 · 2017 717 Harrisburg/Lancaster/York 223 overlays 717; both share the same geography.
What's changing. Active overlay of 717.
C · History

How 223 got here

2016-10-27
PA PUC voted 5-0 to approve NANPA overlay plan; 223 assigned.
Source: PA PUC press release 2016
2017-08-26
Mandatory 10-digit dialing began.
Source: Wikipedia 717/223
2017-09-26
223 became effective.
Source: Wikipedia 717/223
D · Capacity

How full it is

Prefixes assigned
268
Prefixes available
532
Thousands-blocks assigned
2,002

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

Compare 223 with another code →
Sources
Pennsylvania PUC ↗
223 Assigned as New Overlay Number for 717 Area Code
Wikipedia ↗
Area codes 717 and 223
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.