Area code
610
610 is a United States area code. Under the North American Numbering Plan it belongs to Pennsylvania, which has 15 area codes in total.
Validate a number in 610
Paste a full number and the tool checks it against the numbering plan. It returns the standard formats, the line type the plan assigns and the area code region.
Digits with or without punctuation work. Numbers outside the US are read with the +country code.
Area code 610 at a glance
NANPA lists 782 central office codes (prefixes) in use in area code 610, held by 40 holders across 90 rate centers.
| Fact | Value |
|---|---|
| In service since | 1994-01-08 |
| Time zone | Eastern (E) |
| Assigned overlays | 484 (1999-06-05), 835 (2022-09-02) |
| Prefixes in use | 782 |
| Pooled prefixes | 433 (55%) |
| Rate centers | 90 |
| Companies holding prefixes | 40 |
| Assignment dates on file | 2001-03-08 to 2026-02-17 (69 prefixes) |
| ZIP codes in its places | 76 |
Rate centers in area code 610
| Rate center | Prefixes | Share |
|---|---|---|
| PHPHSBZN30 | 86 | 11% |
| ALLENTOWN | 71 | 9% |
| READING | 58 | 7% |
| PHPHSBZN28 | 38 | 5% |
| BETHLEHEM | 32 | 4% |
| PHPHSBZN23 | 29 | 4% |
| PHPHSBZN26 | 25 | 3% |
| PHPHSBZN31 | 24 | 3% |
| 82 other rate centers | 419 | 54% |
Who holds the prefixes in 610
Verizon Pennsylvania holds the most prefixes, 322 (41%). 55% of the prefixes are pooled, which means their thousands-blocks can belong to different companies.
| Holder | Prefixes | Share |
|---|---|---|
| Verizon Pennsylvania | 322 | 41% |
| Mcimetro Access Transmission Services | 74 | 9% |
| New Cingular Wireless PCS | 56 | 7% |
| Verizon Wireless | 43 | 5% |
| Teleport Communications America | 38 | 5% |
| Level 3 Communications | 36 | 5% |
| 34 other carriers | 213 | 27% |
A prefix holder is the company a code was assigned to, not necessarily a number's current carrier, because numbers can be ported to another company. Find which carrier a number is on, or browse the prefix holders.
History of area code 610
- 1947-01-01 Area code 215, named as the parent of 610 in the NANPA report, was in service.
- 1994-01-08 Area code 610 went into service.
- 1999-06-05 Area code 484 went into service as an overlay in the same area as 610.
Area codes nearest to 610
Distance is measured between the centers of the ZIP code places each area code serves, so it is a rough guide.
Overlay codes in the same area
ZIP codes in area code 610
76 ZIP codes fall in places that have a rate center in this area code.
| Place | ZIP codes |
|---|---|
| Reading, PA | 12 |
| Allentown, PA | 8 |
| Bethlehem, PA | 6 |
A ZIP code and an area code are unrelated systems. A ZIP code can sit in more than one area code, and an area code spans many ZIP codes.
Complaints on file for 610 numbers
3,499 FCC complaints are on file for 2,869 numbers in 610, most often filed as "Unwanted Calls". These are unverified consumer reports.
| Year of latest complaint | Numbers |
|---|---|
| 2023 | 143 |
| 2024 | 120 |
| 2025 | 140 |
Other area codes in Pennsylvania
Pennsylvania is one state with 15 area codes in the NANPA table. 610 is one of them.
Next to 610 in the numbering table
These are the codes just before and after 610 when all are sorted by number. They are neighbours on the list, not necessarily on the map.
What the area code does and does not tell you
A number that starts with 610 was first assigned in Pennsylvania. That is a fact about where the number began, and it is a useful hint when you check a form entry, for example a billing address in Pennsylvania next to a 610 phone number.
It does not show where the person is today. A number stays with its owner after a move or a change of provider (number portability), and mobile numbers travel with the handset. The area code also cannot tell you whether the line is active, who the carrier is, or whether the number is mobile or fixed: the plan shares those ranges. Read more about the area code, the numbering plan and line type.
Check numbers in bulk with the API
| Product | Credits | Docs |
|---|---|---|
| Phone Numbering-Plan Validation | 1 credit per valid number | API docs |
| Phone Intelligence (carrier and line status) | 1 credit per check (invalid numbers outside the US and Canada are free) | Product page |
Questions about area code 610
Where is area code 610?
NANPA assigns area code 610 to Pennsylvania, United States.
In which state does area code 610 sit?
Pennsylvania. 610 is one of 15 area codes the NANPA table assigns to the state.
Which places does area code 610 cover?
The places with the most ZIP codes among the rate centers in 610 are Reading, PA, Allentown, PA and Bethlehem, PA. The rate center list on this page shows all of them.
Who owns area code 610?
NANPA assigns area codes. Within 610, Verizon Pennsylvania holds the most prefixes, 322 prefixes or 41%.
Which time zone does 610 use?
The NANPA NPA report lists the time zone for 610 as Eastern (E).
What year did 610 enter service?
The NANPA NPA report gives an in-service date of 1994-01-08, so 610 has been in use since 1994.
Does area code 610 have an overlay?
Yes. 484 (in service 1999-06-05) and 835 (in service 2022-09-02) share the same area with 610, so numbers from all of them are local to each other.
Which area codes are nearest to 610?
The area codes closest to 610, measured between the centers of the ZIP code places they serve, are 445 (about 24 miles), 215 (about 25 miles), 267 (about 25 miles), 609 (about 56 miles) and 640 (about 57 miles).
How many prefixes does area code 610 have?
NANPA's report dated 2026-10-17 lists 782 prefixes in service in 610, spread over 90 rate centers and 40 holders.
Are there complaints about 610 numbers?
The FCC data on file has 3,499 complaints for 2,869 numbers in 610. They are unverified consumer reports. A number with no complaints on file is not proven safe.
Area code assignments: North American Numbering Plan Administrator NPA report, file dated 10/17/2026, retrieved 2026-10-17. Source file. New codes are assigned several times a year. Prefixes, rate centers, holders, time zone, in-service date and overlays: NANPA central office code report dated 2026-10-17 and NPA report dated 2026-10-18. Complaints: FCC consumer complaints open data, fetched 2026-10-17. ZIP code places: Postal code places and coordinates: GeoNames (geonames.org), licensed CC BY 4.0.