Area code 610: Pennsylvania
Area code 610 is a US state area code for Pennsylvania, on Eastern Time. It has 782 prefixes in service across 90 rate centers, the largest being Philadelphia Suburban Zone 30, Allentown and Reading. It shares its area with 484 and 835, so local numbers there can start with any of them. Local calls there take 10 digits.
Local time in area code 610
America/New_York
Prefixes in service
782 of 792 possible
90 rate centers
Area code 610 facts
| Location | Pennsylvania, United States |
|---|---|
| Time zone | Eastern Time |
| Overlays | 484, 835 |
| Split from | 215 |
| In service since | January 8, 1994 |
| Local calls | 10 digits |
| Carrier | Not shown. An area code is where a number was issued; numbers port between carriers. Check line type |
Which cities and towns use area code 610?
NANPA records each prefix against a rate center, the local billing area a number belongs to, usually named after its main town. These are the 610 rate centers with the most prefixes in service. 78 smaller ones aren't listed.
| Rate center | Prefixes |
|---|---|
| Philadelphia Suburban Zone 30 | 86 |
| Allentown | 71 |
| Reading | 58 |
| Philadelphia Suburban Zone 28 | 38 |
| Bethlehem | 32 |
| Philadelphia Suburban Zone 23 | 29 |
| Philadelphia Suburban Zone 26 | 25 |
| Philadelphia Suburban Zone 31 | 24 |
| West Chester | 23 |
| Philadelphia Suburban Zone 25 | 19 |
| Philadelphia Suburban Zone 14 | 18 |
| Philadelphia Suburban Zone 11 | 18 |
Source: NANPA central office code assignments, file dated 10/17/2026. Each prefix holds up to 10,000 numbers.
How do I dial a 610 number?
NANPA's dialling plan for 610: local calls inside the code take 10 digits, toll calls 10 digits. From another area code, dial 1 first. From abroad, use +1. The examples use 555-0147, from a range reserved for fictional numbers.
| Local call inside 610 | 610-555-0147 |
|---|---|
| From another US or Canadian area code | 1-610-555-0147 |
| From outside North America | +1 610 555 0147 |
| E.164, for CRMs and SMS tools | +16105550147 |
When did area code 610 start?
Area code 610 went into service on January 8, 1994, split from 215. Today 610, 484 and 835 cover the same area as an overlay, which is why 10-digit dialling is needed for local calls there.
Tools for 610 numbers
- Area code lookup
Look up any code or a whole list of numbers, or find the codes for a state or city.
- Area code time zone
Local time for a list of numbers, with a callable-now flag.
- NPA-NXX lookup
Rate center and state for one prefix, a level below the area code.
- TCPA calling hours checker
Whether it's inside the federal 8 a.m. to 9 p.m. calling window there now.
Next step
A 610 number tells you where it was issued, not what it is now.
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Area code 610 questions
- What state is area code 610?
- Area code 610 is in Pennsylvania, United States. Its largest rate centers by number of prefixes are Philadelphia Suburban Zone 30, Allentown, Reading, Philadelphia Suburban Zone 28 and Bethlehem.
- What time zone is area code 610 in?
- Eastern Time.
- What area codes overlay 610?
- 484 and 835. An overlay adds a new code to the same area instead of splitting it, so neighbours can have different area codes and local calls need 10 digits.
- When did area code 610 start?
- Area code 610 went into service on January 8, 1994, split from 215.
- Is a 610 number a cell phone or a landline?
- The area code can't tell you. In the US and Canada mobiles, landlines and VoIP lines share area codes and prefixes, and numbers move between carriers and line types. Only a live line-type lookup answers it for one number.
- How many phone numbers does area code 610 have?
- 782 of its 792 possible prefixes are in service, and each prefix holds up to 10,000 numbers. That counts prefixes assigned to carriers, not numbers in use.
Other area codes in Pennsylvania
Sources
Location, overlays, in-service date and dialling plan: NANPA NPA database, file dated 10/16/2026. Prefixes and rate centers: NANPA central office code assignments, 10/17/2026. Time zones mapped to the IANA time zone database. By the SimpleVerifier Team; how we build these pages.