Area code 240
Get a 240 phone number
To get a 240 phone number, pick an available 240 number below and sign up for AvoCall. Your new number works for calls and texts on the phone you already own over WiFi or data. Current web pricing is verified at checkout. No second SIM and no new device are required.
- Location
- Rockville, MD, Maryland
- Time zone
- Eastern (GMT -5)
- Related area codes
- Related:301
The 240 area code covers Rockville, MD and nearby Maryland communities.
Top 20 240 numbers available right now
Pulled live from our carrier network. Last updated: August 25, 2026 at 4:52 PM UTC.
Every number requires an AvoCall plan. Current web pricing is verified at checkout, and number availability changes often.
About the 240 area code
The Rockville area of Maryland falls under 240, a code shared by Silver Spring, Frederick, Waldorf, and Columbia. Everything in the territory runs on Eastern time.
Active since 1997, the code was placed over the existing 301 area as an overlay. It now forms a three-code overlay complex with 227 and 301, and local dialing throughout the shared area uses ten digits.
Dialing note: 240 is part of an overlay complex with 227, 301, so local calls in this area are dialed with all ten digits.
Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 07/16/2026.
240 phone number FAQ
- How do I get a 240 phone number?
- Pick an available 240 number and sign up for AvoCall. Your new Rockville, MD number works for calls and texts on your existing phone over WiFi or data. Current web pricing is verified at checkout. There is no second SIM and no new device.
- Where is the 240 area code?
- It serves Rockville, MD and nearby cities in Maryland, including Baltimore, Columbia, Waldorf.
- Can I receive verification codes on a 240 number?
- AvoCall 240 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.