856-504 Prefix — Mountholly, New Jersey

Phone numbers starting with 856-504 are based in Mountholly, New Jersey, primarily served by Metro By T-Mobile.

Recently looked-up numbers in 856-504

• 856-504-7025

More about this region

Area code 856 directory · About area code 856 · Get a NJ phone number

Last updated: May 28, 2026