516-991 Prefix — Ronkonkoma, New York

Phone numbers starting with 516-991 are based in Ronkonkoma, New York, primarily served by T-Mobile.

Recently looked-up numbers in 516-991

• 516-991-9575

More about this region

Area code 516 directory · About area code 516 · Get a NY phone number

Last updated: May 4, 2026