Southold - 631 dialing code
Dialing code +1 (631) cities
- Northport
- Riverside
- Deer Park
- Holbrook
- Huntington
- Shirley
- Oakdale
- Brentwood
- North Haven
- East Hampton
- Terryville
- Laurel
- Bayport
- Orient
- Elwood
- Lindenhurst
- St. James
- Melville
- Eastport
- Calverton
- Northampton
- Medford
- Bay Shore
- Northville
- Shoreham
- Brookhaven
- Jamesport
- Coram
- Rocky Point
- East Farmingdale
- Amagansett
- Amityville
- Aquebogue
- Asharoken
- Babylon
- Baiting Hollow
- Baywood
- Belle Terre
- Bellport
- Blue Point
- Bohemia
- Bridgehampton
- Brightwaters
- Centereach
- Center Moriches
- Centerport
- Central Islip
- Cold Spring Harbor
- Commack
- Copiague
- Cutchogue
- Dering Harbor
- Dix Hills
- East Hampton North
- East Islip
- East Marion
- East Moriches
- East Northport
- East Patchogue
- East Quogue
- East Shoreham
- Eatons Neck
- Farmingville
- Fire Island
- Fishers Island
- Flanders
- Fort Salonga
- Gilgo
- Gordon Heights
- Great River
- Greenlawn
- Greenport
- Greenport West
- Halesite
- Hampton Bays
- Hauppauge
- Head of the Harbor
- Holtsville
- Huntington Bay
- Huntington Station
- Islandia
- Islip
- Islip Terrace
- Kings Park
- Lake Grove
- Lake Ronkonkoma
- Lloyd Harbor
- Manorville
- Mastic
- Mastic Beach
- Mattituck
- Middle Island
- Miller Place
- Montauk
- Moriches
- Mount Sinai
- Napeague
- Nesconset
- New Suffolk
- Nissequogue
- North Amityville
- North Babylon
- North Bay Shore
- North Bellport
- North Great River
- North Lindenhurst
- North Patchogue
- North Sea
- Northwest Harbor
- Noyack
- Oak Beach-Captree
- Ocean Beach
- Old Field
- Patchogue
- Peconic
- Poquott
- Port Jefferson
- Port Jefferson Station
- Quiogue
- Quogue
- Remsenburg-Speonk
- Ridge
- Riverhead
- Ronkonkoma
- Sagaponack
- Sag Harbor
- Saltaire
- Sayville
- Selden
- Setauket-East Setauket
- Shelter Island
- Shelter Island Heights
- Shinnecock Hills
- Smithtown
- Sound Beach
- Southampton
- South Huntington
- Southold
- Springs
- Stony Brook
- Stony Brook University
- Tuckahoe
- Village of the Branch
- Wading River
- Wainscott
- Water Mill
- West Babylon
- West Bay Shore
- Westhampton
- Westhampton Beach
- West Hampton Dunes
- West Hills
- West Islip
- West Sayville
- Wheatley Heights
- Wyandanch
- Yaphank