Collinsville - 860 dialing code
Dialing code +1 (860) cities
- Rockville
- Collinsville
- Hartford
- Putnam
- Thomaston
- Clinton
- Portland
- Waterford
- Kensington
- Durham
- Litchfield
- Manchester
- Middletown
- Oakville
- Baltic
- Bantam
- Blue Hills
- Bristol
- Broad Brook
- Brooklyn
- Canaan
- Canton Valley
- Chester Center
- Colchester
- Conning Towers Nautilus Park
- Coventry Lake
- Crystal Lake
- Danielson
- Deep River Center
- East Brooklyn
- East Hampton
- East Hartford
- Essex Village
- Falls Village
- Fenwick
- Gales Ferry
- Glastonbury Center
- Groton
- Groton Long Point
- Hazardville
- Higganum
- Jewett City
- Lake Pocotopaug
- Lakeville
- Long Hill
- Mansfield Center
- Mashantucket
- Moodus
- Moosup
- Mystic
- New Britain
- New Hartford Center
- Newington
- New London
- New Milford
- New Preston
- Niantic
- Noank
- Norfolk
- North Granby
- North Grosvenor Dale
- Northwest Harwinton
- Norwich
- Old Mystic
- Old Saybrook Center
- Oxoboxo River
- Pawcatuck
- Plainfield Village
- Poquonock Bridge
- Quinebaug
- Salmon Brook
- Saybrook Manor
- Sharon
- Sherwood Manor
- Simsbury Center
- Somers
- South Coventry
- South Windham
- Southwood Acres
- South Woodstock
- Stafford Springs
- Stonington
- Storrs
- Suffield Depot
- Tariffville
- Terramuggus
- Terryville
- Thompsonville
- Torrington
- Watertown
- Wauregan
- Weatogue
- Westbrook Center
- West Hartford
- West Simsbury
- Wethersfield
- Willimantic
- Windsor Locks
- Winsted