Littleton City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 252 | US | North Carolina - NC | Littleton | Eastern | Details |
| 303 | US | Colorado - CO | Littleton | Mountain | Details |
| 309 | US | Illinois - IL | Littleton | Central | Details |
| 603 | US | New Hampshire - NH | Littleton | Eastern | Details |
| 720 | US | Colorado - CO | Littleton | Mountain | Details |
| 978 | US | Massachusetts - MA | Littleton | Eastern | Details |