Arnold, MO Area Codes
Arnold, Missouri (population 20,994) uses area codes 314 and 557.
Arnold has no telephone exchange of its own in NANPA records; it is served by the Oakville exchange about 5.2 km away.
Carriers with Arnold numbers
13 prefixes are assigned to the Oakville exchange: 0% mobile, 54% VoIP and cable, 46% landline.
| Carrier | Prefixes |
|---|---|
| Onvoy (Sinch) | 5 |
| AT&T (Southwestern Bell) | 2 |
| Verizon Business (MCImetro) | 1 |
| Paetec Itel | 1 |
| Lumen (Level 3) | 1 |
| Leap Telecom | 1 |
| Fractel | 1 |
| Five9 | 1 |
Area codes used in Arnold
| Area code | Prefixes serving Arnold | Main carriers in this code |
|---|---|---|
| 314 | 11 | AT&T (Southwestern Bell), AT&T Mobility, T-Mobile |
| 557 | 2 | AT&T Mobility, Onvoy (Sinch), AT&T (Teleport) |
Arnold phone number prefixes
Numbers starting with these first six digits were originally assigned to the Oakville exchange.
314-293AT&T (Southwestern Bell)314-334Verizon Business (MCImetro)314-375Paetec Itel314-380Onvoy (Sinch)314-464Onvoy (Sinch)314-470Onvoy (Sinch)314-549Lumen (Level 3)314-636Leap Telecom314-794Onvoy (Sinch)314-846AT&T (Southwestern Bell)314-988Fractel557-207Five9557-258Onvoy (Sinch)
Nearby cities in area code 314
- St. Louis
- Oakville
- University City
- Kirkwood
- Mehlville
- Maryland Heights
- Webster Groves
- Affton
- Creve Coeur
- Spanish Lake
- Concord
- Ferguson
Questions
- What is the area code for Arnold, MO?
- Arnold uses 2 area codes: 314 and 557. They overlay each other, so all of them cover the whole city and you dial 10 digits for local calls.
- What time zone is Arnold in?
- Arnold is in the Central time zone.